Analysis

  • max time kernel
    141s
  • max time network
    103s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/06/2024, 01:00

General

  • Target
    025ecb4bd7e95666a15b84ef10a548106f3495914a626da84fa491779fb9056e.exe
  • Size 2.3MB
  • Sample240625-bc5dwaverj
  • SHA256 025ecb4bd7e95666a15b84ef10a548106f3495914a626da84fa491779fb9056e
  • 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 13 IoCs
  • Process spawned unexpected child process 39 IoCs

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

  • DCRat payload 2 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 26 IoCs
  • Drops file in Program Files directory 11 IoCs
  • Drops file in Windows directory 5 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 39 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 28 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\025ecb4bd7e95666a15b84ef10a548106f3495914a626da84fa491779fb9056e.exe
    "C:\Users\Admin\AppData\Local\Temp\025ecb4bd7e95666a15b84ef10a548106f3495914a626da84fa491779fb9056e.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • 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:1008
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\QiV0Z2llid.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5044
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:2088
        • C:\Windows\uk-UA\System.exe
          "C:\Windows\uk-UA\System.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:644
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\unsecapp.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2140
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Users\Default User\unsecapp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1360
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\unsecapp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1380
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 6 /tr "'C:\Windows\RemotePackages\RemoteDesktops\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1908
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\RemotePackages\RemoteDesktops\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2964
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 9 /tr "'C:\Windows\RemotePackages\RemoteDesktops\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4648
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3064
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:372
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4652
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\Windows\uk-UA\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1944
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Windows\uk-UA\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2284
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 7 /tr "'C:\Windows\uk-UA\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3452
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 14 /tr "'C:\Program Files\Mozilla Firefox\sppsvc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:972
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files\Mozilla Firefox\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3048
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Program Files\Mozilla Firefox\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3440
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Media Player\spoolsv.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3524
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Media Player\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4060
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Media Player\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2400
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Reference Assemblies\Registry.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1212
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2620
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Reference Assemblies\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2940
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\sysmon.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5052
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\sysmon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3780
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\sysmon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:456
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Media Player\es-ES\fontdrvhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4516
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files\Windows Media Player\es-ES\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4616
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Media Player\es-ES\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3648
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\Start Menu\TextInputHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4564
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Users\Admin\Start Menu\TextInputHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5072
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\Start Menu\TextInputHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3616
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\Start Menu\smss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3992
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Users\Admin\Start Menu\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4120
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\Start Menu\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3884
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4672
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4720
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\lsass.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 "fontdrvhostf" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\fontdrvhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1760
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3632
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2812

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          sppsvc.exe

          • Path C:\Program Files\Mozilla Firefox\sppsvc.exe
          • Size 2.3MB
          • SHA256 025ecb4bd7e95666a15b84ef10a548106f3495914a626da84fa491779fb9056e
          • MD5 SHA1 SHA512 SSDEEP

          QiV0Z2llid.bat

          • Path C:\Users\Admin\AppData\Local\Temp\QiV0Z2llid.bat
          • Size 192B
          • SHA256 49415a753df5b5375d5262685b0b87fec3d434bf7c4e1835465cf9b34940909c
          • MD5 SHA1 SHA512

          memory/644-49-0x0000000000AC0000-0x0000000000AD2000-memory.dmp

          memory/1008-4-0x000000001B6C0000-0x000000001B710000-memory.dmp

          memory/1008-0-0x00007FFE70A13000-0x00007FFE70A15000-memory.dmp

          memory/1008-5-0x000000001B670000-0x000000001B686000-memory.dmp

          memory/1008-6-0x000000001B860000-0x000000001B8B6000-memory.dmp

          memory/1008-7-0x000000001B690000-0x000000001B6A2000-memory.dmp

          memory/1008-8-0x000000001C740000-0x000000001CC68000-memory.dmp

          memory/1008-9-0x000000001B710000-0x000000001B71E000-memory.dmp

          memory/1008-11-0x000000001B730000-0x000000001B738000-memory.dmp

          memory/1008-10-0x000000001B720000-0x000000001B728000-memory.dmp

          memory/1008-3-0x0000000002CD0000-0x0000000002CEC000-memory.dmp

          memory/1008-44-0x00007FFE70A10000-0x00007FFE714D1000-memory.dmp

          memory/1008-2-0x00007FFE70A10000-0x00007FFE714D1000-memory.dmp

          memory/1008-1-0x0000000000900000-0x0000000000B52000-memory.dmp