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Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/03/2024, 16:29

General

  • Target

    2024-03-10_71631bd4df6e8882695f1b8f8233fb71_cryptolocker.exe

  • Size

    62KB

  • MD5

    71631bd4df6e8882695f1b8f8233fb71

  • SHA1

    761b85bb5d012701da3bdfd28942513a9e401aff

  • SHA256

    87df76e890933c81748298b443f6bc81bdcc37c46d13d53f7c8f27fed682da48

  • SHA512

    15230aef1f23254bc4253c5511bec417e459e3b6d2b3f4791792b79348c715216f60f6d361ffd6b194c662802944684e1d74adfb050cbc4cdb937edb09b79980

  • SSDEEP

    1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtstY:BbdDmjr+OtEvwDpjM8W

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 2 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
  • 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\2024-03-10_71631bd4df6e8882695f1b8f8233fb71_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-10_71631bd4df6e8882695f1b8f8233fb71_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4640
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:756

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    ce7d8e63150488b8885357fdc432493a

    SHA1

    08f7d164082f02b7dbd69d5b8a18da8090d0262b

    SHA256

    741f1f80ba1daa314fc4099972e7eae4af12a8a7743d9b03aadf5409c169d85d

    SHA512

    6bee0af6d4adc31f42ef566d51a9949fe401faefcc62dd18a4f33991718b2b32d2089cfc5337f8daf1c69524f356bba409c71d7b79e219369e199f12242ea5e4

  • memory/756-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/756-20-0x0000000001FE0000-0x0000000001FE6000-memory.dmp

    Filesize

    24KB

  • memory/756-22-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/756-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4640-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4640-2-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/4640-1-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/4640-3-0x0000000002060000-0x0000000002066000-memory.dmp

    Filesize

    24KB

  • memory/4640-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB