Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    01-02-2025 13:30

General

  • Target

    aa090051264389519fb5b006d319adcddf9ab171233bb57e0fc562a75779b47d.exe

  • Size

    2.5MB

  • MD5

    da34c7d099c5000156f38b6c73cc0186

  • SHA1

    889fabda7e7b7424c758e9580001826bac0c2910

  • SHA256

    aa090051264389519fb5b006d319adcddf9ab171233bb57e0fc562a75779b47d

  • SHA512

    69ee998e092ef272ae7ce4e61a05ea065b2d12d5c6979b0fca0a760f8f918da254531729569095f5973b1e645a3ef127f6cd727269140434d25aa5d6c960f10e

  • SSDEEP

    49152:cTZXGGaXwpWG3wn8OTvgOP2Z4Ya+pHUvTzYUNBrQYn102KM:AZXGGaXjGgJGHa+teTfQY10A

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 3 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • 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 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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: CmdExeWriteProcessMemorySpam 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 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\aa090051264389519fb5b006d319adcddf9ab171233bb57e0fc562a75779b47d.exe
    "C:\Users\Admin\AppData\Local\Temp\aa090051264389519fb5b006d319adcddf9ab171233bb57e0fc562a75779b47d.exe"
    1⤵
    • UAC bypass
    • 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:1868
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\lbKBZUlOPJ.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1400
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:2328
        • C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\sppsvc.exe
          "C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\sppsvc.exe"
          3⤵
          • UAC bypass
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Suspicious behavior: CmdExeWriteProcessMemorySpam
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • System policy modification
          PID:1328
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 8 /tr "'C:\Windows\de-DE\taskhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2748
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Windows\de-DE\taskhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2644
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 8 /tr "'C:\Windows\de-DE\taskhost.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 "sppsvcs" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Photo Viewer\es-ES\sppsvc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2604
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\es-ES\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2576
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows Photo Viewer\es-ES\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2992
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\wininit.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2600
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\MSOCache\All Users\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2500
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2564
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2440
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2324
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1656
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 6 /tr "'C:\Users\Public\Videos\Sample Videos\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2732
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Users\Public\Videos\Sample Videos\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2672
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 5 /tr "'C:\Users\Public\Videos\Sample Videos\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2836
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 7 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\sppsvc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2936
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2232
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 5 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2228

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      224B

      MD5

      63f1326345caf62ba134722264c96c25

      SHA1

      c76320519b29904624422c5fb31f2a073892cb77

      SHA256

      4abdf69982f3c515b0991dc696c8da0470eb0cf77196c4fbbf44136f76edd8a3

      SHA512

      926d3f2d60023db38c03842ede513e3e278f541c209feee0398e8420779f21f0b955ce2a81a05d142e675e4737c1ba9b71f95c31ead9845e518a5e7f0b5c62bb

    • C:\Users\Public\Videos\Sample Videos\System.exe

      Filesize

      2.5MB

      MD5

      da34c7d099c5000156f38b6c73cc0186

      SHA1

      889fabda7e7b7424c758e9580001826bac0c2910

      SHA256

      aa090051264389519fb5b006d319adcddf9ab171233bb57e0fc562a75779b47d

      SHA512

      69ee998e092ef272ae7ce4e61a05ea065b2d12d5c6979b0fca0a760f8f918da254531729569095f5973b1e645a3ef127f6cd727269140434d25aa5d6c960f10e

    • memory/1328-39-0x0000000000510000-0x0000000000522000-memory.dmp

      Filesize

      72KB

    • memory/1328-38-0x0000000000C20000-0x0000000000EB0000-memory.dmp

      Filesize

      2.6MB

    • memory/1868-10-0x00000000006D0000-0x00000000006D8000-memory.dmp

      Filesize

      32KB

    • memory/1868-13-0x00000000023D0000-0x00000000023D8000-memory.dmp

      Filesize

      32KB

    • memory/1868-6-0x0000000000520000-0x0000000000536000-memory.dmp

      Filesize

      88KB

    • memory/1868-7-0x00000000006C0000-0x00000000006C8000-memory.dmp

      Filesize

      32KB

    • memory/1868-8-0x0000000000760000-0x000000000076A000-memory.dmp

      Filesize

      40KB

    • memory/1868-9-0x0000000000920000-0x0000000000976000-memory.dmp

      Filesize

      344KB

    • memory/1868-0-0x000007FEF5493000-0x000007FEF5494000-memory.dmp

      Filesize

      4KB

    • memory/1868-11-0x0000000000770000-0x0000000000782000-memory.dmp

      Filesize

      72KB

    • memory/1868-12-0x0000000000990000-0x0000000000998000-memory.dmp

      Filesize

      32KB

    • memory/1868-5-0x0000000000270000-0x0000000000278000-memory.dmp

      Filesize

      32KB

    • memory/1868-14-0x00000000023E0000-0x00000000023EC000-memory.dmp

      Filesize

      48KB

    • memory/1868-15-0x00000000023F0000-0x00000000023FE000-memory.dmp

      Filesize

      56KB

    • memory/1868-16-0x0000000002400000-0x000000000240A000-memory.dmp

      Filesize

      40KB

    • memory/1868-17-0x0000000002410000-0x000000000241C000-memory.dmp

      Filesize

      48KB

    • memory/1868-4-0x0000000000250000-0x000000000026C000-memory.dmp

      Filesize

      112KB

    • memory/1868-35-0x000007FEF5490000-0x000007FEF5E7C000-memory.dmp

      Filesize

      9.9MB

    • memory/1868-3-0x0000000000240000-0x000000000024E000-memory.dmp

      Filesize

      56KB

    • memory/1868-2-0x000007FEF5490000-0x000007FEF5E7C000-memory.dmp

      Filesize

      9.9MB

    • memory/1868-1-0x00000000009A0000-0x0000000000C30000-memory.dmp

      Filesize

      2.6MB