Analysis

  • max time kernel
    63s
  • max time network
    131s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-10-2022 06:20

General

  • Target

    dac30ab400ec6be2daa29718ea6d0a3e.exe

  • Size

    867KB

  • MD5

    dac30ab400ec6be2daa29718ea6d0a3e

  • SHA1

    06320ebc648623885645657fd2a72a728f2441cd

  • SHA256

    93361aea837c73c75f9067700572262e69d1cfbfa6634e7ea8f249701e1fdebb

  • SHA512

    67f360d49625822199c133981c4077d88d9ec2347386858f33d08d6b6f37c15af0c56cf9772e0fb819072ab4b63b13eb334237ccd727ce91cad9b68ab47ec58c

  • SSDEEP

    12288:3ARp0gFW4q6AD9/Gz8hQOFPA/OcMowPzQvEXpqCctQHNM:2igFW4qbx/GY7Y/jw7tICct4a

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

asdf

C2

checkme12.freeddns.org:1604

Mutex

VNM_MUTEX_yidaALoSEROfTPWHwX

Attributes
  • encryption_key

    TbfVFQWqb0uiZoBjJ9E9

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    UPX

Signatures

  • Contains code to disable Windows Defender 2 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 2 IoCs
  • VenomRAT

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

  • Executes dropped EXE 1 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 1 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dac30ab400ec6be2daa29718ea6d0a3e.exe
    "C:\Users\Admin\AppData\Local\Temp\dac30ab400ec6be2daa29718ea6d0a3e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:696
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
      2⤵
      • Modifies Windows Defender Real-time Protection settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4628
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:4576
      • C:\Users\Admin\AppData\Roaming\UPX\Client.exe
        "C:\Users\Admin\AppData\Roaming\UPX\Client.exe"
        3⤵
        • Executes dropped EXE
        PID:884
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "powershell" Get-MpPreference -verbose
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3192
      • 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:4300
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
          4⤵
            PID:1960
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\v8mvSo8j2hYg.bat" "
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4784
          • C:\Windows\SysWOW64\chcp.com
            chcp 65001
            4⤵
              PID:820
            • C:\Windows\SysWOW64\PING.EXE
              ping -n 10 localhost
              4⤵
              • Runs ping.exe
              PID:1360
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
              4⤵
                PID:1696

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\RegSvcs.exe.log

          Filesize

          1KB

          MD5

          10eab9c2684febb5327b6976f2047587

          SHA1

          a12ed54146a7f5c4c580416aecb899549712449e

          SHA256

          f49dbd55029bfbc15134f7c6a4f967d6c39142c63f2e8f1f8c78fab108a2c928

          SHA512

          7e5fd90fffae723bd0c662a90e0730b507805f072771ee673d1d8c262dbf60c8a03ba5fe088f699a97c2e886380de158b2ccd59ee62e3d012dd6dd14ea9d0e50

        • C:\Users\Admin\AppData\Local\Temp\v8mvSo8j2hYg.bat

          Filesize

          216B

          MD5

          7ad57d45ccea056eada4e5199eb69c8b

          SHA1

          fd0654a529df5f1e4519163d3552165d16be38d3

          SHA256

          f66a53af94370927ffad4d564e3e61dda37839cd48f9ab5bbfb5cef7e76cae24

          SHA512

          35a33200429a29f8a6ff9a99df69c754cb2b52fa6bd84c02a026d18184ecd62d461e1405bea2eeea47fa2fc432f2002115c9c6cf06663964aad2761917144049

        • C:\Users\Admin\AppData\Roaming\UPX\Client.exe

          Filesize

          44KB

          MD5

          9d352bc46709f0cb5ec974633a0c3c94

          SHA1

          1969771b2f022f9a86d77ac4d4d239becdf08d07

          SHA256

          2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390

          SHA512

          13c714244ec56beeb202279e4109d59c2a43c3cf29f90a374a751c04fd472b45228ca5a0178f41109ed863dbd34e0879e4a21f5e38ae3d89559c57e6be990a9b

        • C:\Users\Admin\AppData\Roaming\UPX\Client.exe

          Filesize

          44KB

          MD5

          9d352bc46709f0cb5ec974633a0c3c94

          SHA1

          1969771b2f022f9a86d77ac4d4d239becdf08d07

          SHA256

          2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390

          SHA512

          13c714244ec56beeb202279e4109d59c2a43c3cf29f90a374a751c04fd472b45228ca5a0178f41109ed863dbd34e0879e4a21f5e38ae3d89559c57e6be990a9b

        • memory/884-147-0x0000000002DE0000-0x0000000002E1C000-memory.dmp

          Filesize

          240KB

        • memory/884-146-0x0000000000A60000-0x0000000000A6E000-memory.dmp

          Filesize

          56KB

        • memory/3192-152-0x0000000006810000-0x000000000682E000-memory.dmp

          Filesize

          120KB

        • memory/3192-154-0x000000006FA80000-0x000000006FACC000-memory.dmp

          Filesize

          304KB

        • memory/3192-162-0x0000000007E40000-0x0000000007E48000-memory.dmp

          Filesize

          32KB

        • memory/3192-148-0x0000000002E70000-0x0000000002EA6000-memory.dmp

          Filesize

          216KB

        • memory/3192-149-0x0000000005A80000-0x00000000060A8000-memory.dmp

          Filesize

          6.2MB

        • memory/3192-150-0x00000000057F0000-0x0000000005812000-memory.dmp

          Filesize

          136KB

        • memory/3192-151-0x00000000059D0000-0x0000000005A36000-memory.dmp

          Filesize

          408KB

        • memory/3192-153-0x0000000006DE0000-0x0000000006E12000-memory.dmp

          Filesize

          200KB

        • memory/3192-161-0x0000000007E60000-0x0000000007E7A000-memory.dmp

          Filesize

          104KB

        • memory/3192-155-0x0000000006DC0000-0x0000000006DDE000-memory.dmp

          Filesize

          120KB

        • memory/3192-156-0x0000000008160000-0x00000000087DA000-memory.dmp

          Filesize

          6.5MB

        • memory/3192-157-0x0000000007B20000-0x0000000007B3A000-memory.dmp

          Filesize

          104KB

        • memory/3192-158-0x0000000007B90000-0x0000000007B9A000-memory.dmp

          Filesize

          40KB

        • memory/3192-159-0x0000000007DA0000-0x0000000007E36000-memory.dmp

          Filesize

          600KB

        • memory/3192-160-0x0000000007D50000-0x0000000007D5E000-memory.dmp

          Filesize

          56KB

        • memory/4628-140-0x0000000006810000-0x000000000684C000-memory.dmp

          Filesize

          240KB

        • memory/4628-139-0x00000000063E0000-0x00000000063F2000-memory.dmp

          Filesize

          72KB

        • memory/4628-138-0x00000000057E0000-0x0000000005846000-memory.dmp

          Filesize

          408KB

        • memory/4628-137-0x0000000005440000-0x00000000054D2000-memory.dmp

          Filesize

          584KB

        • memory/4628-136-0x00000000058F0000-0x0000000005E94000-memory.dmp

          Filesize

          5.6MB

        • memory/4628-135-0x0000000000400000-0x000000000048C000-memory.dmp

          Filesize

          560KB