Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/06/2024, 01:16

General

  • Target

    2024-06-11_d5a46cfd3beb5e753bb64f9bbcc7e8ea_cryptolocker.exe

  • Size

    91KB

  • MD5

    d5a46cfd3beb5e753bb64f9bbcc7e8ea

  • SHA1

    f06954774e4d45412a85c7a219ee5f72a438cbe0

  • SHA256

    642a937703929eb905b527336d2b6472d36837e462e3f58942608727896dd4b6

  • SHA512

    6148a3fc906fa10bc5d87e4f4c41ac378d3fe87b1235dbda341af380e11f18aa99284abdff24da4e677dcf4c2f2f50c05df128195dcf3669333fda84503aa40f

  • SSDEEP

    1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/LJ:n6a+1SEOtEvwDpjYYvQd2P2

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 4 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 4 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\2024-06-11_d5a46cfd3beb5e753bb64f9bbcc7e8ea_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-11_d5a46cfd3beb5e753bb64f9bbcc7e8ea_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3952
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4920

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          91KB

          MD5

          873d54eda494371edd52d08b35902e35

          SHA1

          be42732bc7482671616bbae9b0e267cf4f462c16

          SHA256

          daec362e59234a4361adb73c6415ccc432a6a55d4b1ff91bc72a306c79f699a7

          SHA512

          f8b63351a84b6e1351f93860793bb1ff984b0f4981e376ccdf9228061965c6601a326f4594460b6b37dea9953cca4911e7e6d8a867d4d2e196643faea43add9d

        • memory/3952-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3952-3-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/3952-2-0x0000000000680000-0x0000000000686000-memory.dmp

          Filesize

          24KB

        • memory/3952-1-0x0000000000680000-0x0000000000686000-memory.dmp

          Filesize

          24KB

        • memory/3952-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4920-19-0x0000000002090000-0x0000000002096000-memory.dmp

          Filesize

          24KB

        • memory/4920-25-0x0000000000520000-0x0000000000526000-memory.dmp

          Filesize

          24KB

        • memory/4920-26-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB