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| 'use strict';
const logFilePath = "./log.txt";
const logFile = new File(logFilePath, "w");
function logLine(s) {
logFile.write(s + "\n");
logFile.flush();
console.log(s);
}
function findPythonModule() {
const mods = Process.enumerateModulesSync();
for (const m of mods) {
const n = m.name.toLowerCase();
if (n.startsWith('python3') && n.endsWith('.dll')) return m;
if (n.startsWith('python') && n.endsWith('.dll')) return m;
}
throw new Error('python3*.dll not found. Use: frida -f python.exe -l hook_number_compare.js');
}
const pymod = findPythonModule();
logLine('[*] using python module: ' + pymod.name + ' ' + pymod.base);
function exp(name) {
try {
const addr = Module.getExportByName(pymod.name, name);
logLine(`[+] export ${name} => ${addr}`);
return addr;
} catch (e) {
logLine(`[-] export ${name} not found`);
return null;
}
}
const symbols = {
PyUnicode_AsUTF8: exp('PyUnicode_AsUTF8'),
PyObject_Repr: exp('PyObject_Repr'),
PyObject_Str: exp('PyObject_Str'),
PyLong_Check: exp('PyLong_Check'),
PyLong_AsLongLong: exp('PyLong_AsLongLong'),
PyLong_AsUnsignedLongLongMask: exp('PyLong_AsUnsignedLongLongMask'),
PyLong_FromString: exp('PyLong_FromString'),
PyLong_FromUnicodeObject: exp('PyLong_FromUnicodeObject'),
PyNumber_Add: exp('PyNumber_Add'),
PyNumber_InPlaceAdd: exp('PyNumber_InPlaceAdd'),
PyNumber_Subtract: exp('PyNumber_Subtract'),
PyNumber_Multiply: exp('PyNumber_Multiply'),
PyNumber_And: exp('PyNumber_And'),
PyNumber_Or: exp('PyNumber_Or'),
PyNumber_Xor: exp('PyNumber_Xor'),
PyNumber_Lshift: exp('PyNumber_Lshift'),
PyNumber_Rshift: exp('PyNumber_Rshift'),
PyNumber_InPlaceRshift: exp('PyNumber_InPlaceRshift'),
PyNumber_Power: exp('PyNumber_Power'),
PyNumber_Remainder: exp('PyNumber_Remainder'),
PyNumber_Index: exp('PyNumber_Index'),
PyObject_RichCompare: exp('PyObject_RichCompare'),
PyObject_RichCompareBool: exp('PyObject_RichCompareBool')
};
function tryCreateNativeFunction(addr, retType, argTypes, friendlyName) {
if (!addr) return null;
try {
const nf = new NativeFunction(addr, retType, argTypes);
logLine(`[+] NativeFunction created for ${friendlyName}`);
return nf;
} catch (e) {
logLine(`[-] Failed creating NativeFunction for ${friendlyName}: ${e.message}`);
return null;
}
}
const PyUnicode_AsUTF8 = tryCreateNativeFunction(symbols.PyUnicode_AsUTF8, 'pointer', ['pointer'], 'PyUnicode_AsUTF8');
const PyObject_Repr = tryCreateNativeFunction(symbols.PyObject_Repr, 'pointer', ['pointer'], 'PyObject_Repr');
const PyObject_Str = tryCreateNativeFunction(symbols.PyObject_Str, 'pointer', ['pointer'], 'PyObject_Str');
const PyLong_Check = tryCreateNativeFunction(symbols.PyLong_Check, 'int', ['pointer'], 'PyLong_Check');
const PyLong_AsLongLong = tryCreateNativeFunction(symbols.PyLong_AsLongLong, 'int64', ['pointer'], 'PyLong_AsLongLong');
const PyLong_AsUnsignedLongLongMask = tryCreateNativeFunction(symbols.PyLong_AsUnsignedLongLongMask, 'uint64', ['pointer'], 'PyLong_AsUnsignedLongLongMask');
function toHexFixed(num, width = 8) {
try {
let big;
if (typeof num === 'bigint') big = num;
else if (typeof num === 'number') big = BigInt(num >>> 0);
else if (typeof num === 'string') {
if (/^0x[0-9a-fA-F]+$/.test(num)) big = BigInt(num);
else if (/^-?\d+$/.test(num)) {
big = BigInt(num);
if (big < 0n) {
const bits = BigInt(width * 4);
big = (big & ((1n << bits) - 1n));
}
} else return num;
} else return `<hex error: ${typeof num}>`;
let hex = big.toString(16);
if (hex.length < width) hex = hex.padStart(width, '0');
return '0x' + hex;
} catch (e) {
return `<hex error: ${e.message}>`;
}
}
function isDecimalString(s) {
return typeof s === 'string' && /^-?\d+$/.test(s);
}
function isHexString(s) {
return typeof s === 'string' && /^0x[0-9a-fA-F]+$/.test(s);
}
function formatForLogging(s, width = 8) {
if (s === undefined || s === null) return s;
if (isHexString(s)) return s;
if (isDecimalString(s)) return toHexFixed(s, width);
const m = /(-?\d+)$/.exec(String(s).trim());
if (m) return toHexFixed(m[1], width);
return s;
}
function safeUtf8FromPyStr(pyStrPtr) {
if (!pyStrPtr || pyStrPtr.isNull()) return '<utf8 NULL>';
try {
if (!PyUnicode_AsUTF8) return '<no PyUnicode_AsUTF8>';
const cstr = PyUnicode_AsUTF8(pyStrPtr);
if (cstr.isNull()) return '<utf8 NULL>';
return Memory.readUtf8String(cstr);
} catch {
return '<utf8 read error>';
}
}
function objToStr(pyObjPtr) {
if (!pyObjPtr || pyObjPtr.isNull()) return '<NULL>';
try {
if (PyLong_Check) {
const isLong = PyLong_Check(pyObjPtr);
if (isLong === 1) {
if (PyLong_AsUnsignedLongLongMask) {
const u = PyLong_AsUnsignedLongLongMask(pyObjPtr);
return toHexFixed(u);
}
if (PyLong_AsLongLong) {
const v = PyLong_AsLongLong(pyObjPtr);
return toHexFixed(v);
}
}
}
if (PyObject_Str) {
const sObj = PyObject_Str(pyObjPtr);
if (sObj && !sObj.isNull()) return safeUtf8FromPyStr(sObj);
}
if (PyObject_Repr) {
const r = PyObject_Repr(pyObjPtr);
if (r && !r.isNull()) return safeUtf8FromPyStr(r);
}
return '<unrepresentable>';
} catch (e) {
return `<repr error: ${e.message}>`;
}
}
if (symbols.PyLong_FromUnicodeObject) {
Interceptor.attach(symbols.PyLong_FromUnicodeObject, {
onEnter(args) {
this.sRaw = objToStr(args[0]);
this.base = args[1].toInt32();
},
onLeave(retval) {
const got = objToStr(retval);
logLine(`[PyLong_FromUnicodeObject] int(s, base=${this.base}) s=${this.sRaw} -> ${formatForLogging(got)}`);
}
});
}
if (symbols.PyLong_FromString) {
Interceptor.attach(symbols.PyLong_FromString, {
onEnter(args) {
try { this.s = Memory.readUtf8String(args[0]); } catch (e) { this.s = '<read error>'; }
this.base = args[2].toInt32();
},
onLeave(retval) {
const got = objToStr(retval);
logLine(`[PyLong_FromString] int(s, base=${this.base}) s=${this.s} -> ${formatForLogging(got)}`);
}
});
}
function symbolFor(name) {
const map = {
PyNumber_Add: '+',
PyNumber_InPlaceAdd: '+=',
PyNumber_Subtract: '-',
PyNumber_Multiply: '*',
PyNumber_And: '&',
PyNumber_Or: '|',
PyNumber_Xor: '^',
PyNumber_Lshift: '<<',
PyNumber_Rshift: '>>',
PyNumber_InPlaceRshift: '>>=',
PyNumber_Power: '**',
PyNumber_Remainder: '%',
PyNumber_Index: 'index'
};
return map[name] || '?';
}
function hookPyNumber(name, ptr) {
if (!ptr) return;
Interceptor.attach(ptr, {
onEnter(args) {
this.aPtr = args[0];
this.bPtr = args[1];
this.aRaw = objToStr(this.aPtr);
this.bRaw = objToStr(this.bPtr);
this.a = formatForLogging(this.aRaw, 8);
this.b = formatForLogging(this.bRaw, 8);
try {
this.cPtr = args[2];
if (this.cPtr && !this.cPtr.isNull()) {
this.cRaw = objToStr(this.cPtr);
this.c = formatForLogging(this.cRaw, 8);
} else {
this.cPtr = null;
this.cRaw = null;
this.c = null;
}
} catch (e) {
this.cPtr = null;
this.cRaw = null;
this.c = null;
}
},
onLeave(retval) {
let aStr = this.aRaw.length > 32 ? "num" : this.a;
let bStr = this.bRaw.length > 32 ? "num" : this.b;
const outRaw = objToStr(retval);
let outFmt = outRaw.length > 32 ? "num" : formatForLogging(outRaw, 8);
if (name === 'PyNumber_Power') {
let modStr = this.c ? (this.cRaw.length > 32 ? "num" : this.c) : "None";
logLine(`[${name}] pow(${aStr}, ${bStr}, ${modStr}) = ${outFmt}`);
return;
}
logLine(`[${name}] ${aStr} ${symbolFor(name)} ${bStr} = ${outFmt}`);
}
});
}
[
'PyNumber_Add',
'PyNumber_InPlaceAdd',
'PyNumber_Subtract',
'PyNumber_Multiply',
'PyNumber_And',
'PyNumber_Or',
'PyNumber_Xor',
'PyNumber_Lshift',
'PyNumber_Rshift',
'PyNumber_InPlaceRshift',
'PyNumber_Remainder',
'PyNumber_Index',
'PyNumber_Power'
].forEach(n => hookPyNumber(n, symbols[n]));
const cmpOps = ['<', '<=', '==', '!=', '>', '>='];
if (symbols.PyObject_RichCompareBool) {
Interceptor.attach(symbols.PyObject_RichCompareBool, {
onEnter(args) {
this.ptrA = args[0];
this.ptrB = args[1];
this.op = args[2].toInt32();
this.aRaw = objToStr(this.ptrA);
this.bRaw = objToStr(this.ptrB);
this.a = formatForLogging(this.aRaw, 8);
this.b = formatForLogging(this.bRaw, 8);
},
onLeave(retval) {
const opStr = cmpOps[this.op] || `op(${this.op})`;
if (this.ptrA.equals(this.ptrB)) return;
if (this.aRaw === this.bRaw && this.op === 2) return;
logLine(`[CompareBool] ${this.a} ${opStr} ${this.b} -> ${retval.toInt32()}`);
}
});
}
if (symbols.PyObject_RichCompare) {
Interceptor.attach(symbols.PyObject_RichCompare, {
onEnter(args) {
this.aRaw = objToStr(args[0]);
this.bRaw = objToStr(args[1]);
this.op = args[2].toInt32();
this.a = formatForLogging(this.aRaw, 8);
this.b = formatForLogging(this.bRaw, 8);
},
onLeave(retval) {
logLine(`[CompareObj] ${this.a} ${cmpOps[this.op]} ${this.b} -> ${objToStr(retval)}`);
}
});
}
logLine(`\n✅ Hooks installed on ${pymod.name}`);
logLine(`🧮 PyNumber_* operations + Compare ops are now being traced in HEX...\n`);
|
