📄 Backdoor.Win32.Poison.jh MVID-2025-0704 Insecure Permissions

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2025
    Original source: https://malvuln.com/advisory/3d9821cbe836572410b3c5485a7f76ca.txt
    Malvuln Intelligence Feed: https://intel.malvuln.com/
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    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
    
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