Overview

overview

10

Static

static

394eb45c7d...585.js

windows7_x64

10

394eb45c7d...585.js

windows10-2004_x64

10

Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    05/02/2022, 16:48

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General

  • Target
    394eb45c7d10a3d6686877a28edb95258d04860ffe0bd246ed5fc181a6687585.js
  • Size 383KB
  • Sample220205-va3baaddd3
  • SHA256 394eb45c7d10a3d6686877a28edb95258d04860ffe0bd246ed5fc181a6687585
  • MD5 SHA1 SHA512
Score
10/10
wshratpersistencetrojan

Malware Config

Extracted

Family

  • wshrat

C2

  • http://pluginsrv2.duckdns.org:8000

Signatures

  • WSHRAT

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

    trojanwshrat
  • Blocklisted process makes network request 38 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 4 IoCs
  • Adds Run key to start application 2 TTPs 12 IoCs
    persistence
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

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

  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 47 IoCs
  • Script User-Agent 27 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\394eb45c7d10a3d6686877a28edb95258d04860ffe0bd246ed5fc181a6687585.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:772
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\ElITgiLwsl.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      PID:3548
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\394eb45c7d10a3d6686877a28edb95258d04860ffe0bd246ed5fc181a6687585.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:3132
      • C:\Windows\System32\wscript.exe
        "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\ElITgiLwsl.js"
        3⤵
          PID:1224
    • C:\Windows\system32\MusNotifyIcon.exe
      %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
      1⤵
      • Checks processor information in registry
      PID:1052
    • C:\Windows\System32\svchost.exe
      C:\Windows\System32\svchost.exe -k NetworkService -p
      1⤵
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      PID:1952

    Network

          MITRE ATT&CK Enterprise v6

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