Analysis

  • max time kernel
    148s
  • max time network
    84s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    26/05/2021, 16:59

General

  • Target
    7026b11c2f3116904b38e03a0b0ed706.exe
  • Size 843KB
  • Sample210526-n28jas54fa
  • SHA256 4d54efae853bb657096c19ccab822849250af7a4051e60e3a1d44d0fb7f6502e
  • 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\7026b11c2f3116904b38e03a0b0ed706.exe
    "C:\Users\Admin\AppData\Local\Temp\7026b11c2f3116904b38e03a0b0ed706.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4068
    • C:\Users\Admin\AppData\Local\Temp\7026b11c2f3116904b38e03a0b0ed706.exe
      "C:\Users\Admin\AppData\Local\Temp\7026b11c2f3116904b38e03a0b0ed706.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3980
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\f66a0617-d251-4cc5-8994-d9b712495d8e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2404
      • C:\Users\Admin\AppData\Local\Temp\7026b11c2f3116904b38e03a0b0ed706.exe
        "C:\Users\Admin\AppData\Local\Temp\7026b11c2f3116904b38e03a0b0ed706.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1392
        • C:\Users\Admin\AppData\Local\Temp\7026b11c2f3116904b38e03a0b0ed706.exe
          "C:\Users\Admin\AppData\Local\Temp\7026b11c2f3116904b38e03a0b0ed706.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2704
  • C:\Users\Admin\AppData\Local\f66a0617-d251-4cc5-8994-d9b712495d8e\7026b11c2f3116904b38e03a0b0ed706.exe
    C:\Users\Admin\AppData\Local\f66a0617-d251-4cc5-8994-d9b712495d8e\7026b11c2f3116904b38e03a0b0ed706.exe --Task
    1⤵
    • Executes dropped EXE
    PID:3868

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/2704-124-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3980-115-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3980-117-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4068-114-0x0000000002220000-0x000000000233B000-memory.dmp