Analysis

  • max time kernel
    148s
  • max time network
    146s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    10/10/2021, 11:51

General

  • Target

    3151f194fcfe3b210732d3f6bed59cbd.js

  • Size

    1.1MB

  • MD5

    3151f194fcfe3b210732d3f6bed59cbd

  • SHA1

    84d181e892c2c51d29c70daa7f785aa4b9a256bd

  • SHA256

    878057fe16a4f4bcdf4e3cf5e28c5e5686da8f24ebb03ced117b34a3f76571aa

  • SHA512

    0264ab652876cf84616e713e9e7709679e16a43a9d4d8b2624dc0dfe417eb21925a12f07ef2beff8e712570dc9e5a3777aaf221267abe8e977dde7eb64ac7024

Malware Config

Extracted

Family

wshrat

C2

http://gar373.ddns.net:3030

Signatures

  • WSHRAT

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

  • Blocklisted process makes network request 27 IoCs
  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 8 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Script User-Agent 26 IoCs

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

  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\3151f194fcfe3b210732d3f6bed59cbd.js
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:3704
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\3151f194fcfe3b210732d3f6bed59cbd.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      PID:1412

Network

MITRE ATT&CK Enterprise v6

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