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@Inndy
Forked from alexander-hanel/nemty_str_decoder.py
Created February 25, 2021 06:29
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IDAPython script for decoding strings in nemty
import base64
from Crypto.Cipher import ARC4
def str_decrypt(enc_data):
key = 'fuckav\x00'
cipher = ARC4.new(key)
try:
enc_data = base64.b64decode(enc_data)
except:
return enc_data
return cipher.decrypt(enc_data)
for xref in CodeRefsTo(0x407395, 0):
args = idaapi.get_arg_addrs(xref)
if args:
arg_offset = args[0]
enc_offset = idc.get_operand_value(arg_offset, 0)
enc_data = idc.get_strlit_contents(enc_offset)
if enc_data:
dec_str = str_decrypt(enc_data)
idc.set_cmt(enc_offset, dec_str, 0)
print dec_str, hex(enc_offset)[:-1], hex(xref)[:-1], enc_data
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