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Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/05/2024, 01:02

General

  • Target

    2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe

  • Size

    38KB

  • MD5

    a4fa9de8350ebb0b85e76bbce3a658c1

  • SHA1

    66051cf13dafdcbec642bb67415e4d692a8e27da

  • SHA256

    8e773ff162c9c380da2d68736cb343dcb0bb46942c8dd418c0f063fa4345207a

  • SHA512

    2359da2d9c47b0d2c84797b3432ec731caeafc31f33eeb0a9af19264747a39980701580be1e71a1d124ae0dccaf4928103904df15f1f5a27132ab50f416ba0ff

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBc:qDdFJy3QMOtEvwDpjjWMl7TdW

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\2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2600
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:748

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    38KB

    MD5

    52f228ab6bee7f6966da494ea1b26605

    SHA1

    9a7225400f68f53dfc3578d98b0d9057cf72d806

    SHA256

    b4f7d270df2423150eaac836a37647b63c2677b6cd92fa79e80b10ceffdc8523

    SHA512

    90ac9ee94f3687ba97f3ac19d5728ca08935444515777b16fcf35721618e418423c90b66d2ade3d33cd112ac6664b0eaae6aae21331c5a485de9316bd5bf5ff1

  • memory/748-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/748-26-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/748-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2600-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2600-2-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/2600-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/2600-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/2600-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB