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Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/02/2024, 15:28

General

  • Target

    2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe

  • Size

    48KB

  • MD5

    5e5fca34a2985db7e47f240b4587d25a

  • SHA1

    b1e61412f4f0c007ed53b70944a4d190a509c1b0

  • SHA256

    28d15af47253c8e74cdc4ee24dc6bae93c510a08d33ecc7e8577b4e456bd1189

  • SHA512

    0dfa017c4563597c7dbc0b318e4e28651ee2d6bfee59b28c7298e4bb0b9e929b9c8cc5023a063f0e3c04045e157a2053e7d8cf1cab8fe5e3dcdcc94238f5f58a

  • SSDEEP

    768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05WTB52Y:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ6uY

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\2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4172
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4864

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    48KB

    MD5

    0ba1fb1d297df4eaf8c1d149417ea4ac

    SHA1

    cba4713dc2e2637e9ae9861daca964cf6df60503

    SHA256

    43742b6dba8fc49c86ef70861c9bedff5aac08ab12c9df95b615462e5e0c6120

    SHA512

    407a725fb75273d0f776fb34b4e1ccf5a53916614d8068c52774e814024c197ed87075c9516bbb74b1576b557d95edd61ab6a5213037f8f4258cfeafca7afc0d

  • memory/4172-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4172-1-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/4172-2-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/4172-3-0x0000000000650000-0x0000000000656000-memory.dmp

    Filesize

    24KB

  • memory/4172-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4864-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/4864-20-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/4864-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB