Analysis

  • max time kernel
    118s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    22/03/2025, 06:14

General

  • Target

    9fc6b7a531664647e76420f006504fe4.exe

  • Size

    783KB

  • MD5

    9fc6b7a531664647e76420f006504fe4

  • SHA1

    719f7a1a72fd0a3868802dba03915489e405096d

  • SHA256

    1b9c3ff779aff3d88db47afc5230aeaa0b3332db3fb39f8604eadc5c13a351d3

  • SHA512

    9a340891c5a12cc53e3a0466b4c7e8aa6aa89a0110f8a789d5a1950ab7541fbb707d0af98c90517894ea0acdd63f94a7d6d58b69cdb26f7e5cf30a4848587d3d

  • SSDEEP

    12288:GqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:G+OQbpbgsFdAyQvzSqaq8q

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 8 IoCs

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

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 4 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 8 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in System32 directory 16 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 8 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 9 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\9fc6b7a531664647e76420f006504fe4.exe
    "C:\Users\Admin\AppData\Local\Temp\9fc6b7a531664647e76420f006504fe4.exe"
    1⤵
    • UAC bypass
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2200
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\oEtKs0sP0w.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2768
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:2320
        • C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPSVC\OSPPSVC.exe
          "C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPSVC\OSPPSVC.exe"
          3⤵
          • UAC bypass
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • System policy modification
          PID:2132
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\System32\mciavi32\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2712
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\PerfLogs\Admin\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2896
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\lsm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2796
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2752
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPSVC\OSPPSVC.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2600
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\Firewall\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2216
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\PnPutil\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2508
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\System32\iasdatastore\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1668

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPSVC\OSPPSVC.exe

      Filesize

      783KB

      MD5

      9fc6b7a531664647e76420f006504fe4

      SHA1

      719f7a1a72fd0a3868802dba03915489e405096d

      SHA256

      1b9c3ff779aff3d88db47afc5230aeaa0b3332db3fb39f8604eadc5c13a351d3

      SHA512

      9a340891c5a12cc53e3a0466b4c7e8aa6aa89a0110f8a789d5a1950ab7541fbb707d0af98c90517894ea0acdd63f94a7d6d58b69cdb26f7e5cf30a4848587d3d

    • C:\Users\Admin\AppData\Local\Temp\oEtKs0sP0w.bat

      Filesize

      263B

      MD5

      7e13e78eb72bddd1e7812717b24f906a

      SHA1

      c359561c2c798282c0848bf8a9da464d81056ae3

      SHA256

      970010efc52965377f55ef9bde8690536c12488668c4fbc6b6be941afa9a761d

      SHA512

      fa5a44052ea1d6eb5bbdd9793216e89b43d3eb8ca566255d1d488fa31a2f8a0b0ddc096259e47f4d4f211b7998f0d235dc26e0d57fdd533a4b8e03408d771df8

    • C:\Windows\System32\PnPutil\RCXCC0D.tmp

      Filesize

      783KB

      MD5

      533e01aca1e94c8e0bf7bd8f0b42179d

      SHA1

      2cf38154e253bdbedf66f39a602d53982ca8eea9

      SHA256

      6c9a5d6e902704d5987796a37ba70baf0c79b78bc787ac215698c1d20de4bef9

      SHA512

      8dfc74d74c63212cb48ad285d4eb8b142cf946dbd5f7fcd06cc763448535863cccc4699ae39bfb064fee705f400af14ce85802acfe9f3427329f5e843d4829a6

    • memory/2132-102-0x0000000000E80000-0x0000000000F4A000-memory.dmp

      Filesize

      808KB

    • memory/2200-17-0x0000000000470000-0x0000000000478000-memory.dmp

      Filesize

      32KB

    • memory/2200-18-0x0000000002180000-0x0000000002188000-memory.dmp

      Filesize

      32KB

    • memory/2200-12-0x0000000000410000-0x0000000000418000-memory.dmp

      Filesize

      32KB

    • memory/2200-11-0x00000000003E0000-0x00000000003E8000-memory.dmp

      Filesize

      32KB

    • memory/2200-10-0x00000000001B0000-0x00000000001B8000-memory.dmp

      Filesize

      32KB

    • memory/2200-13-0x00000000003F0000-0x00000000003F8000-memory.dmp

      Filesize

      32KB

    • memory/2200-8-0x00000000001C0000-0x00000000001CA000-memory.dmp

      Filesize

      40KB

    • memory/2200-7-0x00000000003D0000-0x00000000003DC000-memory.dmp

      Filesize

      48KB

    • memory/2200-6-0x0000000000190000-0x0000000000198000-memory.dmp

      Filesize

      32KB

    • memory/2200-4-0x0000000000160000-0x0000000000168000-memory.dmp

      Filesize

      32KB

    • memory/2200-0-0x000007FEF6113000-0x000007FEF6114000-memory.dmp

      Filesize

      4KB

    • memory/2200-16-0x0000000000460000-0x0000000000468000-memory.dmp

      Filesize

      32KB

    • memory/2200-14-0x0000000000400000-0x0000000000408000-memory.dmp

      Filesize

      32KB

    • memory/2200-9-0x00000000001A0000-0x00000000001AA000-memory.dmp

      Filesize

      40KB

    • memory/2200-15-0x0000000000440000-0x0000000000448000-memory.dmp

      Filesize

      32KB

    • memory/2200-20-0x0000000000480000-0x0000000000488000-memory.dmp

      Filesize

      32KB

    • memory/2200-19-0x0000000000450000-0x0000000000458000-memory.dmp

      Filesize

      32KB

    • memory/2200-21-0x0000000000420000-0x000000000042C000-memory.dmp

      Filesize

      48KB

    • memory/2200-22-0x0000000000430000-0x0000000000438000-memory.dmp

      Filesize

      32KB

    • memory/2200-25-0x000007FEF6110000-0x000007FEF6AFC000-memory.dmp

      Filesize

      9.9MB

    • memory/2200-5-0x0000000000180000-0x0000000000190000-memory.dmp

      Filesize

      64KB

    • memory/2200-3-0x0000000000150000-0x0000000000158000-memory.dmp

      Filesize

      32KB

    • memory/2200-2-0x000007FEF6110000-0x000007FEF6AFC000-memory.dmp

      Filesize

      9.9MB

    • memory/2200-99-0x000007FEF6110000-0x000007FEF6AFC000-memory.dmp

      Filesize

      9.9MB

    • memory/2200-1-0x00000000009C0000-0x0000000000A8A000-memory.dmp

      Filesize

      808KB