Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-06-2023 12:11

General

  • Target

    9E58D61752C75CE86ABC03005F0C75D9E2CF8218A5245.exe

  • Size

    1.1MB

  • MD5

    ba182fd81a486ddb460723be522ce562

  • SHA1

    5dc2ad0fa9c62f91ecae3322d433640694248023

  • SHA256

    9e58d61752c75ce86abc03005f0c75d9e2cf8218a5245d84ccc9abd9fe7a265d

  • SHA512

    077c9beda4f04f5c472f5699ceaee7f3bd0ffed3272c24ce2ace2a926d003f5a2a7e75f7ecc5c1b98ccd8be0c486de97e98cb80965d5b94b46cdd453378df398

  • SSDEEP

    24576:G4VHpBN/oi3FLVAdz3+H1jGt/OzwiI6bHeWsgFFNhtA:G4BpwiVRVjGJfuKWsgFLht

Score
10/10

Malware Config

Signatures

  • DcRat

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

  • Process spawned unexpected child process 27 IoCs

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

  • DCRat payload 4 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
  • Drops file in Program Files directory 10 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 27 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 25 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 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\9E58D61752C75CE86ABC03005F0C75D9E2CF8218A5245.exe
    "C:\Users\Admin\AppData\Local\Temp\9E58D61752C75CE86ABC03005F0C75D9E2CF8218A5245.exe"
    1⤵
    • Checks computer location settings
    • 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:4376
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\TJXDSSRtH9.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:852
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:4724
        • C:\Program Files (x86)\Windows Sidebar\fontdrvhost.exe
          "C:\Program Files (x86)\Windows Sidebar\fontdrvhost.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          PID:2204
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\odt\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3952
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\odt\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4276
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\odt\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2352
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Portable Devices\StartMenuExperienceHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2024
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\StartMenuExperienceHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3000
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Portable Devices\StartMenuExperienceHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3916
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\smss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1172
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1724
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1824
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 7 /tr "'C:\Windows\ShellExperiences\sysmon.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:844
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\ShellExperiences\sysmon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:316
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 6 /tr "'C:\Windows\ShellExperiences\sysmon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2540
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:216
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Multimedia Platform\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:64
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3412
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Users\All Users\Start Menu\wininit.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4576
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Users\All Users\Start Menu\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4964
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 5 /tr "'C:\Users\All Users\Start Menu\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4704
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Sidebar\fontdrvhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3844
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3376
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Sidebar\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3448
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Portable Devices\wininit.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1608
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3784
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Portable Devices\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1132
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Media Player\en-US\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2912
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Media Player\en-US\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4248
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Media Player\en-US\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3764

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Discovery

    Query Registry

    2
    T1012

    System Information Discovery

    2
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Program Files (x86)\Windows Multimedia Platform\RuntimeBroker.exe
      Filesize

      1.1MB

      MD5

      ba182fd81a486ddb460723be522ce562

      SHA1

      5dc2ad0fa9c62f91ecae3322d433640694248023

      SHA256

      9e58d61752c75ce86abc03005f0c75d9e2cf8218a5245d84ccc9abd9fe7a265d

      SHA512

      077c9beda4f04f5c472f5699ceaee7f3bd0ffed3272c24ce2ace2a926d003f5a2a7e75f7ecc5c1b98ccd8be0c486de97e98cb80965d5b94b46cdd453378df398

    • C:\Program Files (x86)\Windows Sidebar\fontdrvhost.exe
      Filesize

      1.1MB

      MD5

      ba182fd81a486ddb460723be522ce562

      SHA1

      5dc2ad0fa9c62f91ecae3322d433640694248023

      SHA256

      9e58d61752c75ce86abc03005f0c75d9e2cf8218a5245d84ccc9abd9fe7a265d

      SHA512

      077c9beda4f04f5c472f5699ceaee7f3bd0ffed3272c24ce2ace2a926d003f5a2a7e75f7ecc5c1b98ccd8be0c486de97e98cb80965d5b94b46cdd453378df398

    • C:\Program Files (x86)\Windows Sidebar\fontdrvhost.exe
      Filesize

      1.1MB

      MD5

      ba182fd81a486ddb460723be522ce562

      SHA1

      5dc2ad0fa9c62f91ecae3322d433640694248023

      SHA256

      9e58d61752c75ce86abc03005f0c75d9e2cf8218a5245d84ccc9abd9fe7a265d

      SHA512

      077c9beda4f04f5c472f5699ceaee7f3bd0ffed3272c24ce2ace2a926d003f5a2a7e75f7ecc5c1b98ccd8be0c486de97e98cb80965d5b94b46cdd453378df398

    • C:\Users\Admin\AppData\Local\Temp\TJXDSSRtH9.bat
      Filesize

      219B

      MD5

      67d3588c356b68346e8a55120176d3e8

      SHA1

      759cfcc3374271879f302dbf7cfcc818c63c47fa

      SHA256

      e67f52e8d352c424ab081030e866cdaae45e3ba93c3caf1067a2cb1e87bf0af8

      SHA512

      f973cb2c5844b19aa9ae9335f6b540154bc923cfd78da07fc5a55be86f2ee2de628fc43469327e348cc767edc17c7f5e6f8c84239f164a05da00fd88e708b372

    • memory/2204-163-0x000000001B0D0000-0x000000001B0E0000-memory.dmp
      Filesize

      64KB

    • memory/2204-164-0x000000001B0D0000-0x000000001B0E0000-memory.dmp
      Filesize

      64KB

    • memory/4376-133-0x00000000003C0000-0x00000000004E6000-memory.dmp
      Filesize

      1.1MB

    • memory/4376-134-0x000000001B0B0000-0x000000001B0C0000-memory.dmp
      Filesize

      64KB

    • memory/4376-135-0x000000001B050000-0x000000001B0A0000-memory.dmp
      Filesize

      320KB