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
    09/06/2024, 07:33

General

  • Target

    2024-06-09_ad1d156e8bb19e69ee8d0d262537ad29_cryptolocker.exe

  • Size

    67KB

  • MD5

    ad1d156e8bb19e69ee8d0d262537ad29

  • SHA1

    3b5e7cd61e0be42a145ce614b8112964cd62d20b

  • SHA256

    4b5565c77b6cac62f7b7c9d08b1d2d146fc11771e1399bd496ea9ffadeb09386

  • SHA512

    fcb0374d5586f8fef7f384d28da6e2649940e8b76e291790540139de693b82093620ee894e3a6f3b89f0aee8aa32cd70e0b6f5d6598fad48673c539b74b7da96

  • SSDEEP

    1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xDyfXT:1nK6a+qdOOtEvwDpjo

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\2024-06-09_ad1d156e8bb19e69ee8d0d262537ad29_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-09_ad1d156e8bb19e69ee8d0d262537ad29_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2916
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:1272

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    67KB

    MD5

    affa2bac4eb8ba007608599320064592

    SHA1

    3b44758d23cd6fd3e4f3faa81141bcb2bb432b8c

    SHA256

    488496c5d862442d7c3021ad6df81f4ba7b771ce761ea7c1a12a6d737054c01a

    SHA512

    e89c1487f722a9136645c7557f43e576385785cc5ec2b1caee35145fd864f9824f0d9f37772e7017f6f6748f2945282cf321e4ed3011fbd217696cc76a85f9e3

  • memory/1272-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/1272-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/1272-26-0x0000000000500000-0x000000000050F311-memory.dmp

    Filesize

    60KB

  • memory/2916-0-0x0000000000500000-0x000000000050F311-memory.dmp

    Filesize

    60KB

  • memory/2916-1-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/2916-2-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/2916-3-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/2916-17-0x0000000000500000-0x000000000050F311-memory.dmp

    Filesize

    60KB