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Analysis

  • max time kernel
    181s
  • max time network
    189s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/02/2024, 20:26

General

  • Target

    2024-02-28_0f31a4c7325bf3d0f69e963646f250be_cryptolocker.exe

  • Size

    47KB

  • MD5

    0f31a4c7325bf3d0f69e963646f250be

  • SHA1

    975185ec71c9dc12dc2ca1019940d5d2704bb52c

  • SHA256

    ce3a38d2f2acd97ca277f95d595b095a1fd9255a925bd07e8fce9dec96d35c70

  • SHA512

    1c20eab3ac7ea3d279d24d17b80c7d175917c8ffdc5e87c5b8636e3b944bfdb69751961be7d8c1ca4a92749ebfd2362e98fa81aad260673cd7d17afce23465b3

  • SSDEEP

    768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo2pZ:qmbhXDmjr5MOtEvwDpj5cDtKkQZQE

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 4 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\2024-02-28_0f31a4c7325bf3d0f69e963646f250be_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-28_0f31a4c7325bf3d0f69e963646f250be_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:116
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:860

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    47KB

    MD5

    28428f784d9eba7a3473cf98a8f0570f

    SHA1

    6d4761e380d5eb11c3322c329b72576502632239

    SHA256

    8f7c5c45f99761fedce86dfe62ca3e12c30748b8034888cd5cca8f3dd36d8835

    SHA512

    da179c0403ca28e19e667e4777e5a16d478223df98ffab0198d0f17b192ace686e8a90705a718474be5c3b85928bc999477ba12fbe98d59af05407d973475f5b

  • memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/116-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/116-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/116-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/860-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/860-22-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/860-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB