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Date: Thu, 5 May 2022 21:32:10 -0400
From: malvuln <>
Subject: [FD] Trojan-Ransom.LockerGoga / Code Execution

Discovery / credits: Malvuln - (John Page - aka hyp3rlinx) (c) 2022
Original source:

Threat: Trojan-Ransom.LockerGoga
Vulnerability: Code Execution
Description: LockerGoga 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. Four processes are created E.g.
"imtvknqq9737.exe" running under AppData\Local\Temp, the process name is
"imtvknqq" plus a appended random number. Our exploit dll will simply
display a Win32API message box and call exit(). The 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 malwares own flaw 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: LockerGoga
Type: PE32
MD5: 3b200c8173a92c94441cb062d38012f6
Vuln ID: MVID-2022-0587
Disclosure: 05/05/2022
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 then BOOM!

#include "windows.h"

//By malvuln - 5/2022
//Target: Trojan-Ransom.LockerGoga
//MD5: 3b200c8173a92c94441cb062d38012f6
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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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
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