Overview

overview

10

Static

static

10

Overdue Payment.js

windows7_x64

10

Overdue Payment.js

windows10_x64

10

Analysis

  • max time kernel
    153s
  • max time network
    156s
  • platform
    windows10_x64
  • resource
    win10-en
  • submitted
    15/09/2021, 09:07

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General

  • Target
    Overdue Payment.js
  • Size 204KB
  • Sample210915-k3m2ysach4
  • SHA256 7790518717f1e1c674361b4b26955a522541d6f56b73ad27bae7ec9f078c4ce3
  • 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
  • WSHRAT Payload 1 IoCs
  • Blocklisted process makes network request 34 IoCs
  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 8 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Script User-Agent 33 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\Overdue Payment.js"
    1⤵
    • Blocklisted process makes network request
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:4688
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\Overdue Payment.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      PID:4744

Network

        MITRE ATT&CK Enterprise v6

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