Analysis

  • max time kernel
    146s
  • max time network
    83s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    29/05/2021, 00:16

General

  • Target
    068082355ea6c432c0773a43696180ac.exe
  • Size 866KB
  • Sample210529-2pgjsdc76a
  • SHA256 129264dc4a2060710aafef169d4fb773f99f6fa7588e206591d55d69617e96fd
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\068082355ea6c432c0773a43696180ac.exe
    "C:\Users\Admin\AppData\Local\Temp\068082355ea6c432c0773a43696180ac.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:672
    • C:\Users\Admin\AppData\Local\Temp\068082355ea6c432c0773a43696180ac.exe
      "C:\Users\Admin\AppData\Local\Temp\068082355ea6c432c0773a43696180ac.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3136
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\0fedfd17-cc4c-4a69-8e1b-d0e4684ae72f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1964
      • C:\Users\Admin\AppData\Local\Temp\068082355ea6c432c0773a43696180ac.exe
        "C:\Users\Admin\AppData\Local\Temp\068082355ea6c432c0773a43696180ac.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3264
        • C:\Users\Admin\AppData\Local\Temp\068082355ea6c432c0773a43696180ac.exe
          "C:\Users\Admin\AppData\Local\Temp\068082355ea6c432c0773a43696180ac.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2288
  • C:\Users\Admin\AppData\Local\0fedfd17-cc4c-4a69-8e1b-d0e4684ae72f\068082355ea6c432c0773a43696180ac.exe
    C:\Users\Admin\AppData\Local\0fedfd17-cc4c-4a69-8e1b-d0e4684ae72f\068082355ea6c432c0773a43696180ac.exe --Task
    1⤵
    • Executes dropped EXE
    PID:2316

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/672-114-0x0000000002210000-0x000000000232B000-memory.dmp

        memory/2288-124-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3136-115-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3136-117-0x0000000000400000-0x0000000000537000-memory.dmp