Analysis

  • max time kernel
    120s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20240215-es
  • resource tags

    arch:x64arch:x86image:win7-20240215-eslocale:es-esos:windows7-x64systemwindows
  • submitted
    04/06/2024, 01:11

General

  • Target
    F0nts/DL/Winzip.exe
  • Size 3.2MB
  • Sample240604-bj9beagg28
  • SHA256 26b40c79356453c60498772423f99384a3d24dd2d0662d215506768cb9c58370
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 64 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 9 IoCs
  • Modifies system executable filetype association 2 TTPs 8 IoCs
  • Registers COM server for autorun 1 TTPs 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\F0nts\DL\Winzip.exe
    "C:\Users\Admin\AppData\Local\Temp\F0nts\DL\Winzip.exe"
    1⤵
    • Drops file in Program Files directory
    • Loads dropped DLL
    • Modifies Internet Explorer settings
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2240
    • C:\Program Files\WinRAR\uninstall.exe
      "C:\Program Files\WinRAR\uninstall.exe" /setup
      2⤵
      • Drops file in Program Files directory
      • Executes dropped EXE
      • Loads dropped DLL
      • Modifies system executable filetype association
      • Registers COM server for autorun
      • Modifies registry class
      PID:2796

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        Rar.txt

        • Path C:\Program Files\WinRAR\Rar.txt
        • Size 118KB
        • SHA256 8fe2e2987889f5f1c4ccc3ba6bf069ae35e5abf3c6a50d14e0e8b50dcff5108a
        • MD5 SHA1 SHA512 SSDEEP

        WhatsNew.txt

        • Path C:\Program Files\WinRAR\WhatsNew.txt
        • Size 129KB
        • SHA256 d573f277b0f1c92e96f5df7b1864dd1167b4ed4d32229822b6ff2b07ba78f062
        • MD5 SHA1 SHA512 SSDEEP

        WinRAR.chm

        • Path C:\Program Files\WinRAR\WinRAR.chm
        • Size 378KB
        • SHA256 f8cb67292cc4bde1cedd9cb5cd27e6dec21fd6a23e1c32a02f047ff55eff3823
        • MD5 SHA1 SHA512 SSDEEP

        WinRAR.exe

        • Path C:\Program Files\WinRAR\WinRAR.exe
        • Size 2.2MB
        • SHA256 b18c9b9200e354f81882b29dc8143ec5d6f2b731cf4c7da3800e339ffb3c8827
        • MD5 SHA1 SHA512 SSDEEP

        rarlng.dll

        • Path C:\Program Files\WinRAR\rarlng.dll
        • Size 955KB
        • SHA256 8c2a093eb8f7907ea928accbbbeb1531925b8f76adbd176364e4dcaff32d0ab2
        • MD5 SHA1 SHA512 SSDEEP

        Uninstall.exe

        • Path \Program Files\WinRAR\Uninstall.exe
        • Size 383KB
        • SHA256 c382b2af0e85b090333df7b7395d0022b9c5a4c026cf7761052128ed3ada5e0f
        • MD5 SHA1 SHA512 SSDEEP