📄 HEUR.Backdoor.Win32.Poison.gen MVID-2025-0701 DLL Hijacking

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2025
    Original source: https://malvuln.com/advisory/b2e50fa38510a5ea8e11f614b1c1d0d5.txt
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    Threat: HEUR.Backdoor.Win32.Poison.gen
    Vulnerability: Arbitrary Code Execution
    Description: The malware looks for and executes a x32-bit "WININET.dll" PE file in its current directory. Therefore, we can hijack the DLL and execute our own code to intercept and terminate the malware. Leverage RansomLordNG v1.0 for DLL generation, while written as a proof-of-concept to specifically defeat ransomware, these DLLs may also defeat other types of malware if vulnerable. All basic tests were conducted successfully in a virtual machine environment. RansomLordNG v1.0 currently includes enhanced logging, memory dump and deweaponize features.
    Family: Poison
    Type: PE32
    Attack-pattern TTP: Hijack Execution Flow (T1574)
    MD5: b2e50fa38510a5ea8e11f614b1c1d0d5
    SHA256: 0de336f07cc19a6fda4cf9dacf1c4be0c6fb17158182d5274355cffa494ac8ed
    Vuln ID: MVID-2025-0701
    Disclosure: 12/20/2025
    Exploit/PoC:
    1) Download RansomLordNG v1.0
        https://github.com/malvuln/RansomLord
    2) Locate the x32 WININET.dll entry using the -m flag (DLL Map)
    3) Use -g flag (Generate Exploit) to output an DLL, based on an existing vulnerable malware in the victims list.
    4) (Optional) -e flag to setup Windows event IOC logging in the registry, this will log the SHA256 hash, full path and filename.
    
    
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