Analysis

  • max time kernel
    150s
  • max time network
    151s
  • 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 04:17

General

  • Target

    519bcb8d930b658fa5d0b975c7f74efd297e37c2067753b2020f09147fe86cfa.exe

  • Size

    737KB

  • MD5

    f868ddcb54e0c6ac37b4f7858d871083

  • SHA1

    996f978b1498c8fd01ec1caa5a35e202545b4e14

  • SHA256

    519bcb8d930b658fa5d0b975c7f74efd297e37c2067753b2020f09147fe86cfa

  • SHA512

    bfd37ab7cf85c1a75c9ab81333ccdc0d9583433002cb2866831e4dba617f1adeb0d735e86179e0302ab02afd4dda7349252529ef8ce255687644f3b7a1aef62c

  • SSDEEP

    12288:sRTnNNfL/Yr2kNnmSHJJMA+HCpW3Ari4VVyZC0+1cqwwZ6:sRTnfYTmSpJMA+i3iE0nq/6

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.

  • DCRat payload 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops file in Program Files directory 1 IoCs
  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Modifies registry class 1 IoCs
  • Runs ping.exe 1 TTPs 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 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 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\519bcb8d930b658fa5d0b975c7f74efd297e37c2067753b2020f09147fe86cfa.exe
    "C:\Users\Admin\AppData\Local\Temp\519bcb8d930b658fa5d0b975c7f74efd297e37c2067753b2020f09147fe86cfa.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:3400
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\omSP4W6uQX.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2720
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:1308
        • C:\Windows\system32\PING.EXE
          ping -n 10 localhost
          3⤵
          • System Network Configuration Discovery: Internet Connection Discovery
          • Runs ping.exe
          PID:3056
        • C:\Users\All Users\StartMenuExperienceHost.exe
          "C:\Users\All Users\StartMenuExperienceHost.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          PID:4528
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 13 /tr "'C:\Windows\Performance\WinSAT\SearchApp.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:608
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Windows\Performance\WinSAT\SearchApp.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 "SearchAppS" /sc MINUTE /mo 12 /tr "'C:\Windows\Performance\WinSAT\SearchApp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:440
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 9 /tr "'C:\Windows\L2Schemas\sihost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1484
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Windows\L2Schemas\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1644
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 6 /tr "'C:\Windows\L2Schemas\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1716
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\winlogon.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4916
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1836
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3840
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 13 /tr "'C:\Users\All Users\StartMenuExperienceHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4656
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Users\All Users\StartMenuExperienceHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4488
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 14 /tr "'C:\Users\All Users\StartMenuExperienceHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1928
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 8 /tr "'C:\Users\All Users\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1840
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\All Users\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4056
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Users\All Users\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2348
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "519bcb8d930b658fa5d0b975c7f74efd297e37c2067753b2020f09147fe86cfa5" /sc MINUTE /mo 7 /tr "'C:\Users\Admin\AppData\Local\Temp\519bcb8d930b658fa5d0b975c7f74efd297e37c2067753b2020f09147fe86cfa.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2608
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "519bcb8d930b658fa5d0b975c7f74efd297e37c2067753b2020f09147fe86cfa" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\519bcb8d930b658fa5d0b975c7f74efd297e37c2067753b2020f09147fe86cfa.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:888
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "519bcb8d930b658fa5d0b975c7f74efd297e37c2067753b2020f09147fe86cfa5" /sc MINUTE /mo 7 /tr "'C:\Users\Admin\AppData\Local\Temp\519bcb8d930b658fa5d0b975c7f74efd297e37c2067753b2020f09147fe86cfa.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1464

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\omSP4W6uQX.bat

      Filesize

      174B

      MD5

      9548f6b2a8de10e670f7e4a7a7c2d457

      SHA1

      83d7929b62f5c93b322a6b85ced6986dc7ec816a

      SHA256

      ef9daae7ff47193a385c4854deb8b183617fa6654774cac51f7ed21ce1376ef0

      SHA512

      f29f0db816c8b08ebcfdac24ae6b81a037da7f3c984495bcdbf68ef932e1515ff44b6664cc102e0f3fdcd8e00959b9748a544d9d915969bcda26ca2f781ae4b5

    • C:\Windows\Performance\WinSAT\SearchApp.exe

      Filesize

      737KB

      MD5

      f868ddcb54e0c6ac37b4f7858d871083

      SHA1

      996f978b1498c8fd01ec1caa5a35e202545b4e14

      SHA256

      519bcb8d930b658fa5d0b975c7f74efd297e37c2067753b2020f09147fe86cfa

      SHA512

      bfd37ab7cf85c1a75c9ab81333ccdc0d9583433002cb2866831e4dba617f1adeb0d735e86179e0302ab02afd4dda7349252529ef8ce255687644f3b7a1aef62c

    • memory/3400-4-0x0000000000E90000-0x0000000000E9E000-memory.dmp

      Filesize

      56KB

    • memory/3400-0-0x00007FFC43693000-0x00007FFC43695000-memory.dmp

      Filesize

      8KB

    • memory/3400-5-0x00007FFC43690000-0x00007FFC44151000-memory.dmp

      Filesize

      10.8MB

    • memory/3400-7-0x0000000000ED0000-0x0000000000EEC000-memory.dmp

      Filesize

      112KB

    • memory/3400-10-0x0000000000EF0000-0x0000000000F08000-memory.dmp

      Filesize

      96KB

    • memory/3400-8-0x0000000002940000-0x0000000002990000-memory.dmp

      Filesize

      320KB

    • memory/3400-12-0x00007FFC43690000-0x00007FFC44151000-memory.dmp

      Filesize

      10.8MB

    • memory/3400-2-0x00007FFC43690000-0x00007FFC44151000-memory.dmp

      Filesize

      10.8MB

    • memory/3400-23-0x00007FFC43690000-0x00007FFC44151000-memory.dmp

      Filesize

      10.8MB

    • memory/3400-1-0x0000000000640000-0x00000000006FE000-memory.dmp

      Filesize

      760KB

    • memory/3400-30-0x00007FFC43690000-0x00007FFC44151000-memory.dmp

      Filesize

      10.8MB

    • memory/4528-37-0x000000001C490000-0x000000001C5A5000-memory.dmp

      Filesize

      1.1MB