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Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/05/2024, 15:42

General

  • Target

    2024-05-21_534003edc0cf10464fcaa6b66b8b8036_cryptolocker.exe

  • Size

    68KB

  • MD5

    534003edc0cf10464fcaa6b66b8b8036

  • SHA1

    cd29699d53c6b16ada8fac25198472e411d8b214

  • SHA256

    4624aae5c3cd4d994d8dc3f800df640d667fbc3e88742874e0f21f4c3620bac9

  • SHA512

    6e322f107e5607b9f6d44ce262c8c7eea552741be4d14a0a824c9b63da63c752e5bfd95c01202635becc2e06e74d941fb605ac55a279731768e5ca0e537618f5

  • SSDEEP

    1536:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAek:78SEOtEvwDpjWYvQd2Px

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\2024-05-21_534003edc0cf10464fcaa6b66b8b8036_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_534003edc0cf10464fcaa6b66b8b8036_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2460
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3568

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    69KB

    MD5

    024a143e0a8e33d9bdf886a873ea1204

    SHA1

    a364edfae8b5abb17118fedda508646b9afc498b

    SHA256

    7db8093b625868e1f13a768e74735a6d1106b1ed28ed8ae93be8db6bf7af1e06

    SHA512

    dd8f4e264f7effc75016f07cec9ace71844e035d430af785206791793bae0c9f9ba94d0b5050852233e32d76a095839312d7e12f4b0653863ce1f02a7b6ec417

  • memory/2460-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2460-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/2460-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/2460-3-0x00000000007E0000-0x00000000007E6000-memory.dmp

    Filesize

    24KB

  • memory/2460-16-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3568-19-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/3568-25-0x0000000000640000-0x0000000000646000-memory.dmp

    Filesize

    24KB

  • memory/3568-26-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB