Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-11-2022 06:42

General

  • Target

    PO.js

  • Size

    24KB

  • MD5

    963ca126766bbcd9e8384b9ef2c74673

  • SHA1

    59ac9982bde3dcf4d4a89e99b8ab08fedce02ba5

  • SHA256

    7549db05702b59ca48c9faaab687273bbe8abad0c8d27540ca89f63ed3c9ed5a

  • SHA512

    0df472aa3d72ab2cb7269eb55c3b4a05a3b654a280ccec9f5bd10f6dca07d98ea9c3cb0be101fa5ad973fa718e16c0605ac4a4d8e94952b18140f4c9394d2480

  • SSDEEP

    384:Aq0a8IOmVLZAQOksb6frbfRHdBtvhaI4JX1w6nofZMCaZQzun4Gg6O3JoYiXP3sw:ANIOU7smvgISofbNOaJEvcQF

Malware Config

Extracted

Family

wshrat

C2

http://212.193.30.230:7780

Signatures

  • WSHRAT

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

  • Blocklisted process makes network request 26 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
  • Enumerates physical storage devices 1 TTPs

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

  • Script User-Agent 25 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\PO.js
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:4816
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\PO.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      PID:2120

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PO.js

    Filesize

    24KB

    MD5

    963ca126766bbcd9e8384b9ef2c74673

    SHA1

    59ac9982bde3dcf4d4a89e99b8ab08fedce02ba5

    SHA256

    7549db05702b59ca48c9faaab687273bbe8abad0c8d27540ca89f63ed3c9ed5a

    SHA512

    0df472aa3d72ab2cb7269eb55c3b4a05a3b654a280ccec9f5bd10f6dca07d98ea9c3cb0be101fa5ad973fa718e16c0605ac4a4d8e94952b18140f4c9394d2480

  • C:\Users\Admin\AppData\Roaming\PO.js

    Filesize

    24KB

    MD5

    963ca126766bbcd9e8384b9ef2c74673

    SHA1

    59ac9982bde3dcf4d4a89e99b8ab08fedce02ba5

    SHA256

    7549db05702b59ca48c9faaab687273bbe8abad0c8d27540ca89f63ed3c9ed5a

    SHA512

    0df472aa3d72ab2cb7269eb55c3b4a05a3b654a280ccec9f5bd10f6dca07d98ea9c3cb0be101fa5ad973fa718e16c0605ac4a4d8e94952b18140f4c9394d2480