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Analysis

  • max time kernel
    148s
  • 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
    27/05/2024, 18:39

General

  • Target

    2024-05-27_b9fdd0d71cf78b07753983a73414a69c_cryptolocker.exe

  • Size

    38KB

  • MD5

    b9fdd0d71cf78b07753983a73414a69c

  • SHA1

    d86a8cf628b112386e757e24942b112bed4ba59e

  • SHA256

    ffbd3927c69dac346d0b779cfe7eeebaa73cebd5a2b68b2819f91c0f0703c1e0

  • SHA512

    2c69ff13d1ab2932480b80d1edc897e70d1a945252a0218ecf4437e017a84f77f36f39a2f6f9d80eb14c90b379093ff4786721e857d6cb5ee9cb61bf2b7aea64

  • SSDEEP

    768:qTVbxjgQNQXtckstOOtEvwDpjAaD3TUogs/VXpAPWRd:qTJu9cvMOtEvwDpjppVXzRd

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 5 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 5 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\2024-05-27_b9fdd0d71cf78b07753983a73414a69c_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_b9fdd0d71cf78b07753983a73414a69c_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3392
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2040

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    38KB

    MD5

    6516c7fb9325af207f5b3c01522d1b5b

    SHA1

    94301b13cf689bc26f032fd36fbe7d232e5995b6

    SHA256

    39f2efe85f138e0b0eeae92d41f3852f533fdacf6906eb8cb681ab5c9bb37085

    SHA512

    ac19d41e09a2d3029698eee2bb6e56d1bf59de2143013ed7f20b35e8e7f0ea0cbc7617f5818a9facdac428c60a4b50842bba5c4d18d21382d7106ddf8f942688

  • memory/2040-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2040-20-0x0000000000680000-0x0000000000686000-memory.dmp

    Filesize

    24KB

  • memory/2040-26-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/2040-27-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3392-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3392-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/3392-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/3392-9-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/3392-16-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB