Overview

overview

10

Static

static

RFQ.js

windows7-x64

10

RFQ.js

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/10/2022, 09:37

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General

  • Target
    RFQ.js
  • Size 38KB
  • Sample221025-llhatacbg9
  • SHA256 e129f1f9e9b65e0f740decd35719b12553aafe2a0869b1d0e73a40014770ea3a
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
vjw0rmwshratpersistencetrojanworm

Malware Config

Extracted

Family

  • wshrat

C2

  • http://harold.jetos.com:1604

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

    trojanwormvjw0rm
  • WSHRAT

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

    trojanwshrat
  • Blocklisted process makes network request 41 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 5 IoCs
  • Adds Run key to start application 2 TTPs 8 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Script User-Agent 29 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\RFQ.js
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:448
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\yxlCSUZAlT.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      PID:4240
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\RFQ.js"
      2⤵
      • Blocklisted process makes network request
      • Checks computer location settings
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:1144
      • C:\Windows\System32\wscript.exe
        "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\yxlCSUZAlT.js"
        3⤵
        • Blocklisted process makes network request
        • Drops startup file
        PID:632

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        RFQ.js
        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RFQ.js
        • Size 38KB
        • SHA256 e129f1f9e9b65e0f740decd35719b12553aafe2a0869b1d0e73a40014770ea3a
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        yxlCSUZAlT.js
        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yxlCSUZAlT.js
        • Size 5KB
        • SHA256 c6d77921efc5ace10840a3c3f08742d02509ebec29a21f9d253269443a85b76b
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        RFQ.js
        • Path C:\Users\Admin\AppData\Roaming\RFQ.js
        • Size 38KB
        • SHA256 e129f1f9e9b65e0f740decd35719b12553aafe2a0869b1d0e73a40014770ea3a
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        yxlCSUZAlT.js
        • Path C:\Users\Admin\AppData\Roaming\yxlCSUZAlT.js
        • Size 5KB
        • SHA256 c6d77921efc5ace10840a3c3f08742d02509ebec29a21f9d253269443a85b76b
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        yxlCSUZAlT.js
        • Path C:\Users\Admin\AppData\Roaming\yxlCSUZAlT.js
        • Size 5KB
        • SHA256 c6d77921efc5ace10840a3c3f08742d02509ebec29a21f9d253269443a85b76b
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download