Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/06/2024, 18:43

General

  • Target

    2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe

  • Size

    41KB

  • MD5

    b831353f920ed50ba14c9dae189b8e37

  • SHA1

    3ff06d328a2e4fd2a5441ed065f67f9c098d1994

  • SHA256

    24cd98c92de3f71b5ed52698fa8c4c2553251e715af3667e61abc1402b57b1fc

  • SHA512

    a893eb11f77629d7eeb146502ed89b356c09cb2a382af4bed478699e636a38a6950e1bc7e8d6a87af1df771901d5f9e8e7579ea98dc71df17f6e6fb345574b2e

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBc4S1:qDdFJy3QMOtEvwDpjjWMl7Tds1

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\2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4476
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4656

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    41KB

    MD5

    bdd25fc69fafcd93344e44f49f91620b

    SHA1

    ae87dab63b3ef9ec0f016887d0b7a4fe22962bf7

    SHA256

    a01c8efd73d3d13a89d17853111869b71537befe58a00369200ee6ed3bf2dc6c

    SHA512

    eb5fc6318d86697011d46c351a2cd7b8466802ea6a16b981126434e6c85a44357538947025e19aa61e02a261608f169ffa044212f95630c45ce6a6e49ae85005

  • memory/4476-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4476-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/4476-2-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB

  • memory/4476-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/4476-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4656-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4656-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4656-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4656-28-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB