Ransom Lockbit 3.0 MVID-2022-0621 Code Execution

CVE Category Price Severity
CVE-2022-0621 CWE-119 Unknown High
Author Risk Exploitation Type Date
Unknown High Remote 2022-07-08
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N 0.02192 0.50148

CVSS vector description

Our sensors found this exploit at:

Below is a copy:

Ransom Lockbit 3.0 MVID-2022-0621 Code Execution
Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source:
Contact: [email protected]

Threat: Ransom Lockbit 3.0 
Vulnerability: Code Execution
Description: The ransomware apparently now requires a password to execute as noted by "@vxunderground" E.g. "-pass db66023ab2abcb9957fb01ed50cdfa6a". Lockbit looks for and executes DLLs in its current directory. Therefore, we can hijack a vuln DLL in this case "RstrtMgr.dll", execute our own code and terminate the malware pre-encryption. The exploit dll checks if the current directory is "C:\Windows\System32", if not we grab our process ID and terminate. All basic tests were conducted successfully in a virtual machine environment.
Family: Lockbit
Type: PE32
MD5: 38745539b71cf201bb502437f891d799
Vuln ID: MVID-2022-0621
Disclosure: 07/04/2022
Video PoC URL:

1) Compile the following C code as "RstrtMgr.dll"
2) Place the DLL in same directory as Lockbit 3.0
3) Optional - Hide it: attrib +s +h "RstrtMgr.dll"
4) Run Lockbit 3.0 {04830965-76E6-6A9A-8EE1-6AF7499C1D08}.exe -k LocalServiceNetworkRestricted -pass db66023ab2abcb9957fb01ed50cdfa6a

#include "windows.h"

//By malvuln - 7/4/2022
//Purpose: RCE in Lockbit 3.0 ransomware
//MD5: 38745539b71cf201bb502437f891d799
//gcc -c RstrtMgr.c -m32
//gcc -shared -o RstrtMgr.dll RstrtMgr.o -m32
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.
BOOL APIENTRY DllMain(HINSTANCE hInst, DWORD reason, LPVOID reserved){
  switch (reason) {
   MessageBox(NULL, "Ransom Lockbit 3.0 aka LockShit\nPWNED by Malvuln", "Code Exec PoC", MB_OK);
   if(GetCurrentDirectory(MAX_PATH, buf))
   if(strcmp("C:\\Windows\\System32", buf) != 0){
    HANDLE handle = OpenProcess(PROCESS_TERMINATE, FALSE, getpid());
     if (NULL != handle) {   
        TerminateProcess(handle, 0);
  return TRUE;

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