Analysis

  • max time kernel
    76s
  • max time network
    78s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    18/04/2022, 11:49

General

  • Target

    e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe

  • Size

    644KB

  • MD5

    ba6403b11dfc7faf3eabf9a6c71c38e4

  • SHA1

    19a7760b1bfa03b9a650462e4e9d8a08f1ce069f

  • SHA256

    e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d

  • SHA512

    491e26588db0033dfcd1580aaeb1ddd8a23d19b71dea6a0b2f50b3175b2b758ffd310b978dd38a2ba8e40c6692d1adfc6f753a99abe9e5a09b891beb051a0807

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Windows Security

C2

vilvaraj-32652.portmap.io:32652

Mutex

VNM_MUTEX_px0s48GfhAUBhjVpWU

Attributes
  • encryption_key

    yvDiKJ3lhd7v25pBa6mQ

  • install_name

    Windows Security.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Security

  • subdirectory

    SubDir

Signatures

  • Contains code to disable Windows Defender 8 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 8 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 4 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 6 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 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe
    "C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:304
    • C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe
      "C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:1876
      • C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe
        "C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe"
        3⤵
        • Loads dropped DLL
        • Windows security modification
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:828
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks" /create /tn "Windows Security" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe" /rl HIGHEST /f
          4⤵
          • Creates scheduled task(s)
          PID:1564
        • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:592
          • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe
            "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1996
            • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe
              "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe"
              6⤵
              • Executes dropped EXE
              PID:1392
            • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe
              "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:1428
              • C:\Windows\SysWOW64\schtasks.exe
                "schtasks" /create /tn "Windows Security" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe" /rl HIGHEST /f
                7⤵
                • Creates scheduled task(s)
                PID:1644
              • C:\Windows\SysWOW64\cmd.exe
                cmd /c ""C:\Users\Admin\AppData\Local\Temp\BHJkJACO2EGy.bat" "
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:304
                • C:\Windows\SysWOW64\chcp.com
                  chcp 65001
                  8⤵
                    PID:2012
                  • C:\Windows\SysWOW64\PING.EXE
                    ping -n 10 localhost
                    8⤵
                    • Runs ping.exe
                    PID:1224
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 1428 -s 1480
                  7⤵
                  • Loads dropped DLL
                  • Program crash
                  PID:1412
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "powershell" Get-MpPreference -verbose
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:928
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
            4⤵
              PID:1068
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
                5⤵
                  PID:1992
              • C:\Windows\SysWOW64\cmd.exe
                cmd /c ""C:\Users\Admin\AppData\Local\Temp\WyHJCv0MMlsP.bat" "
                4⤵
                  PID:1520
                  • C:\Windows\SysWOW64\chcp.com
                    chcp 65001
                    5⤵
                      PID:832
                    • C:\Windows\SysWOW64\PING.EXE
                      ping -n 10 localhost
                      5⤵
                      • Runs ping.exe
                      PID:1480
                    • C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe
                      "C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe"
                      5⤵
                      • Suspicious use of SetThreadContext
                      PID:972
                      • C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe
                        "C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe"
                        6⤵
                        • Suspicious use of SetThreadContext
                        PID:1496
                        • C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe
                          "C:\Users\Admin\AppData\Local\Temp\e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d.exe"
                          7⤵
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2044

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\BHJkJACO2EGy.bat

              Filesize

              217B

              MD5

              ebf0391d36720686ed9bccff617ad0ae

              SHA1

              68f402cb7cca2f0813835ad47bc57da3b11c60f4

              SHA256

              de95ff6cc65eaaf3275c8204bfc2e48db202233e4023de2f37648dd3da784912

              SHA512

              41b63e1b31a9e877c24b9da4f4792370e6cba26b63dd9b9185ad6f5483d3acc90ea106230cd1a964fb71b0a9c7875ed3e488533f46dd40532d3eceb6b0346634

            • C:\Users\Admin\AppData\Local\Temp\WyHJCv0MMlsP.bat

              Filesize

              261B

              MD5

              30960b6348f867a7fc4a4aa2ad94e133

              SHA1

              02b350139188381b8b8ede6a57da40d33b74a148

              SHA256

              55b0c019cc508011f2948448fad577869ce35766027c7073009b1847599e1621

              SHA512

              0d33420bb6ac8027385ae632f6780ea673e3bfbeaf54569f07f3644b85a0c5f1f17c4f3f8a4fac75d37f3d93ef8832868e591543e32f3984eb2324ba8588ec48

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

              Filesize

              644KB

              MD5

              ba6403b11dfc7faf3eabf9a6c71c38e4

              SHA1

              19a7760b1bfa03b9a650462e4e9d8a08f1ce069f

              SHA256

              e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d

              SHA512

              491e26588db0033dfcd1580aaeb1ddd8a23d19b71dea6a0b2f50b3175b2b758ffd310b978dd38a2ba8e40c6692d1adfc6f753a99abe9e5a09b891beb051a0807

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

              Filesize

              644KB

              MD5

              ba6403b11dfc7faf3eabf9a6c71c38e4

              SHA1

              19a7760b1bfa03b9a650462e4e9d8a08f1ce069f

              SHA256

              e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d

              SHA512

              491e26588db0033dfcd1580aaeb1ddd8a23d19b71dea6a0b2f50b3175b2b758ffd310b978dd38a2ba8e40c6692d1adfc6f753a99abe9e5a09b891beb051a0807

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

              Filesize

              644KB

              MD5

              ba6403b11dfc7faf3eabf9a6c71c38e4

              SHA1

              19a7760b1bfa03b9a650462e4e9d8a08f1ce069f

              SHA256

              e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d

              SHA512

              491e26588db0033dfcd1580aaeb1ddd8a23d19b71dea6a0b2f50b3175b2b758ffd310b978dd38a2ba8e40c6692d1adfc6f753a99abe9e5a09b891beb051a0807

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

              Filesize

              644KB

              MD5

              ba6403b11dfc7faf3eabf9a6c71c38e4

              SHA1

              19a7760b1bfa03b9a650462e4e9d8a08f1ce069f

              SHA256

              e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d

              SHA512

              491e26588db0033dfcd1580aaeb1ddd8a23d19b71dea6a0b2f50b3175b2b758ffd310b978dd38a2ba8e40c6692d1adfc6f753a99abe9e5a09b891beb051a0807

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

              Filesize

              644KB

              MD5

              ba6403b11dfc7faf3eabf9a6c71c38e4

              SHA1

              19a7760b1bfa03b9a650462e4e9d8a08f1ce069f

              SHA256

              e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d

              SHA512

              491e26588db0033dfcd1580aaeb1ddd8a23d19b71dea6a0b2f50b3175b2b758ffd310b978dd38a2ba8e40c6692d1adfc6f753a99abe9e5a09b891beb051a0807

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

              Filesize

              644KB

              MD5

              ba6403b11dfc7faf3eabf9a6c71c38e4

              SHA1

              19a7760b1bfa03b9a650462e4e9d8a08f1ce069f

              SHA256

              e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d

              SHA512

              491e26588db0033dfcd1580aaeb1ddd8a23d19b71dea6a0b2f50b3175b2b758ffd310b978dd38a2ba8e40c6692d1adfc6f753a99abe9e5a09b891beb051a0807

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

              Filesize

              644KB

              MD5

              ba6403b11dfc7faf3eabf9a6c71c38e4

              SHA1

              19a7760b1bfa03b9a650462e4e9d8a08f1ce069f

              SHA256

              e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d

              SHA512

              491e26588db0033dfcd1580aaeb1ddd8a23d19b71dea6a0b2f50b3175b2b758ffd310b978dd38a2ba8e40c6692d1adfc6f753a99abe9e5a09b891beb051a0807

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

              Filesize

              644KB

              MD5

              ba6403b11dfc7faf3eabf9a6c71c38e4

              SHA1

              19a7760b1bfa03b9a650462e4e9d8a08f1ce069f

              SHA256

              e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d

              SHA512

              491e26588db0033dfcd1580aaeb1ddd8a23d19b71dea6a0b2f50b3175b2b758ffd310b978dd38a2ba8e40c6692d1adfc6f753a99abe9e5a09b891beb051a0807

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

              Filesize

              644KB

              MD5

              ba6403b11dfc7faf3eabf9a6c71c38e4

              SHA1

              19a7760b1bfa03b9a650462e4e9d8a08f1ce069f

              SHA256

              e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d

              SHA512

              491e26588db0033dfcd1580aaeb1ddd8a23d19b71dea6a0b2f50b3175b2b758ffd310b978dd38a2ba8e40c6692d1adfc6f753a99abe9e5a09b891beb051a0807

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

              Filesize

              644KB

              MD5

              ba6403b11dfc7faf3eabf9a6c71c38e4

              SHA1

              19a7760b1bfa03b9a650462e4e9d8a08f1ce069f

              SHA256

              e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d

              SHA512

              491e26588db0033dfcd1580aaeb1ddd8a23d19b71dea6a0b2f50b3175b2b758ffd310b978dd38a2ba8e40c6692d1adfc6f753a99abe9e5a09b891beb051a0807

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

              Filesize

              644KB

              MD5

              ba6403b11dfc7faf3eabf9a6c71c38e4

              SHA1

              19a7760b1bfa03b9a650462e4e9d8a08f1ce069f

              SHA256

              e0e76e89c5a7be76558559d83051f927f308a269d26f1c73d82df13c8afc834d

              SHA512

              491e26588db0033dfcd1580aaeb1ddd8a23d19b71dea6a0b2f50b3175b2b758ffd310b978dd38a2ba8e40c6692d1adfc6f753a99abe9e5a09b891beb051a0807

            • memory/304-54-0x00000000010D0000-0x0000000001178000-memory.dmp

              Filesize

              672KB

            • memory/304-56-0x00000000005A0000-0x00000000005AA000-memory.dmp

              Filesize

              40KB

            • memory/304-55-0x0000000075311000-0x0000000075313000-memory.dmp

              Filesize

              8KB

            • memory/592-86-0x0000000000A30000-0x0000000000AD8000-memory.dmp

              Filesize

              672KB

            • memory/828-72-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/828-73-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/828-79-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/828-77-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/828-74-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/828-69-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/828-70-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/928-116-0x000000006E880000-0x000000006EE2B000-memory.dmp

              Filesize

              5.7MB

            • memory/972-134-0x0000000001360000-0x0000000001408000-memory.dmp

              Filesize

              672KB

            • memory/1876-61-0x0000000000400000-0x0000000000492000-memory.dmp

              Filesize

              584KB

            • memory/1876-58-0x0000000000400000-0x0000000000492000-memory.dmp

              Filesize

              584KB

            • memory/1876-67-0x0000000000400000-0x0000000000492000-memory.dmp

              Filesize

              584KB

            • memory/1876-65-0x0000000000400000-0x0000000000492000-memory.dmp

              Filesize

              584KB

            • memory/1876-57-0x0000000000400000-0x0000000000492000-memory.dmp

              Filesize

              584KB

            • memory/1876-60-0x0000000000400000-0x0000000000492000-memory.dmp

              Filesize

              584KB

            • memory/1876-62-0x0000000000400000-0x0000000000492000-memory.dmp

              Filesize

              584KB