Analysis

  • max time kernel
    55s
  • max time network
    85s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    29-01-2023 17:31

General

  • Target

    d5f6dbe3d6f5644a77d7a3971d9dd17caec494ced43ffc535473b285b0f1507e.exe

  • Size

    1.0MB

  • MD5

    d7ddd317f0382a2200832312449a20cd

  • SHA1

    bd3710cff6322c6a372db549b637c32e383f05cc

  • SHA256

    d5f6dbe3d6f5644a77d7a3971d9dd17caec494ced43ffc535473b285b0f1507e

  • SHA512

    c3936a1943575b0bb9dfdf8fef0d9705fc08c275260ce8199b7ff13213b72173565e7c1a4dfd47bd4a5a592ce10749ff1dafe73ba0053c9bd8f7a8cee495407d

  • SSDEEP

    24576:WcvkT1s+3Z3aGWqKg0Ogj1OLHd+JwbMFdt6ATCRcaahwKHGaTKBupdl:hvkTq+3Z3ZWGsSHd+J+MFTsRcXnHGmKm

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

127.0.0.1:4782

rat94522.ddnsking.com:4000

Mutex

VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes
  • encryption_key

    WIwQFd2V7FhUXFH7QX71

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Signatures

  • Contains code to disable Windows Defender 13 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 4 IoCs
  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 13 IoCs
  • VenomRAT

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

  • Executes dropped EXE 3 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 7 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Delays execution with timeout.exe 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 51 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d5f6dbe3d6f5644a77d7a3971d9dd17caec494ced43ffc535473b285b0f1507e.exe
    "C:\Users\Admin\AppData\Local\Temp\d5f6dbe3d6f5644a77d7a3971d9dd17caec494ced43ffc535473b285b0f1507e.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:536
    • C:\Windows\system32\cmd.exe
      "C:\Windows\sysnative\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\F9AB.tmp\F9AC.tmp\F9AD.bat C:\Users\Admin\AppData\Local\Temp\d5f6dbe3d6f5644a77d7a3971d9dd17caec494ced43ffc535473b285b0f1507e.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1588
      • C:\Windows\system32\timeout.exe
        timeout 2
        3⤵
        • Delays execution with timeout.exe
        PID:1508
      • C:\Users\Admin\AppData\Local\Temp\Crypted.exe
        Crypted.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: CmdExeWriteProcessMemorySpam
        • Suspicious use of WriteProcessMemory
        PID:1720
        • C:\Users\Admin\AppData\Local\Temp\file1.exe
          C:\Users\Admin\AppData\Local\Temp\\file1.exe
          4⤵
          • Modifies Windows Defender Real-time Protection settings
          • Executes dropped EXE
          • Loads dropped DLL
          • Windows security modification
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:948
          • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
            "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:968
            • C:\Windows\SysWOW64\cmd.exe
              cmd /c ""C:\Users\Admin\AppData\Local\Temp\npE3nDjD9tNC.bat" "
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1688
              • C:\Windows\SysWOW64\chcp.com
                chcp 65001
                7⤵
                  PID:544
                • C:\Windows\SysWOW64\PING.EXE
                  ping -n 10 localhost
                  7⤵
                  • Runs ping.exe
                  PID:1568
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 968 -s 1536
                6⤵
                • Loads dropped DLL
                • Program crash
                PID:1516
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "powershell" Get-MpPreference -verbose
              5⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1800
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:820
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
                6⤵
                • Deletes itself
                PID:1676
            • C:\Windows\SysWOW64\cmd.exe
              cmd /c ""C:\Users\Admin\AppData\Local\Temp\LhFHkbNqAKi3.bat" "
              5⤵
                PID:1160

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      Modify Existing Service

      1
      T1031

      Defense Evasion

      Modify Registry

      2
      T1112

      Disabling Security Tools

      2
      T1089

      Discovery

      System Information Discovery

      1
      T1082

      Remote System Discovery

      1
      T1018

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\Crypted.exe
        Filesize

        1.3MB

        MD5

        bba9951ac1b09e948d1241d17ce26089

        SHA1

        9024729607388d44dff5c71892455d19a30dde49

        SHA256

        1d6a15c938c9fd1e0444ccf1d51b3de52ce59413b09d0c9fec77fb9b955a661d

        SHA512

        43c286f777832c3ce87d77393bc2a3f278cf9c788ccdae1b8794e583fd7360cad7bd1a720c3901af7ea953f8806cd6f59543850903719aea30cd711c8d55e492

      • C:\Users\Admin\AppData\Local\Temp\Crypted.exe
        Filesize

        1.3MB

        MD5

        bba9951ac1b09e948d1241d17ce26089

        SHA1

        9024729607388d44dff5c71892455d19a30dde49

        SHA256

        1d6a15c938c9fd1e0444ccf1d51b3de52ce59413b09d0c9fec77fb9b955a661d

        SHA512

        43c286f777832c3ce87d77393bc2a3f278cf9c788ccdae1b8794e583fd7360cad7bd1a720c3901af7ea953f8806cd6f59543850903719aea30cd711c8d55e492

      • C:\Users\Admin\AppData\Local\Temp\F9AB.tmp\F9AC.tmp\F9AD.bat
        Filesize

        72B

        MD5

        532fe973c7846cd45dd713eab9ccf5a2

        SHA1

        5c7ffe8a5f2ae88c6edc261e96dcdabbf9c357c6

        SHA256

        704862a14c3b03e464cde36c6dfff69bd6f835638a57ddcda697ccae2eaf620e

        SHA512

        fe3d666e611ab797fee9df860bf1719775d90e32d94b3b7d658c82e7e973790e360fb4294c76c169c4d26603b59347d9387bf0a16e143e69e9a34b7cfd6dfd27

      • C:\Users\Admin\AppData\Local\Temp\LhFHkbNqAKi3.bat
        Filesize

        202B

        MD5

        53045b2f5480553f51d75953226b6fb4

        SHA1

        8dad6ed9af47af2d7711902a254cfbef1ba318b8

        SHA256

        2dc16e2c756ec93e9dd3c3e56b6ee4b5e43bd31474b2365b3c5c8a57c9b155ff

        SHA512

        a0defbce1d6d2a84c5daee45df8ec53baeebf1893cb1d0d7169a9df8d9b71d8c538e699d6a62ce822adb3657b27eea046b781dda94c23fde87053444aebd2885

      • C:\Users\Admin\AppData\Local\Temp\file1.exe
        Filesize

        534KB

        MD5

        c3e9d09f741548288dae2d21cdd8d05a

        SHA1

        79245cec78e2793ba75cbadc88b30aebd13cf9d9

        SHA256

        0fe098471d1c513f29fbcd3a7c10deb467bb62aa35da59cca1b88b16f6c88db5

        SHA512

        cea14fa657f3779008fde0acdcf94880b26662a49009e2ac5fcdd85a6fc36d736df3d5e67af6ae6b20a76c6734dbc3a849433b002be9c803a62abd4d2ce3dbca

      • C:\Users\Admin\AppData\Local\Temp\file1.exe
        Filesize

        534KB

        MD5

        c3e9d09f741548288dae2d21cdd8d05a

        SHA1

        79245cec78e2793ba75cbadc88b30aebd13cf9d9

        SHA256

        0fe098471d1c513f29fbcd3a7c10deb467bb62aa35da59cca1b88b16f6c88db5

        SHA512

        cea14fa657f3779008fde0acdcf94880b26662a49009e2ac5fcdd85a6fc36d736df3d5e67af6ae6b20a76c6734dbc3a849433b002be9c803a62abd4d2ce3dbca

      • C:\Users\Admin\AppData\Local\Temp\npE3nDjD9tNC.bat
        Filesize

        207B

        MD5

        b83da8796fe92399f4b2eb63c358af36

        SHA1

        c43414177f29457e94dd0e8038749cfaef22a2e3

        SHA256

        9ba86945831fefbf2ed1f1b8d8e20767424d8de2715d1c64832c64b8d938e7fe

        SHA512

        1f2a43c4d275e0a35dde3c1842986387818b3b631983c6ef53310df8022270157f54c8caf173637904ab00057fee2cb20a55a589a48b40451ff4bf0033341f6a

      • C:\Users\Admin\AppData\Local\Temp\version.html
        Filesize

        19B

        MD5

        0aced8c91d43523ad097145bfbe021a1

        SHA1

        9d391623826590b6fa22b4257fcb5d760009faec

        SHA256

        03f309831b047eaace14ccb7d2ba00bf6279a2dbb0794f81f8d80c9df48ccbeb

        SHA512

        e06d01a8e19a1ac6e9e92967329ec8722af0d9f38d04585b87da905a473fe785aa4bb509416b39afa63b3d4ef35148f05a07dd5fb382b01e4a586e1a581a46a1

      • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        Filesize

        534KB

        MD5

        c3e9d09f741548288dae2d21cdd8d05a

        SHA1

        79245cec78e2793ba75cbadc88b30aebd13cf9d9

        SHA256

        0fe098471d1c513f29fbcd3a7c10deb467bb62aa35da59cca1b88b16f6c88db5

        SHA512

        cea14fa657f3779008fde0acdcf94880b26662a49009e2ac5fcdd85a6fc36d736df3d5e67af6ae6b20a76c6734dbc3a849433b002be9c803a62abd4d2ce3dbca

      • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        Filesize

        534KB

        MD5

        c3e9d09f741548288dae2d21cdd8d05a

        SHA1

        79245cec78e2793ba75cbadc88b30aebd13cf9d9

        SHA256

        0fe098471d1c513f29fbcd3a7c10deb467bb62aa35da59cca1b88b16f6c88db5

        SHA512

        cea14fa657f3779008fde0acdcf94880b26662a49009e2ac5fcdd85a6fc36d736df3d5e67af6ae6b20a76c6734dbc3a849433b002be9c803a62abd4d2ce3dbca

      • \Users\Admin\AppData\Local\Temp\file1.exe
        Filesize

        534KB

        MD5

        c3e9d09f741548288dae2d21cdd8d05a

        SHA1

        79245cec78e2793ba75cbadc88b30aebd13cf9d9

        SHA256

        0fe098471d1c513f29fbcd3a7c10deb467bb62aa35da59cca1b88b16f6c88db5

        SHA512

        cea14fa657f3779008fde0acdcf94880b26662a49009e2ac5fcdd85a6fc36d736df3d5e67af6ae6b20a76c6734dbc3a849433b002be9c803a62abd4d2ce3dbca

      • \Users\Admin\AppData\Roaming\SubDir\Client.exe
        Filesize

        534KB

        MD5

        c3e9d09f741548288dae2d21cdd8d05a

        SHA1

        79245cec78e2793ba75cbadc88b30aebd13cf9d9

        SHA256

        0fe098471d1c513f29fbcd3a7c10deb467bb62aa35da59cca1b88b16f6c88db5

        SHA512

        cea14fa657f3779008fde0acdcf94880b26662a49009e2ac5fcdd85a6fc36d736df3d5e67af6ae6b20a76c6734dbc3a849433b002be9c803a62abd4d2ce3dbca

      • \Users\Admin\AppData\Roaming\SubDir\Client.exe
        Filesize

        534KB

        MD5

        c3e9d09f741548288dae2d21cdd8d05a

        SHA1

        79245cec78e2793ba75cbadc88b30aebd13cf9d9

        SHA256

        0fe098471d1c513f29fbcd3a7c10deb467bb62aa35da59cca1b88b16f6c88db5

        SHA512

        cea14fa657f3779008fde0acdcf94880b26662a49009e2ac5fcdd85a6fc36d736df3d5e67af6ae6b20a76c6734dbc3a849433b002be9c803a62abd4d2ce3dbca

      • \Users\Admin\AppData\Roaming\SubDir\Client.exe
        Filesize

        534KB

        MD5

        c3e9d09f741548288dae2d21cdd8d05a

        SHA1

        79245cec78e2793ba75cbadc88b30aebd13cf9d9

        SHA256

        0fe098471d1c513f29fbcd3a7c10deb467bb62aa35da59cca1b88b16f6c88db5

        SHA512

        cea14fa657f3779008fde0acdcf94880b26662a49009e2ac5fcdd85a6fc36d736df3d5e67af6ae6b20a76c6734dbc3a849433b002be9c803a62abd4d2ce3dbca

      • \Users\Admin\AppData\Roaming\SubDir\Client.exe
        Filesize

        534KB

        MD5

        c3e9d09f741548288dae2d21cdd8d05a

        SHA1

        79245cec78e2793ba75cbadc88b30aebd13cf9d9

        SHA256

        0fe098471d1c513f29fbcd3a7c10deb467bb62aa35da59cca1b88b16f6c88db5

        SHA512

        cea14fa657f3779008fde0acdcf94880b26662a49009e2ac5fcdd85a6fc36d736df3d5e67af6ae6b20a76c6734dbc3a849433b002be9c803a62abd4d2ce3dbca

      • \Users\Admin\AppData\Roaming\SubDir\Client.exe
        Filesize

        534KB

        MD5

        c3e9d09f741548288dae2d21cdd8d05a

        SHA1

        79245cec78e2793ba75cbadc88b30aebd13cf9d9

        SHA256

        0fe098471d1c513f29fbcd3a7c10deb467bb62aa35da59cca1b88b16f6c88db5

        SHA512

        cea14fa657f3779008fde0acdcf94880b26662a49009e2ac5fcdd85a6fc36d736df3d5e67af6ae6b20a76c6734dbc3a849433b002be9c803a62abd4d2ce3dbca

      • \Users\Admin\AppData\Roaming\SubDir\Client.exe
        Filesize

        534KB

        MD5

        c3e9d09f741548288dae2d21cdd8d05a

        SHA1

        79245cec78e2793ba75cbadc88b30aebd13cf9d9

        SHA256

        0fe098471d1c513f29fbcd3a7c10deb467bb62aa35da59cca1b88b16f6c88db5

        SHA512

        cea14fa657f3779008fde0acdcf94880b26662a49009e2ac5fcdd85a6fc36d736df3d5e67af6ae6b20a76c6734dbc3a849433b002be9c803a62abd4d2ce3dbca

      • memory/536-54-0x0000000075CF1000-0x0000000075CF3000-memory.dmp
        Filesize

        8KB

      • memory/544-82-0x0000000000000000-mapping.dmp
      • memory/820-83-0x0000000000000000-mapping.dmp
      • memory/948-68-0x0000000000D90000-0x0000000000E1C000-memory.dmp
        Filesize

        560KB

      • memory/948-65-0x0000000000000000-mapping.dmp
      • memory/968-71-0x0000000000000000-mapping.dmp
      • memory/968-75-0x0000000001290000-0x000000000131C000-memory.dmp
        Filesize

        560KB

      • memory/1160-87-0x0000000000000000-mapping.dmp
      • memory/1508-57-0x0000000000000000-mapping.dmp
      • memory/1516-86-0x0000000000000000-mapping.dmp
      • memory/1568-85-0x0000000000000000-mapping.dmp
      • memory/1588-55-0x0000000000000000-mapping.dmp
      • memory/1676-84-0x0000000000000000-mapping.dmp
      • memory/1688-80-0x0000000000000000-mapping.dmp
      • memory/1720-61-0x0000000001220000-0x000000000127E000-memory.dmp
        Filesize

        376KB

      • memory/1720-59-0x0000000000000000-mapping.dmp
      • memory/1800-79-0x000000006F860000-0x000000006FE0B000-memory.dmp
        Filesize

        5.7MB

      • memory/1800-78-0x000000006F860000-0x000000006FE0B000-memory.dmp
        Filesize

        5.7MB

      • memory/1800-74-0x0000000000000000-mapping.dmp