Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    17-07-2024 02:56

General

  • Target

    cdb363f810ebeea6e40abc725c14e9bf78a3014559ec3.exe

  • Size

    3.3MB

  • MD5

    af4cd8f5b99d7e371a6ddd880aec1079

  • SHA1

    caba9083a0128266b477330c2e5d8874646a915d

  • SHA256

    cdb363f810ebeea6e40abc725c14e9bf78a3014559ec32903c15fd7576fcac20

  • SHA512

    c0fbb42b516c4a83a3dbeab47199fb603330929788008a314c222ec1585845a40538cd2f2b18ace200436beeed2b7428fe23fd9e19bb2f5a3f48939ab93432ff

  • SSDEEP

    98304:PbD91o0GWLMJo5sZB8MDJ2RZeeD+Gvl/ndA:PXbnGWLMTZyjnCg/i

Malware Config

Signatures

  • DcRat 20 IoCs

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

  • Modifies WinLogon for persistence 2 TTPs 6 IoCs
  • Process spawned unexpected child process 18 IoCs

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

  • DCRat payload 3 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 7 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 12 IoCs
  • Drops file in Program Files directory 7 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 9 IoCs
  • Suspicious use of WriteProcessMemory 40 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\cdb363f810ebeea6e40abc725c14e9bf78a3014559ec3.exe
    "C:\Users\Admin\AppData\Local\Temp\cdb363f810ebeea6e40abc725c14e9bf78a3014559ec3.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3004
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Surrogatewebref\0OThNUtq.vbe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2564
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Surrogatewebref\W7CNC.bat" "
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:2748
        • C:\Surrogatewebref\reviewcommon.exe
          "C:\Surrogatewebref\reviewcommon.exe"
          4⤵
          • DcRat
          • Modifies WinLogon for persistence
          • Executes dropped EXE
          • Adds Run key to start application
          • Drops file in Program Files directory
          • Drops file in Windows directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2872
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Surrogatewebref\reviewcommon.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2168
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\explorer.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1984
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Public\Desktop\services.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2184
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\assembly\GAC_32\System.Printing\3.0.0.0__31bf3856ad364e35\wininit.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2088
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Java\jdk1.7.0_80\db\reviewcommon.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2340
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\All Users\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\dllhost.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2300
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Microsoft Office\MEDIA\CAGCAT10\1033\Idle.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2908
          • C:\Windows\assembly\GAC_32\System.Printing\3.0.0.0__31bf3856ad364e35\wininit.exe
            "C:\Windows\assembly\GAC_32\System.Printing\3.0.0.0__31bf3856ad364e35\wininit.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2248
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Surrogatewebref\file.vbs"
      2⤵
        PID:2668
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorere" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\explorer.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2972
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\explorer.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2812
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorere" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\explorer.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1460
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\Users\Public\Desktop\services.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2804
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Public\Desktop\services.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2876
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 7 /tr "'C:\Users\Public\Desktop\services.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1288
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 11 /tr "'C:\Windows\assembly\GAC_32\System.Printing\3.0.0.0__31bf3856ad364e35\wininit.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2864
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\assembly\GAC_32\System.Printing\3.0.0.0__31bf3856ad364e35\wininit.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2712
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 14 /tr "'C:\Windows\assembly\GAC_32\System.Printing\3.0.0.0__31bf3856ad364e35\wininit.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2768
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "reviewcommonr" /sc MINUTE /mo 6 /tr "'C:\Program Files\Java\jdk1.7.0_80\db\reviewcommon.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2392
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "reviewcommon" /sc ONLOGON /tr "'C:\Program Files\Java\jdk1.7.0_80\db\reviewcommon.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1132
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "reviewcommonr" /sc MINUTE /mo 6 /tr "'C:\Program Files\Java\jdk1.7.0_80\db\reviewcommon.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:856
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Users\All Users\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\dllhost.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1780
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\All Users\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2000
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Users\All Users\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1672
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Microsoft Office\MEDIA\CAGCAT10\1033\Idle.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2080
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Office\MEDIA\CAGCAT10\1033\Idle.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:664
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Microsoft Office\MEDIA\CAGCAT10\1033\Idle.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2072

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Surrogatewebref\0OThNUtq.vbe

      Filesize

      197B

      MD5

      013e4068fecbf70a6305a10f4baac7d0

      SHA1

      113ac6511cb6965dc872d284552ea129e1e41973

      SHA256

      f087215bae0916b3575743a62c0d6722e6e78623f8046a53f8914661b3c6a10e

      SHA512

      f50fb4b24aa8846c94fba07e07b0f5e71b7c67b9843c34951eb4b4fbb7de8309d1441c16359621402659b3c4a406dccc93ea79056030f63adf8a359934cd3940

    • C:\Surrogatewebref\W7CNC.bat

      Filesize

      37B

      MD5

      b0d15fb085639d7d63a9556af4bdfced

      SHA1

      8a5498b0d47fbeae2c9452ceb8f413f4b1d3ac0b

      SHA256

      2e7b9e10897a9224a935716fbefe4c362d8a09ef9176a8ed794741e7418521b5

      SHA512

      d88ab6f23c8e08dd82443239451b84de849a967d08d20b84894e8cf134ad2789c2e9c9e92d6d1c3da0b9e3e0bcecd4a86d5b24fe167f4f6f8a3a5ad8f5b0e146

    • C:\Surrogatewebref\file.vbs

      Filesize

      34B

      MD5

      677cc4360477c72cb0ce00406a949c61

      SHA1

      b679e8c3427f6c5fc47c8ac46cd0e56c9424de05

      SHA256

      f1cccb5ae4aa51d293bd3c7d2a1a04cb7847d22c5db8e05ac64e9a6d7455aa0b

      SHA512

      7cfe2cc92f9e659f0a15a295624d611b3363bd01eb5bcf9bc7681ea9b70b0564d192d570d294657c8dc2c93497fa3b4526c975a9bf35d69617c31d9936573c6a

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

      Filesize

      7KB

      MD5

      e641cc6515ffcfb1560c3218c3b25420

      SHA1

      3eef975f89027a39c22405de798e564030285b64

      SHA256

      922e7c881b6296f547274e86663027abba2a750a82b5f6ad001cb71f427e8497

      SHA512

      5605a329f946b3f8f83301ab44c591ec1716b550a7e86dcd9f9dd01258b4ff2e13f51e20b0f415de5023693c5bc6c071dccd51e5f27de5fb007c0f48505290e1

    • \Surrogatewebref\reviewcommon.exe

      Filesize

      3.0MB

      MD5

      2691a48220ece165313a2096d4be7788

      SHA1

      bb9d65345c7aae09cd340e8b2eae8e3a8ff45f96

      SHA256

      20a6875053a9b02e3dca4c650b698f5eb0f22119b6d51317043c5953aab00a55

      SHA512

      13c70c3a44aa67a29e066d6c7e283574d165fa2a1e6bfc4be992ff6fcfc9c1a126b97fd64f18dfbe4e5d27eae75e8b6e6325f3ae96871afb2aef006e6589023f

    • memory/2248-95-0x00000000021D0000-0x0000000002226000-memory.dmp

      Filesize

      344KB

    • memory/2248-94-0x00000000003C0000-0x00000000003D2000-memory.dmp

      Filesize

      72KB

    • memory/2248-57-0x00000000003D0000-0x00000000006DA000-memory.dmp

      Filesize

      3.0MB

    • memory/2300-87-0x000000001B700000-0x000000001B9E2000-memory.dmp

      Filesize

      2.9MB

    • memory/2300-93-0x0000000001F40000-0x0000000001F48000-memory.dmp

      Filesize

      32KB

    • memory/2872-28-0x0000000002290000-0x00000000022E6000-memory.dmp

      Filesize

      344KB

    • memory/2872-35-0x000000001AF20000-0x000000001AF2C000-memory.dmp

      Filesize

      48KB

    • memory/2872-26-0x0000000000A50000-0x0000000000A60000-memory.dmp

      Filesize

      64KB

    • memory/2872-27-0x0000000002280000-0x000000000228C000-memory.dmp

      Filesize

      48KB

    • memory/2872-24-0x0000000000A40000-0x0000000000A52000-memory.dmp

      Filesize

      72KB

    • memory/2872-29-0x0000000002360000-0x000000000236C000-memory.dmp

      Filesize

      48KB

    • memory/2872-30-0x000000001A900000-0x000000001A90C000-memory.dmp

      Filesize

      48KB

    • memory/2872-31-0x000000001A910000-0x000000001A918000-memory.dmp

      Filesize

      32KB

    • memory/2872-32-0x000000001A920000-0x000000001A932000-memory.dmp

      Filesize

      72KB

    • memory/2872-33-0x000000001A930000-0x000000001A93C000-memory.dmp

      Filesize

      48KB

    • memory/2872-34-0x000000001AA40000-0x000000001AA48000-memory.dmp

      Filesize

      32KB

    • memory/2872-25-0x0000000002270000-0x000000000227C000-memory.dmp

      Filesize

      48KB

    • memory/2872-36-0x000000001AF30000-0x000000001AF3E000-memory.dmp

      Filesize

      56KB

    • memory/2872-37-0x000000001AFC0000-0x000000001AFCE000-memory.dmp

      Filesize

      56KB

    • memory/2872-38-0x000000001AFD0000-0x000000001AFD8000-memory.dmp

      Filesize

      32KB

    • memory/2872-23-0x0000000000A20000-0x0000000000A36000-memory.dmp

      Filesize

      88KB

    • memory/2872-22-0x0000000000640000-0x000000000065C000-memory.dmp

      Filesize

      112KB

    • memory/2872-21-0x0000000000630000-0x0000000000638000-memory.dmp

      Filesize

      32KB

    • memory/2872-20-0x00000000004A0000-0x00000000004AE000-memory.dmp

      Filesize

      56KB

    • memory/2872-19-0x00000000001D0000-0x00000000001DE000-memory.dmp

      Filesize

      56KB

    • memory/2872-18-0x0000000000A60000-0x0000000000D6A000-memory.dmp

      Filesize

      3.0MB