Analysis

  • max time kernel
    149s
  • 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
    02/06/2024, 22:23

General

  • Target
    2024-06-02_276b5f6dac73ef82e869e4a5ba404e81_cryptolocker.exe
  • Size 82KB
  • Sample240602-2bae8ahb9v
  • SHA256 396f5ad68050f3b89002ffcb5cb0896e5545d570cb267d311e5b4ee62a4085c1
  • MD5 SHA1 SHA512 SSDEEP
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 2 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).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-02_276b5f6dac73ef82e869e4a5ba404e81_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-02_276b5f6dac73ef82e869e4a5ba404e81_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2816
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:3948

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        misid.exe

        • Path C:\Users\Admin\AppData\Local\Temp\misid.exe
        • Size 82KB
        • SHA256 7a4fb8344f2207714656093957ec36ac06237fa3e9969f5235ccbc98e8781cd6
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

        • Path C:\Users\Admin\AppData\Local\Temp\misids.exe
        • Size 315B
        • SHA256 d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3
        • MD5 SHA1 SHA512

        memory/2816-0-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/2816-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/2816-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

        memory/2816-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/2816-17-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/3948-19-0x0000000002100000-0x0000000002106000-memory.dmp

        memory/3948-25-0x00000000005B0000-0x00000000005B6000-memory.dmp

        memory/3948-50-0x0000000000500000-0x0000000000510000-memory.dmp