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Frida script to spawn a process and monitor Native API calls
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import frida | |
import sys | |
def on_message(message, data): | |
if message['type'] == 'send': | |
print(message['payload']) | |
elif message['type'] == 'error': | |
print(message['stack']) | |
else: | |
print(message) | |
pid = frida.spawn("C:\Temp\stage0.exe") | |
session = frida.attach(pid) | |
script = """ | |
var pNtAllocateVirtualMemory = Module.findExportByName("ntdll.dll", 'NtAllocateVirtualMemory') | |
Interceptor.attach(pNtAllocateVirtualMemory, { | |
onEnter: function (args) { | |
this.ProcessHandle = args[0]; | |
this.BaseAddress = args[1]; | |
this.ZeroBits = args[2]; | |
this.RegionSize = args[3]; | |
this.AllocationType = args[4]; | |
this.Protect = args[5]; | |
}, | |
onLeave: function (args) { | |
if(!(this.ProcessHandle == 0xffffffff || this.ProcessHandle == 0xffffffffffffffff)){ | |
send("[-] I saw you call NtAllocateVirtualMemory"); | |
send("Process Handle: " + this.ProcessHandle); | |
send("BaseAddress: " + this.BaseAddress); | |
send("ZeroBits: " + this.ZeroBits); | |
send("RegionSize: " + this.RegionSize); | |
send("AllocationType: " + this.AllocationType); | |
send("Protect: " + this.Protect); | |
} | |
} | |
}); | |
var pNtWriteVirtualMemory = Module.findExportByName("ntdll.dll", 'NtWriteVirtualMemory') | |
Interceptor.attach(pNtWriteVirtualMemory, { | |
onEnter: function (args) { | |
this.Handle = args[0]; | |
this.BaseAddress = args[1]; | |
this.Buffer = args[2]; | |
this.NumberOfBytesToWrite = args[3]; | |
this.NumberOfBytesWritten = args[4]; | |
}, | |
onLeave: function (args) { | |
if(!(this.Handle == 0xffffffff)){ | |
send("[-] I saw you call NtWriteVirtualMemory"); | |
send("Handle: " + this.Handle); | |
send("BaseAddress: " + this.BaseAddress); | |
send("Buffer: " + this.Buffer); | |
send("NumberOfBytesToWrite: " + this.NumberOfBytesToWrite); | |
send("NumberOfBytesWritten: " + this.NumberOfBytesWritten); | |
} | |
} | |
}); | |
""" | |
script = session.create_script(script) | |
frida.resume(pid) | |
script.on('message', on_message) | |
script.load() | |
try: | |
while True: | |
pass | |
except KeyboardInterrupt: | |
session.detach() | |
sys.exit(0) |
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