Analysis

  • max time kernel
    179s
  • max time network
    185s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/10/2023, 05:16

General

  • Target

    000c25f85640678f636a31909dbf94e7.exe

  • Size

    1.7MB

  • MD5

    000c25f85640678f636a31909dbf94e7

  • SHA1

    55b1fca413b176d243caf796af4358a510ad931a

  • SHA256

    5a41a105b733d97acc93315066ac39f50c2d2923df02d86c5b0b143fc3e82ff6

  • SHA512

    93ea97e0334d94269ca888b347c24bc8215ac5b579be9816b5328c8439287048484b08bd9a41c4465aaeebbc9e2d8b9bd953c52d74f987206e8ceff1a5adf5d5

  • SSDEEP

    12288:y+CW3EFxVkNFuwoUDInV/kg0d0lx743tIm2atsbWvL50R0cf9AQyIpHnMuDaP41:yg3BNloUDi4LFueIyR+w7V33Vd

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 18 IoCs

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

  • DCRat payload 1 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 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 9 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 18 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 25 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\000c25f85640678f636a31909dbf94e7.exe
    "C:\Users\Admin\AppData\Local\Temp\000c25f85640678f636a31909dbf94e7.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1508
    • C:\Users\Admin\AppData\Local\Temp\000c25f85640678f636a31909dbf94e7.exe
      "C:\Users\Admin\AppData\Local\Temp\000c25f85640678f636a31909dbf94e7.exe"
      2⤵
      • Checks computer location settings
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3844
      • C:\odt\RuntimeBroker.exe
        "C:\odt\RuntimeBroker.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2492
        • C:\odt\RuntimeBroker.exe
          "C:\odt\RuntimeBroker.exe"
          4⤵
          • Executes dropped EXE
          PID:4136
        • C:\odt\RuntimeBroker.exe
          "C:\odt\RuntimeBroker.exe"
          4⤵
          • Executes dropped EXE
          PID:1816
        • C:\odt\RuntimeBroker.exe
          "C:\odt\RuntimeBroker.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4656
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Security\BrowserCore\en-US\fontdrvhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3480
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files\Windows Security\BrowserCore\en-US\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4752
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Security\BrowserCore\en-US\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2920
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Internet Explorer\SIGNUP\lsass.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2360
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files (x86)\Internet Explorer\SIGNUP\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3828
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Internet Explorer\SIGNUP\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4804
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Common Files\Java\Java Update\smss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:5068
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Common Files\Java\Java Update\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3544
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Common Files\Java\Java Update\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3376
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\sihost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3688
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\sihost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4988
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\sihost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4840
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\ja\OfficeClickToRun.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1532
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\ja\OfficeClickToRun.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4016
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\ja\OfficeClickToRun.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1384
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\odt\RuntimeBroker.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3740
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\odt\RuntimeBroker.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3076
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\odt\RuntimeBroker.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2436

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\ja\OfficeClickToRun.exe

          Filesize

          1.7MB

          MD5

          000c25f85640678f636a31909dbf94e7

          SHA1

          55b1fca413b176d243caf796af4358a510ad931a

          SHA256

          5a41a105b733d97acc93315066ac39f50c2d2923df02d86c5b0b143fc3e82ff6

          SHA512

          93ea97e0334d94269ca888b347c24bc8215ac5b579be9816b5328c8439287048484b08bd9a41c4465aaeebbc9e2d8b9bd953c52d74f987206e8ceff1a5adf5d5

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\000c25f85640678f636a31909dbf94e7.exe.log

          Filesize

          321B

          MD5

          baf5d1398fdb79e947b60fe51e45397f

          SHA1

          49e7b8389f47b93509d621b8030b75e96bb577af

          SHA256

          10c8c7b5fa58f8c6b69f44e92a4e2af111b59fcf4f21a07e04b19e14876ccdf8

          SHA512

          b2c9ef5581d5eae7c17ae260fe9f52344ed737fa851cb44d1cea58a32359d0ac5d0ca3099c970209bd30a0d4af6e504101f21b7054cf5eca91c0831cf12fb413

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\RuntimeBroker.exe.log

          Filesize

          321B

          MD5

          baf5d1398fdb79e947b60fe51e45397f

          SHA1

          49e7b8389f47b93509d621b8030b75e96bb577af

          SHA256

          10c8c7b5fa58f8c6b69f44e92a4e2af111b59fcf4f21a07e04b19e14876ccdf8

          SHA512

          b2c9ef5581d5eae7c17ae260fe9f52344ed737fa851cb44d1cea58a32359d0ac5d0ca3099c970209bd30a0d4af6e504101f21b7054cf5eca91c0831cf12fb413

        • C:\odt\RuntimeBroker.exe

          Filesize

          1.7MB

          MD5

          000c25f85640678f636a31909dbf94e7

          SHA1

          55b1fca413b176d243caf796af4358a510ad931a

          SHA256

          5a41a105b733d97acc93315066ac39f50c2d2923df02d86c5b0b143fc3e82ff6

          SHA512

          93ea97e0334d94269ca888b347c24bc8215ac5b579be9816b5328c8439287048484b08bd9a41c4465aaeebbc9e2d8b9bd953c52d74f987206e8ceff1a5adf5d5

        • C:\odt\RuntimeBroker.exe

          Filesize

          1.7MB

          MD5

          000c25f85640678f636a31909dbf94e7

          SHA1

          55b1fca413b176d243caf796af4358a510ad931a

          SHA256

          5a41a105b733d97acc93315066ac39f50c2d2923df02d86c5b0b143fc3e82ff6

          SHA512

          93ea97e0334d94269ca888b347c24bc8215ac5b579be9816b5328c8439287048484b08bd9a41c4465aaeebbc9e2d8b9bd953c52d74f987206e8ceff1a5adf5d5

        • C:\odt\RuntimeBroker.exe

          Filesize

          1.7MB

          MD5

          000c25f85640678f636a31909dbf94e7

          SHA1

          55b1fca413b176d243caf796af4358a510ad931a

          SHA256

          5a41a105b733d97acc93315066ac39f50c2d2923df02d86c5b0b143fc3e82ff6

          SHA512

          93ea97e0334d94269ca888b347c24bc8215ac5b579be9816b5328c8439287048484b08bd9a41c4465aaeebbc9e2d8b9bd953c52d74f987206e8ceff1a5adf5d5

        • C:\odt\RuntimeBroker.exe

          Filesize

          1.7MB

          MD5

          000c25f85640678f636a31909dbf94e7

          SHA1

          55b1fca413b176d243caf796af4358a510ad931a

          SHA256

          5a41a105b733d97acc93315066ac39f50c2d2923df02d86c5b0b143fc3e82ff6

          SHA512

          93ea97e0334d94269ca888b347c24bc8215ac5b579be9816b5328c8439287048484b08bd9a41c4465aaeebbc9e2d8b9bd953c52d74f987206e8ceff1a5adf5d5

        • C:\odt\RuntimeBroker.exe

          Filesize

          1.7MB

          MD5

          000c25f85640678f636a31909dbf94e7

          SHA1

          55b1fca413b176d243caf796af4358a510ad931a

          SHA256

          5a41a105b733d97acc93315066ac39f50c2d2923df02d86c5b0b143fc3e82ff6

          SHA512

          93ea97e0334d94269ca888b347c24bc8215ac5b579be9816b5328c8439287048484b08bd9a41c4465aaeebbc9e2d8b9bd953c52d74f987206e8ceff1a5adf5d5

        • memory/1508-1-0x00000000003D0000-0x0000000000582000-memory.dmp

          Filesize

          1.7MB

        • memory/1508-3-0x0000000002930000-0x000000000293A000-memory.dmp

          Filesize

          40KB

        • memory/1508-0-0x0000000074740000-0x0000000074EF0000-memory.dmp

          Filesize

          7.7MB

        • memory/1508-2-0x0000000005540000-0x0000000005AE4000-memory.dmp

          Filesize

          5.6MB

        • memory/1508-8-0x0000000074740000-0x0000000074EF0000-memory.dmp

          Filesize

          7.7MB

        • memory/2492-34-0x0000000074740000-0x0000000074EF0000-memory.dmp

          Filesize

          7.7MB

        • memory/2492-41-0x0000000074740000-0x0000000074EF0000-memory.dmp

          Filesize

          7.7MB

        • memory/3844-9-0x0000000005720000-0x0000000005730000-memory.dmp

          Filesize

          64KB

        • memory/3844-7-0x0000000074740000-0x0000000074EF0000-memory.dmp

          Filesize

          7.7MB

        • memory/3844-33-0x0000000074740000-0x0000000074EF0000-memory.dmp

          Filesize

          7.7MB

        • memory/3844-4-0x0000000000400000-0x0000000000456000-memory.dmp

          Filesize

          344KB

        • memory/3844-12-0x0000000005D80000-0x0000000005DE6000-memory.dmp

          Filesize

          408KB

        • memory/4656-42-0x0000000074740000-0x0000000074EF0000-memory.dmp

          Filesize

          7.7MB

        • memory/4656-43-0x0000000074740000-0x0000000074EF0000-memory.dmp

          Filesize

          7.7MB

        • memory/4656-44-0x0000000074740000-0x0000000074EF0000-memory.dmp

          Filesize

          7.7MB