Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/05/2024, 03:41

General

  • Target
    2024-05-26_64ae07722883c7dba4a36a378542e169_cryptolocker.exe
  • Size 95KB
  • Sample240526-d8zvdaec93
  • SHA256 ed13c5d5081feaa92c46b56c040c849cb94ac514503c2d5222d7d4a1fde847b5
  • MD5 SHA1 SHA512 SSDEEP
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 2 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).

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-26_64ae07722883c7dba4a36a378542e169_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-26_64ae07722883c7dba4a36a378542e169_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2868
    • 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:1912

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 95KB
        • SHA256 3e16e6956134e5f859f360a81307840be379acc34d165300571415d4195aad0f
        • MD5 SHA1 SHA512 SSDEEP

        misids.exe

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

        memory/1912-18-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/1912-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

        memory/1912-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

        memory/1912-49-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp

        memory/2868-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

        memory/2868-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

        memory/2868-9-0x00000000020D0000-0x00000000020D6000-memory.dmp

        memory/2868-17-0x0000000000500000-0x0000000000510000-memory.dmp