Analysis

  • max time kernel
    151s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-12-2023 00:33

General

  • Target

    380cd105672b970a3783c0036ebaf09d.exe

  • Size

    1.0MB

  • MD5

    380cd105672b970a3783c0036ebaf09d

  • SHA1

    112ee91c03921b1aaa3ca9b901054a62a11b0268

  • SHA256

    358b3681682b402dba9c1bf1297193fe257d8cc11e51c2924c657eb2057beb04

  • SHA512

    e3e7954328a98af7b4dd3ec0efa2c390f6d10b8e2037e582043902482f7e90241b0565c0da7972f14193efe517a305441306cb7c32b2f444ba5c58c1c7c5f2da

  • SSDEEP

    24576:Lw/UH7Q9OEKM4TbVOD6s6F+2iYNenwhhWZ0ZnLsm:FH7QAHTbVOD6sl2Zhh

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

SEP05

C2

23.105.131.187:7812

Mutex

VNM_MUTEX_mn3z5p1P4yabWtL9nJ

Attributes
  • encryption_key

    R5zGfMq4QEUio50PoLwo

  • install_name

    Windows Defender Security.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Update Service

  • subdirectory

    Windows Security Firewall

Signatures

  • Contains code to disable Windows Defender 1 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 1 IoCs
  • VenomRAT

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 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 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 60 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe
    "C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3064
    • C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe
      "C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe"
      2⤵
        PID:1324
      • C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe
        "C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe"
        2⤵
        • Modifies Windows Defender Real-time Protection settings
        • Checks computer location settings
        • Windows security modification
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2984
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks" /create /tn "Windows Update Service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:1840
        • C:\Users\Admin\AppData\Roaming\Windows Security Firewall\Windows Defender Security.exe
          "C:\Users\Admin\AppData\Roaming\Windows Security Firewall\Windows Defender Security.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:4088
          • C:\Users\Admin\AppData\Roaming\Windows Security Firewall\Windows Defender Security.exe
            "C:\Users\Admin\AppData\Roaming\Windows Security Firewall\Windows Defender Security.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:2304
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks" /create /tn "Windows Update Service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Security Firewall\Windows Defender Security.exe" /rl HIGHEST /f
              5⤵
              • Creates scheduled task(s)
              PID:3860
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "powershell" Get-MpPreference -verbose
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3884
        • 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:4840
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
            4⤵
              PID:1184
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\t13DzzvAF4Ff.bat" "
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:5052
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              4⤵
                PID:4908
              • C:\Windows\SysWOW64\PING.EXE
                ping -n 10 localhost
                4⤵
                • Runs ping.exe
                PID:1328
              • C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe
                "C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe"
                4⤵
                • Suspicious use of SetThreadContext
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                PID:652
                • C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe
                  "C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe"
                  5⤵
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3008
                • C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe
                  "C:\Users\Admin\AppData\Local\Temp\380cd105672b970a3783c0036ebaf09d.exe"
                  5⤵
                    PID:4748
          • C:\Windows\system32\BackgroundTransferHost.exe
            "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1
            1⤵
              PID:4908

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\380cd105672b970a3783c0036ebaf09d.exe.log

              Filesize

              507B

              MD5

              8cf94b5356be60247d331660005941ec

              SHA1

              fdedb361f40f22cb6a086c808fc0056d4e421131

              SHA256

              52a5b2d36f2b72cb02c695cf7ef46444dda73d4ea82a73e0894c805fa9987bc0

              SHA512

              b886dfc8bf03f8627f051fb6e2ac40ae2e7713584695a365728eb2e2c87217830029aa35bd129c642fa03dde3f7a7dd5690b16248676be60a6bb5f497fb23651

            • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pflxhsqz.rzv.ps1

              Filesize

              60B

              MD5

              d17fe0a3f47be24a6453e9ef58c94641

              SHA1

              6ab83620379fc69f80c0242105ddffd7d98d5d9d

              SHA256

              96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

              SHA512

              5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

            • C:\Users\Admin\AppData\Local\Temp\t13DzzvAF4Ff.bat

              Filesize

              229B

              MD5

              cfccfc8d6b470650d20c31147edfda14

              SHA1

              3612de925cbd08abefbad80b17204ce320056819

              SHA256

              5fabd80cd2ed45c8e369ab38f0a968d53125c04b7ea67e5e2f90d4a05d8f5595

              SHA512

              de223cb1aad72617ab87c453c78f5fd34ecbdb034850923d7447370ef843d81db5cdd4c21fa82aa364f845034d650bea0827a4d000b5f382d37668bb1dc526f0

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

              Filesize

              608KB

              MD5

              86fdf913f4a8f5d2942554967aadcd06

              SHA1

              9917132cb6f6af42563d076786cb8568f520e82c

              SHA256

              63594b21d8bea9108be42512b6f2c290169a3b755a5d9517469b9aeda999cafd

              SHA512

              c309d9a01f34c3478e3bc563d31da85ea60ea301e1fb3e5c10277e7dda21d7c80b463005afeed4e0d7bd5bf11d8a20905e700f44d72a95af9d4572982e1802ff

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

              Filesize

              157KB

              MD5

              ec9c3482e8078ff415519a41c5738c50

              SHA1

              01dab5954d5d52e60de39b63081e56be7a2a19ea

              SHA256

              9206075c82c96c0f4c0a6b8b16c1fa1694fd7ba2f8d5fce73eda524be550408c

              SHA512

              7bd56727e5737803209b62b2ed4a76f9506fc9c0e8ca795633eac8eff88f27b168a8d4b7dc9867a7942ec2a0b119cf61c7e2149eb5f5a761d402a4ceee9da6e9

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

              Filesize

              84KB

              MD5

              48fc60d3282c922e350e8d08457d7a51

              SHA1

              a9402f3f7d2d0ab665c15477d58c72a6882a59d2

              SHA256

              dddd2e8eca9806d28e0f720f911b54e53e92431de111d0a5b16ad7332a2f0a37

              SHA512

              bfad43be91b5b4f141381572fee957197f6b9eae08f300e417a0db41aee37d33fca2746a6b1be74b7d5c6b6175c56e56a069ba3e01c290a362363bf7681a6192

            • memory/652-84-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/652-86-0x0000000005080000-0x0000000005090000-memory.dmp

              Filesize

              64KB

            • memory/652-89-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/2304-50-0x00000000071D0000-0x00000000071DA000-memory.dmp

              Filesize

              40KB

            • memory/2304-85-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/2304-38-0x0000000005A00000-0x0000000005A10000-memory.dmp

              Filesize

              64KB

            • memory/2304-88-0x0000000005A00000-0x0000000005A10000-memory.dmp

              Filesize

              64KB

            • memory/2304-31-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/2984-9-0x0000000000400000-0x000000000048C000-memory.dmp

              Filesize

              560KB

            • memory/2984-16-0x0000000006D40000-0x0000000006D7C000-memory.dmp

              Filesize

              240KB

            • memory/2984-51-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/2984-15-0x00000000067C0000-0x00000000067D2000-memory.dmp

              Filesize

              72KB

            • memory/2984-14-0x0000000005BB0000-0x0000000005C16000-memory.dmp

              Filesize

              408KB

            • memory/2984-12-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/2984-83-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/2984-78-0x00000000057D0000-0x00000000057E0000-memory.dmp

              Filesize

              64KB

            • memory/3008-90-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/3008-91-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/3064-5-0x0000000005970000-0x0000000005A02000-memory.dmp

              Filesize

              584KB

            • memory/3064-3-0x00000000019F0000-0x00000000019FC000-memory.dmp

              Filesize

              48KB

            • memory/3064-2-0x00000000019C0000-0x00000000019D0000-memory.dmp

              Filesize

              64KB

            • memory/3064-1-0x0000000000EC0000-0x0000000000FC8000-memory.dmp

              Filesize

              1.0MB

            • memory/3064-13-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/3064-4-0x00000000060C0000-0x0000000006664000-memory.dmp

              Filesize

              5.6MB

            • memory/3064-0-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/3064-8-0x0000000005900000-0x000000000590A000-memory.dmp

              Filesize

              40KB

            • memory/3064-6-0x0000000005B10000-0x0000000005BAC000-memory.dmp

              Filesize

              624KB

            • memory/3884-45-0x0000000006430000-0x0000000006784000-memory.dmp

              Filesize

              3.3MB

            • memory/3884-71-0x0000000007E20000-0x0000000007E2E000-memory.dmp

              Filesize

              56KB

            • memory/3884-53-0x0000000006EB0000-0x0000000006EE2000-memory.dmp

              Filesize

              200KB

            • memory/3884-52-0x000000007F360000-0x000000007F370000-memory.dmp

              Filesize

              64KB

            • memory/3884-47-0x0000000006900000-0x000000000694C000-memory.dmp

              Filesize

              304KB

            • memory/3884-54-0x00000000706E0000-0x000000007072C000-memory.dmp

              Filesize

              304KB

            • memory/3884-64-0x0000000006E70000-0x0000000006E8E000-memory.dmp

              Filesize

              120KB

            • memory/3884-65-0x0000000007B00000-0x0000000007BA3000-memory.dmp

              Filesize

              652KB

            • memory/3884-67-0x0000000007BF0000-0x0000000007C0A000-memory.dmp

              Filesize

              104KB

            • memory/3884-66-0x0000000008230000-0x00000000088AA000-memory.dmp

              Filesize

              6.5MB

            • memory/3884-68-0x0000000007C60000-0x0000000007C6A000-memory.dmp

              Filesize

              40KB

            • memory/3884-69-0x0000000007E70000-0x0000000007F06000-memory.dmp

              Filesize

              600KB

            • memory/3884-70-0x0000000007DF0000-0x0000000007E01000-memory.dmp

              Filesize

              68KB

            • memory/3884-48-0x0000000005540000-0x0000000005550000-memory.dmp

              Filesize

              64KB

            • memory/3884-72-0x0000000007E30000-0x0000000007E44000-memory.dmp

              Filesize

              80KB

            • memory/3884-73-0x0000000007F30000-0x0000000007F4A000-memory.dmp

              Filesize

              104KB

            • memory/3884-74-0x0000000007F10000-0x0000000007F18000-memory.dmp

              Filesize

              32KB

            • memory/3884-77-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/3884-46-0x00000000068E0000-0x00000000068FE000-memory.dmp

              Filesize

              120KB

            • memory/3884-44-0x0000000006320000-0x0000000006386000-memory.dmp

              Filesize

              408KB

            • memory/3884-40-0x0000000005B00000-0x0000000005B22000-memory.dmp

              Filesize

              136KB

            • memory/3884-25-0x0000000005540000-0x0000000005550000-memory.dmp

              Filesize

              64KB

            • memory/3884-27-0x0000000005B80000-0x00000000061A8000-memory.dmp

              Filesize

              6.2MB

            • memory/3884-24-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/3884-26-0x0000000002FC0000-0x0000000002FF6000-memory.dmp

              Filesize

              216KB

            • memory/4088-32-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB

            • memory/4088-23-0x0000000004AD0000-0x0000000004AE0000-memory.dmp

              Filesize

              64KB

            • memory/4088-22-0x0000000075240000-0x00000000759F0000-memory.dmp

              Filesize

              7.7MB