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Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/05/2024, 04:52

General

  • Target

    2024-05-27_d3d8a1cf4b82b52f4dda2f643aa0eee3_cryptolocker.exe

  • Size

    94KB

  • MD5

    d3d8a1cf4b82b52f4dda2f643aa0eee3

  • SHA1

    af1d7cad6e05290fe107a15502f15b3e4fa6a32f

  • SHA256

    8750d5628c3a6c9e6a03e18ff57e849120d4229922dff90a027a2ed69dca5d3c

  • SHA512

    5860d5a3e0434208699848b9bc634c0dc2d6b88008c6de252255434dc228faad646a8b10aa8cfc46cf5b0dd2631911bbb8e83ecc73d1bc497bfb6072b53467c4

  • SSDEEP

    1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp0+oy:AnBdOOtEvwDpj6zBy

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\2024-05-27_d3d8a1cf4b82b52f4dda2f643aa0eee3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_d3d8a1cf4b82b52f4dda2f643aa0eee3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1516
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2988

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    94KB

    MD5

    6cb8c8000f389d4f2c73a728ad9da349

    SHA1

    f18e874bb26d28187a936dfdce200384c1128d28

    SHA256

    c93f21d8fcc20da34280f5413a2a7921459bbf16f109f094ed32bf6813bffacc

    SHA512

    6c6202c271813e32d979cab0377a8efc045900bc957b215be5ace1f0e1f5a54516ceb9c89fc984bfa67342da29d8e660277e1bc00a18baf0e55ee66eff68697b

  • memory/1516-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/1516-1-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/1516-2-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/1516-3-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/1516-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2988-19-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2988-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2988-22-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2988-28-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB