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Analysis

  • max time kernel
    3s
  • max time network
    71s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    19/03/2024, 20:42

General

  • Target

    2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe

  • Size

    35KB

  • MD5

    03536215f3a82169420d9e5ba8ebfcc4

  • SHA1

    a8a541a3a9af85aee86555689e32e522b1b33a1f

  • SHA256

    9259836c45851a9d33089eb7aa3608e5b7ff854e096fda71fd904098283c6b16

  • SHA512

    f0faf33753dda3f1770b5a73ab9c88dae05910024bfc2023549bbb94fd6577bc139e83edb459269337eaf6c0b5f2ff53ffcb809ee3decd4190838d74080be43c

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZQYFxh4:b/yC4GyNM01GuQMNXw2PSj1POah4

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of UnmapMainImage 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:2380
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of UnmapMainImage
      PID:3000

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\Temp\retln.exe

    Filesize

    36KB

    MD5

    9221af77af562e6fd135366c34fd0b01

    SHA1

    c4a02b5215fb21e9b204d982e25d019ed836cf6c

    SHA256

    dc9f17ef1a3ce26bf42eefaa4f0d4f63f9f00eb11bc755b5234183d2f32b77b0

    SHA512

    d310af99e6e2ea04e0f1b60390fdaa72f61ec3fef7d9ceb3b572480dfb276308fba921d467ddf84bfad2cac11b2e23ccf41090c0bba41a8249d52df8fcf76d40

  • memory/2380-0-0x00000000003B0000-0x00000000003B6000-memory.dmp

    Filesize

    24KB

  • memory/2380-1-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/2380-8-0x00000000003B0000-0x00000000003B6000-memory.dmp

    Filesize

    24KB

  • memory/3000-23-0x0000000000280000-0x0000000000286000-memory.dmp

    Filesize

    24KB