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Analysis

  • max time kernel
    140s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/05/2024, 04:03

General

  • Target

    2024-05-26_fd47664a1a3951b8eab4d2f82c5d12fa_cryptolocker.exe

  • Size

    96KB

  • MD5

    fd47664a1a3951b8eab4d2f82c5d12fa

  • SHA1

    63f84e6a96ec037edb779dddb1544d00d51c18fe

  • SHA256

    8a19963bc478e299ddba603f212a1de8e78a581589dcacd656f44de22a1f65a2

  • SHA512

    d2b60f09343d0ed0d1894796a6c3bed742bf98ac96411e3033b79b1f0837904dbc7905da457835b1f7da85d9a9909a5eb247dd4d37ba55f2badc0a3cb6dd0d13

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJyqdm:xj+VGMOtEvwDpjubwQEIiVmkuqQ

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\2024-05-26_fd47664a1a3951b8eab4d2f82c5d12fa_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-26_fd47664a1a3951b8eab4d2f82c5d12fa_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4268
    • 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:4936
  • 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=3700 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4908

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      97KB

      MD5

      67b2c74cfce72dc7e40ce9318b9456f0

      SHA1

      6048264e244feabe09259e297dbbd710adeb2882

      SHA256

      213533111f0e588da0a3114b97e2f7df8e3332ec223265c05f2d19b559bd9f46

      SHA512

      62b30abd29c287fb4dd4374f2a68550a3664852cff234731a689cae25314f8d539145e2672fe7324a4ad308e615d8a244f043a6ffa2ec84f7154ed3c44e5b22d

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/4268-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4268-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

      Filesize

      24KB

    • memory/4268-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

      Filesize

      24KB

    • memory/4268-3-0x0000000000660000-0x0000000000666000-memory.dmp

      Filesize

      24KB

    • memory/4268-25-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4936-20-0x0000000000570000-0x0000000000576000-memory.dmp

      Filesize

      24KB

    • memory/4936-18-0x00000000005E0000-0x00000000005E6000-memory.dmp

      Filesize

      24KB

    • memory/4936-48-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB