Analysis

  • max time kernel
    129s
  • max time network
    127s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    25-09-2024 07:17

General

  • Target

    RustAnticheat.exe

  • Size

    1.1MB

  • MD5

    4439e9d53261db0779592ca29f67eb6f

  • SHA1

    648616ec60a680a0aea8635a2554b50aa2c438f0

  • SHA256

    d627c54671679d805505543153425de43feb8afe785fdd0ae56dcb5f942f505b

  • SHA512

    25d63d150a5da4649ccfb6687fd627f5e1c600d31810bd77545b6641dea71379ee45635ad52404b39672f1c60523d1022d4103b977b19e6d191b96ab9d56221f

  • SSDEEP

    24576:j/AN1n0EZ2ERiljRURFCD5Ku2bWp5EvAMq3YQB1AK2KGsBYDZUA8wB6:TAN1dZ28YjRLKuRpOAopK2KGsB6nB6

Malware Config

Extracted

Family

xworm

C2

web-amend.gl.at.ply.gg:59501

Attributes
  • Install_directory

    %Userprofile%

  • install_file

    USB.exe

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1288397778665607179/nAXAyuyyZRD7FWYpFsvWKeLD45mIOMzRzGIvC0NZ96M__pln0nZJGz6YCerIfEpPDzEs

Signatures

  • Detect Umbral payload 4 IoCs
  • Detect Xworm Payload 4 IoCs
  • Umbral

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

  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 7 IoCs
  • Adds Run key to start application 2 TTPs 1 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 Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Delays execution with timeout.exe 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 55 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\RustAnticheat.exe
    "C:\Users\Admin\AppData\Local\Temp\RustAnticheat.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2372
    • C:\Users\Admin\Loader (1).exe
      "C:\Users\Admin\Loader (1).exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:2800
    • C:\Users\Admin\RuntimeBroker.exe
      "C:\Users\Admin\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:2788
      • 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.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1924
      • 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
        • Suspicious use of AdjustPrivilegeToken
        PID:1656
      • 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
        • Suspicious use of AdjustPrivilegeToken
        PID:2312
      • 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
        • Suspicious use of AdjustPrivilegeToken
        PID:1976
      • 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:2384
      • C:\Users\Admin\AppData\Local\Temp\rnuycs.exe
        "C:\Users\Admin\AppData\Local\Temp\rnuycs.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2516
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2400
      • C:\Users\Admin\AppData\Local\Temp\kolott.exe
        "C:\Users\Admin\AppData\Local\Temp\kolott.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:2448
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          4⤵
            PID:2692
        • C:\Windows\System32\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /delete /f /tn "RuntimeBroker"
          3⤵
            PID:1512
          • C:\Windows\system32\cmd.exe
            cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp45D7.tmp.bat""
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:2816
            • C:\Windows\system32\timeout.exe
              timeout 3
              4⤵
              • Delays execution with timeout.exe
              PID:2524
        • C:\Users\Admin\Umbral.exe
          "C:\Users\Admin\Umbral.exe"
          2⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2680
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" csproduct get uuid
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2588
      • C:\Windows\system32\taskeng.exe
        taskeng.exe {0EE91EAA-5287-4C0B-9261-B53BE97BE369} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:2136
        • C:\Users\Admin\RuntimeBroker
          C:\Users\Admin\RuntimeBroker
          2⤵
          • Executes dropped EXE
          PID:1660
        • C:\Users\Admin\RuntimeBroker
          C:\Users\Admin\RuntimeBroker
          2⤵
          • Executes dropped EXE
          PID:2632

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\tmp45D7.tmp.bat

        Filesize

        146B

        MD5

        15abe39633a41120a26e9b5dace641b3

        SHA1

        497b036d56edf41acd7cad4d95794824e9c6e9cc

        SHA256

        e9ca1069724c4676352035c68835fdfdc2b568dacfdc031e3daf3d8f83863d2d

        SHA512

        cf1e2a73d601c9a7a443ac9efd8a8293a326fe3d166dccff238138a99d592e8d73a6db51701fe45514c3c831cc2e75311fd7f8f10af41c1a6530391883bea660

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

        Filesize

        7KB

        MD5

        f1b87b26d9ed2fb9bcf6108c5de0db70

        SHA1

        29d93166d8ae7fd5b9007f83f4f5de521d88698f

        SHA256

        6181a4eb42685be47ffac8229c8f8c7700f37c92fcccd6f7f0ae6e56a3b50795

        SHA512

        aa5b723283e7bb7be8d8ee093fb19f6c252fae7ab9e2fafdac2613204c58cf8b4551a000359fe6d0cbbac7b01e7a4315c2bd0833e34bb96f3313a1ba144b03d2

      • C:\Users\Admin\Loader (1).exe

        Filesize

        827KB

        MD5

        eefb801774c5ccb44153268a9357f5f1

        SHA1

        b1906b22e14edd142c52808ab3e5ba9346b85de5

        SHA256

        677aeb1981c58cba41a5d53ccbbf5b471e62dc49dc326570767da940560d840d

        SHA512

        1cf162fe6184d68dca514059d2de1123e80d0faac401765a54224aa5a987c9454bc92263fbec566835aa7b402f1f63ba59bb425ccc139e0a7391e66991f270b7

      • C:\Users\Admin\RuntimeBroker.exe

        Filesize

        77KB

        MD5

        7c4f97717ce74232ede2fc0b48956636

        SHA1

        d7dd219805af9fb9251214d598badc3d4d1b7bf8

        SHA256

        f84e5ceb6d0c53993bf5139e7e58dcc06c8cc7d6bc1e5e97171445f6fe01109d

        SHA512

        ad1963a20fc98927239eb1aaa6f881913ac5884c28c00b59637e4fd51dbafd376150e1e6a5cf8634f6a5610bd2286dc185b3f14362c06a613dfe40db528cea26

      • C:\Users\Admin\Umbral.exe

        Filesize

        229KB

        MD5

        756054196fc3e123b21c5e1e18199784

        SHA1

        74104b22cc47797253dc3a9920a1b85b2b6eb110

        SHA256

        80f484da3af4996f5e90fe93a32092b81361f9f84690492cb0532d6a0990e436

        SHA512

        458aa58813a4032d165b01b340e167b64849926fa5c64ebc08884c6045556b24da1091114a0876a541bfcee7243cc79c21d88a360f5f4ffd7d4555e7ae364c3b

      • memory/1656-36-0x0000000001E00000-0x0000000001E08000-memory.dmp

        Filesize

        32KB

      • memory/1656-35-0x000000001B6B0000-0x000000001B992000-memory.dmp

        Filesize

        2.9MB

      • memory/1660-65-0x0000000000F10000-0x0000000000F2A000-memory.dmp

        Filesize

        104KB

      • memory/1924-29-0x0000000001E80000-0x0000000001E88000-memory.dmp

        Filesize

        32KB

      • memory/1924-28-0x000000001B670000-0x000000001B952000-memory.dmp

        Filesize

        2.9MB

      • memory/1976-52-0x0000000001D10000-0x0000000001D18000-memory.dmp

        Filesize

        32KB

      • memory/1976-51-0x000000001B760000-0x000000001BA42000-memory.dmp

        Filesize

        2.9MB

      • memory/2312-43-0x000000001B700000-0x000000001B9E2000-memory.dmp

        Filesize

        2.9MB

      • memory/2312-44-0x00000000028E0000-0x00000000028E8000-memory.dmp

        Filesize

        32KB

      • memory/2372-0-0x000007FEF5DB3000-0x000007FEF5DB4000-memory.dmp

        Filesize

        4KB

      • memory/2372-1-0x00000000009D0000-0x0000000000AF4000-memory.dmp

        Filesize

        1.1MB

      • memory/2448-74-0x0000000001110000-0x0000000001150000-memory.dmp

        Filesize

        256KB

      • memory/2516-61-0x0000000001280000-0x00000000012C0000-memory.dmp

        Filesize

        256KB

      • memory/2632-68-0x0000000000FD0000-0x0000000000FEA000-memory.dmp

        Filesize

        104KB

      • memory/2680-18-0x0000000000AB0000-0x0000000000AF0000-memory.dmp

        Filesize

        256KB

      • memory/2788-19-0x00000000011F0000-0x000000000120A000-memory.dmp

        Filesize

        104KB

      • memory/2800-37-0x00000000002C0000-0x00000000002CA000-memory.dmp

        Filesize

        40KB

      • memory/2800-20-0x00000000010F0000-0x00000000011C6000-memory.dmp

        Filesize

        856KB

      • memory/2800-22-0x00000000002C0000-0x00000000002CA000-memory.dmp

        Filesize

        40KB

      • memory/2800-21-0x00000000002C0000-0x00000000002CA000-memory.dmp

        Filesize

        40KB