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Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/02/2024, 14:02

General

  • Target

    2024-02-21_b88a28575a5076cadfe51fdc7bcb49a1_cryptolocker.exe

  • Size

    46KB

  • MD5

    b88a28575a5076cadfe51fdc7bcb49a1

  • SHA1

    a459854f46b6017135caffdd89285828fd435e33

  • SHA256

    fb815dc3d683c7d3e0dc92a8b4738b473c2a680a074cb28797a00497dfe6c497

  • SHA512

    af62c7385c414ebc8b16160b29ac0da1d03eb8e1f4c1f76339a03f72781f7699dd1ca88b52bc08ebf9ab0f7cb732fee227ab5f33f5071653aa5e0b4c796952f2

  • SSDEEP

    768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Moo9i:qmbhXDmjr5MOtEvwDpj5cDtKkQZQS9xg

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\2024-02-21_b88a28575a5076cadfe51fdc7bcb49a1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-21_b88a28575a5076cadfe51fdc7bcb49a1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1436
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4784

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    47KB

    MD5

    59eaa8a550e1cefd5788bb707d397e09

    SHA1

    4ecc34f51a36bf27b133d0f51933803f47fdfe61

    SHA256

    bb8ff88f490cb5ad5fa9f95ec6f9d72a5da0d086971c14caea74806a7f9e06f2

    SHA512

    12be4b077d460fee2032adce67f250e55c858a5bfaa029951945cf2246beb2f80a591700adb8814a6e668ad8535d6b4aa34a852524b0c797d82de29398215286

  • memory/1436-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1436-1-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/1436-2-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/1436-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/1436-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4784-19-0x0000000000640000-0x0000000000646000-memory.dmp

    Filesize

    24KB

  • memory/4784-20-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/4784-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB