Analysis

  • max time kernel
    151s
  • max time network
    152s
  • 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, 20:34

General

  • Target

    2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe

  • Size

    34KB

  • MD5

    648afc78acd72a9f26786ee7d2ef7d90

  • SHA1

    265d7b81adab55a10fbe84ca4b5204fb422b0db5

  • SHA256

    1f838f808e67b4fe8c69f97fe489e7f86589a7c3b83a03e41e7f4e8c434d9568

  • SHA512

    3677a873be39d31313c85d3f74aa4af6a765b603a5b84a6b8f915791fcf3338fc82131464842ee985f8a7fe29987edde70e6bfd7bd0fd9b2ce159c5b13b4561c

  • SSDEEP

    768:b/yC4GyNM01GuQMNXw2PSjHC02ltAUACh:b/pYayGig5HC02gbCh

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\2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4444
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:1520

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          35KB

          MD5

          dc40b9379c679d7eec20377b36552225

          SHA1

          6aee4f7f4a684bd36aee4d0a4b1b7ab6f5deaf1c

          SHA256

          9c9bde0b9a8ed77071d7ccb7bfcd5381c9b5b74f3833db78b34b612079a4e164

          SHA512

          444842ab4a9320a50a66b7d6f7db7ad1a4ccdee9d6600148ab3b5c4764bf0ff52b239ee7f79dd87dce71b0b450431ced12b3b7860d651814fdbd929e828cbb94

        • memory/1520-21-0x00000000021D0000-0x00000000021D6000-memory.dmp

          Filesize

          24KB

        • memory/4444-0-0x0000000000530000-0x0000000000536000-memory.dmp

          Filesize

          24KB

        • memory/4444-1-0x0000000000530000-0x0000000000536000-memory.dmp

          Filesize

          24KB

        • memory/4444-2-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB