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TinyTracer.cpp
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/*
* TinyTracer, CC by: [email protected]
* Runs with: Intel PIN (https://software.intel.com/en-us/articles/pin-a-dynamic-binary-instrumentation-tool)
*
* Documentation: https://github.com/hasherezade/tiny_tracer/wiki
*/
#include "pin.H"
#include <iostream>
#include <string>
#include <set>
#include <sstream>
#include <bitset>
#include "TinyTracer.h"
#include "ProcessInfo.h"
#include "TraceLog.h"
#include "PinLocker.h"
#include "DisasmCache.h"
#define TOOL_NAME "TinyTracer"
#define VERSION "2.9.6"
#include "Util.h"
#include "Settings.h"
#define LOGGED_ARGS_MAX 11
#define USE_ANTIDEBUG
#define USE_ANTIVM
#ifndef _WIN32
#undef USE_ANTIDEBUG // works only for Windows!
#undef USE_ANTIVM
#endif
#ifdef USE_ANTIDEBUG
#include "AntiDebug.h"
#endif
#ifdef USE_ANTIVM
#include "AntiVm.h"
#endif
bool g_IsIndirectSyscall = false;
/* ================================================================== */
// Global variables
/* ================================================================== */
Settings m_Settings;
ProcessInfo pInfo;
TraceLog traceLog;
// last shellcode to which the transition got redirected:
std::set<ADDRINT> m_tracedShellc;
// Full pin path
std::string pinPath;
/* ===================================================================== */
// Command line switches
/* ===================================================================== */
KNOB<std::string> KnobOutputFile(KNOB_MODE_WRITEONCE, "pintool",
"o", "", "Specify file name for the output");
KNOB<std::string> KnobIniFile(KNOB_MODE_WRITEONCE, "pintool",
"s", "", "Specify the settings file");
KNOB<std::string> KnobModuleName(KNOB_MODE_WRITEONCE, "pintool",
"m", "", "Analysed module name (by default same as app name)");
KNOB<std::string> KnobWatchListFile(KNOB_MODE_WRITEONCE, "pintool",
"b", "", "A list of watched functions (dump parameters before the execution)");
KNOB<std::string> KnobSyscallsTable(KNOB_MODE_WRITEONCE, "pintool",
"l", "", "Syscall table: a CSV file mapping a syscall ID (in hex) to a function name");
KNOB<std::string> KnobExcludedListFile(KNOB_MODE_WRITEONCE, "pintool",
"x", "", "A list of functions excluded from watching");
KNOB<std::string> KnobStopOffsets(KNOB_MODE_WRITEONCE, "pintool",
"p", "", "A list of stop offsets: RVAs of the traced module where the execution should pause");
/* ===================================================================== */
// Utilities
/* ===================================================================== */
VOID _LogFunctionArgs(const ADDRINT Address, const CHAR* name, uint32_t argCount, VOID* arg1, VOID* arg2, VOID* arg3, VOID* arg4, VOID* arg5, VOID* arg6, VOID* arg7, VOID* arg8, VOID* arg9, VOID* arg10, VOID* arg11);
/*!
* Print out help message.
*/
INT32 Usage()
{
std::cerr << "This tool prints out : " << std::endl <<
"Addresses of redirections into to a new sections. Called API functions.\n" << std::endl;
std::cerr << KNOB_BASE::StringKnobSummary() << std::endl;
return -1;
}
/* ===================================================================== */
// Analysis utilities
/* ===================================================================== */
BOOL isInTracedShellc(const ADDRINT addr)
{
if (addr == UNKNOWN_ADDR) {
return FALSE;
}
const ADDRINT regionBase = query_region_base(addr);
if (regionBase == UNKNOWN_ADDR) {
return FALSE;
}
if (m_tracedShellc.find(regionBase) != m_tracedShellc.end()) {
return TRUE;
}
return FALSE;
}
WatchedType isWatchedAddress(const ADDRINT Address)
{
if (Address == UNKNOWN_ADDR) {
return WatchedType::NOT_WATCHED;
}
const IMG currModule = IMG_FindByAddress(Address);
const bool isCurrMy = pInfo.isMyAddress(Address);
if (isCurrMy) {
return WatchedType::WATCHED_MY_MODULE;
}
const BOOL isShellcode = !IMG_Valid(currModule);
if (m_Settings.followShellcode && isShellcode) {
if (m_Settings.followShellcode == SHELLC_FOLLOW_ANY) {
return WatchedType::WATCHED_SHELLCODE;
}
if (isInTracedShellc(Address)){
return WatchedType::WATCHED_SHELLCODE;
}
}
return WatchedType::NOT_WATCHED;
}
/* ===================================================================== */
// Analysis routines
/* ===================================================================== */
inline ADDRINT getReturnFromTheStack(const CONTEXT* ctx)
{
if (!ctx) return UNKNOWN_ADDR;
ADDRINT retAddr = UNKNOWN_ADDR;
const ADDRINT* stackPtr = reinterpret_cast<ADDRINT*>(PIN_GetContextReg(ctx, REG_STACK_PTR));
size_t copiedSize = PIN_SafeCopy(&retAddr, stackPtr, sizeof(retAddr));
if (copiedSize != sizeof(retAddr)) {
return UNKNOWN_ADDR;
}
return retAddr;
}
std::string flagsToStr(ADDRINT oldFlags, ADDRINT flags)
{
const int flag[] = {
0x1,
0x4,
0x10,
0x40,
0x80,
0x100,
0x200,
0x400,
0x800
};
const char flagName[] = {
'C', 'P', 'A', 'Z', 'S', 'T', 'I', 'D', 'O'
};
const size_t max = sizeof(flag) / sizeof(flag[0]);
std::stringstream ss;
ss << "[";
for (size_t i = 0; i < max; i++) {
ADDRINT flagSet = flags & flag[i];
if (flagSet != (oldFlags & flag[i])) {
ss << " " << flagName[i] << "=" << (flagSet != 0);
}
}
ss << " ]";
return ss.str();
}
std::string dumpContext(const std::string& disasm, const CONTEXT* ctx)
{
const char* reg_names[] = {
"rdi",
"rsi",
"rbp",
"rsp",
"rbx",
"rdx",
"rcx",
"rax",
"r8",
"r9",
"r10",
"r11",
"r12",
"r13",
"r14",
"r15",
"flags"
};
const REG regs[] =
{
REG_GDI,
REG_GSI,
REG_GBP,
REG_STACK_PTR,
REG_GBX,
REG_GDX,
REG_GCX,
REG_GAX,
#ifdef _WIN64
REG_R8,
REG_R9,
REG_R10,
REG_R11,
REG_R12,
REG_R13,
REG_R14,
REG_R15,
#endif
REG_GFLAGS
};
const size_t regsCount = sizeof(regs) / sizeof(regs[0]);
static ADDRINT values[regsCount] = { 0 };
static ADDRINT spVal = 0;
std::stringstream ss;
ADDRINT Address = getReturnFromTheStack(ctx);
if (Address != spVal) {
ss << "[rsp] -> 0x" << std::hex << Address << "; ";
spVal = Address;
}
ADDRINT prev = 0;
for (size_t i = 0; i < regsCount; i++) {
REG reg = regs[i];
const ADDRINT Address = (ADDRINT)PIN_GetContextReg(ctx, reg);
if (values[i] == Address) {
continue;
}
// update saved:
prev = values[i];
values[i] = Address;
ss << reg_names[i] << " = 0x" << std::hex << Address;
if (reg == REG_GFLAGS) {
ss << " " << flagsToStr(prev, Address);
}
ss << "; ";
}
std::string out = ss.str();
if (!out.empty()) {
return "{ " + out + "}";
}
return "";
}
VOID SaveHeavensGateTransitions(const ADDRINT addrFrom, const ADDRINT addrTo, ADDRINT seg, const CONTEXT* ctx = NULL)
{
PinLocker locker;
const WatchedType wType = isWatchedAddress(addrFrom);
if (wType == WatchedType::NOT_WATCHED) {
return;
}
ADDRINT pageFrom = 0;
if (wType == WatchedType::WATCHED_SHELLCODE) {
pageFrom = query_region_base(addrFrom);
}
ADDRINT RvaFrom = addr_to_rva(addrFrom);
std::stringstream ss;
if (seg == 0x33) {
ss << "Heaven's Gate -> switch to 64 bit : ";
}
else if (seg == 0x23) {
ss << "Heaven's Gate -> switch to 32 bit : ";
}
else {
ss << "Unknown Far transition ";
if (seg) ss << "seg: " << std::hex << seg << " : ";
}
if (addrTo) ss << std::hex << addrTo;
traceLog.logInstruction(pageFrom, RvaFrom, ss.str());
PIN_WriteErrorMessage("ERROR: Cannot trace after the far transition", 1000, PIN_ERR_SEVERITY_TYPE::PIN_ERR_FATAL, 0);
}
std::string resolve_func_name(const ADDRINT addrTo, const std::string& dll_name, const CONTEXT* ctx)
{
ADDRINT diff = 0;
const std::string name = get_func_at(addrTo, diff);
if (!diff) {
// simple case, return the name
return name;
}
// it doesn't start at the beginning of the routine:
std::ostringstream sstr;
sstr << "[" << name << "+" << std::hex << diff << "]*";
#ifdef _WIN32
if (ctx
&& SyscallsTable::isSyscallFuncName(name)
&& SyscallsTable::isSyscallDll(util::getDllName(dll_name))
)
{
//possibly a proxy to the indirect syscall
g_IsIndirectSyscall = true;
const ADDRINT eax = (ADDRINT)PIN_GetContextReg(ctx, REG_GAX);
const std::string realName = m_Settings.syscallsTable.getName(eax);
sstr << " -> ";
if (realName.length()) {
sstr << realName;
}
else {
sstr << "SYSCALL:0x" << eax;
}
}
#endif //_WIN32
return sstr.str();
}
VOID _SaveTransitions(const ADDRINT addrFrom, const ADDRINT addrTo, BOOL isIndirect, const CONTEXT* ctx = NULL)
{
const WatchedType fromWType = isWatchedAddress(addrFrom); // is the call from the traced area?
const bool isTargetMy = pInfo.isMyAddress(addrTo);
const bool isCallerMy = pInfo.isMyAddress(addrFrom);
IMG targetModule = IMG_FindByAddress(addrTo);
IMG callerModule = IMG_FindByAddress(addrFrom);
const bool isCallerPeModule = IMG_Valid(callerModule);
const bool isTargetPeModule = IMG_Valid(targetModule);
/**
is it a transition from the traced module to a foreign module?
*/
if (fromWType == WatchedType::WATCHED_MY_MODULE
&& !isTargetMy)
{
ADDRINT RvaFrom = addr_to_rva(addrFrom);
if (isTargetPeModule) {
const std::string dll_name = IMG_Name(targetModule);
const std::string func = resolve_func_name(addrTo, dll_name, ctx);
if (m_Settings.excludedFuncs.contains(dll_name, func)) {
return;
}
traceLog.logCall(0, RvaFrom, true, dll_name, func);
}
else {
//not in any of the mapped modules:
const ADDRINT pageTo = query_region_base(addrTo);
m_tracedShellc.insert(pageTo); //save the beginning of this area
traceLog.logCall(0, RvaFrom, pageTo, addrTo);
}
}
/**
trace calls from witin a shellcode:
*/
if (fromWType == WatchedType::WATCHED_SHELLCODE) {
const ADDRINT pageFrom = query_region_base(addrFrom);
const ADDRINT pageTo = query_region_base(addrTo);
if (isTargetPeModule) { // it is a call to a module
const std::string dll_name = IMG_Name(targetModule);
const std::string func = resolve_func_name(addrTo, dll_name, ctx);
if (m_Settings.excludedFuncs.contains(dll_name, func)) {
return;
}
traceLog.logCall(pageFrom, addrFrom, false, dll_name, func);
}
else if (pageFrom != pageTo) // it is a call to another shellcode
{
// add the new shellcode to the set of traced
if (m_Settings.followShellcode == SHELLC_FOLLOW_RECURSIVE) {
m_tracedShellc.insert(pageTo);
}
// register the transition
if (m_Settings.logShelcTrans) {
// save the transition from one shellcode to the other
ADDRINT base = get_base(addrFrom);
ADDRINT RvaFrom = addrFrom - base;
traceLog.logCall(base, RvaFrom, pageTo, addrTo);
}
}
}
/**
save the transition when a shellcode returns to a traced area from an API call:
*/
if (fromWType == WatchedType::NOT_WATCHED && !isCallerPeModule // from an untraced shellcode...
&& isTargetPeModule // ...into an API call
&& ctx //the context was passed: we can check the return
)
{
// was the shellcode a proxy for making an API call?
const ADDRINT returnAddr = getReturnFromTheStack(ctx);
const WatchedType toWType = isWatchedAddress(returnAddr); // does it return into the traced area?
if (toWType != WatchedType::NOT_WATCHED) {
const std::string dll_name = IMG_Name(targetModule);
const std::string func = resolve_func_name(addrTo, dll_name, ctx);
if (m_Settings.excludedFuncs.contains(dll_name, func)) {
return;
}
const ADDRINT pageRet = get_base(returnAddr);
const ADDRINT RvaFrom = addr_to_rva(addrFrom);
const ADDRINT base = isTargetMy ? 0 : get_base(addrFrom);
traceLog.logCallRet(base, RvaFrom, pageRet, returnAddr, dll_name, func);
}
}
/**
trace indirect calls to your own functions
*/
if (fromWType == WatchedType::WATCHED_MY_MODULE
&& isTargetMy && m_Settings.logIndirect && isIndirect)
{
const ADDRINT baseTo = get_base(addrTo);
ADDRINT base = get_base(addrFrom);
if (base != UNKNOWN_ADDR && baseTo != UNKNOWN_ADDR) {
const ADDRINT RvaFrom = addrFrom - base;
const ADDRINT calledRVA = addrTo - baseTo;
traceLog.logIndirectCall(0, RvaFrom, true, baseTo, calledRVA);
}
}
/**
trace transitions between the sections of the traced module:
*/
if (isTargetMy) {
ADDRINT rva = addr_to_rva(addrTo); // convert to RVA
// is it a transition from one section to another?
if (pInfo.updateTracedModuleSection(rva)) {
if (m_Settings.logSectTrans) {
const s_module* sec = pInfo.getSecByAddr(rva);
std::string curr_name = (sec) ? sec->name : "?";
if (isCallerMy) {
ADDRINT rvaFrom = addr_to_rva(addrFrom); // convert to RVA
const s_module* prev_sec = pInfo.getSecByAddr(rvaFrom);
std::string prev_name = (prev_sec) ? prev_sec->name : "?";
traceLog.logNewSectionCalled(rvaFrom, prev_name, curr_name);
}
traceLog.logSectionChange(rva, curr_name);
}
}
}
}
VOID SaveTransitions(const ADDRINT prevVA, const ADDRINT Address, BOOL isIndirect, const CONTEXT* ctx)
{
PinLocker locker;
_SaveTransitions(prevVA, Address, isIndirect, ctx);
}
VOID LogMsgAtAddress(const WatchedType wType, const ADDRINT Address, const char* label, const char* msg, const char* link)
{
if (!msg) return;
if (wType == WatchedType::NOT_WATCHED) return;
std::stringstream ss;
ADDRINT rva = UNKNOWN_ADDR;
if (wType == WatchedType::WATCHED_MY_MODULE) {
rva = addr_to_rva(Address); // convert to RVA
}
else if (wType == WatchedType::WATCHED_SHELLCODE) {
const ADDRINT start = query_region_base(Address);
rva = Address - start;
if (start != UNKNOWN_ADDR) {
ss << "> " << std::hex << start << "+";
}
}
if (rva == UNKNOWN_ADDR) return;
ss << std::hex << rva << TraceLog::DELIMITER;
if (label) {
ss << label;
}
ss << msg;
if (link) {
ss << TraceLog::DELIMITER << link;
}
traceLog.logLine(ss.str());
}
VOID RdtscCalled(const CONTEXT* ctxt)
{
PinLocker locker;
const ADDRINT Address = (ADDRINT)PIN_GetContextReg(ctxt, REG_INST_PTR);
const WatchedType wType = isWatchedAddress(Address);
if (wType == WatchedType::NOT_WATCHED) return;
LogMsgAtAddress(wType, Address, nullptr, "RDTSC", nullptr);
}
VOID PauseAtOffset(const CONTEXT* ctxt)
{
PinLocker locker;
if (!m_Settings.stopOffsets.size()) return;
const ADDRINT Address = (ADDRINT)PIN_GetContextReg(ctxt, REG_INST_PTR);
const WatchedType wType = isWatchedAddress(Address);
if (wType != WatchedType::WATCHED_MY_MODULE) return;
const ADDRINT rva = addr_to_rva(Address); // convert to RVA
auto itr = m_Settings.stopOffsets.find(StopOffset(rva));
if (itr == m_Settings.stopOffsets.end()) {
return;
}
{//log info
std::stringstream ss;
ss << "# Stop offset reached: RVA = 0x" << std::hex << rva << ". Sleeping " << std::dec << m_Settings.stopOffsetTime << " s.";
if (itr->times) {
ss << " Hits remaining: " << (itr->times - 1);
}
traceLog.logLine(ss.str());
std::cerr << ss.str() << std::endl;
}
StopOffset &so = const_cast<StopOffset &>(*itr);
if (so.times != 0) { // if the StopOffset with times 0 is on the list, it means it should be executed infinite number of times
so.times--;
if (so.times == 0) {
m_Settings.stopOffsets.erase(itr); //erase
}
}
const int sleepMs = m_Settings.stopOffsetTime * 1000;
PIN_Sleep(sleepMs);
{//log info
std::stringstream ss;
ss.clear();
ss << "# Resuming execution";
traceLog.logLine(ss.str());
std::cerr << ss.str() << std::endl;
}
}
VOID CpuidCalled(const CONTEXT* ctxt)
{
PinLocker locker;
const std::string mnem = "CPUID";
const ADDRINT Address = (ADDRINT)PIN_GetContextReg(ctxt, REG_INST_PTR);
const WatchedType wType = isWatchedAddress(Address);
if (wType == WatchedType::NOT_WATCHED) return;
ADDRINT Param = (ADDRINT)PIN_GetContextReg(ctxt, REG_GAX);
if (wType == WatchedType::WATCHED_MY_MODULE) {
ADDRINT rva = addr_to_rva(Address); // convert to RVA
traceLog.logInstruction(0, rva, mnem, Param);
}
if (wType == WatchedType::WATCHED_SHELLCODE) {
const ADDRINT start = query_region_base(Address);
ADDRINT rva = Address - start;
if (start != UNKNOWN_ADDR) {
traceLog.logInstruction(start, rva, mnem, Param);
}
}
}
BOOL fetchInterruptID(const ADDRINT Address, int &intID)
{
unsigned char copyBuf[2] = { 0 };
int fetchedSize = 1;
std::string mnem;
if (!PIN_FetchCode(copyBuf, (const void*)Address, fetchedSize, NULL)) return FALSE;
if (copyBuf[0] == 0xCD) { // INT
fetchedSize = 2;
if (!PIN_FetchCode(copyBuf, (const void*)Address, fetchedSize, NULL)) return FALSE;
}
switch (copyBuf[0]) {
case 0xCC:
intID = 3; break;
case 0xCE:
intID = 4; break;
case 0xF1:
intID = 1; break;
case 0xCD:
{
intID = (unsigned int)copyBuf[1];
break;
}
}
return TRUE;
}
VOID InterruptCalled(const CONTEXT* ctxt)
{
PinLocker locker;
const ADDRINT Address = (ADDRINT)PIN_GetContextReg(ctxt, REG_INST_PTR);
const WatchedType wType = isWatchedAddress(Address);
if (wType == WatchedType::NOT_WATCHED) {
return;
}
int interruptID = 0;
if (!fetchInterruptID(Address, interruptID)) return;
const std::string mnem = "INT";
if (wType == WatchedType::WATCHED_MY_MODULE) {
ADDRINT rva = addr_to_rva(Address); // convert to RVA
traceLog.logInstruction(0, rva, mnem, interruptID);
}
if (wType == WatchedType::WATCHED_SHELLCODE) {
const ADDRINT start = query_region_base(Address);
ADDRINT rva = Address - start;
if (start != UNKNOWN_ADDR) {
traceLog.logInstruction(start, rva, mnem, interruptID);
}
}
}
VOID LogSyscallsArgs(const CHAR* name, const CONTEXT* ctxt, SYSCALL_STANDARD std, const ADDRINT Address, uint32_t argCount)
{
const size_t args_max = LOGGED_ARGS_MAX;
VOID* syscall_args[args_max] = { 0 };
for (size_t i = 0; i < args_max; i++) {
if (i == argCount) break;
syscall_args[i] = reinterpret_cast<VOID*>(PIN_GetSyscallArgument(ctxt, std, i));
}
_LogFunctionArgs(Address,
name, argCount,
syscall_args[0],
syscall_args[1],
syscall_args[2],
syscall_args[3],
syscall_args[4],
syscall_args[5],
syscall_args[6],
syscall_args[7],
syscall_args[8],
syscall_args[9],
syscall_args[10]);
}
BOOL _fetchSyscallData(CONTEXT* ctxt, SYSCALL_STANDARD &std, ADDRINT &address)
{
#ifdef _WIN64
// Since Windows 10 TH2, NTDLL's syscall routines have changed: syscalls can
// now be performed with the SYSCALL instruction, and with the INT 2E
// instruction. The ABI is the same in both cases.
if (std == SYSCALL_STANDARD_WINDOWS_INT) {
const auto* insPtr = reinterpret_cast<ADDRINT*>(PIN_GetContextReg(ctxt, REG_INST_PTR));
uint16_t instruction = 0;
PIN_SafeCopy(&instruction, insPtr, sizeof(instruction));
if (instruction != 0x2ECD) { // INT 2E
// Not a relevant interrupt, return now.
return FALSE;
}
std = SYSCALL_STANDARD_IA32E_WINDOWS_FAST;
}
#endif
const auto _address = [&]() -> ADDRINT {
if (std == SYSCALL_STANDARD_WOW64) {
// Note: In this case, the current instruction address is in a 64-bit
// code portion. The address that we're interested in is the return
// address, which is in a 32-bit code portion.
return getReturnFromTheStack(ctxt);
}
return PIN_GetContextReg(ctxt, REG_INST_PTR);
}();
if (_address == UNKNOWN_ADDR) return FALSE; //invalid
address = _address;
return TRUE;
}
//---
struct SyscallInfo
{
ADDRINT ssid;
ADDRINT addrFrom;
SyscallInfo(ADDRINT _ssid = UNKNOWN_ADDR, ADDRINT _addrFrom = UNKNOWN_ADDR)
: ssid(_ssid), addrFrom(_addrFrom) {}
SyscallInfo(const SyscallInfo& other)
: ssid(other.ssid), addrFrom(other.addrFrom) { }
void fill(ADDRINT _ssid, ADDRINT _addrFrom )
{
this->ssid = _ssid;
this->addrFrom = _addrFrom;
}
void reset()
{
this->fill(UNKNOWN_ADDR, UNKNOWN_ADDR);
}
};
std::map<THREADID, SyscallInfo> syscallFromThread;
VOID SyscallCalled(THREADID tid, CONTEXT* ctxt, SYSCALL_STANDARD std, VOID* v)
{
PinLocker locker;
//reset just in case:
syscallFromThread[tid] = SyscallInfo();
ADDRINT address = UNKNOWN_ADDR;
if (!_fetchSyscallData(ctxt, std, address)) {
return;
}
const WatchedType wType = isWatchedAddress(address);
if (wType == WatchedType::NOT_WATCHED && !g_IsIndirectSyscall) {
return;
}
ADDRINT syscallNum = PIN_GetSyscallNumber(ctxt, std);
if (syscallNum == UNKNOWN_ADDR) return; //invalid
syscallNum &= MAX_WORD;
syscallFromThread[tid].fill(syscallNum, address);
const std::string syscallFuncName = SyscallsTable::convertNameToNt(m_Settings.syscallsTable.getName(syscallNum));
if (wType == WatchedType::WATCHED_MY_MODULE) {
ADDRINT rva = addr_to_rva(address); // convert to RVA
traceLog.logSyscall(0, rva, syscallNum, syscallFuncName);
}
else if (wType == WatchedType::WATCHED_SHELLCODE) {
const ADDRINT start = query_region_base(address);
ADDRINT rva = address - start;
if (start != UNKNOWN_ADDR) {
traceLog.logSyscall(start, rva, syscallNum, syscallFuncName);
}
}
// Log arguments if needed:
//
// check if it is watched by the syscall number:
#ifdef _WIN32 // used only on Windows
bool argsDumped = false;
#endif //_WIN32
const auto& it = m_Settings.funcWatch.syscalls.find(syscallNum);
if (it != m_Settings.funcWatch.syscalls.end()) {
LogSyscallsArgs(WSyscallInfo::formatSyscallName(syscallNum).c_str(), ctxt, std, address, it->second.paramCount);
#ifdef _WIN32 // used only on Windows
argsDumped = true;
#endif //_WIN32
}
#ifdef _WIN32 // supported only for Windows
// check if it is watched by the function name:
if (!argsDumped) {
for (size_t i = 0; i < m_Settings.funcWatch.funcs.size(); i++) {
if (SyscallsTable::isSyscallDll(m_Settings.funcWatch.funcs[i].dllName)) {
std::string watchFuncName = SyscallsTable::convertNameToNt(m_Settings.funcWatch.funcs[i].funcName);
if (util::iequals(syscallFuncName, watchFuncName)) {
LogSyscallsArgs(watchFuncName.c_str(), ctxt, std, address, m_Settings.funcWatch.funcs[i].paramCount);
argsDumped = true;
break;
}
}
}
}
#ifdef USE_ANTIDEBUG
if (m_Settings.antidebug != WATCH_DISABLED) {
AntiDbg::MonitorSyscallEntry(tid, syscallFuncName.c_str(), ctxt, std, address);
}
#endif //USE_ANTIDEBUG
#ifdef USE_ANTIVM
if (m_Settings.antivm != WATCH_DISABLED) {
AntiVm::MonitorSyscallEntry(tid, syscallFuncName.c_str(), ctxt, std, address);
}
#endif //USE_ANTIVM
#endif //_WIN32
}
VOID SyscallCalledAfter(THREADID tid, CONTEXT* ctxt, SYSCALL_STANDARD std, VOID* v)
{
PinLocker locker;
g_IsIndirectSyscall = false; //reset
auto itr = syscallFromThread.find(tid);
if (itr == syscallFromThread.end() || itr->second.ssid == UNKNOWN_ADDR) {
return;
}
#ifdef USE_ANTIVM
const ADDRINT syscallNum = itr->second.ssid;
#endif //USE_ANTIVM
const ADDRINT address = itr->second.addrFrom;
itr->second.reset(); // sycall completed, erase the stored info
if (address == UNKNOWN_ADDR) {
return;
}
#ifdef USE_ANTIVM
if (m_Settings.antivm != WATCH_DISABLED) {
const std::string syscallFuncName = SyscallsTable::convertNameToNt(m_Settings.syscallsTable.getName(syscallNum));
AntiVm::MonitorSyscallExit(tid, syscallFuncName.c_str(), ctxt, std, address);
}
#endif //USE_ANTIVM
}
ADDRINT _setTimer(const CONTEXT* ctxt, bool isEax)
{
static UINT64 Timer = 0;
UINT64 result = 0;
if (Timer == 0) {
ADDRINT edx = (ADDRINT)PIN_GetContextReg(ctxt, REG_GDX);
ADDRINT eax = (ADDRINT)PIN_GetContextReg(ctxt, REG_GAX);
Timer = (UINT64(edx) << 32) | eax;
}
else {
Timer += 100;
}
if (isEax) {
result = (Timer << 32) >> 32;
}
else {
result = (Timer) >> 32;
}
return (ADDRINT)result;
}
ADDRINT AlterRdtscValueEdx(const CONTEXT* ctxt)
{
PinLocker locker;
return _setTimer(ctxt, false);
}
ADDRINT AlterRdtscValueEax(const CONTEXT* ctxt)
{
PinLocker locker;
return _setTimer(ctxt, true);
}
/* ===================================================================== */
// Instrument functions arguments
/* ===================================================================== */
BOOL isValidReadPtr(VOID* arg1)
{
const ADDRINT start = query_region_base((ADDRINT)arg1);
const BOOL isReadableAddr = (start != UNKNOWN_ADDR && start != 0) && PIN_CheckReadAccess(arg1);
return isReadableAddr;
}
std::wstring paramToStr(VOID *arg1)
{
if (arg1 == NULL) {
return L"0";
}
std::wstringstream ss;
if (!isValidReadPtr(arg1)) {
// single value
ss << std::hex << (arg1)
<< " = "
<< std::dec << ((size_t)arg1);
return ss.str();
}
// possible pointer:
ss << "ptr " << std::hex << (arg1);
//
// Check if UNICODE_STRING
//
typedef struct _T_UNICODE_STRING {
uint16_t Length;
uint16_t MaximumLength;
wchar_t* Buffer;
} T_UNICODE_STRING;
T_UNICODE_STRING* unicodeS = reinterpret_cast<T_UNICODE_STRING*>(arg1);
const size_t kMaxStr = 300;
if (PIN_CheckReadAccess(&unicodeS->Buffer)
&& (unicodeS->MaximumLength < kMaxStr) && (unicodeS->Length <= unicodeS->MaximumLength)// check if the length makes sense
&& isValidReadPtr(unicodeS->Buffer))
{
const size_t aLen = util::getAsciiLen(reinterpret_cast<char*>(unicodeS->Buffer), 2); // take minimal sample of ASCII string
if (aLen == 1) {
// Must be wide string
size_t wLen = util::getAsciiLenW(unicodeS->Buffer, unicodeS->MaximumLength);
if (wLen >= 1) {
if ((unicodeS->Length / sizeof(wchar_t)) == wLen && unicodeS->MaximumLength >= unicodeS->Length) { // An extra check, just to make sure
ss << " -> ";
ss << "U\"" << unicodeS->Buffer << "\""; // Just made the U up to denote a UNICODE_STRING
return ss.str();
}
}
}
}
bool isString = false;
const char* val = reinterpret_cast<char*>(arg1);
size_t len = util::getAsciiLen(val, kMaxStr);
if (len > 0) {
ss << " -> ";
}
if (len == 1) { // Possible wideString
wchar_t* val = reinterpret_cast<wchar_t*>(arg1);
size_t wLen = util::getAsciiLenW(val, kMaxStr);
if (wLen >= len) {
ss << "L\"" << val << "\"";
isString = true;
}
}
else if (len > 1) { // ASCII string
ss << "\"" << val << "\"";
isString = true;
}
if (!isString) {
ss << " -> {";
ss << util::hexdump(reinterpret_cast<const uint8_t*>(val), m_Settings.hexdumpSize);
ss << "}";
}
return ss.str();
}
VOID _LogFunctionArgs(const ADDRINT Address, const CHAR* name, uint32_t argCount, VOID* arg1, VOID* arg2, VOID* arg3, VOID* arg4, VOID* arg5, VOID* arg6, VOID* arg7, VOID* arg8, VOID* arg9, VOID* arg10, VOID* arg11)
{
const size_t argsMax = LOGGED_ARGS_MAX;
VOID* args[argsMax] = { arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11 };
std::wstringstream ss;
ss << name << ":\n";
for (size_t i = 0; i < argCount && i < argsMax; i++) {
ss << "\tArg[" << i << "] = ";
ss << paramToStr(args[i]);
ss << "\n";
}
std::wstring argsLineW = ss.str();
std::string s(argsLineW.begin(), argsLineW.end());
traceLog.logLine(s);
}
VOID LogFunctionArgs(const ADDRINT Address, CHAR* name, uint32_t argCount, VOID* arg1, VOID* arg2, VOID* arg3, VOID* arg4, VOID* arg5, VOID* arg6, VOID* arg7, VOID* arg8, VOID* arg9, VOID* arg10, VOID* arg11)
{
if (argCount == 0) return;
PinLocker locker;
if (isWatchedAddress(Address) == WatchedType::NOT_WATCHED) return;
_LogFunctionArgs(Address, name, argCount, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11);
}
VOID MonitorFunctionArgs(IMG Image, const WFuncInfo& funcInfo)
{
const size_t argsMax = LOGGED_ARGS_MAX;
const CHAR* fName = funcInfo.funcName.c_str();
size_t argNum = funcInfo.paramCount;
if (argNum > argsMax) argNum = argsMax;
RTN funcRtn = find_by_unmangled_name(Image, fName);
if (!RTN_Valid(funcRtn) || !funcInfo.isValid()) return; // failed
std::cout << "Watch " << IMG_Name(Image) << ": " << fName << " [" << argNum << "]\n";
RTN_Open(funcRtn);
RTN_InsertCall(funcRtn, IPOINT_BEFORE, AFUNPTR(LogFunctionArgs),
IARG_RETURN_IP,
IARG_ADDRINT, fName,
IARG_UINT32, argNum,
IARG_FUNCARG_ENTRYPOINT_VALUE, 0,
IARG_FUNCARG_ENTRYPOINT_VALUE, 1,
IARG_FUNCARG_ENTRYPOINT_VALUE, 2,
IARG_FUNCARG_ENTRYPOINT_VALUE, 3,
IARG_FUNCARG_ENTRYPOINT_VALUE, 4,
IARG_FUNCARG_ENTRYPOINT_VALUE, 5,
IARG_FUNCARG_ENTRYPOINT_VALUE, 6,
IARG_FUNCARG_ENTRYPOINT_VALUE, 7,
IARG_FUNCARG_ENTRYPOINT_VALUE, 8,
IARG_FUNCARG_ENTRYPOINT_VALUE, 9,
IARG_FUNCARG_ENTRYPOINT_VALUE, 10,
IARG_END
);
RTN_Close(funcRtn);
}
DisasmCache m_disasmCache;
VOID LogInstruction(const CONTEXT* ctxt, THREADID tid, const char* disasm)
{
if (!disasm) return;