Analysis

  • max time kernel
    140s
  • max time network
    202s
  • 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/Properties/IndependenciesInstallation.bat

  • Size

    489B

  • MD5

    d8da01fb6f6288b044868f85228cbb10

  • SHA1

    9d08c813ce59ab863c6ec3c68c336eed265c5e8a

  • SHA256

    74416d022dde876ff622038a6359907da239bbd26ceb7024f5d39dd52f16c9de

  • SHA512

    c92b83ba5513694e05cf908a747609dd6fd3c70944d04a9b8a62939f4372561e4feb567d158b0316853c50a0c241a1c8c075875746a1e538912ea91ff84c308e

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 use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 49 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\Properties\IndependenciesInstallation.bat"
    1⤵
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3220
    • C:\Windows\system32\timeout.exe
      timeout /t 5
      2⤵
      • Delays execution with timeout.exe
      PID:3188
    • C:\Windows\system32\timeout.exe
      timeout /t 1
      2⤵
      • Delays execution with timeout.exe
      PID:4492
    • C:\Windows\system32\timeout.exe
      timeout /t 3
      2⤵
      • Delays execution with timeout.exe
      PID:3180
    • C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\msgbox.vbs"
      2⤵
        PID:5024
      • C:\Windows\system32\timeout.exe
        timeout /t 4
        2⤵
        • Delays execution with timeout.exe
        PID:4200
      • C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\C11Setup.exe
        C11Setup.exe
        2⤵
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:4232
      • C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe
        GuiLoader.exe
        2⤵
        • Drops file in Drivers directory
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2088
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3996
        • C:\Windows\SYSTEM32\attrib.exe
          "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe"
          3⤵
          • Views/modifies file attributes
          PID:4052
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe'
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3760
        • 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
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2260
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2728
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3540
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" os get Caption
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3444
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" computersystem get totalphysicalmemory
          3⤵
            PID:4856
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" csproduct get uuid
            3⤵
              PID:3392
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
              3⤵
                PID:3864
              • C:\Windows\System32\Wbem\wmic.exe
                "wmic" path win32_VideoController get name
                3⤵
                • Detects videocard installed
                PID:3304
              • 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
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:3720
                • C:\Windows\system32\PING.EXE
                  ping localhost
                  4⤵
                  • Runs ping.exe
                  PID:2488
            • C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\PageEditor.exe
              PageEditor.exe
              2⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:4576
              • C:\Users\Admin\AppData\Local\Temp\C11Setup.exe
                "C:\Users\Admin\AppData\Local\Temp\C11Setup.exe"
                3⤵
                • Drops startup file
                • Executes dropped EXE
                • Adds Run key to start application
                • Suspicious use of WriteProcessMemory
                PID:248
                • C:\Windows\SysWOW64\netsh.exe
                  netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\C11Setup.exe" "C11Setup.exe" ENABLE
                  4⤵
                  • Modifies Windows Firewall
                  PID:572

          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

            38ecc5b95c11e5a77558753102979c51

            SHA1

            c0759b08ef377df9979d8835d8a7e464cd8eaf6b

            SHA256

            2eb69abe0af5a2fb5bb313533cef641e25016876b874353f7d737c7ad672c79e

            SHA512

            9bf4ce3bc097bdd0242bd105c936a9c9403d5ac83ec99e6a310591a7b8d26309485f3e0cdc4cba67c322f834c325a2b63a008adb078f3a3307094c4b68a48686

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

            Filesize

            944B

            MD5

            e3840d9bcedfe7017e49ee5d05bd1c46

            SHA1

            272620fb2605bd196df471d62db4b2d280a363c6

            SHA256

            3ac83e70415b9701ee71a4560232d7998e00c3db020fde669eb01b8821d2746f

            SHA512

            76adc88ab3930acc6b8b7668e2de797b8c00edcfc41660ee4485259c72a8adf162db62c2621ead5a9950f12bfe8a76ccab79d02fda11860afb0e217812cac376

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

            Filesize

            948B

            MD5

            6bddc96a32b9ed8fc70b141ccf4a39b2

            SHA1

            0f33c0699da40a5eadcec646791cf21cdb0dd7c6

            SHA256

            cb3853abe77eb0da8a1caccb49e97a573b6f35570722eb759116a645d724c132

            SHA512

            e41f1597b4129b759e4199db195df1c24e47cc47dc9850fab2d48e44bc3d37dc3658fbfbb62332a0b93c552587d7fab09de1634f605faa2209b8470c2a6eaca6

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

            Filesize

            1KB

            MD5

            7332074ae2b01262736b6fbd9e100dac

            SHA1

            22f992165065107cc9417fa4117240d84414a13c

            SHA256

            baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

            SHA512

            4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

          • 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_ep0wicug.bl0.ps1

            Filesize

            60B

            MD5

            d17fe0a3f47be24a6453e9ef58c94641

            SHA1

            6ab83620379fc69f80c0242105ddffd7d98d5d9d

            SHA256

            96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

            SHA512

            5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

          • memory/248-135-0x0000000001200000-0x0000000001210000-memory.dmp

            Filesize

            64KB

          • memory/248-134-0x0000000074730000-0x0000000074CE1000-memory.dmp

            Filesize

            5.7MB

          • memory/248-113-0x0000000074730000-0x0000000074CE1000-memory.dmp

            Filesize

            5.7MB

          • memory/248-112-0x0000000001200000-0x0000000001210000-memory.dmp

            Filesize

            64KB

          • memory/248-111-0x0000000074730000-0x0000000074CE1000-memory.dmp

            Filesize

            5.7MB

          • memory/248-136-0x0000000074730000-0x0000000074CE1000-memory.dmp

            Filesize

            5.7MB

          • memory/2088-48-0x000002536E7D0000-0x000002536E820000-memory.dmp

            Filesize

            320KB

          • memory/2088-47-0x000002536E850000-0x000002536E8C6000-memory.dmp

            Filesize

            472KB

          • memory/2088-98-0x000002536E820000-0x000002536E832000-memory.dmp

            Filesize

            72KB

          • memory/2088-8-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/2088-76-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/2088-0-0x0000025354030000-0x0000025354074000-memory.dmp

            Filesize

            272KB

          • memory/2088-5-0x000002536E570000-0x000002536E580000-memory.dmp

            Filesize

            64KB

          • memory/2088-132-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/2088-49-0x000002536E8D0000-0x000002536E8EE000-memory.dmp

            Filesize

            120KB

          • memory/2088-97-0x000002536E540000-0x000002536E54A000-memory.dmp

            Filesize

            40KB

          • memory/2088-42-0x000002536E570000-0x000002536E580000-memory.dmp

            Filesize

            64KB

          • memory/2260-28-0x00000219BC400000-0x00000219BC410000-memory.dmp

            Filesize

            64KB

          • memory/2260-43-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/2260-39-0x00000219BC400000-0x00000219BC410000-memory.dmp

            Filesize

            64KB

          • memory/2260-29-0x00000219BC400000-0x00000219BC410000-memory.dmp

            Filesize

            64KB

          • memory/2260-27-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/2728-66-0x0000022A97070000-0x0000022A97080000-memory.dmp

            Filesize

            64KB

          • memory/2728-79-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/2728-64-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/2728-65-0x0000022A97070000-0x0000022A97080000-memory.dmp

            Filesize

            64KB

          • memory/3540-81-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/3540-83-0x000001B171AC0000-0x000001B171AD0000-memory.dmp

            Filesize

            64KB

          • memory/3540-82-0x000001B171AC0000-0x000001B171AD0000-memory.dmp

            Filesize

            64KB

          • memory/3540-95-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/3540-93-0x000001B171AC0000-0x000001B171AD0000-memory.dmp

            Filesize

            64KB

          • memory/3760-22-0x00000255D6BF0000-0x00000255D6C00000-memory.dmp

            Filesize

            64KB

          • memory/3760-20-0x00000255D6B60000-0x00000255D6B82000-memory.dmp

            Filesize

            136KB

          • memory/3760-10-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/3760-25-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/3760-11-0x00000255D6BF0000-0x00000255D6C00000-memory.dmp

            Filesize

            64KB

          • memory/3760-21-0x00000255D6BF0000-0x00000255D6C00000-memory.dmp

            Filesize

            64KB

          • memory/3864-127-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/3864-125-0x00000210595B0000-0x00000210595C0000-memory.dmp

            Filesize

            64KB

          • memory/3864-115-0x00000210595B0000-0x00000210595C0000-memory.dmp

            Filesize

            64KB

          • memory/3864-114-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/4232-9-0x00007FF86C020000-0x00007FF86C229000-memory.dmp

            Filesize

            2.0MB

          • memory/4232-1-0x0000000000D90000-0x0000000000DD4000-memory.dmp

            Filesize

            272KB

          • memory/4232-40-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/4232-50-0x0000000001610000-0x0000000001620000-memory.dmp

            Filesize

            64KB

          • memory/4232-80-0x00007FF86C020000-0x00007FF86C229000-memory.dmp

            Filesize

            2.0MB

          • memory/4232-4-0x0000000001610000-0x0000000001620000-memory.dmp

            Filesize

            64KB

          • memory/4232-3-0x00007FF84B1D0000-0x00007FF84BC92000-memory.dmp

            Filesize

            10.8MB

          • memory/4576-110-0x0000000074730000-0x0000000074CE1000-memory.dmp

            Filesize

            5.7MB

          • memory/4576-44-0x0000000074730000-0x0000000074CE1000-memory.dmp

            Filesize

            5.7MB

          • memory/4576-51-0x0000000074730000-0x0000000074CE1000-memory.dmp

            Filesize

            5.7MB

          • memory/4576-77-0x00000000008D0000-0x00000000008E0000-memory.dmp

            Filesize

            64KB

          • memory/4576-7-0x0000000074730000-0x0000000074CE1000-memory.dmp

            Filesize

            5.7MB

          • memory/4576-6-0x0000000074730000-0x0000000074CE1000-memory.dmp

            Filesize

            5.7MB