Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/06/2024, 21:37

General

  • Target

    2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe

  • Size

    80KB

  • MD5

    a21c08c3ea498909e478defc9461c09d

  • SHA1

    e2b80962de7e62689402c5fdb18dc82e4213856d

  • SHA256

    cf7267048f58fa1be4bdcd8524efb028a1d5bf8cb85a311d553544a212b7de8c

  • SHA512

    1de7472874b843cdf4ffba91a1bfb34e2c7177f1a4410769774bdb7f894720ed2f7aa59fb0ddb5e14d7947cdda3f42c0a2632f8c4c37b366f489fee97c434e0f

  • SSDEEP

    1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRhD:T6a+rdOOtEvwDpjNtQ

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\2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2844
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2344

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          80KB

          MD5

          655e29d5362a718e0eaa02a2a6fec858

          SHA1

          f0b089eb05447160f662afe3e50d1a0f0869f3f4

          SHA256

          dda0ccf9063b5984ca800c0e6b412e40710dbe3a57c0a2a2e2a7a0cb9d9880e5

          SHA512

          61515707ac70050b803d79585c69e4b085237f3bb7dff1725d80659d349ca43b9c49661b77700d490f02d498a15c20ba472f985b6249465ad791b4abd1fc73fa

        • memory/2344-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

          Filesize

          24KB

        • memory/2344-25-0x00000000006B0000-0x00000000006B6000-memory.dmp

          Filesize

          24KB

        • memory/2344-26-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2844-1-0x0000000000630000-0x0000000000636000-memory.dmp

          Filesize

          24KB

        • memory/2844-2-0x0000000000760000-0x0000000000766000-memory.dmp

          Filesize

          24KB

        • memory/2844-9-0x0000000000630000-0x0000000000636000-memory.dmp

          Filesize

          24KB

        • memory/2844-16-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB