Analysis

  • max time kernel
    150s
  • 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, 19:42

General

  • Target

    2024-03-05_94f39a8244ba7bd972810d56fd4df188_cryptolocker.exe

  • Size

    120KB

  • MD5

    94f39a8244ba7bd972810d56fd4df188

  • SHA1

    3f92a8f87525501636060d709a14f694208863bf

  • SHA256

    41c15ecb31738d3611258cd2ac804d9d8f92ab906845f4b409d40771fed6b735

  • SHA512

    8ceb03552c4337e4ca14d7efc17642ed419e5389a867510a5c2baf0a9783559125210b4c2e1da466671ed77f26782e71e5a8e1c5530b239525c5482f2bb45374

  • SSDEEP

    1536:u6QFElP6n+gWMOtEvwDpjJGYQbN/PKwMgo:u6a++OtEvwDpj6zs

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 IoCs
  • Checks computer location settings 2 TTPs 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-05_94f39a8244ba7bd972810d56fd4df188_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-05_94f39a8244ba7bd972810d56fd4df188_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:860
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3856
  • 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=4448 --field-trial-handle=2496,i,15897292497548307209,13920214570023230813,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3620

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      121KB

      MD5

      d83a1c9b2d361e0766e5cc81bfc7840c

      SHA1

      71869fc686e346cdee99bee983249f30c8a9250b

      SHA256

      2cbddb8fed82f47900812e01aeb3d5d2ee19965494056547a74faec4e09483f3

      SHA512

      5b389c691602ccca57d5b09f75ca354236122341c8a296de78ac2f943fbc69d7e8ea6bd3dc906f7926079aabbd8ff623a55af686bdd012fb60b3bb7b3558ae59

    • memory/860-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/860-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/860-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

      Filesize

      24KB

    • memory/3856-17-0x0000000002050000-0x0000000002056000-memory.dmp

      Filesize

      24KB

    • memory/3856-20-0x0000000002150000-0x0000000002156000-memory.dmp

      Filesize

      24KB