Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/06/2024, 07:44

General

  • Target

    2024-06-03_c489b30c1613bf60f71f6bc81d6a82f3_cryptolocker.exe

  • Size

    91KB

  • MD5

    c489b30c1613bf60f71f6bc81d6a82f3

  • SHA1

    427718deb37efe1ff55e8cdeaed2c3bdb092b1d2

  • SHA256

    5d6f29a54e4ebee9959e286bf49ee4e3ff280edb6231c87eaba4532f14af7915

  • SHA512

    10f9c14c15b00337903441ed56e48bb4d287bae4ef5142262cca26f1ba49fd28eb2af5f8d3a778582f0dbf25e36ef5d864858a8374a97544028b38d15025a882

  • SSDEEP

    1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAyN:n6a+1SEOtEvwDpjYYvQd2P0

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\2024-06-03_c489b30c1613bf60f71f6bc81d6a82f3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_c489b30c1613bf60f71f6bc81d6a82f3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2356
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3360

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    91KB

    MD5

    1cc32f094c3f4a57673425f9654fc033

    SHA1

    8d2e94ec7b62778a478eecb31c9764d8501b384b

    SHA256

    6daa110754b84c3705318b61d3e7ade22101bfd17f72709694b6e36b4ed00898

    SHA512

    e3961b4d426a93956b7b0a18081d961fef59b85596509ea84edfeeff36d3b118a8aa2536edd3c326d87b326a79c28b6aa7a2eda33b3a89ca116155bda6d6f4f3

  • memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2356-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/2356-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/2356-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3360-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3360-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3360-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3360-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB