Analysis

  • max time kernel
    15s
  • max time network
    20s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/03/2024, 17:45

General

  • Target

    strcomputer.vbs

  • Size

    2KB

  • MD5

    26b6d2fcf318aecf9df98d0f4705a671

  • SHA1

    1751305572fc3e87bdcf8f5a46fd45fee3a3830d

  • SHA256

    da372170c6fa0828db5e4fb5cf15749d09391b6f6b998dc6a27ecc68e26ff30a

  • SHA512

    46622857c48e01b8222eb0613b77d88155d17b8694e13b6edc3c8d88d6278104496680381d595a37ace5a18f71fe85c7405a866b3092d09618da4832da925784

Score
10/10

Malware Config

Signatures

  • UAC bypass 3 TTPs 1 IoCs
  • Disables Task Manager via registry modification
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\strcomputer.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3376
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /k C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4720
      • C:\Windows\System32\reg.exe
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        3⤵
        • UAC bypass
        • Modifies registry key
        PID:4960
    • C:\Windows\System32\taskkill.exe
      "C:\Windows\System32\taskkill.exe" /im cmd.exe
      2⤵
      • Kills process with taskkill
      • Suspicious use of AdjustPrivilegeToken
      PID:2212
  • C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\README.txt
    1⤵
    • Opens file in notepad (likely ransom note)
    PID:3260

Network

MITRE ATT&CK Enterprise v15

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Downloads