Created
February 10, 2017 13:51
-
-
Save coldshell/8a19a90c038c6a79da6d10f5528908e1 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import idc | |
def decrypt_n_comment(func, func_name): | |
""" | |
Decrypt and comment Shamoon2's strings | |
""" | |
data = {} | |
for xref in XrefsTo(LocByName(func_name)): | |
# init | |
string_ea = search_inst(xref.frm, "push") | |
string_op = GetOperandValue(string_ea,0) | |
key_ea = PrevHead(string_ea) | |
key_op = GetOperandValue(key_ea,0) | |
# Call shamoon2's func | |
res = func(string_op, key_op) | |
# Refresh the memory for GetString function | |
idc.RefreshDebuggerMemory() | |
try: | |
# Add comments | |
MakeComm(string_ea, "key[0x{:X}] : '{:s}'".format(key_op, GetString(res,-1,ASCSTR_UNICODE))) | |
except: | |
continue | |
def search_inst(ea, inst): | |
""" | |
Find first instruction before the given ea | |
""" | |
while True: | |
if GetMnem(ea) == inst: | |
return ea | |
ea = PrevHead(ea) | |
# Initialization ------------------------------------------ | |
FUNC_NAME = "getStringW" | |
# Execution ----------------------------------------------- | |
decrypt_function = Appcall[FUNC_NAME] | |
decrypt_n_comment(decrypt_function, FUNC_NAME) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment