Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-02-2024 14:26

General

  • Target

    2024-02-22_f573f84032d60d651cb51c8edd79e9b1_cryptolocker.exe

  • Size

    117KB

  • MD5

    f573f84032d60d651cb51c8edd79e9b1

  • SHA1

    d7931c5e4cca1cb78ba0fe39e59763f8a4a31a3e

  • SHA256

    fcd68ee11b8eeeec7da62a9b1437b39ee0fcf34c5c7cb1be18cfee093fe02284

  • SHA512

    d16d346a0a11d57aa5cd848da9a336a19a046a030f169130a99b5a990cd33c612930efe15c366e472a2b59682badb0cbc75c3912bf5f1a7af2a4e5ec92e63885

  • SSDEEP

    1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp014:z6a+CdOOtEvwDpjczW

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\2024-02-22_f573f84032d60d651cb51c8edd79e9b1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-22_f573f84032d60d651cb51c8edd79e9b1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:1900

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    117KB

    MD5

    d0f882cc98a99f379c31cfa729775dca

    SHA1

    9ec47d97faf6f9eb3684d7447eace869ec7ee4e8

    SHA256

    787fdb2c082837a997cb91de0c0802b5f964c2b9ee3b3b4495f47cb654951de8

    SHA512

    3738d68866e5f0b561521a3251963e66db9d3601e4582ab5e9956e18cac045452833930fdf5f06daf88f5cadb2cf4f93af722fe0bac8f9046fc66e5dd8a519dc

  • memory/1900-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1900-20-0x0000000000860000-0x0000000000866000-memory.dmp

    Filesize

    24KB

  • memory/1900-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/1900-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2036-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2036-1-0x0000000002190000-0x0000000002196000-memory.dmp

    Filesize

    24KB

  • memory/2036-2-0x0000000002190000-0x0000000002196000-memory.dmp

    Filesize

    24KB

  • memory/2036-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

    Filesize

    24KB

  • memory/2036-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB