Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/05/2024, 08:51

General

  • Target
    ae869688bec81e7330c9b358632bb49f52c9f0c509f5bdaa68322716226eef8d.exe
  • Size 1.3MB
  • Sample240512-kr6pxsca47
  • SHA256 ae869688bec81e7330c9b358632bb49f52c9f0c509f5bdaa68322716226eef8d
  • MD5 SHA1 SHA512 SSDEEP
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 30 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
  • Drops file in Program Files directory 6 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 30 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 19 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\ae869688bec81e7330c9b358632bb49f52c9f0c509f5bdaa68322716226eef8d.exe
    "C:\Users\Admin\AppData\Local\Temp\ae869688bec81e7330c9b358632bb49f52c9f0c509f5bdaa68322716226eef8d.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:4304
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\Lz0qtTJHZp.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:220
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:1404
        • C:\Program Files (x86)\Google\CrashReports\dwm.exe
          "C:\Program Files (x86)\Google\CrashReports\dwm.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4828
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1268
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1388
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3552
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2200
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3284
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3224
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 14 /tr "'C:\Windows\CbsTemp\Idle.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3696
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Windows\CbsTemp\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1172
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 6 /tr "'C:\Windows\CbsTemp\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4040
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 5 /tr "'C:\Users\Public\Downloads\taskhostw.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1844
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Users\Public\Downloads\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3980
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 9 /tr "'C:\Users\Public\Downloads\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1072
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:856
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4496
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4820
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Windows\ServiceProfiles\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4780
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\ServiceProfiles\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1684
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Windows\ServiceProfiles\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3952
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Google\CrashReports\dwm.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1416
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\CrashReports\dwm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3228
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Google\CrashReports\dwm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4744
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Portable Devices\unsecapp.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4224
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\unsecapp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1528
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Portable Devices\unsecapp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1456
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "ae869688bec81e7330c9b358632bb49f52c9f0c509f5bdaa68322716226eef8da" /sc MINUTE /mo 14 /tr "'C:\Program Files\Internet Explorer\SIGNUP\ae869688bec81e7330c9b358632bb49f52c9f0c509f5bdaa68322716226eef8d.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4444
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "ae869688bec81e7330c9b358632bb49f52c9f0c509f5bdaa68322716226eef8d" /sc ONLOGON /tr "'C:\Program Files\Internet Explorer\SIGNUP\ae869688bec81e7330c9b358632bb49f52c9f0c509f5bdaa68322716226eef8d.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:976
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "ae869688bec81e7330c9b358632bb49f52c9f0c509f5bdaa68322716226eef8da" /sc MINUTE /mo 11 /tr "'C:\Program Files\Internet Explorer\SIGNUP\ae869688bec81e7330c9b358632bb49f52c9f0c509f5bdaa68322716226eef8d.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:564
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 11 /tr "'C:\Users\Public\spoolsv.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3252
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Users\Public\spoolsv.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 "spoolsvs" /sc MINUTE /mo 7 /tr "'C:\Users\Public\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3260

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          taskhostw.exe

          • Path C:\Recovery\WindowsRE\taskhostw.exe
          • Size 1.3MB
          • SHA256 ae869688bec81e7330c9b358632bb49f52c9f0c509f5bdaa68322716226eef8d
          • MD5 SHA1 SHA512 SSDEEP

          Lz0qtTJHZp.bat

          • Path C:\Users\Admin\AppData\Local\Temp\Lz0qtTJHZp.bat
          • Size 215B
          • SHA256 3f04bcb1ee0c7a336cebb706ac8beb79bef3e4cdf243e5cb9e055592dc87b000
          • MD5 SHA1 SHA512

          memory/4304-5-0x0000000002ED0000-0x0000000002ED8000-memory.dmp

          memory/4304-3-0x0000000002EB0000-0x0000000002EBE000-memory.dmp

          memory/4304-4-0x0000000002EC0000-0x0000000002ECE000-memory.dmp

          memory/4304-6-0x0000000002EE0000-0x0000000002EFC000-memory.dmp

          memory/4304-0-0x00007FFB5AE73000-0x00007FFB5AE75000-memory.dmp

          memory/4304-9-0x0000000002F10000-0x0000000002F20000-memory.dmp

          memory/4304-8-0x0000000002F00000-0x0000000002F08000-memory.dmp

          memory/4304-7-0x000000001B860000-0x000000001B8B0000-memory.dmp

          memory/4304-10-0x0000000002F20000-0x0000000002F36000-memory.dmp

          memory/4304-11-0x0000000002F40000-0x0000000002F48000-memory.dmp

          memory/4304-2-0x00007FFB5AE70000-0x00007FFB5B931000-memory.dmp

          memory/4304-1-0x0000000000A30000-0x0000000000B90000-memory.dmp

          memory/4304-38-0x00007FFB5AE70000-0x00007FFB5B931000-memory.dmp