Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2025 Original source: https://malvuln.com/advisory/3d9821cbe836572410b3c5485a7f76ca.txt Malvuln Intelligence Feed: https://intel.malvuln.com/ Contact: [email protected] Media: x.com/malvuln Threat: Backdoor.Win32.Poison.jh Vulnerability: Insecure Permissions Description: The malware creates the directory 28463 under C:\Windows\SysWOW64, granting Full (F) permissions to the Everyone user group. This allows any local user to modify or replace any dropped files, enabling trivial malware disruption or execution hijacking. This reflects poor operational security exposing malware components to local tampering. Family: Poison Type: PE32 Attack-pattern TTP: File and Directory Permissions Modification (T1222.001) MD5: 3d9821cbe836572410b3c5485a7f76ca SHA256: 2229d26afafb4b7fe1eaaa92ce1251c00eda9bac3f1371c470e7bbd5ae0a5bf9 Vuln ID: MVID-2025-0704 Dropped files: YJBE.exe Disclosure: 12/23/2025 Exploit/PoC: C:\>cacls C:\Windows\SysWOW64\28463\YJBE.exe C:\Windows\SysWOW64\28463\YJBE.exe Everyone:(ID)F 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).