Vulnerabilities

Ransom.Satana Code Execution

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source: https://malvuln.com/advisory/46bfd4f1d581d7c0121d2b19a005d3df.txt
Contact: malvuln13@gmail.com
Media Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source: https://malvuln.com/advisory/46bfd4f1d581d7c0121d2b19a005d3df.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Ransom.Satana
Vulnerability: Code Execution
Description: Satana searches for and loads a DLL named "wow64log.dll" in WindowsSystem32. 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(). 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: Satana
Type: PE32
MD5: 46bfd4f1d581d7c0121d2b19a005d3df
Vuln ID: MVID-2022-0593
Disclosure: 05/07/2022
Video PoC URL: https://www.youtube.com/watch?v=AkuqcPZbah8

Exploit/PoC:
1) Compile the following C code as "wow64log.dll" as x64
2) Place the DLL in WindowsSystem32
3) Run the malware

#include "windows.h"

//By malvuln
//Purpose: Exploit Satana
//MD5: 46bfd4f1d581d7c0121d2b19a005d3df
/** DISCLAIMER:
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 otherwise.
**/

//compile as x64
//gcc -c wow64log.c
//gcc -shared -o wow64log.dll wow64log.o
//DLL must live under WindowsSystem32 dir

BOOL APIENTRY DllMain(HINSTANCE hInst, DWORD reason, LPVOID reserved){
switch (reason) {
case DLL_PROCESS_ATTACH:
MessageBox(NULL, "Code Exec", "by malvuln", MB_OK);
exit(0);
break;
}
return TRUE;
}

extern __declspec(dllexport) WINBASEAPI LONG WINAPI InterlockedExchange (LONG volatile *Target, LONG Value){
exit(1);
}


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