Analysis

  • max time kernel
    133s
  • max time network
    127s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    15-10-2021 13:18

General

  • Target

    f010795b19f2c56b230b7de0f9803cd3aeea208a.exe

  • Size

    2.0MB

  • MD5

    517e0a4d7e27837a7075615032a6cc69

  • SHA1

    f010795b19f2c56b230b7de0f9803cd3aeea208a

  • SHA256

    f4743b96b2336504bd9b8207b0794da22e9eaf583703a7e3dd58cf872314ac4f

  • SHA512

    5c9f1b9c874587b79852e98fe7adb06f544dbbb5b5af7bd60205cd4c24a43e5ab37d85d4ccb1fb22815942e6546cf936f1caa371718440cd01618094a0f18bb7

Malware Config

Extracted

Family

webmonitor

C2

niiarmah.wm01.to:443

Attributes
  • config_key

    4EcDHH7aWbl50LayUnuRlJWUXiKQWk0O

  • private_key

    yvkn5wM8E

  • url_path

    /recv5.php

Signatures

  • RevcodeRat, WebMonitorRat

    WebMonitor is a remote access tool that you can use from any browser access to control, and monitor your phones, or PCs.

  • WebMonitor Payload 5 IoCs
  • Executes dropped EXE 9 IoCs
  • Obfuscated with Agile.Net obfuscator 3 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • 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 36 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of WriteProcessMemory 51 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f010795b19f2c56b230b7de0f9803cd3aeea208a.exe
    "C:\Users\Admin\AppData\Local\Temp\f010795b19f2c56b230b7de0f9803cd3aeea208a.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3076
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "Updates1" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Updates.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3764
      • C:\Windows\SysWOW64\reg.exe
        REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "Updates1" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Updates.exe"
        3⤵
        • Adds Run key to start application
        PID:1800
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Updates.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Updates.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2732
      • C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
        "C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3164
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\EbjlEPhYZrruwPz7.bat" "
          4⤵
            PID:508
        • C:\Users\Admin\AppData\Local\Temp\Antivirus.exe
          "C:\Users\Admin\AppData\Local\Temp\Antivirus.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3772
          • C:\Users\Admin\AppData\Local\Temp\Antivirus.exe
            "C:\Users\Admin\AppData\Local\Temp\Antivirus.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:936
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Updates.exe
              "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Updates.exe"
              5⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:3064
              • C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
                "C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                PID:1056
                • C:\Windows\SysWOW64\cmd.exe
                  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\OBG7SXrqhKZ2EUzG.bat" "
                  7⤵
                    PID:2936
                • C:\Users\Admin\AppData\Local\Temp\Antivirus.exe
                  "C:\Users\Admin\AppData\Local\Temp\Antivirus.exe"
                  6⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of WriteProcessMemory
                  PID:2104
                  • C:\Users\Admin\AppData\Local\Temp\Antivirus.exe
                    "C:\Users\Admin\AppData\Local\Temp\Antivirus.exe"
                    7⤵
                    • Executes dropped EXE
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    PID:1828
                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Updates.exe
                      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Updates.exe"
                      8⤵
                      • Executes dropped EXE
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      PID:2100

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • memory/1056-184-0x0000000000400000-0x00000000004F3000-memory.dmp

        Filesize

        972KB

      • memory/2100-211-0x0000000006501000-0x0000000006502000-memory.dmp

        Filesize

        4KB

      • memory/2100-210-0x0000000006500000-0x0000000006501000-memory.dmp

        Filesize

        4KB

      • memory/2732-142-0x00000000075E0000-0x00000000075EB000-memory.dmp

        Filesize

        44KB

      • memory/2732-143-0x00000000075F0000-0x00000000075F1000-memory.dmp

        Filesize

        4KB

      • memory/2732-140-0x0000000005C40000-0x0000000005C41000-memory.dmp

        Filesize

        4KB

      • memory/2732-141-0x0000000005C41000-0x0000000005C42000-memory.dmp

        Filesize

        4KB

      • memory/3064-169-0x0000000005AF0000-0x0000000005AF1000-memory.dmp

        Filesize

        4KB

      • memory/3064-174-0x0000000005970000-0x0000000005A02000-memory.dmp

        Filesize

        584KB

      • memory/3064-175-0x0000000005970000-0x0000000005A02000-memory.dmp

        Filesize

        584KB

      • memory/3076-120-0x00000000052F0000-0x00000000052F1000-memory.dmp

        Filesize

        4KB

      • memory/3076-127-0x0000000004D60000-0x0000000004DF2000-memory.dmp

        Filesize

        584KB

      • memory/3076-124-0x00000000064A0000-0x00000000064A1000-memory.dmp

        Filesize

        4KB

      • memory/3076-123-0x00000000064D0000-0x00000000064D1000-memory.dmp

        Filesize

        4KB

      • memory/3076-122-0x00000000053D0000-0x00000000053F1000-memory.dmp

        Filesize

        132KB

      • memory/3076-117-0x0000000005400000-0x0000000005401000-memory.dmp

        Filesize

        4KB

      • memory/3076-121-0x0000000004D60000-0x0000000004DF2000-memory.dmp

        Filesize

        584KB

      • memory/3076-115-0x0000000000380000-0x0000000000381000-memory.dmp

        Filesize

        4KB

      • memory/3076-119-0x0000000004F00000-0x0000000004F01000-memory.dmp

        Filesize

        4KB

      • memory/3076-118-0x0000000004E00000-0x0000000004E01000-memory.dmp

        Filesize

        4KB

      • memory/3164-147-0x0000000000400000-0x00000000004F3000-memory.dmp

        Filesize

        972KB

      • memory/3164-144-0x0000000000400000-0x00000000004F3000-memory.dmp

        Filesize

        972KB

      • memory/3772-151-0x0000000000DF0000-0x0000000000DF1000-memory.dmp

        Filesize

        4KB