Overview

overview

10

Static

static

1

aed8a6b319...141.js

windows7-x64

10

aed8a6b319...141.js

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/09/2024, 15:52

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General

  • Target
    aed8a6b3191c2097fcbadb520f5d0f7e30b578c23f9abc0ab52b63bbb7abc141.js
  • Size 984KB
  • Sample240922-tbh4csxdrd
  • SHA256 aed8a6b3191c2097fcbadb520f5d0f7e30b578c23f9abc0ab52b63bbb7abc141
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
wshratexecutionpersistencetrojan

Malware Config

Extracted

Family

  • wshrat

C2

  • http://37.48.102.22:1820

Signatures

  • WSHRAT

    WSHRAT is a variant of Houdini worm and has vbs and js variants.

    trojanwshrat
  • Blocklisted process makes network request 31 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
    persistence
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Command and Scripting Interpreter: JavaScript 1 TTPs
    execution
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 2 IoCs
  • Runs .reg file with regedit 2 IoCs
  • Script User-Agent 25 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\aed8a6b3191c2097fcbadb520f5d0f7e30b578c23f9abc0ab52b63bbb7abc141.js
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1144
    • C:\Windows\regedit.exe
      "regedit.exe" "C:\Users\Admin\AppData\Local\Temp\ebgeaegdbdecaedfebace.reg"
      2⤵
      • Runs .reg file with regedit
      PID:4268
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\aed8a6b3191c2097fcbadb520f5d0f7e30b578c23f9abc0ab52b63bbb7abc141.js"
      2⤵
      • Blocklisted process makes network request
      • Checks computer location settings
      • Drops startup file
      • Adds Run key to start application
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:3996
      • C:\Windows\regedit.exe
        "regedit.exe" "C:\Users\Admin\AppData\Local\Temp\ebgeaegdbdecaedfebace.reg"
        3⤵
        • Runs .reg file with regedit
        PID:3428

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        ebgeaegdbdecaedfebace.reg
        • Path C:\Users\Admin\AppData\Local\Temp\ebgeaegdbdecaedfebace.reg
        • Size 143B
        • SHA256 cb68d50df5817e51ec5b2f72893dc4c749bf3504519107e0a78dda84d55f09e2
        • MD5 SHA1 SHA512
        Submit Download

        aed8a6b3191c2097fcbadb520f5d0f7e30b578c23f9abc0ab52b63bbb7abc141.js
        • Path C:\Users\Admin\AppData\Roaming\aed8a6b3191c2097fcbadb520f5d0f7e30b578c23f9abc0ab52b63bbb7abc141.js
        • Size 984KB
        • SHA256 aed8a6b3191c2097fcbadb520f5d0f7e30b578c23f9abc0ab52b63bbb7abc141
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download