Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-05-2024 15:48

General

  • Target

    2024-05-09_e85b102f2eecfb37ae20e323da590f21_cryptolocker.exe

  • Size

    39KB

  • MD5

    e85b102f2eecfb37ae20e323da590f21

  • SHA1

    a3e088f4c49b288bd68967b2d1c0a255a08bb6bc

  • SHA256

    d0fe111e7d6ba2449bf5d2d750cc8c878f772b7883dd8727820e19ac720a7a9f

  • SHA512

    89d22fc14afc68d2a6df3e190ee3a755cc210b02005b9066afe507d6b3ac10772012f3eb6df28a3513c537a707e1af3c0c0a508cfcedd95ba072a1d6ef12168b

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaIzlH:qDdFJy3QMOtEvwDpjjWMl7TdEH

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\2024-05-09_e85b102f2eecfb37ae20e323da590f21_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-09_e85b102f2eecfb37ae20e323da590f21_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4152
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4908

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    39KB

    MD5

    cab9901a89bba01cfd294db4759f9e6c

    SHA1

    6a91feab897e8d08608126a47f5ad25b80ff6528

    SHA256

    90fc6a138951c7f0d29dfdb941928252ce967f117d7c1af11518843b00ec1758

    SHA512

    d427ab84b5f7d87e5103afb0946a906deaa8dafae17f86851fc3f76073f5ae3ccab110fc39685e83fe8dc13def19d164b7cfa5cdabae9f4b27c849d44a7262fb

  • memory/4152-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4152-1-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/4152-2-0x0000000000650000-0x0000000000656000-memory.dmp

    Filesize

    24KB

  • memory/4152-9-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/4152-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4908-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/4908-26-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/4908-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB