Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-11-2024 01:06

General

  • Target

    8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

  • Size

    682KB

  • MD5

    054590792d65d5db6a5270d6ad965b93

  • SHA1

    bd04bb88a8ee09284e3e0eba53677f6b999d1b46

  • SHA256

    8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c

  • SHA512

    818e9a0ee0fa54874b811cd6fd5f61fc014508c84ec8f09f4d53b52a1f12a15a1b1cc516c35189352bc328c2cde659f969dfc6741b1319ba91689a2a19dce07e

  • SSDEEP

    12288:RqnO3mwJNoGFAgHCRvp1i/fjqJRYFInDrX/xTU3JgXDV6blx1wgtra7B:R+O3mwJnCRvEMxnDVSwgY

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 6 IoCs

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

  • UAC bypass 3 TTPs 3 IoCs
  • DCRat payload 5 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
  • Adds Run key to start application 2 TTPs 6 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Drops file in System32 directory 5 IoCs
  • Drops file in Program Files directory 15 IoCs
  • Drops file in Windows directory 5 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 6 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs
  • System policy modification 1 TTPs 3 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\8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
    "C:\Users\Admin\AppData\Local\Temp\8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in System32 directory
    • 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:4276
    • C:\Program Files\Common Files\System\Ole DB\fr-FR\fontdrvhost.exe
      "C:\Program Files\Common Files\System\Ole DB\fr-FR\fontdrvhost.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1236
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\dsdmo\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4740
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files\Windows Mail\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4028
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.pt-br\OfficeClickToRun.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2228
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files\Common Files\System\Ole DB\fr-FR\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3260
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2772
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\Setup\State\sysmon.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2176

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files\Windows Mail\explorer.exe

    Filesize

    682KB

    MD5

    57138579f35037c73c011be48e0828cc

    SHA1

    9ba4996fff2296ed1021cbd657ee527c906d42b0

    SHA256

    02cd672db23dc53419f5b58ee59bb01ea724573f6fb749a97057b91b28f94c0e

    SHA512

    78d80240ab33cde006b9b67a75a77e42a4f2d9a1deb70bacad3cbcb5c08f0737a7bfe408c4c52f459f1504b62bdfe23521fad0f761a733251538fbedd0c04e51

  • C:\Recovery\WindowsRE\SearchApp.exe

    Filesize

    682KB

    MD5

    054590792d65d5db6a5270d6ad965b93

    SHA1

    bd04bb88a8ee09284e3e0eba53677f6b999d1b46

    SHA256

    8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c

    SHA512

    818e9a0ee0fa54874b811cd6fd5f61fc014508c84ec8f09f4d53b52a1f12a15a1b1cc516c35189352bc328c2cde659f969dfc6741b1319ba91689a2a19dce07e

  • C:\Recovery\WindowsRE\SearchApp.exe

    Filesize

    682KB

    MD5

    623bfad8941dbe5ec0196d4d28f67500

    SHA1

    c1f0e474b55840860865ac569649fffd92cab249

    SHA256

    bd7749dccde3274799e4d123a2b64be3bf969fa3a93a78c1be678d1a8f809bbc

    SHA512

    b5ef6c942513ac47ef1aa35a2fe5f6b4f5e11607ec2b7f28a9f9175cf9c9d4778f4b37674885624c205818bc9318e3552d8dd3b2d2d6d0c61435b81cd189e48b

  • C:\Windows\Setup\State\sysmon.exe

    Filesize

    682KB

    MD5

    b9b2e77915b0c905c6cae41ede4fd76d

    SHA1

    684e64c8c72a4eec5340b177440723bfca705bcb

    SHA256

    f25b972cc89406b7612244fbf23bc607661fb2407105f365d5499d78e0dbe2a1

    SHA512

    ca70099f17dab341d2cc05306b899a85d3914586828d8a9c969aa38a94c350f5e781ddb70b5d1b08f759863b974c00e437287dc4f854e08d789e6c1b3bb6151d

  • memory/4276-3-0x0000000000D20000-0x0000000000D30000-memory.dmp

    Filesize

    64KB

  • memory/4276-5-0x0000000002610000-0x000000000261C000-memory.dmp

    Filesize

    48KB

  • memory/4276-6-0x0000000000D40000-0x0000000000D4A000-memory.dmp

    Filesize

    40KB

  • memory/4276-7-0x0000000000D30000-0x0000000000D38000-memory.dmp

    Filesize

    32KB

  • memory/4276-8-0x000000001AF20000-0x000000001AF2C000-memory.dmp

    Filesize

    48KB

  • memory/4276-4-0x0000000002620000-0x000000000262C000-memory.dmp

    Filesize

    48KB

  • memory/4276-0-0x00007FFFFBD73000-0x00007FFFFBD75000-memory.dmp

    Filesize

    8KB

  • memory/4276-2-0x00007FFFFBD70000-0x00007FFFFC831000-memory.dmp

    Filesize

    10.8MB

  • memory/4276-1-0x00000000003C0000-0x0000000000472000-memory.dmp

    Filesize

    712KB

  • memory/4276-154-0x00007FFFFBD70000-0x00007FFFFC831000-memory.dmp

    Filesize

    10.8MB