Analysis

  • max time kernel
    149s
  • max time network
    152s
  • 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, 22:29

General

  • Target
    2024-06-02_f6aa69c58af44f63af3caf5aa9de898b_cryptolocker.exe
  • Size 72KB
  • Sample240602-2eh7jaad98
  • SHA256 a16bb554ebec21a4791dd085377e00c0dc2ca95c2ec6be8680cd2137cf43227e
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 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_f6aa69c58af44f63af3caf5aa9de898b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-02_f6aa69c58af44f63af3caf5aa9de898b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3336
    • 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:3704

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 73KB
        • SHA256 ec80540999ade45a9480d9b4d0fbd9b117effa757b7c426a50531c7922cf9d79
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/3336-0-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/3336-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

        memory/3336-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

        memory/3336-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

        memory/3336-17-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/3704-19-0x0000000002100000-0x0000000002106000-memory.dmp

        memory/3704-25-0x00000000006B0000-0x00000000006B6000-memory.dmp

        memory/3704-49-0x0000000000500000-0x0000000000510000-memory.dmp