Analysis

  • max time kernel
    143s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-05-2024 16:47

General

  • Target

    2024-05-01_539f98766e72c79cf514f2e66cd31e14_cryptolocker.exe

  • Size

    67KB

  • MD5

    539f98766e72c79cf514f2e66cd31e14

  • SHA1

    1b0dc52cd0b906904cb8ec8b239c2b165171f0d6

  • SHA256

    da57d7c404ed8da4a63858585398d8d273e5ea84544c96c9a62e0a43e6225b04

  • SHA512

    041f299840d0e37fc87fe7cc092b3ffdbc7d74c1bf41d53416d4c1ec88d0d6149e3ae6f71e37395ca05b94ff9b5e0708ed019f48677dc975091ffdbb686cfcdc

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpjNbZ7uyA36S7MpxRXrZSUNsYD/oV:i5nkFGMOtEvwDpjNbwQEI8UZDQV

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • Detects executables built or packed with MPress PE compressor 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-01_539f98766e72c79cf514f2e66cd31e14_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-01_539f98766e72c79cf514f2e66cd31e14_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2960
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:2416
  • 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=1032 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3052

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\misid.exe

      Filesize

      67KB

      MD5

      6a21928eb4c85ddcb809f72b94a615e8

      SHA1

      894ae7efcb8ca22ae5d90f8f07b9e75b9b4ab5fa

      SHA256

      3256db1d60e8c8b529b4f022af46c3427186382c74f8be174c60bad19ae122fd

      SHA512

      d4fb16cbd3ae0b3d4ad974828ad12dcb8925f1ae9904cd4dcf6690b261f9fc68ebb4b6645369e717c7693f17345f9dc050652eaf2d273a0ccf496689d9ca6113

    • C:\Users\Admin\AppData\Local\Temp\misids.exe

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/2416-18-0x0000000000850000-0x0000000000856000-memory.dmp

      Filesize

      24KB

    • memory/2416-24-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/2416-49-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/2960-0-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/2960-1-0x0000000000520000-0x0000000000526000-memory.dmp

      Filesize

      24KB

    • memory/2960-2-0x0000000000520000-0x0000000000526000-memory.dmp

      Filesize

      24KB

    • memory/2960-3-0x0000000000540000-0x0000000000546000-memory.dmp

      Filesize

      24KB

    • memory/2960-26-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB