Analysis

  • max time kernel
    148s
  • max time network
    150s
  • 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 19:27

General

  • Target

    2024-02-04_3dd5d1cac7c05313513c9f87a6da1360_cryptolocker.exe

  • Size

    64KB

  • MD5

    3dd5d1cac7c05313513c9f87a6da1360

  • SHA1

    d133a313163383db58b680b9a92700573801058d

  • SHA256

    4130b86f2a091273261b0e96dc6d3a48ab589660dee3aee73f96068f6d7ade9e

  • SHA512

    619e844e5bfb3651533471bf438c3411bb59c99e539cea72d9c2ea640ff651890ecde51109d5f6066991617b86496a0b5c7bc22c119d20915d3103274ce5c20c

  • SSDEEP

    1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUa1Fr:T6a+rdOOtEvwDpjNL

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\2024-02-04_3dd5d1cac7c05313513c9f87a6da1360_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-04_3dd5d1cac7c05313513c9f87a6da1360_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3236
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2720

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    65KB

    MD5

    9b702b4b98793a5d1a367bff2f6fb7a1

    SHA1

    2fb6b764af304493d5d5047e939ef5d4a83ad595

    SHA256

    d3243ea26c9144b2ab47d45a4a4a5ca8a25133f8b7e6ecfcf6bba6c6d05756b7

    SHA512

    697f86db1d9ab2f015bc70c26780c753d753fc662536d2238f8fac175fc15c10bd3e81cdf141ba4c3519dc6e54d679472682f086b7a944be241a821f56ad8157

  • memory/2720-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2720-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2720-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2720-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3236-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3236-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/3236-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/3236-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/3236-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB