Overview

overview

10

Static

static

1

05212023840.js

windows7-x64

10

05212023840.js

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/05/2023, 08:50

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General

  • Target
    05212023840.js
  • Size 1.0MB
  • Sample230522-krm8ksfb74
  • SHA256 b32f3e7d67e21bf2d40dec620a6f2a1b471847af427f924ed28b72633b9b6c40
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
wshratpersistencetrojan

Malware Config

Extracted

Family

  • wshrat

C2

  • http://45.90.222.125:7121

Signatures

  • WSHRAT

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

    trojanwshrat
  • Blocklisted process makes network request 19 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 8 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Script User-Agent 15 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\05212023840.js
    1⤵
    • Blocklisted process makes network request
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1668
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\05212023840.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      PID:4740

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        05212023840.js
        • Path C:\Users\Admin\AppData\Roaming\05212023840.js
        • Size 1.0MB
        • SHA256 b32f3e7d67e21bf2d40dec620a6f2a1b471847af427f924ed28b72633b9b6c40
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        05212023840.js
        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\05212023840.js
        • Size 64KB
        • SHA256 de2f256064a0af797747c2b97505dc0b9f3df0de4f489eac731c23ae9ca9cc31
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        05212023840.js
        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\05212023840.js
        • Size 1.0MB
        • SHA256 b32f3e7d67e21bf2d40dec620a6f2a1b471847af427f924ed28b72633b9b6c40
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download