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Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/02/2024, 03:48

General

  • Target

    2024-02-04_9a0cee245b8474795eba8c0120f90c04_cryptolocker.exe

  • Size

    70KB

  • MD5

    9a0cee245b8474795eba8c0120f90c04

  • SHA1

    7c6d2a75014def416316e809283ab2b59c7d3e66

  • SHA256

    81e17f7d3c6d6916e6f74968917f9c1d20128cfc5feceeb9d0ef9da4d51a68a9

  • SHA512

    3b1766426a8f7aa12979bf0206656b2b5ff132d218846dc73bc74a39b704b60c3929cfbc6ef084b38559f7d9f5b0793eaacfb5b6e8c8d55ac4d6aff36161f451

  • SSDEEP

    1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal3H:1nK6a+qdOOtEvwDpj8H

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\2024-02-04_9a0cee245b8474795eba8c0120f90c04_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-04_9a0cee245b8474795eba8c0120f90c04_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3284
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4200

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    70KB

    MD5

    6e9dde7e4c30f29927bea79745a1c369

    SHA1

    15ef2ad93442110d811a19cf701a8f1db39db32c

    SHA256

    02cc33289f45abefcf7c920826e9c5278933433fb6af2eb53f628005600fcbb3

    SHA512

    6c9cd3b55c42f8fa9e750b648a511b8167057c59d11b79fa1d366de92cf559ece9e8d8f028de16fedf92d23d3a5fc3efa68e45f9497b57440025749b7bdb3776

  • memory/3284-0-0x0000000000500000-0x000000000050F311-memory.dmp

    Filesize

    60KB

  • memory/3284-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3284-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3284-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3284-18-0x0000000000500000-0x000000000050F311-memory.dmp

    Filesize

    60KB

  • memory/4200-19-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4200-25-0x0000000000640000-0x0000000000646000-memory.dmp

    Filesize

    24KB

  • memory/4200-26-0x0000000000500000-0x000000000050F311-memory.dmp

    Filesize

    60KB