Analysis

  • max time kernel
    104s
  • max time network
    96s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    12-05-2022 11:56

General

  • Target

    ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982.exe

  • Size

    618KB

  • MD5

    813f353b1285bcaea41f868746ab9fdd

  • SHA1

    301209445bdfd758b1f647bdbcf1609ee07296e7

  • SHA256

    ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

  • SHA512

    1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Windows Defender Security

C2

vilvaraj-32652.portmap.io:32652

Mutex

VNM_MUTEX_XoAJ77Kcpkuyjz4MJK

Attributes
  • encryption_key

    5nIMwmTRG5wyVhouaxGb

  • install_name

    Windows Defender Security.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Defender Security

  • 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.

  • suricata: ET MALWARE Common RAT Connectivity Check Observed

    suricata: ET MALWARE Common RAT Connectivity Check Observed

  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 6 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 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 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Runs ping.exe 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982.exe
    "C:\Users\Admin\AppData\Local\Temp\ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:480
    • C:\Users\Admin\AppData\Local\Temp\ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982.exe
      "C:\Users\Admin\AppData\Local\Temp\ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982.exe"
      2⤵
      • Loads dropped DLL
      • Windows security modification
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1684
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Windows Defender Security" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:1316
      • C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe
        "C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1544
        • C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe"
          4⤵
          • Executes dropped EXE
          PID:1964
        • C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1816
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks" /create /tn "Windows Defender Security" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe" /rl HIGHEST /f
            5⤵
            • Creates scheduled task(s)
            PID:1040
          • C:\Windows\SysWOW64\cmd.exe
            cmd /c ""C:\Users\Admin\AppData\Local\Temp\gbXB4Nm2vFt0.bat" "
            5⤵
              PID:1552
              • C:\Windows\SysWOW64\chcp.com
                chcp 65001
                6⤵
                  PID:1712
                • C:\Windows\SysWOW64\PING.EXE
                  ping -n 10 localhost
                  6⤵
                  • Runs ping.exe
                  PID:1292
                • C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe
                  "C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe"
                  6⤵
                  • Executes dropped EXE
                  • Suspicious use of SetThreadContext
                  • Suspicious use of WriteProcessMemory
                  PID:1504
                  • C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe
                    "C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe"
                    7⤵
                    • Executes dropped EXE
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1488
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1816 -s 1496
                5⤵
                • Loads dropped DLL
                • Program crash
                PID:1616
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "powershell" Get-MpPreference -verbose
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1536
          • 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:888
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
              4⤵
                PID:548
            • C:\Windows\SysWOW64\cmd.exe
              cmd /c ""C:\Users\Admin\AppData\Local\Temp\oqzN6mCAD4OK.bat" "
              3⤵
                PID:1748
                • C:\Windows\SysWOW64\chcp.com
                  chcp 65001
                  4⤵
                    PID:1972
                  • C:\Windows\SysWOW64\PING.EXE
                    ping -n 10 localhost
                    4⤵
                    • Runs ping.exe
                    PID:1724
                  • C:\Users\Admin\AppData\Local\Temp\ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982.exe
                    "C:\Users\Admin\AppData\Local\Temp\ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982.exe"
                    4⤵
                    • Suspicious use of SetThreadContext
                    PID:1992
                    • C:\Users\Admin\AppData\Local\Temp\ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982.exe
                      "C:\Users\Admin\AppData\Local\Temp\ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982.exe"
                      5⤵
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      PID:2012

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Local\Temp\oqzN6mCAD4OK.bat

              Filesize

              261B

              MD5

              64404fb92a7a66b9224a427a51e10af6

              SHA1

              053fa3e8ee13411f16e377d8012656c3f5ea4863

              SHA256

              36bd3c0ee014c52b8e89821adb8e50ac0910d2b82318b881874dfadc6dcae2cd

              SHA512

              c3654fc8b9c4b1a66132d153bf6f7c0ca5cb933a1d928f8c71a9302c4f9c0b7c4661bc8e2582186f174cf996c359bc5371c20acd235c5fdcbcd9101473d6763f

            • C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe

              Filesize

              618KB

              MD5

              813f353b1285bcaea41f868746ab9fdd

              SHA1

              301209445bdfd758b1f647bdbcf1609ee07296e7

              SHA256

              ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

              SHA512

              1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

            • C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe

              Filesize

              618KB

              MD5

              813f353b1285bcaea41f868746ab9fdd

              SHA1

              301209445bdfd758b1f647bdbcf1609ee07296e7

              SHA256

              ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

              SHA512

              1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

            • C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe

              Filesize

              618KB

              MD5

              813f353b1285bcaea41f868746ab9fdd

              SHA1

              301209445bdfd758b1f647bdbcf1609ee07296e7

              SHA256

              ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

              SHA512

              1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

            • C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe

              Filesize

              618KB

              MD5

              813f353b1285bcaea41f868746ab9fdd

              SHA1

              301209445bdfd758b1f647bdbcf1609ee07296e7

              SHA256

              ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

              SHA512

              1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

            • C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe

              Filesize

              618KB

              MD5

              813f353b1285bcaea41f868746ab9fdd

              SHA1

              301209445bdfd758b1f647bdbcf1609ee07296e7

              SHA256

              ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

              SHA512

              1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

            • C:\Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe

              Filesize

              618KB

              MD5

              813f353b1285bcaea41f868746ab9fdd

              SHA1

              301209445bdfd758b1f647bdbcf1609ee07296e7

              SHA256

              ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

              SHA512

              1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

            • \Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe

              Filesize

              618KB

              MD5

              813f353b1285bcaea41f868746ab9fdd

              SHA1

              301209445bdfd758b1f647bdbcf1609ee07296e7

              SHA256

              ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

              SHA512

              1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

            • \Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe

              Filesize

              618KB

              MD5

              813f353b1285bcaea41f868746ab9fdd

              SHA1

              301209445bdfd758b1f647bdbcf1609ee07296e7

              SHA256

              ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

              SHA512

              1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

            • \Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe

              Filesize

              618KB

              MD5

              813f353b1285bcaea41f868746ab9fdd

              SHA1

              301209445bdfd758b1f647bdbcf1609ee07296e7

              SHA256

              ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

              SHA512

              1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

            • \Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe

              Filesize

              618KB

              MD5

              813f353b1285bcaea41f868746ab9fdd

              SHA1

              301209445bdfd758b1f647bdbcf1609ee07296e7

              SHA256

              ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

              SHA512

              1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

            • \Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe

              Filesize

              618KB

              MD5

              813f353b1285bcaea41f868746ab9fdd

              SHA1

              301209445bdfd758b1f647bdbcf1609ee07296e7

              SHA256

              ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

              SHA512

              1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

            • \Users\Admin\AppData\Roaming\SubDir\Windows Defender Security.exe

              Filesize

              618KB

              MD5

              813f353b1285bcaea41f868746ab9fdd

              SHA1

              301209445bdfd758b1f647bdbcf1609ee07296e7

              SHA256

              ce140c5a412462747256fb0c54a6d4ffd98a891fba26164a62fd2349c3f44982

              SHA512

              1ef96e09c43a7c71395112c2a867e60259483585deeb60c122482d4e943b7eef7f432196eb62387655d819d29e8c64c98cf49b04623ff185924135b8aa128d38

            • memory/480-55-0x0000000075941000-0x0000000075943000-memory.dmp

              Filesize

              8KB

            • memory/480-56-0x0000000000250000-0x000000000025A000-memory.dmp

              Filesize

              40KB

            • memory/480-54-0x0000000000EC0000-0x0000000000F62000-memory.dmp

              Filesize

              648KB

            • memory/548-115-0x0000000000000000-mapping.dmp

            • memory/888-114-0x0000000000000000-mapping.dmp

            • memory/1040-91-0x0000000000000000-mapping.dmp

            • memory/1316-69-0x0000000000000000-mapping.dmp

            • memory/1488-107-0x0000000000486CFE-mapping.dmp

            • memory/1536-75-0x0000000000000000-mapping.dmp

            • memory/1536-92-0x000000006EE20000-0x000000006F3CB000-memory.dmp

              Filesize

              5.7MB

            • memory/1544-74-0x0000000001010000-0x00000000010B2000-memory.dmp

              Filesize

              648KB

            • memory/1544-71-0x0000000000000000-mapping.dmp

            • memory/1552-93-0x0000000000000000-mapping.dmp

            • memory/1616-94-0x0000000000000000-mapping.dmp

            • memory/1684-63-0x0000000000486CFE-mapping.dmp

            • memory/1684-65-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/1684-58-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/1684-57-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/1684-60-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/1684-62-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/1684-67-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/1684-61-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/1724-119-0x0000000000000000-mapping.dmp

            • memory/1748-116-0x0000000000000000-mapping.dmp

            • memory/1816-83-0x0000000000486CFE-mapping.dmp

            • memory/1972-118-0x0000000000000000-mapping.dmp

            • memory/1992-120-0x0000000000000000-mapping.dmp

            • memory/2012-127-0x0000000000486CFE-mapping.dmp