Analysis

  • max time kernel
    137s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-03-2023 14:35

General

  • Target

    af625576485e2091fbfa4568c3a3c546bd2a8f470cb69afa09f6bcf0ebac1d1e.exe

  • Size

    1.3MB

  • MD5

    33dbb523c14738bf48d314111c00906c

  • SHA1

    83da7977d5b08038fac809b0f7c9a57c008f285e

  • SHA256

    af625576485e2091fbfa4568c3a3c546bd2a8f470cb69afa09f6bcf0ebac1d1e

  • SHA512

    e1eadb73b5091d62afb166d81a244173073bca7f0c09fcfd22138f26705100dda11639eb662e16d2624bcc627805b46de540fa43e527835cec9a8515adc809e2

  • SSDEEP

    24576:Qc1ovc94+x/XIzyRGezpFezu4GTVSbvaBTJpbvol3:FG3+xz9lFezFGT8bEda

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 4 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 4 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 14 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\af625576485e2091fbfa4568c3a3c546bd2a8f470cb69afa09f6bcf0ebac1d1e.exe
    "C:\Users\Admin\AppData\Local\Temp\af625576485e2091fbfa4568c3a3c546bd2a8f470cb69afa09f6bcf0ebac1d1e.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:2144
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\Q1xMv6jDgI.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3084
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:1068
        • C:\odt\dllhost.exe
          "C:\odt\dllhost.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1640
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\fontdrvhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:432
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5036
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2640
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 10 /tr "'C:\Windows\LiveKernelReports\backgroundTaskHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2968
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\LiveKernelReports\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2196
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 5 /tr "'C:\Windows\LiveKernelReports\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2080
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 9 /tr "'C:\Users\Default\NetHood\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3928
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Default\NetHood\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4868
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 14 /tr "'C:\Users\Default\NetHood\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:320
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 13 /tr "'C:\odt\backgroundTaskHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:208
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\odt\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1760
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 7 /tr "'C:\odt\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2964
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 7 /tr "'C:\Windows\SoftwareDistribution\SLS\855E8A7C-ECB4-4CA3-B045-1DFA50104289\taskhostw.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1456
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\SoftwareDistribution\SLS\855E8A7C-ECB4-4CA3-B045-1DFA50104289\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3556
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 7 /tr "'C:\Windows\SoftwareDistribution\SLS\855E8A7C-ECB4-4CA3-B045-1DFA50104289\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2188
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\Users\All Users\WindowsHolographicDevices\SpatialStore\smss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1732
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Users\All Users\WindowsHolographicDevices\SpatialStore\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1888
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 10 /tr "'C:\Users\All Users\WindowsHolographicDevices\SpatialStore\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1040
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Defender\es-ES\upfc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:552
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\es-ES\upfc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2136
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Defender\es-ES\upfc.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 "SppExtComObjS" /sc MINUTE /mo 10 /tr "'C:\Program Files\Mozilla Firefox\browser\features\SppExtComObj.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3908
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Program Files\Mozilla Firefox\browser\features\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2232
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 8 /tr "'C:\Program Files\Mozilla Firefox\browser\features\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1828
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 12 /tr "'C:\odt\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3904
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\odt\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4624
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\odt\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4364
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\sppsvc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2960
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4844
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3400

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\Q1xMv6jDgI.bat

      Filesize

      183B

      MD5

      5ddec5d538d4772b68148b67814392d4

      SHA1

      66b427e546a9dd6eee4c35b280171bc75d36e6e3

      SHA256

      87cedfa7e828f4cee5e2264b8bf705affbcd958118ff31cad63a604412153a21

      SHA512

      c48b6e289abf2daab171e54c5faddb3877280a241bd99079d64e446cfd8ec7465ead85a0215593b11d3cbacd7d2d1bfbbaa2af47f38d552cd52df607f87259b0

    • C:\Windows\SoftwareDistribution\SLS\855E8A7C-ECB4-4CA3-B045-1DFA50104289\taskhostw.exe

      Filesize

      1.3MB

      MD5

      33dbb523c14738bf48d314111c00906c

      SHA1

      83da7977d5b08038fac809b0f7c9a57c008f285e

      SHA256

      af625576485e2091fbfa4568c3a3c546bd2a8f470cb69afa09f6bcf0ebac1d1e

      SHA512

      e1eadb73b5091d62afb166d81a244173073bca7f0c09fcfd22138f26705100dda11639eb662e16d2624bcc627805b46de540fa43e527835cec9a8515adc809e2

    • C:\odt\dllhost.exe

      Filesize

      1.3MB

      MD5

      33dbb523c14738bf48d314111c00906c

      SHA1

      83da7977d5b08038fac809b0f7c9a57c008f285e

      SHA256

      af625576485e2091fbfa4568c3a3c546bd2a8f470cb69afa09f6bcf0ebac1d1e

      SHA512

      e1eadb73b5091d62afb166d81a244173073bca7f0c09fcfd22138f26705100dda11639eb662e16d2624bcc627805b46de540fa43e527835cec9a8515adc809e2

    • C:\odt\dllhost.exe

      Filesize

      1.3MB

      MD5

      33dbb523c14738bf48d314111c00906c

      SHA1

      83da7977d5b08038fac809b0f7c9a57c008f285e

      SHA256

      af625576485e2091fbfa4568c3a3c546bd2a8f470cb69afa09f6bcf0ebac1d1e

      SHA512

      e1eadb73b5091d62afb166d81a244173073bca7f0c09fcfd22138f26705100dda11639eb662e16d2624bcc627805b46de540fa43e527835cec9a8515adc809e2

    • memory/1640-165-0x0000000000E30000-0x0000000000E40000-memory.dmp

      Filesize

      64KB

    • memory/2144-133-0x0000000000150000-0x00000000002A2000-memory.dmp

      Filesize

      1.3MB

    • memory/2144-134-0x000000001AEC0000-0x000000001AED0000-memory.dmp

      Filesize

      64KB

    • memory/2144-135-0x000000001AED0000-0x000000001AF20000-memory.dmp

      Filesize

      320KB