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Analysis

  • max time kernel
    141s
  • 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
    15/05/2024, 21:27

General

  • Target

    2024-05-15_37cb6a33dca04cedc79927e19a81df7d_cryptolocker.exe

  • Size

    96KB

  • MD5

    37cb6a33dca04cedc79927e19a81df7d

  • SHA1

    dccbadf5371b450d8d7ff3ff0463a4ca739f3b38

  • SHA256

    3b700db5676b3baa8fa4bad2911c67118a5fc1ed1adbe9c9798b7ea614dfd554

  • SHA512

    ed2ab774a230aeb1034008c7d218e89be0fc94ba5a9f57f2bff51adad413b9b99442951d4a0700de5e04fd63e7726972754230a098d1fe31e806eeec0e4fe027

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJYT6:xj+VGMOtEvwDpjubwQEIiVmksW

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\2024-05-15_37cb6a33dca04cedc79927e19a81df7d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-15_37cb6a33dca04cedc79927e19a81df7d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1964
    • 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:3844
  • 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=3356 --field-trial-handle=3240,i,13319578961094268484,16557498665191861597,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3140

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      96KB

      MD5

      89d7e06972b4d98bfd3004763ef0a851

      SHA1

      b852e3d9fe336f8ba999fdd8be0d121cfc3c87be

      SHA256

      4ab81700a0ca9e88f23a36792e657a4472b0c3f38dbbb7b610e5666474771527

      SHA512

      5967502abb041ab48be7328e500da1c2685ab57169f14f0b1ea74b6984c1a3bc342681eae3d783967afc4e012083bff9b500b4f753cd3cf1b2ff685019e3d4ac

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1964-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/1964-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/1964-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/1964-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/1964-25-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3844-18-0x00000000007D0000-0x00000000007D6000-memory.dmp

      Filesize

      24KB

    • memory/3844-24-0x00000000007B0000-0x00000000007B6000-memory.dmp

      Filesize

      24KB

    • memory/3844-48-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB