Analysis

  • max time kernel
    149s
  • max time network
    179s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    18/10/2021, 07:20

General

  • Target

    PO 21.18.0047 -(APPROVAL).js

  • Size

    45KB

  • MD5

    8547af690a9b533d6acd08360f5b18d5

  • SHA1

    fe393629e5df70bcfef741a70432af6c6a528b27

  • SHA256

    e61713ffb39c48f5a162cbd0635b869bbd9b318ee3ac47a5a62490b572752b7a

  • SHA512

    7dcab08f69aaefd585a31cf3636a6fe252a9efa18dd5e587f269ea5ccb8648a5daaa4c9302bc2a22f35fe48ac590a07b1192d7aed7eb7b2badb801b39b37552d

Malware Config

Extracted

Family

wshrat

C2

http://jahblessrtd4ever.home-webserver.de:1604

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • WSHRAT

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

  • suricata: ET MALWARE WSHRAT CnC Checkin

    suricata: ET MALWARE WSHRAT CnC Checkin

  • suricata: ET MALWARE Worm.VBS Dunihi/Houdini/H-Worm Checkin 1

    suricata: ET MALWARE Worm.VBS Dunihi/Houdini/H-Worm Checkin 1

  • Blocklisted process makes network request 64 IoCs
  • Drops startup file 6 IoCs
  • Adds Run key to start application 2 TTPs 12 IoCs
  • 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 9 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe "C:\Users\Admin\AppData\Local\Temp\PO 21.18.0047 -(APPROVAL).js"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1720
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\sURhETJCuW.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      PID:596
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\PO 21.18.0047 -(APPROVAL).js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:1548
      • C:\Windows\System32\wscript.exe
        "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\sURhETJCuW.js"
        3⤵
        • Blocklisted process makes network request
        • Drops startup file
        • Adds Run key to start application
        PID:660

Network

MITRE ATT&CK Enterprise v6

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