Analysis

  • max time kernel
    108s
  • max time network
    138s
  • platform
    windows10-1703_x64
  • resource
    win10-20220718-en
  • resource tags

    arch:x64arch:x86image:win10-20220718-enlocale:en-usos:windows10-1703-x64system
  • submitted
    26-07-2022 23:18

General

  • Target

    c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b.exe

  • Size

    879KB

  • MD5

    3295138274c034c16522257d6c18f225

  • SHA1

    6f93c0800221d86ec8de5636195383f91cb9a336

  • SHA256

    c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b

  • SHA512

    7fb76b1bd0ec1d7e631c44d9cb82f06c6f2145b9a7797c5c8b18f3752bf18daec6ba57802bd178f630bcb9f9f20fc4486568a92e474d6499366e57f3e5bc81a3

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Bomboclat

C2

185.236.78.58:4782

Mutex

VNM_MUTEX_mtYiaCcGzveD5dsvgE

Attributes
  • encryption_key

    1WEWg6889GqBWLC1XKxQ

  • install_name

    WndowsSecurityUpdate.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Wndows Dfender Update Startup

  • subdirectory

    SubDir

Signatures

  • Contains code to disable Windows Defender 4 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 3 IoCs
  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 4 IoCs
  • VenomRAT

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

  • Executes dropped EXE 2 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.

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b.exe
    "C:\Users\Admin\AppData\Local\Temp\c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1264
    • C:\Users\Admin\AppData\Local\Temp\c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b.exe
      "{path}"
      2⤵
      • Modifies Windows Defender Real-time Protection settings
      • Windows security modification
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2504
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Wndows Dfender Update Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:3856
      • C:\Users\Admin\AppData\Roaming\SubDir\WndowsSecurityUpdate.exe
        "C:\Users\Admin\AppData\Roaming\SubDir\WndowsSecurityUpdate.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:592
        • C:\Users\Admin\AppData\Roaming\SubDir\WndowsSecurityUpdate.exe
          "{path}"
          4⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1992
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks" /create /tn "Wndows Dfender Update Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WndowsSecurityUpdate.exe" /rl HIGHEST /f
            5⤵
            • Creates scheduled task(s)
            PID:704
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "powershell" Get-MpPreference -verbose
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:696
      • 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:2628
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
          4⤵
            PID:3336
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\B7835FV4VeOS.bat" "
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:388
          • C:\Windows\SysWOW64\chcp.com
            chcp 65001
            4⤵
              PID:3376
            • C:\Windows\SysWOW64\PING.EXE
              ping -n 10 localhost
              4⤵
              • Runs ping.exe
              PID:1564
            • C:\Users\Admin\AppData\Local\Temp\c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b.exe
              "C:\Users\Admin\AppData\Local\Temp\c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b.exe"
              4⤵
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:2724
              • C:\Users\Admin\AppData\Local\Temp\c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b.exe
                "{path}"
                5⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1920

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        1KB

        MD5

        c3cc52ccca9ff2b6fa8d267fc350ca6b

        SHA1

        a68d4028333296d222e4afd75dea36fdc98d05f3

        SHA256

        3125b6071e2d78f575a06ed7ac32a83d9262ae64d1fa81ac43e8bfc1ef157c0e

        SHA512

        b0c7b2501b1a2c559795a9d178c0bbda0e03cbdbaaa2c4330ac1202a55373fe1b742078adcfa915bd6e805565a2daa6d35d64ef7a14ffcd09069f9ea6a691cc7

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b.exe.log

        Filesize

        1KB

        MD5

        c3cc52ccca9ff2b6fa8d267fc350ca6b

        SHA1

        a68d4028333296d222e4afd75dea36fdc98d05f3

        SHA256

        3125b6071e2d78f575a06ed7ac32a83d9262ae64d1fa81ac43e8bfc1ef157c0e

        SHA512

        b0c7b2501b1a2c559795a9d178c0bbda0e03cbdbaaa2c4330ac1202a55373fe1b742078adcfa915bd6e805565a2daa6d35d64ef7a14ffcd09069f9ea6a691cc7

      • C:\Users\Admin\AppData\Local\Temp\B7835FV4VeOS.bat

        Filesize

        261B

        MD5

        671cfb124cf3c1b68becb68a35d1559d

        SHA1

        409e3ba46c2421a500aa56bda3f6d5564d2fc25b

        SHA256

        9fc44cc9cebc3fc1e2f936364c64ccbd3b8255da400e1bcd13b313cc073ca40e

        SHA512

        8ea4f178a1791a19186a470b654604d3084b82f27518e01eb56cd7e7229e0545e0e256dff0e5906949686a6107fed90818ee271ec1fd5ae76acb1cb66eaeec5b

      • C:\Users\Admin\AppData\Roaming\SubDir\WndowsSecurityUpdate.exe

        Filesize

        879KB

        MD5

        3295138274c034c16522257d6c18f225

        SHA1

        6f93c0800221d86ec8de5636195383f91cb9a336

        SHA256

        c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b

        SHA512

        7fb76b1bd0ec1d7e631c44d9cb82f06c6f2145b9a7797c5c8b18f3752bf18daec6ba57802bd178f630bcb9f9f20fc4486568a92e474d6499366e57f3e5bc81a3

      • C:\Users\Admin\AppData\Roaming\SubDir\WndowsSecurityUpdate.exe

        Filesize

        879KB

        MD5

        3295138274c034c16522257d6c18f225

        SHA1

        6f93c0800221d86ec8de5636195383f91cb9a336

        SHA256

        c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b

        SHA512

        7fb76b1bd0ec1d7e631c44d9cb82f06c6f2145b9a7797c5c8b18f3752bf18daec6ba57802bd178f630bcb9f9f20fc4486568a92e474d6499366e57f3e5bc81a3

      • C:\Users\Admin\AppData\Roaming\SubDir\WndowsSecurityUpdate.exe

        Filesize

        879KB

        MD5

        3295138274c034c16522257d6c18f225

        SHA1

        6f93c0800221d86ec8de5636195383f91cb9a336

        SHA256

        c063f14a72b49e90fe7862e4402540c2227abf2f063c9a8f63af90d4a6ab5e5b

        SHA512

        7fb76b1bd0ec1d7e631c44d9cb82f06c6f2145b9a7797c5c8b18f3752bf18daec6ba57802bd178f630bcb9f9f20fc4486568a92e474d6499366e57f3e5bc81a3

      • memory/388-781-0x0000000000000000-mapping.dmp

      • memory/592-286-0x0000000000000000-mapping.dmp

      • memory/696-417-0x0000000008000000-0x0000000008076000-memory.dmp

        Filesize

        472KB

      • memory/696-409-0x0000000007900000-0x0000000007C50000-memory.dmp

        Filesize

        3.3MB

      • memory/696-431-0x0000000009050000-0x000000000906E000-memory.dmp

        Filesize

        120KB

      • memory/696-430-0x0000000009070000-0x00000000090A3000-memory.dmp

        Filesize

        204KB

      • memory/696-444-0x0000000009380000-0x0000000009414000-memory.dmp

        Filesize

        592KB

      • memory/696-413-0x0000000007CF0000-0x0000000007D3B000-memory.dmp

        Filesize

        300KB

      • memory/696-412-0x0000000007110000-0x000000000712C000-memory.dmp

        Filesize

        112KB

      • memory/696-440-0x00000000091B0000-0x0000000009255000-memory.dmp

        Filesize

        660KB

      • memory/696-408-0x0000000006FA0000-0x0000000007006000-memory.dmp

        Filesize

        408KB

      • memory/696-405-0x0000000006F00000-0x0000000006F22000-memory.dmp

        Filesize

        136KB

      • memory/696-381-0x00000000071D0000-0x00000000077F8000-memory.dmp

        Filesize

        6.2MB

      • memory/696-366-0x00000000044C0000-0x00000000044F6000-memory.dmp

        Filesize

        216KB

      • memory/696-647-0x0000000009320000-0x000000000933A000-memory.dmp

        Filesize

        104KB

      • memory/696-289-0x0000000000000000-mapping.dmp

      • memory/696-652-0x0000000009310000-0x0000000009318000-memory.dmp

        Filesize

        32KB

      • memory/704-779-0x0000000000000000-mapping.dmp

      • memory/1264-144-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-182-0x00000000085E0000-0x000000000869C000-memory.dmp

        Filesize

        752KB

      • memory/1264-143-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-117-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-145-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-146-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-147-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-148-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-149-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-150-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-151-0x0000000000D20000-0x0000000000E02000-memory.dmp

        Filesize

        904KB

      • memory/1264-152-0x0000000005C50000-0x000000000614E000-memory.dmp

        Filesize

        5.0MB

      • memory/1264-153-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-154-0x0000000005640000-0x00000000056D2000-memory.dmp

        Filesize

        584KB

      • memory/1264-155-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-156-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-157-0x00000000057F0000-0x000000000588C000-memory.dmp

        Filesize

        624KB

      • memory/1264-158-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-159-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-160-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-161-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-162-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-163-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-164-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-165-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-166-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-167-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-168-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-169-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-170-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-171-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-172-0x0000000005620000-0x000000000562A000-memory.dmp

        Filesize

        40KB

      • memory/1264-173-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-174-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-175-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-176-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-177-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-178-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-179-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-180-0x00000000057B0000-0x00000000057BA000-memory.dmp

        Filesize

        40KB

      • memory/1264-181-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-142-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-183-0x000000000AF50000-0x000000000B006000-memory.dmp

        Filesize

        728KB

      • memory/1264-118-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-119-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-120-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-121-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-189-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-122-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-141-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-123-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-124-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-125-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-126-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-140-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-139-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-138-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-137-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-136-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-135-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-134-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-133-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-132-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-131-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-130-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-129-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-128-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1264-127-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/1564-822-0x0000000000000000-mapping.dmp

      • memory/1920-904-0x0000000000486C6E-mapping.dmp

      • memory/1992-701-0x0000000000486C6E-mapping.dmp

      • memory/2504-184-0x0000000000400000-0x00000000004B6000-memory.dmp

        Filesize

        728KB

      • memory/2504-264-0x0000000006660000-0x000000000669E000-memory.dmp

        Filesize

        248KB

      • memory/2504-243-0x0000000005670000-0x0000000005682000-memory.dmp

        Filesize

        72KB

      • memory/2504-233-0x0000000005230000-0x0000000005296000-memory.dmp

        Filesize

        408KB

      • memory/2504-188-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/2504-187-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/2504-186-0x0000000077A50000-0x0000000077BDE000-memory.dmp

        Filesize

        1.6MB

      • memory/2504-185-0x0000000000486C6E-mapping.dmp

      • memory/2628-686-0x0000000000000000-mapping.dmp

      • memory/2724-845-0x0000000000000000-mapping.dmp

      • memory/3336-692-0x0000000000000000-mapping.dmp

      • memory/3376-813-0x0000000000000000-mapping.dmp

      • memory/3856-266-0x0000000000000000-mapping.dmp