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Date: Mon, 2 May 2022 23:21:36 -0400
From: malvuln <>
Subject: [FD] BlackBasta Ransom / Code Execution

Discovery / credits: Malvuln - (c) 2022
Original source:

Threat: BlackBasta Ransom
Vulnerability: Code Execution
Description: BlackBasta looks for and loads a DLL named "wow64log.dll" in
Windows\System32. Therefore, we can drop our own DLL to intercept and
terminate the malware pre-encryption. The exploit dll will simply display a
Win32API message box and call exit(). Our BlackBasta exploit DLL must
export "InterlockedExchange" function or it fails with error. We do not
need to rely on hash signature or third-party product, the malware will do
the work for us. Endpoint protection systems and or antivirus can
potentially be killed prior to executing malware, but this method cannot as
theres nothing to kill the DLL just lives on disk waiting. From defensive
perspective you can add the DLLs to a specific network share containing
important data as a layered approach. All basic tests were conducted
successfully in a virtual machine environment.
Family: BlackBasta
Type: PE32
MD5: 998022b70d83c6de68e5bdf94e0f8d71
Vuln ID: MVID-2022-0574
Disclosure: 05/02/2022
Video PoC URL:

1) Compile the following C code as "wow64log.dll" as x64
2) Place the DLL in Windows/System32
3) Run the malware and BOOM!

#include "windows.h"
#include "stdio.h"

//By malvuln - 5/2022
//Target: BlackBasta Ransom
//MD5: 998022b70d83c6de68e5bdf94e0f8d71
Author is NOT responsible for any damages whatsoever by using this software
or improper malware
handling. By using this code you assume and accept all risk implied or

//compile as x64
//gcc -c wow64log.c
//gcc -shared -o wow64log.dll wow64log.o
//DLL must live under Windows/System32 dir

BOOL APIENTRY DllMain(HINSTANCE hInst, DWORD reason, LPVOID reserved){
  switch (reason) {
   MessageBox(NULL, "Code Exec", "by malvuln", MB_OK);
  return TRUE;

extern __declspec(dllexport) WINBASEAPI LONG WINAPI InterlockedExchange
(LONG volatile *Target, LONG Value){

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provided that it is not altered except by reformatting it, and that due
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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
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