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Analysis

  • max time kernel
    147s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/02/2024, 04:22

General

  • Target

    2024-02-12_8b38beaea0fb518e9c429df0c5d4d39b_cryptolocker.exe

  • Size

    82KB

  • MD5

    8b38beaea0fb518e9c429df0c5d4d39b

  • SHA1

    1332d693d4822af682d2184a90877d6b637ae133

  • SHA256

    dc9cebb95a27f8281322479e9a6ac8cf940516ccea70baf42a95260ff805042b

  • SHA512

    d5dab4fd1dba9ba611eff23655500167cc23187615a342ce9ed2aa57890c2a45b522da53a6284bd338ef6b7efe848ca524e1b87a5c73f5df411f934d83df9ab7

  • SSDEEP

    1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7v:T6a+rdOOtEvwDpjNj

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\2024-02-12_8b38beaea0fb518e9c429df0c5d4d39b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-12_8b38beaea0fb518e9c429df0c5d4d39b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2408
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2444

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    82KB

    MD5

    72ecff1721fc53a5e036025e8a2f85d6

    SHA1

    ca3e33cce91dcbd1164b8ab8ec39829ce130fdfc

    SHA256

    097b6530987ed31aa5353ab603c95d5317b9acdc807cab34588af5010010efd9

    SHA512

    3258f7d1da6ea08b079547d7a04ee932107378918dc15127976945adc311dbb671a5036f57a2f6af998bd42f351e04efa784045dc6c5ccaea42f6014f65b07c7

  • memory/2408-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2408-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2408-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2408-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2408-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2444-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2444-26-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/2444-20-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/2444-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB