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Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/05/2024, 23:33

General

  • Target

    2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe

  • Size

    39KB

  • MD5

    7cb318f9d4b86cf44be7ecadf528d3ea

  • SHA1

    6e13ded0b67e8d215b85a9405bf2e33598e83301

  • SHA256

    de2785df4b535d61b8ad23bc1b46c235619ecfc7880f31963d6aa49877381de6

  • SHA512

    68aeb140434289a6f85792cab40dd37e79a9db8422c6dcc51fb37604ecd5cb6fac142a18055fd0b69e926bd549ca80603b33f8c8c0c7492751fb89baeb147bef

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY7f:qDdFJy3QMOtEvwDpjjWMl7Tsf

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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
  • UPX packed file 4 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\2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3976
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:460

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    39KB

    MD5

    c849ab0cb4e8e10ff689fce6d2d86399

    SHA1

    ae2bcb8afb65dfb3deff220b9384192d7aa1f6b0

    SHA256

    648b4a520ecc9e4eab8b18eae81c56ee0415e1dcbfa85b00da4a40a1b66c6b84

    SHA512

    939ef57850a1fc8e0e5926cc48309f19a27302ba747adcd744aa8d8d61196781c1bcd851436bce5d1bbf7f084ee880fe34ee8c692c8e52d92e74dda989a55518

  • memory/460-20-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/460-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/460-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3976-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3976-1-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/3976-3-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/3976-9-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/3976-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB