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Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/02/2024, 11:43

General

  • Target

    2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe

  • Size

    39KB

  • MD5

    bda97fa11f49c0a13bf90d913747ba84

  • SHA1

    c80899b6bb74cc178115debe04f1a907e4b37a94

  • SHA256

    8604f1c36999d9f419384b1226da7648d3db699405468a0f399e15cc1036ed83

  • SHA512

    1d6313ed3b7f1fd8928ba854767366739214f48ddd77ab4aaeac16fc06f73ec3eefafd23628ce078a2a7dab684b3d0d7f933012e91090970579b77047a0856ed

  • SSDEEP

    768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlE2Pn:b/pYayGig5HjS3+2P

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 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\2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:720
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:5012

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    39KB

    MD5

    b7f1a137afa6ca414d1cc2f35a9c2781

    SHA1

    0ebeb9dc09f9b6c3574b60c72510052b688de401

    SHA256

    f21312942d2ebbd82195f807f5dc76a95daef2a3bfada419bf79ee5f73196f01

    SHA512

    1643f91b9f0b6642a155e4ae8e6b08c7754bea4fb8c57e3b44dff97e01b07cabacb77964b5e7f7a6597cae4f742ea70c043e8638b0d85b449ddf2b9604e0a427

  • memory/720-0-0x0000000002340000-0x0000000002346000-memory.dmp

    Filesize

    24KB

  • memory/720-2-0x0000000002340000-0x0000000002346000-memory.dmp

    Filesize

    24KB

  • memory/720-1-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/5012-25-0x0000000002010000-0x0000000002016000-memory.dmp

    Filesize

    24KB