Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-11-2024 02:04

General

  • Target

    0c0b4ee3d14fa4db0bc8268ed908480dd3b977fa3c98bcb930a52fc2839d35b4.exe

  • Size

    1.2MB

  • MD5

    31970365cad3425aa523a7815d695f3c

  • SHA1

    1c6196284ec2666000bda7c091cda224fad77473

  • SHA256

    0c0b4ee3d14fa4db0bc8268ed908480dd3b977fa3c98bcb930a52fc2839d35b4

  • SHA512

    7e95cf8c6ac59ab53c8cdaca6fab41ff7c968afa692f88b2bb90966db9eb1682ac969043d1fea6db876b7df3665dfc522b736257db798e574b2344626c0bde49

  • SSDEEP

    24576:LJlmUJyTmqFOGfeRIvZ6+adOSMZgrWoIaWrcX:evU+a/rSro

Malware Config

Signatures

  • DcRat 16 IoCs

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Dcrat family
  • Modifies WinLogon for persistence 2 TTPs 5 IoCs
  • Process spawned unexpected child process 15 IoCs

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

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 2 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 11 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • 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 10 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Program Files directory 20 IoCs
  • Drops file in Windows directory 2 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 15 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 13 IoCs
  • Suspicious use of WriteProcessMemory 24 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\0c0b4ee3d14fa4db0bc8268ed908480dd3b977fa3c98bcb930a52fc2839d35b4.exe
    "C:\Users\Admin\AppData\Local\Temp\0c0b4ee3d14fa4db0bc8268ed908480dd3b977fa3c98bcb930a52fc2839d35b4.exe"
    1⤵
    • DcRat
    • Modifies WinLogon for persistence
    • UAC bypass
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • 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:3368
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3168
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/$Recycle.Bin/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2044
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Documents and Settings/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2432
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/PerfLogs/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1604
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3412
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files (x86)/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3156
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/ProgramData/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:5076
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Recovery/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1056
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/System Volume Information/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3528
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Users/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4444
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Windows/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3108
    • C:\Program Files (x86)\Windows Portable Devices\MusNotification.exe
      "C:\Program Files (x86)\Windows Portable Devices\MusNotification.exe"
      2⤵
      • UAC bypass
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:4420
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows NT\Accessories\es-ES\fontdrvhost.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4808
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files\Windows NT\Accessories\es-ES\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2472
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows NT\Accessories\es-ES\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:5084
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "MusNotificationM" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Portable Devices\MusNotification.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3260
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "MusNotification" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\MusNotification.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4800
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "MusNotificationM" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Portable Devices\MusNotification.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3972
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 9 /tr "'C:\Program Files\Internet Explorer\SIGNUP\smss.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4832
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files\Internet Explorer\SIGNUP\smss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1624
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\Program Files\Internet Explorer\SIGNUP\smss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4716
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Defender\csrss.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3508
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\csrss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3716
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Defender\csrss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:472
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\dllhost.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:468
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2952
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3520
  • C:\Windows\system32\wbem\WmiApSrv.exe
    C:\Windows\system32\wbem\WmiApSrv.exe
    1⤵
      PID:4556

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\dllhost.exe

      Filesize

      1.2MB

      MD5

      31970365cad3425aa523a7815d695f3c

      SHA1

      1c6196284ec2666000bda7c091cda224fad77473

      SHA256

      0c0b4ee3d14fa4db0bc8268ed908480dd3b977fa3c98bcb930a52fc2839d35b4

      SHA512

      7e95cf8c6ac59ab53c8cdaca6fab41ff7c968afa692f88b2bb90966db9eb1682ac969043d1fea6db876b7df3665dfc522b736257db798e574b2344626c0bde49

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

      Filesize

      2KB

      MD5

      d85ba6ff808d9e5444a4b369f5bc2730

      SHA1

      31aa9d96590fff6981b315e0b391b575e4c0804a

      SHA256

      84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

      SHA512

      8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      944B

      MD5

      cadef9abd087803c630df65264a6c81c

      SHA1

      babbf3636c347c8727c35f3eef2ee643dbcc4bd2

      SHA256

      cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

      SHA512

      7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      944B

      MD5

      3a6bad9528f8e23fb5c77fbd81fa28e8

      SHA1

      f127317c3bc6407f536c0f0600dcbcf1aabfba36

      SHA256

      986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05

      SHA512

      846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      944B

      MD5

      5f0ddc7f3691c81ee14d17b419ba220d

      SHA1

      f0ef5fde8bab9d17c0b47137e014c91be888ee53

      SHA256

      a31805264b8b13ce4145f272cb2830728c186c46e314b48514d636866217add5

      SHA512

      2ce7c2a0833f581297c13dd88ccfcd36bf129d2b5d7718c52b1d67c97cbd8fc93abc085a040229a0fd712e880c690de7f6b996b0b47c46a091fabb7931be58d3

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      944B

      MD5

      28d4235aa2e6d782751f980ceb6e5021

      SHA1

      f5d82d56acd642b9fc4b963f684fd6b78f25a140

      SHA256

      8c66720f953e82cfbd8f00543c42c0cf77c3d97787ec09cb3e1e2ba5819bd638

      SHA512

      dba1bd6600f5affcfdc33a59e7ac853ee5fdfafb8d1407a1768728bd4f66ef6b49437214716b7e33e3de91d7ce95709050a3dab4354dd62acaf1de28107017a2

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      944B

      MD5

      e243a38635ff9a06c87c2a61a2200656

      SHA1

      ecd95ed5bf1a9fbe96a8448fc2814a0210fa2afc

      SHA256

      af5782703f3f2d5a29fb313dae6680a64134db26064d4a321a3f23b75f6ca00f

      SHA512

      4418957a1b10eee44cf270c81816ae707352411c4f5ac14b6b61ab537c91480e24e0a0a2c276a6291081b4984c123cf673a45dcedb0ceeef682054ba0fc19cb4

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      944B

      MD5

      aaaac7c68d2b7997ed502c26fd9f65c2

      SHA1

      7c5a3731300d672bf53c43e2f9e951c745f7fbdf

      SHA256

      8724dc2c3c8e8f17aeefae44a23741b1ea3b43c490fbc52fd61575ffe1cd82bb

      SHA512

      c526febd9430413b48bed976edd9a795793ad1f06c8ff4f6b768b4ad63f4d2f06b9da72d4fcfa7cb9530a64e2dc3554f5ad97fd0ab60129701d175f2724ef1ac

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      944B

      MD5

      bd5940f08d0be56e65e5f2aaf47c538e

      SHA1

      d7e31b87866e5e383ab5499da64aba50f03e8443

      SHA256

      2d2f364c75bd2897504249f42cdf1d19374f5230aad68fa9154ea3d03e3031a6

      SHA512

      c34d10c7e07da44a180fae9889b61f08903aa84e8ddfa80c31c272b1ef9d491b8cec6b8a4c836c3cb1583fe8f4955c6a8db872515de3a9e10eae09610c959406

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ywbjrd25.uw3.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • memory/3368-6-0x0000000002E50000-0x0000000002E58000-memory.dmp

      Filesize

      32KB

    • memory/3368-220-0x00007FF940710000-0x00007FF9411D1000-memory.dmp

      Filesize

      10.8MB

    • memory/3368-12-0x0000000002EC0000-0x0000000002ECC000-memory.dmp

      Filesize

      48KB

    • memory/3368-13-0x0000000002ED0000-0x0000000002EDC000-memory.dmp

      Filesize

      48KB

    • memory/3368-10-0x0000000002E90000-0x0000000002E9C000-memory.dmp

      Filesize

      48KB

    • memory/3368-1-0x0000000000BD0000-0x0000000000D02000-memory.dmp

      Filesize

      1.2MB

    • memory/3368-8-0x0000000002E70000-0x0000000002E7C000-memory.dmp

      Filesize

      48KB

    • memory/3368-11-0x0000000002EB0000-0x0000000002EB8000-memory.dmp

      Filesize

      32KB

    • memory/3368-9-0x0000000002E80000-0x0000000002E88000-memory.dmp

      Filesize

      32KB

    • memory/3368-3-0x00000000015D0000-0x00000000015D8000-memory.dmp

      Filesize

      32KB

    • memory/3368-0-0x00007FF940713000-0x00007FF940715000-memory.dmp

      Filesize

      8KB

    • memory/3368-7-0x0000000002E60000-0x0000000002E6A000-memory.dmp

      Filesize

      40KB

    • memory/3368-5-0x0000000001650000-0x0000000001658000-memory.dmp

      Filesize

      32KB

    • memory/3368-4-0x00000000015E0000-0x00000000015F0000-memory.dmp

      Filesize

      64KB

    • memory/3368-2-0x00007FF940710000-0x00007FF9411D1000-memory.dmp

      Filesize

      10.8MB

    • memory/4444-109-0x000002B2CE5E0000-0x000002B2CE602000-memory.dmp

      Filesize

      136KB