Analysis

  • max time kernel
    105s
  • max time network
    162s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    12-05-2022 11:56

General

  • Target

    0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c.exe

  • Size

    602KB

  • MD5

    f78e8fdb5c76c784818c1ea7ba8217cd

  • SHA1

    9a3ca4ab923d8b93b49f5d46c6b449845ca94c6d

  • SHA256

    0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c

  • SHA512

    9fc70809bac9189e693af1ccd10f35af84fe295b048ed609262a90bf071157b0a23ff2672c57f424fbcd56fc816c1400b6a9a09cd30e12619d785518151d62b3

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

windows security

C2

vilvaraj-32652.portmap.io:32652

Mutex

VNM_MUTEX_XaCO2YtLAsadylDHBP

Attributes
  • encryption_key

    eKgGUbCubcSIafuOAN5V

  • 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.

  • suricata: ET MALWARE Common RAT Connectivity Check Observed

    suricata: ET MALWARE Common RAT Connectivity Check Observed

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 6 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 3 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.

  • 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.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c.exe
    "C:\Users\Admin\AppData\Local\Temp\0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1684
    • C:\Users\Admin\AppData\Local\Temp\0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c.exe
      "C:\Users\Admin\AppData\Local\Temp\0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c.exe"
      2⤵
      • Loads dropped DLL
      • Windows security modification
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:924
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "windows security" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:268
      • C:\Users\Admin\AppData\Roaming\SubDir\windows security.exe
        "C:\Users\Admin\AppData\Roaming\SubDir\windows security.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1916
        • C:\Users\Admin\AppData\Roaming\SubDir\windows security.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\windows security.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1492
          • 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
            5⤵
            • Creates scheduled task(s)
            PID:1928
          • C:\Windows\SysWOW64\cmd.exe
            cmd /c ""C:\Users\Admin\AppData\Local\Temp\L938PigSap1o.bat" "
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:956
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              6⤵
                PID:1580
              • C:\Windows\SysWOW64\PING.EXE
                ping -n 10 localhost
                6⤵
                • Runs ping.exe
                PID:1604
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 1488
              5⤵
              • Loads dropped DLL
              • Program crash
              PID:1688
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "powershell" Get-MpPreference -verbose
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1616
        • 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:1884
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
            4⤵
              PID:1100
          • C:\Windows\SysWOW64\cmd.exe
            cmd /c ""C:\Users\Admin\AppData\Local\Temp\6j6GSYRIa6B1.bat" "
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:1712
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              4⤵
                PID:1968
              • C:\Windows\SysWOW64\PING.EXE
                ping -n 10 localhost
                4⤵
                • Runs ping.exe
                PID:1364
              • C:\Users\Admin\AppData\Local\Temp\0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c.exe
                "C:\Users\Admin\AppData\Local\Temp\0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c.exe"
                4⤵
                • Suspicious use of SetThreadContext
                PID:1256
                • C:\Users\Admin\AppData\Local\Temp\0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c.exe
                  "C:\Users\Admin\AppData\Local\Temp\0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c.exe"
                  5⤵
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1600

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\6j6GSYRIa6B1.bat

          Filesize

          261B

          MD5

          ad9bc946160af0bff36cd484d1eb65b0

          SHA1

          7c28c98dee707951009d5c9f7f46ebd126cf2ca2

          SHA256

          d1cad1fe088f3e27a0600481d350a6dc90f8bc854da8a7429d0a10816dd744d4

          SHA512

          9aa7bcadceeffd8db4af06d61442bd5a95d9bbcdb0c3a9f285b31d4a5bf859badbdbf7d43bb68dc9d4bc6766d71fbef97f1323061d4303d55aea2c49e31560b8

        • C:\Users\Admin\AppData\Local\Temp\L938PigSap1o.bat

          Filesize

          217B

          MD5

          e07b13a98ad5a6c1709f45c78e30203e

          SHA1

          415dbf8dbbab1ad1ced630db22ecc2383e50f4ff

          SHA256

          8366de71475f92ea65646749a82febb2aadfb28549e7a2573ea0239ae7e9c62e

          SHA512

          b1e7b4e70c727db76e9e615c398d64f150bbb5bc3dd0f010ab8c8a677913bfe27b9b395ec319cd2fdf6f86aa4cde3c5e3f3f5cfff4eabd5149001bda36f2d524

        • C:\Users\Admin\AppData\Roaming\SubDir\windows security.exe

          Filesize

          602KB

          MD5

          f78e8fdb5c76c784818c1ea7ba8217cd

          SHA1

          9a3ca4ab923d8b93b49f5d46c6b449845ca94c6d

          SHA256

          0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c

          SHA512

          9fc70809bac9189e693af1ccd10f35af84fe295b048ed609262a90bf071157b0a23ff2672c57f424fbcd56fc816c1400b6a9a09cd30e12619d785518151d62b3

        • C:\Users\Admin\AppData\Roaming\SubDir\windows security.exe

          Filesize

          602KB

          MD5

          f78e8fdb5c76c784818c1ea7ba8217cd

          SHA1

          9a3ca4ab923d8b93b49f5d46c6b449845ca94c6d

          SHA256

          0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c

          SHA512

          9fc70809bac9189e693af1ccd10f35af84fe295b048ed609262a90bf071157b0a23ff2672c57f424fbcd56fc816c1400b6a9a09cd30e12619d785518151d62b3

        • C:\Users\Admin\AppData\Roaming\SubDir\windows security.exe

          Filesize

          602KB

          MD5

          f78e8fdb5c76c784818c1ea7ba8217cd

          SHA1

          9a3ca4ab923d8b93b49f5d46c6b449845ca94c6d

          SHA256

          0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c

          SHA512

          9fc70809bac9189e693af1ccd10f35af84fe295b048ed609262a90bf071157b0a23ff2672c57f424fbcd56fc816c1400b6a9a09cd30e12619d785518151d62b3

        • \Users\Admin\AppData\Roaming\SubDir\windows security.exe

          Filesize

          602KB

          MD5

          f78e8fdb5c76c784818c1ea7ba8217cd

          SHA1

          9a3ca4ab923d8b93b49f5d46c6b449845ca94c6d

          SHA256

          0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c

          SHA512

          9fc70809bac9189e693af1ccd10f35af84fe295b048ed609262a90bf071157b0a23ff2672c57f424fbcd56fc816c1400b6a9a09cd30e12619d785518151d62b3

        • \Users\Admin\AppData\Roaming\SubDir\windows security.exe

          Filesize

          602KB

          MD5

          f78e8fdb5c76c784818c1ea7ba8217cd

          SHA1

          9a3ca4ab923d8b93b49f5d46c6b449845ca94c6d

          SHA256

          0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c

          SHA512

          9fc70809bac9189e693af1ccd10f35af84fe295b048ed609262a90bf071157b0a23ff2672c57f424fbcd56fc816c1400b6a9a09cd30e12619d785518151d62b3

        • \Users\Admin\AppData\Roaming\SubDir\windows security.exe

          Filesize

          602KB

          MD5

          f78e8fdb5c76c784818c1ea7ba8217cd

          SHA1

          9a3ca4ab923d8b93b49f5d46c6b449845ca94c6d

          SHA256

          0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c

          SHA512

          9fc70809bac9189e693af1ccd10f35af84fe295b048ed609262a90bf071157b0a23ff2672c57f424fbcd56fc816c1400b6a9a09cd30e12619d785518151d62b3

        • \Users\Admin\AppData\Roaming\SubDir\windows security.exe

          Filesize

          602KB

          MD5

          f78e8fdb5c76c784818c1ea7ba8217cd

          SHA1

          9a3ca4ab923d8b93b49f5d46c6b449845ca94c6d

          SHA256

          0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c

          SHA512

          9fc70809bac9189e693af1ccd10f35af84fe295b048ed609262a90bf071157b0a23ff2672c57f424fbcd56fc816c1400b6a9a09cd30e12619d785518151d62b3

        • \Users\Admin\AppData\Roaming\SubDir\windows security.exe

          Filesize

          602KB

          MD5

          f78e8fdb5c76c784818c1ea7ba8217cd

          SHA1

          9a3ca4ab923d8b93b49f5d46c6b449845ca94c6d

          SHA256

          0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c

          SHA512

          9fc70809bac9189e693af1ccd10f35af84fe295b048ed609262a90bf071157b0a23ff2672c57f424fbcd56fc816c1400b6a9a09cd30e12619d785518151d62b3

        • \Users\Admin\AppData\Roaming\SubDir\windows security.exe

          Filesize

          602KB

          MD5

          f78e8fdb5c76c784818c1ea7ba8217cd

          SHA1

          9a3ca4ab923d8b93b49f5d46c6b449845ca94c6d

          SHA256

          0e0a586e4c7a3d6508de4cffe0c78050c01dda128441853127ef10e1e3c7e25c

          SHA512

          9fc70809bac9189e693af1ccd10f35af84fe295b048ed609262a90bf071157b0a23ff2672c57f424fbcd56fc816c1400b6a9a09cd30e12619d785518151d62b3

        • memory/924-58-0x0000000000400000-0x000000000048C000-memory.dmp

          Filesize

          560KB

        • memory/924-57-0x0000000000400000-0x000000000048C000-memory.dmp

          Filesize

          560KB

        • memory/924-65-0x0000000000400000-0x000000000048C000-memory.dmp

          Filesize

          560KB

        • memory/924-60-0x0000000000400000-0x000000000048C000-memory.dmp

          Filesize

          560KB

        • memory/924-67-0x0000000000400000-0x000000000048C000-memory.dmp

          Filesize

          560KB

        • memory/924-61-0x0000000000400000-0x000000000048C000-memory.dmp

          Filesize

          560KB

        • memory/924-62-0x0000000000400000-0x000000000048C000-memory.dmp

          Filesize

          560KB

        • memory/1256-109-0x0000000001030000-0x00000000010CC000-memory.dmp

          Filesize

          624KB

        • memory/1616-101-0x000000006EED0000-0x000000006F47B000-memory.dmp

          Filesize

          5.7MB

        • memory/1684-56-0x0000000000410000-0x000000000041A000-memory.dmp

          Filesize

          40KB

        • memory/1684-55-0x0000000075761000-0x0000000075763000-memory.dmp

          Filesize

          8KB

        • memory/1684-54-0x0000000000F70000-0x000000000100C000-memory.dmp

          Filesize

          624KB

        • memory/1916-74-0x0000000001080000-0x000000000111C000-memory.dmp

          Filesize

          624KB