Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-02-2024 04:04

General

  • Target

    2024-02-18_fe36d642ab33139de45e1ad0fcf5c7a0_cryptolocker.exe

  • Size

    61KB

  • MD5

    fe36d642ab33139de45e1ad0fcf5c7a0

  • SHA1

    915891df5656e7dc3a9beb32c088dff2c45df32b

  • SHA256

    8189a68f84c4b6b07f40993ab23f2a29b02e36898454a2581a4dfa7c139ee018

  • SHA512

    d5305ccc7b0791deb3ca093e4b9b1be16305671e927a6282e6ac6634dd00615dfc7dad7ad97b30ef0a35251d1a36869e030c3931b329d23dc0a97a10c4bb6521

  • SSDEEP

    1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsk:BbdDmjr+OtEvwDpjM88

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 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
  • 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\2024-02-18_fe36d642ab33139de45e1ad0fcf5c7a0_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-18_fe36d642ab33139de45e1ad0fcf5c7a0_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4088
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4680

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    73588bc3955e6d935bec270f9065f535

    SHA1

    6747b32bfea923799c254897b617678bc924a44e

    SHA256

    1a08c8abc35746ca9e42e4fa7ca20d69618fb242293d6979aa54b705b6225925

    SHA512

    40216d2f9401dfc5e8f15f4351e5043ae0b4346e0db968e0b2ebe613019073d5b717ba428b12dfb3e4984a9c7b4223235c0f1d973e82cd0dfb8a8a9569743ebc

  • memory/4088-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4088-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4088-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4088-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4088-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4680-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4680-20-0x0000000000760000-0x0000000000766000-memory.dmp

    Filesize

    24KB

  • memory/4680-22-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4680-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB