Overview

overview

10

Static

static

1

SKM_C25820...057.js

windows7-x64

10

SKM_C25820...057.js

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-03-2024 16:57

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General

  • Target

    SKM_C258201001130020005057.js

  • Size

    27KB

  • MD5

    511f6a9de220c99adf7e2e03a4e48886

  • SHA1

    7e3c217e99f7bdd44c2e760feaf413cb3a7736fb

  • SHA256

    2a830c7923253031907c1dd34c4a9532c1f53e8fe7f6a3c8359a0e93ef4b216e

  • SHA512

    8fe6e672872a208e9cac950856c1afa4cdb7fc496cc67531a98322fed1f1b83b1b7b5ce7f5a702b56197c853f0bf09deb5e1958b4369ca01cb42c401fdb4c090

  • SSDEEP

    768:BIa7X/aqtEJfke022Fb+wGcrLQfpds+TbGKRRcpX:qabledke0HFbpGoLQfs+TbGORcpX

Score
10/10
vjw0rmpersistencetrojanworm

Malware Config

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

    trojanwormvjw0rm
  • Blocklisted process makes network request 12 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 3 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistence
  • Suspicious use of WriteProcessMemory 4 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.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:228
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\PhOPzJgSgd.js"
      2⤵
      • Drops startup file
      • Adds Run key to start application
      PID:900
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\SKM_C258201001130020005057.js
      2⤵
      • Creates scheduled task(s)
      PID:3436
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4036 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2232

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Roaming\PhOPzJgSgd.js
      Filesize

      8KB

      MD5

      398ea7fcde0fe6de66a488b8d0df37b3

      SHA1

      847de03f765f337624423386aa124e0910c22883

      SHA256

      9bfbb43d7401e73169d525c90feb26e4d968a301cb7f6045535c8025f780d731

      SHA512

      bc9a0491ea5c9f5aadb63e7a8811acebca4afeb9c1d76db985d2c7732c36ffe7e1fbb0cff970cabf51bc20db752cef847712b4147e8d0480014d1f7d3bb08111

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