특정 클래스를 입력하면, 해당 클래스 실행 시 사용되는 메소드와 리턴 값등을 확인할 수 있다.
// generic trace
function trace(pattern)
{
var type = (pattern.indexOf(" ") === -1) ? "module" : "objc"; // [A B]와 같이 공백이 있으면 objc, 없으면 모듈
var res = new ApiResolver(type);
var matches = res.enumerateMatchesSync(pattern);
var targets = uniqBy(matches, JSON.stringify);
targets.forEach(function(target) {
if (type === "objc")
traceObjC(target.address, target.name);
else if (type === "module")
traceModule(target.address, target.name);
});
}
// remove duplicates from array
function uniqBy(array, key)
{
var seen = {};
return array.filter(function(item) {
var k = key(item);
return seen.hasOwnProperty(k) ? false : (seen[k] = true);
});
}
// trace ObjC methods
function traceObjC(impl, name)
{
console.log("Tracing " + name);
Interceptor.attach(impl, {
onEnter: function(args) {
// debug only the intended calls
this.flag = 0;
// if (ObjC.Object(args[2]).toString() === "1234567890abcdef1234567890abcdef12345678")
this.flag = 1;
if (this.flag) {
console.warn("\n[+] entered " + name);
// print caller
console.log("\x1b[31mCaller:\x1b[0m \x1b[34m" + DebugSymbol.fromAddress(this.returnAddress) + "\x1b[0m\n");
// print args
console.log("\x1b[31margs[2]:\x1b[0m \x1b[34m" + args[2] + ", \x1b[32m" + ObjC.Object(args[2]) + "\x1b[0m")
console.log("\x1b[31margs[3]:\x1b[0m \x1b[34m" + args[3] + ", \x1b[32m" + ObjC.Object(args[3]) + "\x1b[0m")
// console.log("\x1b[31margs[4]:\x1b[0m \x1b[34m" + args[4] + ", \x1b[32m" + ObjC.Object(args[4]) + "\x1b[0m")
// print full backtrace
// console.log("\nBacktrace:\n" + Thread.backtrace(this.context, Backtracer.ACCURATE)
// .map(DebugSymbol.fromAddress).join("\n"));
}
},
onLeave: function(retval) {
if (this.flag) {
// print retval
console.log("\n\x1b[31mretval:\x1b[0m \x1b[34m" + retval + "\x1b[0m");
console.warn("[-] exiting " + name);
}
}
});
}
// trace Module functions
function traceModule(impl, name)
{
console.log("Tracing " + name);
Interceptor.attach(impl, {
onEnter: function(args) {
// debug only the intended calls
this.flag = 0;
// var filename = Memory.readCString(ptr(args[0]));
// if (filename.indexOf("Bundle") === -1 && filename.indexOf("Cache") === -1) // exclusion list
// if (filename.indexOf("my.interesting.file") !== -1) // inclusion list
this.flag = 1;
if (this.flag) {
console.warn("\n*** entered " + name);
// print backtrace
console.log("\nBacktrace:\n" + Thread.backtrace(this.context, Backtracer.ACCURATE)
.map(DebugSymbol.fromAddress).join("\n"));
}
},
onLeave: function(retval) {
if (this.flag) {
// print retval
console.log("\nretval: " + retval);
console.warn("\n*** exiting " + name);
}
}
});
}
// usage examples. 관심있는 클래스를 명시. 대소문자 구분
if (ObjC.available) {
trace("*[DVIA_v2.TouchIDDetailsViewController *]")
// trace("*[JailbreakDetection *]")
// trace("*[FireflySecurityUtil *]")
// trace("*[ *ncrypt*]");
// trace("*[* *]"); 모든 클래스 추적. 앱이 다운됨
// trace("exports:libSystem.B.dylib!CCCrypt");
// trace("exports:libSystem.B.dylib!open");
// trace("exports:*!open*");
} else {
send("error: Objective-C Runtime is not available!");
}
JavaScript
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