Analysis

  • max time kernel
    148s
  • max time network
    134s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    21/08/2026, 11:12

General

  • Target
    exe.exe
  • Size 2.9MB
  • Sample260821-nav4msydrh
  • SHA256 2e8b7a738ae3982c77f5751b4be096be2841167625190c245b7fb1858cd4ccd5
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: DcRat

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

  • DCRat payload 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Looks up external IP address via web service 1 TTPs 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs
  • Drops file in Program Files directory 6 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • 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.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Modifies registry class 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\exe.exe
    "C:\Users\Admin\AppData\Local\Temp\exe.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:5604
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\ComcontainerSession\QXOxC7m7bDPPkgkvCappPoYma6Hu9G9i3un0C9o5Lri5Xn.vbe"
      2⤵
      • Executes a VBScript file via the Windows Script Host.
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5664
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ComcontainerSession\Bgs4QmuzpNkE3eFhZ7BSNDwJfhFcfUXAGAWI61Y9XalSRMbtbge.bat" "
        3⤵
        • Executes a command shell one-liner
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:5944
        • C:\Windows\SysWOW64\cmd.exe
          cmd
          4⤵
          • System Location Discovery: System Language Discovery
          PID:5092
        • C:\Users\Admin\AppData\Local\Temp\ComcontainerSession\bridgeagentWebRef.exe
          "C:\Users\Admin\AppData\Local\Temp\ComcontainerSession/bridgeagentWebRef.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Drops file in Windows directory
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:5620
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Prefetch\Registry.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of AdjustPrivilegeToken
            PID:3736
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Windows Media Player\en-US\SearchHost.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of AdjustPrivilegeToken
            PID:3380
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Windows Photo Viewer\de-DE\Idle.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of AdjustPrivilegeToken
            PID:3540
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\services.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of AdjustPrivilegeToken
            PID:5712
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\fontdrvhost.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of AdjustPrivilegeToken
            PID:5392
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\ComcontainerSession\bridgeagentWebRef.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of AdjustPrivilegeToken
            PID:396
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\zB9IPyyWT1.bat"
            5⤵
            • Executes a command shell one-liner
            • Suspicious use of WriteProcessMemory
            PID:420
            • C:\Windows\system32\chcp.com
              chcp 65001
              6⤵
                PID:5000
              • C:\Windows\system32\PING.EXE
                ping -n 10 localhost
                6⤵
                • System Network Configuration Discovery: Internet Connection Discovery
                • Runs ping.exe
                PID:3412
              • C:\Windows\Prefetch\Registry.exe
                "C:\Windows\Prefetch\Registry.exe"
                6⤵
                • Executes dropped EXE
                PID:5592

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 1KB
          • SHA256 58245b535bb164e85943800b4154e0128260c1a510da112294f1c53edfbfbf07
          • MD5 SHA1 SHA512 TLSH

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 1KB
          • SHA256 e56f4a38e0c60f0196c589e1952198368a10927e65ff24d1476ffafc489657f4
          • MD5 SHA1 SHA512 TLSH

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 1KB
          • SHA256 a976a31824c3a0cc2a6b0fd9ec6045c398d82990e5e96df2ad86ba09a9b05be5
          • MD5 SHA1 SHA512 TLSH

          Bgs4QmuzpNkE3eFhZ7BSNDwJfhFcfUXAGAWI61Y9XalSRMbtbge.bat

          • Path C:\Users\Admin\AppData\Local\Temp\ComcontainerSession\Bgs4QmuzpNkE3eFhZ7BSNDwJfhFcfUXAGAWI61Y9XalSRMbtbge.bat
          • Size 100B
          • SHA256 91461264aeeb1696f5b3b71037816bc44c727e4d9adf41dc7afb036723c42afd
          • MD5 SHA1 SHA512 TLSH

          QXOxC7m7bDPPkgkvCappPoYma6Hu9G9i3un0C9o5Lri5Xn.vbe

          • Path C:\Users\Admin\AppData\Local\Temp\ComcontainerSession\QXOxC7m7bDPPkgkvCappPoYma6Hu9G9i3un0C9o5Lri5Xn.vbe
          • Size 249B
          • SHA256 41eeea84d2377000f2e61344c28b871b81f5a1a6b74bba0914904fd30bf19fa5
          • MD5 SHA1 SHA512 TLSH

          bridgeagentWebRef.exe

          • Path C:\Users\Admin\AppData\Local\Temp\ComcontainerSession\bridgeagentWebRef.exe
          • Size 2.4MB
          • SHA256 9e3a4d73345f068d9a6142ca75b6d0ad17b68aa3187fd57fcc55157308adc554
          • MD5 SHA1 SHA512 SSDEEP TLSH

          __PSScriptPolicyTest_m2nz0qjp.dyw.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_m2nz0qjp.dyw.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512 TLSH

          zB9IPyyWT1.bat

          • Path C:\Users\Admin\AppData\Local\Temp\zB9IPyyWT1.bat
          • Size 160B
          • SHA256 8147bfe0a1215eb4144d1df939c9f585014a7f7fe1e42ab48b2750bcc44d4f93
          • MD5 SHA1 SHA512 TLSH

          memory/396-96-0x00000225E7DF0000-0x00000225E7EE0000-memory.dmp

          memory/3380-93-0x0000017944E10000-0x0000017944F00000-memory.dmp

          memory/3540-102-0x0000024AF8B90000-0x0000024AF8C80000-memory.dmp

          memory/3736-92-0x000001ADC0800000-0x000001ADC08F0000-memory.dmp

          memory/5392-87-0x00000191EDE20000-0x00000191EDF10000-memory.dmp

          memory/5392-81-0x00000191ED6F0000-0x00000191ED6FA000-memory.dmp

          memory/5392-74-0x00000191ED820000-0x00000191ED8D2000-memory.dmp

          memory/5392-73-0x00000191ED6D0000-0x00000191ED6EE000-memory.dmp

          memory/5592-104-0x000000001B7F0000-0x000000001B898000-memory.dmp

          memory/5592-105-0x000000001B9A0000-0x000000001BA90000-memory.dmp

          memory/5592-106-0x000000001E9B0000-0x000000001EA24000-memory.dmp

          memory/5620-23-0x000000001B060000-0x000000001B072000-memory.dmp

          memory/5620-62-0x000000001B860000-0x000000001B908000-memory.dmp

          memory/5620-32-0x000000001B460000-0x000000001B4BA000-memory.dmp

          memory/5620-33-0x000000001B0C0000-0x000000001B0CE000-memory.dmp

          memory/5620-34-0x000000001B400000-0x000000001B410000-memory.dmp

          memory/5620-35-0x000000001B410000-0x000000001B41E000-memory.dmp

          memory/5620-36-0x000000001B420000-0x000000001B428000-memory.dmp

          memory/5620-37-0x000000001B4C0000-0x000000001B4D8000-memory.dmp

          memory/5620-38-0x000000001B430000-0x000000001B43C000-memory.dmp

          memory/5620-39-0x000000001B530000-0x000000001B57E000-memory.dmp

          memory/5620-47-0x000000001B860000-0x000000001B908000-memory.dmp

          memory/5620-48-0x000000001BE60000-0x000000001BED4000-memory.dmp

          memory/5620-30-0x000000001B080000-0x000000001B090000-memory.dmp

          memory/5620-14-0x0000000000070000-0x00000000002DC000-memory.dmp

          memory/5620-29-0x000000001B050000-0x000000001B05C000-memory.dmp

          memory/5620-31-0x000000001B090000-0x000000001B0A0000-memory.dmp

          memory/5620-63-0x000000001BE60000-0x000000001BED4000-memory.dmp

          memory/5620-28-0x000000001B930000-0x000000001BE58000-memory.dmp

          memory/5620-27-0x000000001B3E0000-0x000000001B3F2000-memory.dmp

          memory/5620-26-0x000000001B0A0000-0x000000001B0B6000-memory.dmp

          memory/5620-25-0x000000001B040000-0x000000001B050000-memory.dmp

          memory/5620-24-0x000000001ADD0000-0x000000001ADDC000-memory.dmp

          memory/5620-22-0x0000000002360000-0x000000000236E000-memory.dmp

          memory/5620-21-0x0000000002320000-0x0000000002330000-memory.dmp

          memory/5620-20-0x0000000002310000-0x0000000002320000-memory.dmp

          memory/5620-19-0x0000000002300000-0x0000000002310000-memory.dmp

          memory/5620-18-0x000000001ADE0000-0x000000001AE30000-memory.dmp

          memory/5620-15-0x0000000002330000-0x0000000002356000-memory.dmp

          memory/5620-17-0x000000001AD70000-0x000000001AD8C000-memory.dmp

          memory/5620-16-0x0000000000CD0000-0x0000000000CDE000-memory.dmp

          memory/5712-101-0x000001BEFF7A0000-0x000001BEFF890000-memory.dmp

          memory/5712-59-0x000001BEE7140000-0x000001BEE7162000-memory.dmp