Analysis

  • max time kernel
    150s
  • max time network
    137s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    30/09/2021, 07:42

General

  • Target

    14ebd19a3d30828fb90b8a00e9342d4c326888eab4f2794b2c31aa3f23e69ed8.exe

  • Size

    1.2MB

  • MD5

    8db269a5125e5503e09cab3165814770

  • SHA1

    9cdd2bef768bec002cba71842e5e5a9373fc3775

  • SHA256

    14ebd19a3d30828fb90b8a00e9342d4c326888eab4f2794b2c31aa3f23e69ed8

  • SHA512

    ed356b5ea783c41e3837809e80a19e0a9fa4b7f581ebbef224c1ed3541f3a8240b38bfd727145a81a02a32ac4efa39fa92c736cf889d4cd5ac26578bb85cdc0f

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

grace.adds-only.xyz:1609

Mutex

VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes
  • encryption_key

    wHq4o3k6UfKZv19jkcxs

  • install_name

    winrara.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Signatures

  • Contains code to disable Windows Defender 9 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs
  • Quasar Payload 9 IoCs
  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • VenomRAT

    VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 3 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\14ebd19a3d30828fb90b8a00e9342d4c326888eab4f2794b2c31aa3f23e69ed8.exe
    "C:\Users\Admin\AppData\Local\Temp\14ebd19a3d30828fb90b8a00e9342d4c326888eab4f2794b2c31aa3f23e69ed8.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1424
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\14ebd19a3d30828fb90b8a00e9342d4c326888eab4f2794b2c31aa3f23e69ed8.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1524
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eoyNXypOzigfHo" /XML "C:\Users\Admin\AppData\Local\Temp\tmp781B.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:752
    • C:\Users\Admin\AppData\Local\Temp\14ebd19a3d30828fb90b8a00e9342d4c326888eab4f2794b2c31aa3f23e69ed8.exe
      "C:\Users\Admin\AppData\Local\Temp\14ebd19a3d30828fb90b8a00e9342d4c326888eab4f2794b2c31aa3f23e69ed8.exe"
      2⤵
      • Loads dropped DLL
      • Windows security modification
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:528
      • C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe
        "C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1196
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe"
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:524
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eoyNXypOzigfHo" /XML "C:\Users\Admin\AppData\Local\Temp\tmp310E.tmp"
          4⤵
          • Creates scheduled task(s)
          PID:1896
        • C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1420
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "powershell" Get-MpPreference -verbose
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1488
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1072
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
          4⤵
            PID:1768
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Admin\AppData\Local\Temp\G2jRkvGLr1PJ.bat" "
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1552
          • C:\Windows\SysWOW64\chcp.com
            chcp 65001
            4⤵
              PID:968
            • C:\Windows\SysWOW64\PING.EXE
              ping -n 10 localhost
              4⤵
              • Runs ping.exe
              PID:472
            • C:\Users\Admin\AppData\Local\Temp\14ebd19a3d30828fb90b8a00e9342d4c326888eab4f2794b2c31aa3f23e69ed8.exe
              "C:\Users\Admin\AppData\Local\Temp\14ebd19a3d30828fb90b8a00e9342d4c326888eab4f2794b2c31aa3f23e69ed8.exe"
              4⤵
              • Suspicious use of SetThreadContext
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:812
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\14ebd19a3d30828fb90b8a00e9342d4c326888eab4f2794b2c31aa3f23e69ed8.exe"
                5⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1356
              • C:\Windows\SysWOW64\schtasks.exe
                "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eoyNXypOzigfHo" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC7B1.tmp"
                5⤵
                • Creates scheduled task(s)
                PID:1208
              • C:\Users\Admin\AppData\Local\Temp\14ebd19a3d30828fb90b8a00e9342d4c326888eab4f2794b2c31aa3f23e69ed8.exe
                "C:\Users\Admin\AppData\Local\Temp\14ebd19a3d30828fb90b8a00e9342d4c326888eab4f2794b2c31aa3f23e69ed8.exe"
                5⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1764

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • memory/524-110-0x0000000002410000-0x000000000305A000-memory.dmp

        Filesize

        12.3MB

      • memory/528-64-0x0000000000400000-0x000000000048C000-memory.dmp

        Filesize

        560KB

      • memory/528-68-0x0000000000AA0000-0x0000000000AA1000-memory.dmp

        Filesize

        4KB

      • memory/528-66-0x0000000000400000-0x000000000048C000-memory.dmp

        Filesize

        560KB

      • memory/812-95-0x0000000004E70000-0x0000000004E71000-memory.dmp

        Filesize

        4KB

      • memory/812-93-0x0000000000270000-0x0000000000271000-memory.dmp

        Filesize

        4KB

      • memory/1196-76-0x0000000000070000-0x0000000000071000-memory.dmp

        Filesize

        4KB

      • memory/1196-81-0x00000000005B0000-0x00000000005B1000-memory.dmp

        Filesize

        4KB

      • memory/1356-125-0x0000000002420000-0x000000000306A000-memory.dmp

        Filesize

        12.3MB

      • memory/1356-126-0x0000000002420000-0x000000000306A000-memory.dmp

        Filesize

        12.3MB

      • memory/1356-124-0x0000000002420000-0x000000000306A000-memory.dmp

        Filesize

        12.3MB

      • memory/1420-109-0x0000000004AB0000-0x0000000004AB1000-memory.dmp

        Filesize

        4KB

      • memory/1424-54-0x0000000000EE0000-0x0000000000EE1000-memory.dmp

        Filesize

        4KB

      • memory/1424-58-0x0000000007FB0000-0x0000000008072000-memory.dmp

        Filesize

        776KB

      • memory/1424-59-0x0000000000520000-0x0000000000522000-memory.dmp

        Filesize

        8KB

      • memory/1424-60-0x0000000008080000-0x0000000008115000-memory.dmp

        Filesize

        596KB

      • memory/1424-57-0x00000000004B0000-0x00000000004C3000-memory.dmp

        Filesize

        76KB

      • memory/1424-56-0x0000000004E40000-0x0000000004E41000-memory.dmp

        Filesize

        4KB

      • memory/1488-83-0x0000000002400000-0x000000000304A000-memory.dmp

        Filesize

        12.3MB

      • memory/1488-84-0x0000000002400000-0x000000000304A000-memory.dmp

        Filesize

        12.3MB

      • memory/1488-82-0x0000000002400000-0x000000000304A000-memory.dmp

        Filesize

        12.3MB

      • memory/1524-69-0x0000000002540000-0x000000000318A000-memory.dmp

        Filesize

        12.3MB

      • memory/1524-62-0x0000000076201000-0x0000000076203000-memory.dmp

        Filesize

        8KB

      • memory/1524-71-0x0000000002540000-0x000000000318A000-memory.dmp

        Filesize

        12.3MB

      • memory/1524-70-0x0000000002540000-0x000000000318A000-memory.dmp

        Filesize

        12.3MB

      • memory/1764-123-0x00000000047F0000-0x00000000047F1000-memory.dmp

        Filesize

        4KB