Analysis

  • max time kernel
    147s
  • max time network
    142s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-01-2025 16:22

General

  • Target

    RustAnticheat.exe

  • Size

    1.1MB

  • MD5

    2fbbfbb74dc5aaadcfd211cfeffe2436

  • SHA1

    fabe364aa9a454fd4222a65208cc6e0ea20a055b

  • SHA256

    20f227a3b9bb4366e5f33adc724f6bfe729148984dc320985a306099b9fa2f81

  • SHA512

    f10ccf004653b8e8a05168b7045fd14247ca4d2e5d4917990129f5e9d0b8b3404bf19ae551e2cab3aaf0808d968c178b5b9b41df6e4527e11d8a3d2ab5e438ca

  • SSDEEP

    24576:Ubgge3IgtiIefG+2xzN0Vx0Pn+ugXDHonXKmbolhyr9hv3V:Ue3IgwqJCfBrLo6mbolhq3V

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1324773241721454592/0bNkfJfnFLKYK9qsZKNX46VZrdz9_Q66rDPONU09Nh8_1RKAs7tIVY9WGoMFggyLSmFd

Extracted

Family

xworm

C2

say-bands.gl.at.ply.gg:41697

Attributes
  • Install_directory

    %Userprofile%

  • install_file

    RuntimeBroker.exe

Signatures

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

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

  • Umbral family
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Xworm family
  • Command and Scripting Interpreter: PowerShell 1 TTPs 8 IoCs

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

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

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 5 IoCs
  • Reads user/profile data of web browsers 3 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 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).

  • 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.

  • 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 20 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 43 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\RustAnticheat.exe
    "C:\Users\Admin\AppData\Local\Temp\RustAnticheat.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3052
    • C:\Users\Admin\AppData\Roaming\Loader (1).exe
      "C:\Users\Admin\AppData\Roaming\Loader (1).exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of FindShellTrayWindow
      PID:1476
    • C:\Users\Admin\AppData\Roaming\RustCheack.exe
      "C:\Users\Admin\AppData\Roaming\RustCheack.exe"
      2⤵
      • Checks computer location settings
      • 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:2304
      • 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\RustCheack.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:568
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RustCheack.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2308
      • 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:3720
      • 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:2972
      • 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.exe"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1672
    • C:\Users\Admin\AppData\Roaming\Umbral.exe
      "C:\Users\Admin\AppData\Roaming\Umbral.exe"
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4920
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2892
      • C:\Windows\SYSTEM32\attrib.exe
        "attrib.exe" +h +s "C:\Users\Admin\AppData\Roaming\Umbral.exe"
        3⤵
        • Views/modifies file attributes
        PID:1848
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Umbral.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4824
      • 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:1408
      • 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:2320
      • 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:5084
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" os get Caption
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:892
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" computersystem get totalphysicalmemory
        3⤵
          PID:1164
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          3⤵
            PID:2368
          • 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:4624
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic" path win32_VideoController get name
            3⤵
            • Detects videocard installed
            PID:3088
          • C:\Windows\SYSTEM32\cmd.exe
            "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Roaming\Umbral.exe" && pause
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Suspicious use of WriteProcessMemory
            PID:4868
            • C:\Windows\system32\PING.EXE
              ping localhost
              4⤵
              • System Network Configuration Discovery: Internet Connection Discovery
              • Runs ping.exe
              PID:2008
      • C:\Users\Admin\RuntimeBroker.exe
        C:\Users\Admin\RuntimeBroker.exe
        1⤵
        • Executes dropped EXE
        PID:1032
      • C:\Users\Admin\RuntimeBroker.exe
        C:\Users\Admin\RuntimeBroker.exe
        1⤵
        • Executes dropped EXE
        PID:1696

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        654B

        MD5

        2ff39f6c7249774be85fd60a8f9a245e

        SHA1

        684ff36b31aedc1e587c8496c02722c6698c1c4e

        SHA256

        e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

        SHA512

        1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

      • 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

        88be3bc8a7f90e3953298c0fdbec4d72

        SHA1

        f4969784ad421cc80ef45608727aacd0f6bf2e4b

        SHA256

        533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

        SHA512

        4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

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

        Filesize

        944B

        MD5

        f9ceadd5a37282b98bb6859c91222632

        SHA1

        074dbaa9de6c6894464c336506e79e1b942774c3

        SHA256

        fe762147b6a85172ea43e33504f8b8faa0e5e3e1389bcc72893604fd87dbe9ab

        SHA512

        f4a107ea936e1d8c9953c9dc1857cab08c3fa2006f3f821e3f902466ded54f7f3fc89721829aa0bd0b2cec0d6f46631bee8cc496f505d09f994574fc23ddb70a

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

        Filesize

        944B

        MD5

        10890cda4b6eab618e926c4118ab0647

        SHA1

        1e1d63b73a0e6c7575f458b3c7917a9ce5ba776d

        SHA256

        00f8a035324d39bd62e6dee5e1b480069015471c487ebee4479e6990ea9ddb14

        SHA512

        a2ee84006c24a36f25e0bca0772430d64e3791f233da916aecdeae6712763e77d55bbbd00dc8f6b2b3887f3c26ab3980b96c5f46cc823e81e28abbbc5fc78221

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

        Filesize

        944B

        MD5

        993af531f0b57e8128ec273731c3a8e2

        SHA1

        a42ea55876f4f390837dd2c95fb7ff2344b6e9e1

        SHA256

        fff934d70d813381536d272c5b8ac6ad70acd054267b13592da767c9bd1dda62

        SHA512

        bdf5970ff2ee314dc297fce5c0f44765e77acbf269cd9ad9e7448a391d5f80d66a0c5426f99bc3480851e8763413aa180b3b3b6b22ef0e86a365450cb8c334e4

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

        Filesize

        944B

        MD5

        6d42b6da621e8df5674e26b799c8e2aa

        SHA1

        ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

        SHA256

        5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

        SHA512

        53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

        Filesize

        948B

        MD5

        985b3105d8889886d6fd953575c54e08

        SHA1

        0f9a041240a344d82bac0a180520e7982c15f3cd

        SHA256

        5178fdd457eb3eb25c8f72ed4c22c582a83de0d324db66d0446d660f226e944d

        SHA512

        0fd59bc4886b70aa3b7eeeaa23229b7fdc93410ca7f8452860e4a1bbda2559eaa5e4b05c3ec2d85f7d648daf3c16741f4c2c18f2dd3bae4cc4a4e57ae4f665b0

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lyspx1pb.enm.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Roaming\Loader (1).exe

        Filesize

        827KB

        MD5

        eefb801774c5ccb44153268a9357f5f1

        SHA1

        b1906b22e14edd142c52808ab3e5ba9346b85de5

        SHA256

        677aeb1981c58cba41a5d53ccbbf5b471e62dc49dc326570767da940560d840d

        SHA512

        1cf162fe6184d68dca514059d2de1123e80d0faac401765a54224aa5a987c9454bc92263fbec566835aa7b402f1f63ba59bb425ccc139e0a7391e66991f270b7

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

        Filesize

        77KB

        MD5

        aa503a26fcb9e14b90e0e6913ec68957

        SHA1

        678629ebaa7ec15ce726c28b4a9596427b0f29a5

        SHA256

        86d4817a7af82350e9cde59d0938a797d762abdd3f9d1bf2d47d4008fecbc2a5

        SHA512

        19db8b42492fbed5968c1083672cbc31faa60f44d64a19ed608e3602bb413573e9834d4e92db6ee324f43f48001e1b89f6dd3c935ae10e7e2be8107996583440

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

        Filesize

        232KB

        MD5

        c1e4b555821d2cd22adc1f4bd409aac3

        SHA1

        d18aa95ed3dc98ce3981708ff1b16e4979e543d3

        SHA256

        563fc2d2f357a3ecd5c194fdba4f64b9c01b24cdc38c6c50c6b46c72ccab66a4

        SHA512

        57c5bf37a28b19677d3ae01eb1b4766e268966686ab44f830c85763308ed9cc530f73b45ec8ebff6bdfa4f905c77439e1044e86e714b117feaed6aef0b9c3de4

      • memory/1476-40-0x0000000000090000-0x0000000000166000-memory.dmp

        Filesize

        856KB

      • memory/1476-42-0x00000000086C0000-0x00000000086F8000-memory.dmp

        Filesize

        224KB

      • memory/1476-43-0x00000000086A0000-0x00000000086AE000-memory.dmp

        Filesize

        56KB

      • memory/2304-179-0x00007FFE6D830000-0x00007FFE6E2F1000-memory.dmp

        Filesize

        10.8MB

      • memory/2304-38-0x00007FFE6D830000-0x00007FFE6E2F1000-memory.dmp

        Filesize

        10.8MB

      • memory/2304-37-0x0000000000840000-0x000000000085A000-memory.dmp

        Filesize

        104KB

      • memory/3052-0-0x00007FFE6D833000-0x00007FFE6D835000-memory.dmp

        Filesize

        8KB

      • memory/3052-1-0x00000000006D0000-0x00000000007F4000-memory.dmp

        Filesize

        1.1MB

      • memory/4824-44-0x000001FE663A0000-0x000001FE663C2000-memory.dmp

        Filesize

        136KB

      • memory/4920-70-0x00000181F1C10000-0x00000181F1C86000-memory.dmp

        Filesize

        472KB

      • memory/4920-132-0x00000181F1BB0000-0x00000181F1BC2000-memory.dmp

        Filesize

        72KB

      • memory/4920-131-0x00000181F1930000-0x00000181F193A000-memory.dmp

        Filesize

        40KB

      • memory/4920-72-0x00000181F1CE0000-0x00000181F1CFE000-memory.dmp

        Filesize

        120KB

      • memory/4920-71-0x00000181F1C90000-0x00000181F1CE0000-memory.dmp

        Filesize

        320KB

      • memory/4920-178-0x00007FFE6D830000-0x00007FFE6E2F1000-memory.dmp

        Filesize

        10.8MB

      • memory/4920-36-0x00000181EF4B0000-0x00000181EF4F0000-memory.dmp

        Filesize

        256KB

      • memory/4920-39-0x00007FFE6D830000-0x00007FFE6E2F1000-memory.dmp

        Filesize

        10.8MB