Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/06/2024, 11:31

General

  • Target
    587e1d2473fea9284918bfbcf9897de2.exe
  • Size 2.5MB
  • Sample240630-nmpsdsxbla
  • SHA256 c729d915ac96ff25722e76303e87e67c8ed51f776992724fa89fedbb77fc8a28
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • DcRat

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

  • Modifies WinLogon for persistence 2 TTPs 9 IoCs
  • Process spawned unexpected child process 27 IoCs

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

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 2 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 10 IoCs

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

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 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 18 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Program Files directory 7 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 27 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 52 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 15 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs
  • System policy modification 1 TTPs 6 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.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\587e1d2473fea9284918bfbcf9897de2.exe
    "C:\Users\Admin\AppData\Local\Temp\587e1d2473fea9284918bfbcf9897de2.exe"
    1⤵
    • Modifies WinLogon for persistence
    • UAC bypass
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2292
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\587e1d2473fea9284918bfbcf9897de2.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3016
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\1.3.187.37\fontdrvhost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4272
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Default\Saved Games\explorer.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:544
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Vss\Writers\Application\wininit.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4976
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\System.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4676
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\All Users\Templates\dwm.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3660
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Common Files\Oracle\Java\javapath_target_105437\msedge.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2368
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Containers\dllhost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4428
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\WindowsPowerShell\upfc.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1088
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\wininit.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4744
    • C:\Recovery\WindowsRE\System.exe
      "C:\Recovery\WindowsRE\System.exe"
      2⤵
      • UAC bypass
      • Checks computer location settings
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:3408
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\8bf6052c-9d4c-4fd7-bfab-3883395258a2.vbs"
        3⤵
          PID:4300
        • C:\Windows\System32\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\961504e2-f782-440a-b4ae-85357f81ecac.vbs"
          3⤵
            PID:824
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\1.3.187.37\fontdrvhost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4628
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\1.3.187.37\fontdrvhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4704
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\1.3.187.37\fontdrvhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2528
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "explorere" /sc MINUTE /mo 5 /tr "'C:\Users\Default\Saved Games\explorer.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3828
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Users\Default\Saved Games\explorer.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3444
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "explorere" /sc MINUTE /mo 12 /tr "'C:\Users\Default\Saved Games\explorer.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2180
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 10 /tr "'C:\Windows\Vss\Writers\Application\wininit.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1184
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\Vss\Writers\Application\wininit.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4820
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\Windows\Vss\Writers\Application\wininit.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4300
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\System.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:448
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\System.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4448
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\System.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3688
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 11 /tr "'C:\Users\All Users\Templates\dwm.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1000
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Users\All Users\Templates\dwm.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2388
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 9 /tr "'C:\Users\All Users\Templates\dwm.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2860
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "msedgem" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Common Files\Oracle\Java\javapath_target_105437\msedge.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:540
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "msedge" /sc ONLOGON /tr "'C:\Program Files (x86)\Common Files\Oracle\Java\javapath_target_105437\msedge.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4580
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "msedgem" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Common Files\Oracle\Java\javapath_target_105437\msedge.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4088
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 10 /tr "'C:\Windows\Containers\dllhost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2056
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\Containers\dllhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4028
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Windows\Containers\dllhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:984
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 7 /tr "'C:\Program Files\WindowsPowerShell\upfc.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:844
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Program Files\WindowsPowerShell\upfc.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1312
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 14 /tr "'C:\Program Files\WindowsPowerShell\upfc.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2424
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3076
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3644
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:880
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=1288,i,11746347647270949551,7786733067759450703,262144 --variations-seed-version --mojo-platform-channel-handle=4028 /prefetch:8
        1⤵
          PID:4536
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3108

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              dwm.exe

              • Path C:\ProgramData\Microsoft\Windows\Templates\dwm.exe
              • Size 2.5MB
              • SHA256 c729d915ac96ff25722e76303e87e67c8ed51f776992724fa89fedbb77fc8a28
              • MD5 SHA1 SHA512 SSDEEP

              powershell.exe.log

              • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
              • Size 2KB
              • SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
              • MD5 SHA1 SHA512

              StartupProfileData-NonInteractive

              • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
              • Size 944B
              • SHA256 cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438
              • MD5 SHA1 SHA512

              StartupProfileData-NonInteractive

              • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
              • Size 944B
              • SHA256 8222fe869b025493591ca2ffbabe089c2e682449e77b754fc864ba62d64ee957
              • MD5 SHA1 SHA512

              StartupProfileData-NonInteractive

              • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
              • Size 944B
              • SHA256 986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05
              • MD5 SHA1 SHA512

              StartupProfileData-NonInteractive

              • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
              • Size 944B
              • SHA256 8c66720f953e82cfbd8f00543c42c0cf77c3d97787ec09cb3e1e2ba5819bd638
              • MD5 SHA1 SHA512

              8bf6052c-9d4c-4fd7-bfab-3883395258a2.vbs

              • Path C:\Users\Admin\AppData\Local\Temp\8bf6052c-9d4c-4fd7-bfab-3883395258a2.vbs
              • Size 708B
              • SHA256 a6321181ae787a674800b97cfea69a4338720e5ea03b4965bf91b22ddfcfbb32
              • MD5 SHA1 SHA512

              961504e2-f782-440a-b4ae-85357f81ecac.vbs

              • Path C:\Users\Admin\AppData\Local\Temp\961504e2-f782-440a-b4ae-85357f81ecac.vbs
              • Size 484B
              • SHA256 77a9232dbefd9051ecd41b72c8c39a08a0c7959d11048b4440b65291e6381d90
              • MD5 SHA1 SHA512

              __PSScriptPolicyTest_1alpzu2w.in0.ps1

              • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1alpzu2w.in0.ps1
              • Size 60B
              • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
              • MD5 SHA1 SHA512

              memory/1088-53-0x000001C85CF40000-0x000001C85CF62000-memory.dmp

              memory/2292-11-0x000000001B2F0000-0x000000001B2F8000-memory.dmp

              memory/2292-10-0x000000001B2E0000-0x000000001B2EC000-memory.dmp

              memory/2292-16-0x000000001B9E0000-0x000000001B9EE000-memory.dmp

              memory/2292-15-0x000000001B9D0000-0x000000001B9DA000-memory.dmp

              memory/2292-13-0x000000001B310000-0x000000001B318000-memory.dmp

              memory/2292-12-0x000000001B300000-0x000000001B30C000-memory.dmp

              memory/2292-0-0x00007FF992653000-0x00007FF992655000-memory.dmp

              memory/2292-18-0x000000001BA00000-0x000000001BA08000-memory.dmp

              memory/2292-50-0x00007FF992650000-0x00007FF993111000-memory.dmp

              memory/2292-19-0x000000001BA20000-0x000000001BA2A000-memory.dmp

              memory/2292-20-0x000000001BA30000-0x000000001BA3C000-memory.dmp

              memory/2292-17-0x000000001B9F0000-0x000000001B9F8000-memory.dmp

              memory/2292-6-0x0000000002700000-0x0000000002708000-memory.dmp

              memory/2292-5-0x000000001B270000-0x000000001B2C0000-memory.dmp

              memory/2292-4-0x00000000026E0000-0x00000000026FC000-memory.dmp

              memory/2292-14-0x000000001B9C0000-0x000000001B9C8000-memory.dmp

              memory/2292-7-0x000000001B2C0000-0x000000001B2D6000-memory.dmp

              memory/2292-9-0x000000001B970000-0x000000001B9C6000-memory.dmp

              memory/2292-8-0x0000000002780000-0x000000000278A000-memory.dmp

              memory/2292-3-0x00000000026D0000-0x00000000026DE000-memory.dmp

              memory/2292-2-0x00007FF992650000-0x00007FF993111000-memory.dmp

              memory/2292-1-0x0000000000320000-0x00000000005B0000-memory.dmp