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Analysis

  • max time kernel
    148s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/05/2024, 22:38

General

  • Target

    2024-05-25_c38b60dc32d8fcd469456ab13d8d81f7_cryptolocker.exe

  • Size

    40KB

  • MD5

    c38b60dc32d8fcd469456ab13d8d81f7

  • SHA1

    e4a7478debe6448c97c4bf0f5f2ad94bc4237579

  • SHA256

    ca74d371515ec859319c06c21607ec1864ff5a2197745a7b7c17d7ca082a3243

  • SHA512

    53d0f8f0f2731af41bc398dc1e706dfa139a952182c4cee983787fe1e8cf1bbde52162b27884752d0f790924e577f510f19204b929c095dc452d90ddfe594b80

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY91:qDdFJy3QMOtEvwDpjjWMl7T+

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-05-25_c38b60dc32d8fcd469456ab13d8d81f7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-25_c38b60dc32d8fcd469456ab13d8d81f7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3856
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3724
  • 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 --field-trial-handle=3756,i,13879737908471496610,15335851594401413307,262144 --variations-seed-version --mojo-platform-channel-handle=4296 /prefetch:8
    1⤵
      PID:2592

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      40KB

      MD5

      4793968d029aa0fa9bbc90e155a4e830

      SHA1

      200ab7a36d4234705d56bdd33b40953603dd4718

      SHA256

      c94e918ceb51724ef1499350690deab8b357f3c93e57359e5b3d92526afe0d0d

      SHA512

      fba583368f3c571046bdb40c38b5385cf011415768a37a1d7bf74e6ae84f27715828418d4b99088047000e9073009e769d0cb2e93009de189a64971f009f81a4

    • memory/3724-17-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3724-20-0x0000000000650000-0x0000000000656000-memory.dmp

      Filesize

      24KB

    • memory/3724-26-0x0000000000630000-0x0000000000636000-memory.dmp

      Filesize

      24KB

    • memory/3724-27-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3856-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3856-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/3856-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/3856-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/3856-18-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB