Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    23-10-2020 10:24

General

  • Target

    Vidoe001mp4.scr signed FAT11 d.o.o.exe

  • Size

    1.2MB

  • MD5

    0d0c318096299a617f70ea57559c4f55

  • SHA1

    8199b12cc24d416cb8835b5e3d00b92339ad9b45

  • SHA256

    73feac20d7cdbe1e10ca26b196d60d68ea0c4e652ceacf534b1c549e4e597e74

  • SHA512

    b6cfc8df9556683cf4cbef46aa208081853d4132cee94fbcd0a6d9ee2ded5d6dd5987578093eae98c595776b51104613c5bc2e6e42bb543c2c59c2eafa012751

Malware Config

Extracted

Family

remcos

C2

108.174.197.5:5050

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 4 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.

  • Drops file in Windows directory 1 IoCs
  • Gathers network information 2 TTPs 1 IoCs

    Uses commandline utility to view network configuration.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6892 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 175 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Vidoe001mp4.scr signed FAT11 d.o.o.exe
    "C:\Users\Admin\AppData\Local\Temp\Vidoe001mp4.scr signed FAT11 d.o.o.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3920
    • C:\Windows\SysWOW64\ipconfig.exe
      "C:\Windows\system32\ipconfig.exe"
      2⤵
      • Gathers network information
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:1148
      • C:\Users\Admin\AppData\Local\Temp\cmd.exe
        "C:\Users\Admin\AppData\Local\Temp\cmd.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Drops file in Windows directory
        • Modifies Internet Explorer settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:2756
        • C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe
          "C:\Users\Admin\AppData\Local\Temp\GetX64BTIT.exe"
          4⤵
          • Executes dropped EXE
          PID:4032
        • C:\Users\Admin\AppData\Local\Temp\{40BA515E-68FB-42F4-9B0C-74D7328C625B}\2053331618.exe
          "2053331618.exe"
          4⤵
          • Executes dropped EXE
          PID:3792
        • C:\Users\Admin\AppData\Local\Temp\{40BA515E-68FB-42F4-9B0C-74D7328C625B}\sJifmQn.exe
          "C:\Users\Admin\AppData\Local\Temp\{40BA515E-68FB-42F4-9B0C-74D7328C625B}\sJifmQn.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Modifies registry class
          PID:1188
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
            5⤵
              PID:2152
              • C:\Users\Admin\AppData\Local\Temp\cmd.exe
                "C:\Users\Admin\AppData\Local\Temp\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
                6⤵
                • Executes dropped EXE
                PID:784
                • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
                  C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
                  7⤵
                  • Executes dropped EXE
                  • Adds Run key to start application
                  • Suspicious use of SetWindowsHookEx
                  PID:2864

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • memory/1148-2-0x0000000006710000-0x00000000067AF000-memory.dmp

      Filesize

      636KB

    • memory/1148-1-0x00000000060B0000-0x0000000006132000-memory.dmp

      Filesize

      520KB

    • memory/2756-5-0x0000000000400000-0x000000000049F000-memory.dmp

      Filesize

      636KB