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Analysis

  • max time kernel
    142s
  • 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
    23/04/2024, 18:27

General

  • Target

    2024-04-23_990ffa0428f987eb35cc804c2f506c7c_cryptolocker.exe

  • Size

    50KB

  • MD5

    990ffa0428f987eb35cc804c2f506c7c

  • SHA1

    af1744ee334b95a3dde66ed6b08e7c867b24e6b5

  • SHA256

    ec32f02537c6285b206f5c78a72bb1e35dd1928e29cdd35416501b440d1650b0

  • SHA512

    b83f33079c87a015f53d12a3cb9c1cc97b1712a1a1eebc7ad93ef041b901048eab4828dd324e127362e8396461f3fa831ae74e31596ad7fb5d96bf97484c85af

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPhqlcnvhx5/xFRp5jvbN:6j+1NMOtEvwDpjr8hhXj53N

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-23_990ffa0428f987eb35cc804c2f506c7c_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-23_990ffa0428f987eb35cc804c2f506c7c_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2964
    • 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:1332
  • 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=1348 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4368

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      50KB

      MD5

      a22c943ed8018d54b593a10984d6e376

      SHA1

      717d19abd8a7e9131cb6cad96cdf29c41c5be290

      SHA256

      acfc0442bcc1a4be97dca687e35df053ea8c2e31a9ceb7661681f2c14df848a1

      SHA512

      ee33917a85d9a9380fa93d33570c1bdfbf292087bc75ab5ea1ec10f1a45b8eff0cd75a945f39500e9c1697d4758ae9eb4e64b0ffc3fafbc5fc9e3d32653d2a4f

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1332-18-0x00000000005C0000-0x00000000005C6000-memory.dmp

      Filesize

      24KB

    • memory/1332-21-0x00000000005A0000-0x00000000005A6000-memory.dmp

      Filesize

      24KB

    • memory/1332-48-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/2964-0-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/2964-1-0x0000000000520000-0x0000000000526000-memory.dmp

      Filesize

      24KB

    • memory/2964-2-0x0000000000520000-0x0000000000526000-memory.dmp

      Filesize

      24KB

    • memory/2964-3-0x0000000000540000-0x0000000000546000-memory.dmp

      Filesize

      24KB

    • memory/2964-24-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB