Overview

overview

10

Static

static

InvoiceCopy.js

windows7_x64

10

InvoiceCopy.js

windows10_x64

10

Analysis

  • max time kernel
    145s
  • max time network
    145s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    02/06/2021, 13:40

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    InvoiceCopy.js
  • Size 240KB
  • Sample210602-ayfpc8yv42
  • SHA256 bae0b4ef7d96440a840c9d819d8f9ee9d4bcc7693fe59bf1aa5911112b505b75
  • MD5 SHA1 SHA512
Score
10/10
wshratpersistencetrojan

Malware Config

Signatures

  • WSHRAT

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

    trojanwshrat
  • Blocklisted process makes network request 27 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 4 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). Likely ransomware behaviour.

  • Kills process with taskkill 1 IoCs
    evasion
  • Script User-Agent 26 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\InvoiceCopy.js
    1⤵
    • Blocklisted process makes network request
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:4036
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c taskkill /F /IM kl-plugin.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2528
      • C:\Windows\system32\taskkill.exe
        taskkill /F /IM kl-plugin.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:2692
    • C:\Users\Admin\AppData\Local\Temp\kl-plugin.exe
      "C:\Users\Admin\AppData\Local\Temp\kl-plugin.exe" 194.5.98.96 5675 "WSHRAT|A2C56C1C|RJMQBVDN|Admin|Microsoft Windows 10 Enterprise|plus|nan-av|false - 2/6/2021|JavaScript-v2.0|NL:Netherlands" 1
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:3540

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/3540-119-0x0000000001140000-0x0000000001141000-memory.dmp
        Download