Analysis

  • max time kernel
    93s
  • max time network
    94s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250129-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-02-2025 07:49

General

  • Target

    0fa17a49135e93d8a45c9eca2033e45c3afcc748d452047daa90cfae57a30740N.exe

  • Size

    2.5MB

  • MD5

    7e12764a3dcdb61235625a662d5fb300

  • SHA1

    0e3047af2c786c489a49a9728ace7e5058f3e2f7

  • SHA256

    0fa17a49135e93d8a45c9eca2033e45c3afcc748d452047daa90cfae57a30740

  • SHA512

    f6be4e8e5028947c784a65e58dc1f124378b85869e153922849e7c0421ca6b140c496f83b14fd99ad85a793527d3d1a7170630f803a6d6c2baabe5e7fcef755b

  • SSDEEP

    49152:cTZXGGaXwpWG3wn8OTvgOP2Z4Ya+pHUvTzYUNBrQYn102K:AZXGGaXjGgJGHa+teTfQY10

Malware Config

Signatures

  • DcRat

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

  • Dcrat family
  • Process spawned unexpected child process 18 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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 2 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 18 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 6 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\0fa17a49135e93d8a45c9eca2033e45c3afcc748d452047daa90cfae57a30740N.exe
    "C:\Users\Admin\AppData\Local\Temp\0fa17a49135e93d8a45c9eca2033e45c3afcc748d452047daa90cfae57a30740N.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Checks whether UAC is enabled
    • 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
    • System policy modification
    PID:1644
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\XxYo7XUB0L.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4552
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:372
        • C:\Program Files\MSBuild\sppsvc.exe
          "C:\Program Files\MSBuild\sppsvc.exe"
          3⤵
          • UAC bypass
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • System policy modification
          PID:4248
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\OneDrive\wininit.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:692
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Users\Admin\OneDrive\wininit.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 "wininitw" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\OneDrive\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3844
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\fontdrvhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3860
    • 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:2956
    • 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:1432
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 5 /tr "'C:\Windows\de-DE\backgroundTaskHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1888
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\de-DE\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3856
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 7 /tr "'C:\Windows\de-DE\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2008
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\backgroundTaskHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1556
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2824
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4508
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 13 /tr "'C:\Program Files\MSBuild\sppsvc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3880
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files\MSBuild\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4920
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Program Files\MSBuild\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4456
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Defender\uk-UA\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4208
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\uk-UA\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3120
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Defender\uk-UA\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2220

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Program Files\MSBuild\sppsvc.exe

      Filesize

      2.5MB

      MD5

      7e12764a3dcdb61235625a662d5fb300

      SHA1

      0e3047af2c786c489a49a9728ace7e5058f3e2f7

      SHA256

      0fa17a49135e93d8a45c9eca2033e45c3afcc748d452047daa90cfae57a30740

      SHA512

      f6be4e8e5028947c784a65e58dc1f124378b85869e153922849e7c0421ca6b140c496f83b14fd99ad85a793527d3d1a7170630f803a6d6c2baabe5e7fcef755b

    • C:\Users\Admin\AppData\Local\Temp\XxYo7XUB0L.bat

      Filesize

      200B

      MD5

      f7bc1a11b77af0dcbbe720bf9541ae15

      SHA1

      0dcc84a19c71d5dbe1048d12e0f5c17a99ec080e

      SHA256

      88716dbe60d0909396d552d652eed681c01f267fdbf77cafe0e5343ee9e80baf

      SHA512

      cefe760e5e27ffdd32d123dceae2524f9d61079bc32cba7bb2d365ba0cd23525442448712beae277ae3debc3bb1cdd0674ab5b2afb589f6399c5bd0eb3550d0c

    • memory/1644-10-0x000000001B7F0000-0x000000001B846000-memory.dmp

      Filesize

      344KB

    • memory/1644-13-0x000000001C050000-0x000000001C578000-memory.dmp

      Filesize

      5.2MB

    • memory/1644-4-0x000000001B070000-0x000000001B08C000-memory.dmp

      Filesize

      112KB

    • memory/1644-5-0x000000001B660000-0x000000001B6B0000-memory.dmp

      Filesize

      320KB

    • memory/1644-6-0x0000000002680000-0x0000000002688000-memory.dmp

      Filesize

      32KB

    • memory/1644-8-0x000000001B130000-0x000000001B138000-memory.dmp

      Filesize

      32KB

    • memory/1644-7-0x000000001B110000-0x000000001B126000-memory.dmp

      Filesize

      88KB

    • memory/1644-9-0x000000001B140000-0x000000001B14A000-memory.dmp

      Filesize

      40KB

    • memory/1644-0-0x00007FFB56073000-0x00007FFB56075000-memory.dmp

      Filesize

      8KB

    • memory/1644-11-0x000000001B840000-0x000000001B848000-memory.dmp

      Filesize

      32KB

    • memory/1644-12-0x000000001B850000-0x000000001B862000-memory.dmp

      Filesize

      72KB

    • memory/1644-3-0x0000000002670000-0x000000000267E000-memory.dmp

      Filesize

      56KB

    • memory/1644-16-0x000000001B9A0000-0x000000001B9AC000-memory.dmp

      Filesize

      48KB

    • memory/1644-14-0x000000001B880000-0x000000001B888000-memory.dmp

      Filesize

      32KB

    • memory/1644-17-0x000000001B8A0000-0x000000001B8AE000-memory.dmp

      Filesize

      56KB

    • memory/1644-19-0x000000001B8C0000-0x000000001B8CC000-memory.dmp

      Filesize

      48KB

    • memory/1644-18-0x000000001B8B0000-0x000000001B8BA000-memory.dmp

      Filesize

      40KB

    • memory/1644-15-0x000000001B890000-0x000000001B898000-memory.dmp

      Filesize

      32KB

    • memory/1644-2-0x00007FFB56070000-0x00007FFB56B31000-memory.dmp

      Filesize

      10.8MB

    • memory/1644-37-0x00007FFB56070000-0x00007FFB56B31000-memory.dmp

      Filesize

      10.8MB

    • memory/1644-1-0x00000000001E0000-0x0000000000470000-memory.dmp

      Filesize

      2.6MB