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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