Resubmissions

14/01/2025, 04:24

250114-e1k7payngl10

14/01/2025, 03:04

250114-dkkesaxmar10

Analysis

  • max time kernel
    873s
  • max time network
    874s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/01/2025, 04:24

General

  • Target
    3d79293d371d3393d83f0d6205c35263baa3618a6f3ccba4fcefbee999d4a714.exe
  • Size 16.0MB
  • Sample250114-e1k7payngl
  • SHA256 3d79293d371d3393d83f0d6205c35263baa3618a6f3ccba4fcefbee999d4a714
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Dcrat family
  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Process spawned unexpected child process 6 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

  • Disables Task Manager via registry modification
  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Executes dropped EXE 6 IoCs
  • Adds Run key to start application 2 TTPs 5 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Modifies registry class 2 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 6 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 34 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\3d79293d371d3393d83f0d6205c35263baa3618a6f3ccba4fcefbee999d4a714.exe
    C:\Users\Admin\AppData\Local\Temp\3d79293d371d3393d83f0d6205c35263baa3618a6f3ccba4fcefbee999d4a714.exe cmd /c %SIGILL% "SIGTERM|DELETE|SIGKILL"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:5064
    • 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\Temp\XenoSetup(1).exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3068
    • C:\Users\Admin\AppData\Local\Temp\XenoSetup(1).exe
      "C:\Users\Admin\AppData\Local\Temp\XenoSetup(1).exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:2616
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\portBrokerDll\2jfojLJgRy.vbe"
        3⤵
        • Checks computer location settings
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3992
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\portBrokerDll\Ac4k16M5JuZ3cBUzCeuZfRwt20LYrImECkDEo2qhe7JRV.bat" "
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:4644
          • C:\Windows\SysWOW64\reg.exe
            reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Modifies registry key
            PID:2736
          • C:\portBrokerDll\DriverbrokerCrtDhcp.exe
            "C:\portBrokerDll/DriverbrokerCrtDhcp.exe"
            5⤵
            • Modifies WinLogon for persistence
            • Checks computer location settings
            • Executes dropped EXE
            • Adds Run key to start application
            • Drops file in Windows directory
            • Modifies registry class
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:4744
            • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
              "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\gaflx5im\gaflx5im.cmdline"
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1764
              • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
                C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES4457.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC6B99FC13CA8D42688EE717FCB55797.TMP"
                7⤵
                  PID:1840
              • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
                "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\qvhmnu1w\qvhmnu1w.cmdline"
                6⤵
                • Drops file in System32 directory
                • Suspicious use of WriteProcessMemory
                PID:2836
                • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
                  C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES44B5.tmp" "c:\Windows\System32\CSC308B1DE35F5B453CADB9F330A57645E.TMP"
                  7⤵
                    PID:4196
                • C:\Windows\System32\cmd.exe
                  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\PvwO9nGGIO.bat"
                  6⤵
                  • Suspicious use of WriteProcessMemory
                  PID:3208
                  • C:\Windows\system32\chcp.com
                    chcp 65001
                    7⤵
                      PID:2064
                    • C:\Windows\system32\w32tm.exe
                      w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                      7⤵
                        PID:3100
                      • C:\Windows\System32Local\sysmon.exe
                        "C:\Windows\System32Local\sysmon.exe"
                        7⤵
                        • Executes dropped EXE
                        • Suspicious use of AdjustPrivilegeToken
                        PID:1824
            • C:\Users\Admin\AppData\Local\Temp\Xeno.exe
              "C:\Users\Admin\AppData\Local\Temp\Xeno.exe"
              2⤵
              • Executes dropped EXE
              PID:3964
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 14 /tr "'C:\Windows\System32Local\sysmon.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2660
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\System32Local\sysmon.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1732
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 14 /tr "'C:\Windows\System32Local\sysmon.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1868
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "DriverbrokerCrtDhcpD" /sc MINUTE /mo 6 /tr "'C:\portBrokerDll\DriverbrokerCrtDhcp.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:3592
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "DriverbrokerCrtDhcp" /sc ONLOGON /tr "'C:\portBrokerDll\DriverbrokerCrtDhcp.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1196
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "DriverbrokerCrtDhcpD" /sc MINUTE /mo 11 /tr "'C:\portBrokerDll\DriverbrokerCrtDhcp.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:468
          • C:\portBrokerDll\DriverbrokerCrtDhcp.exe
            C:\portBrokerDll\DriverbrokerCrtDhcp.exe
            1⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            PID:1976
          • C:\Windows\System32Local\sysmon.exe
            C:\Windows\System32Local\sysmon.exe
            1⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            PID:1052

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

                DriverbrokerCrtDhcp.exe.log

                • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\DriverbrokerCrtDhcp.exe.log
                • Size 1KB
                • SHA256 fbbf9453956534a33bd6f75f61926c50fd62bfca4976b818ccca5b8260fd4917
                • MD5 SHA1 SHA512

                sysmon.exe.log

                • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\sysmon.exe.log
                • Size 1KB
                • SHA256 eb70c64ae99d14ac2588b7a84854fbf3c420532d7fe4dfd49c7b5a70c869943a
                • MD5 SHA1 SHA512

                PvwO9nGGIO.bat

                • Path C:\Users\Admin\AppData\Local\Temp\PvwO9nGGIO.bat
                • Size 211B
                • SHA256 c928387b2d74d2b1975ffa8feb9994fa99995200fc80a54bb86959d0dff9113b
                • MD5 SHA1 SHA512

                RES4457.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\RES4457.tmp
                • Size 1KB
                • SHA256 c7dee4ba7963ecbe39af523128047077ed3d9785bb4aa9a739b39f196286b0b7
                • MD5 SHA1 SHA512

                RES44B5.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\RES44B5.tmp
                • Size 1KB
                • SHA256 7aefac78cb5d293b357c23449e3572f9efa65cb2976a0872a1f4e62ee83eeb45
                • MD5 SHA1 SHA512

                Xeno.exe

                • Path C:\Users\Admin\AppData\Local\Temp\Xeno.exe
                • Size 3.5MB
                • SHA256 4d3b4ef0ec929ebd649637f55aabd856954e3d6424ac337a17ee4bb65ec2e8f3
                • MD5 SHA1 SHA512 SSDEEP

                XenoSetup(1).exe

                • Path C:\Users\Admin\AppData\Local\Temp\XenoSetup(1).exe
                • Size 3.5MB
                • SHA256 eae94b757fe5e150f8f1039140feebc969788bd2c0ef7fe2d4675a81f6dc9898
                • MD5 SHA1 SHA512 SSDEEP

                __PSScriptPolicyTest_pdzqbmbn.ywa.ps1

                • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pdzqbmbn.ywa.ps1
                • Size 60B
                • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                • MD5 SHA1 SHA512

                2jfojLJgRy.vbe

                • Path C:\portBrokerDll\2jfojLJgRy.vbe
                • Size 237B
                • SHA256 5d612089c06bbe2b32de8bfcc3e0ba1e0ef2155cd6cde83b280797c6061ca269
                • MD5 SHA1 SHA512

                Ac4k16M5JuZ3cBUzCeuZfRwt20LYrImECkDEo2qhe7JRV.bat

                • Path C:\portBrokerDll\Ac4k16M5JuZ3cBUzCeuZfRwt20LYrImECkDEo2qhe7JRV.bat
                • Size 194B
                • SHA256 3041cc5e5c4251ea1eddccaa5d145446719d6e86dcfd3bc40bc23c80b3102ec2
                • MD5 SHA1 SHA512

                DriverbrokerCrtDhcp.exe

                • Path C:\portBrokerDll\DriverbrokerCrtDhcp.exe
                • Size 3.3MB
                • SHA256 884de0ba4d113a1674b112f76b7d6af9bb11c562d6b58155e974e549694e0f58
                • MD5 SHA1 SHA512 SSDEEP

                CSC6B99FC13CA8D42688EE717FCB55797.TMP

                • Path \??\c:\Users\Admin\AppData\Local\Temp\CSC6B99FC13CA8D42688EE717FCB55797.TMP
                • Size 1KB
                • SHA256 37aac241c050fb90090b36441ae1f198d11a0da4ee5f30e3332673f3c6ecf40a
                • MD5 SHA1 SHA512

                gaflx5im.0.cs

                • Path \??\c:\Users\Admin\AppData\Local\Temp\gaflx5im\gaflx5im.0.cs
                • Size 387B
                • SHA256 4161c0df6e9d4e0d890c4a7a52be7cd0c074d2ae2ee07b336186e03a3a35d7ff
                • MD5 SHA1 SHA512

                gaflx5im.cmdline

                • Path \??\c:\Users\Admin\AppData\Local\Temp\gaflx5im\gaflx5im.cmdline
                • Size 255B
                • SHA256 ba5e98f1b56d3d5f11ccde3f6fbfc82766f3711f5e946c416c024c3e6b7bd20c
                • MD5 SHA1 SHA512

                qvhmnu1w.0.cs

                • Path \??\c:\Users\Admin\AppData\Local\Temp\qvhmnu1w\qvhmnu1w.0.cs
                • Size 367B
                • SHA256 bab2e58ba522c329c8278832739d88c64236612bcf32607e214f30181136dbf0
                • MD5 SHA1 SHA512

                qvhmnu1w.cmdline

                • Path \??\c:\Users\Admin\AppData\Local\Temp\qvhmnu1w\qvhmnu1w.cmdline
                • Size 235B
                • SHA256 cfe27792b1a9c25c6e9b60d2a4ed86f308315ee090fd84845a13bfa7fc6bdad5
                • MD5 SHA1 SHA512

                CSC308B1DE35F5B453CADB9F330A57645E.TMP

                • Path \??\c:\Windows\System32\CSC308B1DE35F5B453CADB9F330A57645E.TMP
                • Size 1KB
                • SHA256 e20e4619dbc932a216fd93f86fe0af2e915f4c2ba6177fc3581da59885094476
                • MD5 SHA1 SHA512

                memory/3068-17-0x00007FFE00F30000-0x00007FFE019F1000-memory.dmp

                memory/3068-14-0x00007FFE00F30000-0x00007FFE019F1000-memory.dmp

                memory/3068-13-0x00007FFE00F30000-0x00007FFE019F1000-memory.dmp

                memory/3068-12-0x00007FFE00F30000-0x00007FFE019F1000-memory.dmp

                memory/3068-10-0x000002C027C60000-0x000002C027C82000-memory.dmp

                memory/4744-109-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-3622-0x0000000002470000-0x0000000002480000-memory.dmp

                memory/4744-87-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-83-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-81-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-79-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-78-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-75-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-71-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-69-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-67-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-65-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-59-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-57-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-55-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-63-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-97-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-115-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-113-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-111-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-91-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-107-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-105-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-103-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-101-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-99-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-117-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-3611-0x0000000002440000-0x0000000002466000-memory.dmp

                memory/4744-3613-0x00000000022D0000-0x00000000022DE000-memory.dmp

                memory/4744-3615-0x0000000002490000-0x00000000024AC000-memory.dmp

                memory/4744-3616-0x000000001AE00000-0x000000001AE50000-memory.dmp

                memory/4744-3618-0x00000000022E0000-0x00000000022F0000-memory.dmp

                memory/4744-3620-0x000000001ADB0000-0x000000001ADC8000-memory.dmp

                memory/4744-89-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-3624-0x0000000002480000-0x0000000002490000-memory.dmp

                memory/4744-3626-0x00000000024B0000-0x00000000024BE000-memory.dmp

                memory/4744-3628-0x000000001ADD0000-0x000000001ADDC000-memory.dmp

                memory/4744-3630-0x000000001ADE0000-0x000000001ADEE000-memory.dmp

                memory/4744-3632-0x000000001AE70000-0x000000001AE82000-memory.dmp

                memory/4744-3634-0x000000001ADF0000-0x000000001AE00000-memory.dmp

                memory/4744-3636-0x000000001B340000-0x000000001B356000-memory.dmp

                memory/4744-3638-0x000000001B360000-0x000000001B372000-memory.dmp

                memory/4744-3639-0x000000001C790000-0x000000001CCB8000-memory.dmp

                memory/4744-3641-0x000000001AE50000-0x000000001AE5E000-memory.dmp

                memory/4744-3643-0x000000001AE60000-0x000000001AE70000-memory.dmp

                memory/4744-3645-0x000000001B380000-0x000000001B390000-memory.dmp

                memory/4744-3647-0x000000001C2C0000-0x000000001C31A000-memory.dmp

                memory/4744-3649-0x000000001B390000-0x000000001B39E000-memory.dmp

                memory/4744-3651-0x000000001B3A0000-0x000000001B3B0000-memory.dmp

                memory/4744-3653-0x000000001B3B0000-0x000000001B3BE000-memory.dmp

                memory/4744-3655-0x000000001C280000-0x000000001C298000-memory.dmp

                memory/4744-3657-0x000000001B3C0000-0x000000001B3CC000-memory.dmp

                memory/4744-3659-0x000000001C370000-0x000000001C3BE000-memory.dmp

                memory/4744-93-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-95-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-85-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-73-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-61-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-54-0x000000001AEA0000-0x000000001B239000-memory.dmp

                memory/4744-53-0x000000001AEA0000-0x000000001B240000-memory.dmp

                memory/4744-52-0x0000000000210000-0x0000000000218000-memory.dmp

                memory/5064-19-0x00007FFE00F30000-0x00007FFE019F1000-memory.dmp

                memory/5064-1-0x0000000000AC0000-0x0000000000E42000-memory.dmp

                memory/5064-0-0x00007FFE00F33000-0x00007FFE00F35000-memory.dmp

                memory/5064-38-0x00007FFE00F30000-0x00007FFE019F1000-memory.dmp