Analysis

  • max time kernel
    93s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-01-2025 02:07

General

  • Target

    1054af5e9206aa0cb650a4e58900bcd369a554e64eaa89f56cb35cd105386eb5.exe

  • Size

    829KB

  • MD5

    c1f1bea182f1c3477c2f133c3ac26930

  • SHA1

    2145c09d2c3279ac83e844c4d80e7aa219e99b8d

  • SHA256

    1054af5e9206aa0cb650a4e58900bcd369a554e64eaa89f56cb35cd105386eb5

  • SHA512

    6af6336782b29bdab906e4d289cb5c2c8500ba8a20dee53def21960e62afc28ec6756b746b4e4036a30726984a60b656b3d529b4abc119953267e91be4992a4d

  • SSDEEP

    12288:P6TnOzi5kaag8hpT77JJMA+XSpW3Ari4VVyZC0+1cw2jINof7+vEnkdsOZ6:P6TnYa+T7dJMA+i3iE0nHfW6

Malware Config

Signatures

  • DcRat

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

  • Dcrat family
  • Modifies WinLogon for persistence 2 TTPs 6 IoCs
  • Process spawned unexpected child process 18 IoCs

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

  • DCRat payload 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 6 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
  • Reads user/profile data of web browsers 3 TTPs

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

  • Adds Run key to start application 2 TTPs 12 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 5 IoCs
  • Drops file in Windows directory 4 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • 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 use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of WriteProcessMemory 24 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\1054af5e9206aa0cb650a4e58900bcd369a554e64eaa89f56cb35cd105386eb5.exe
    "C:\Users\Admin\AppData\Local\Temp\1054af5e9206aa0cb650a4e58900bcd369a554e64eaa89f56cb35cd105386eb5.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • 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:3692
    • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\iux5hkbw\iux5hkbw.cmdline"
      2⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:4288
      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
        C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESFCBF.tmp" "c:\Windows\System32\CSCC8A0CD127904458C969B3432AF9A8A4.TMP"
        3⤵
          PID:628
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\fr-FR\winlogon.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:1476
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Windows Defender\it-IT\taskhostw.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:1940
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\ModemLogs\winlogon.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:1172
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\PrintHood\TextInputHost.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:4800
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Windows Multimedia Platform\sppsvc.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:992
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\1054af5e9206aa0cb650a4e58900bcd369a554e64eaa89f56cb35cd105386eb5.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:2972
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\Q1irsTjqFp.bat"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1064
        • C:\Windows\system32\chcp.com
          chcp 65001
          3⤵
            PID:4680
          • C:\Windows\system32\PING.EXE
            ping -n 10 localhost
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:4376
          • C:\Program Files (x86)\Windows Multimedia Platform\sppsvc.exe
            "C:\Program Files (x86)\Windows Multimedia Platform\sppsvc.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            PID:1680
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 14 /tr "'C:\Windows\fr-FR\winlogon.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:664
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\fr-FR\winlogon.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2608
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 10 /tr "'C:\Windows\fr-FR\winlogon.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2444
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Defender\it-IT\taskhostw.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4392
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\it-IT\taskhostw.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1964
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Defender\it-IT\taskhostw.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2948
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 6 /tr "'C:\Windows\ModemLogs\winlogon.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2188
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\ModemLogs\winlogon.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3996
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 13 /tr "'C:\Windows\ModemLogs\winlogon.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4716
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\PrintHood\TextInputHost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1256
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Users\Admin\PrintHood\TextInputHost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:624
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\PrintHood\TextInputHost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1960
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\sppsvc.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2920
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Multimedia Platform\sppsvc.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:5004
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\sppsvc.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1828
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "1054af5e9206aa0cb650a4e58900bcd369a554e64eaa89f56cb35cd105386eb51" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\AppData\Local\Temp\1054af5e9206aa0cb650a4e58900bcd369a554e64eaa89f56cb35cd105386eb5.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4544
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "1054af5e9206aa0cb650a4e58900bcd369a554e64eaa89f56cb35cd105386eb5" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\1054af5e9206aa0cb650a4e58900bcd369a554e64eaa89f56cb35cd105386eb5.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3192
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "1054af5e9206aa0cb650a4e58900bcd369a554e64eaa89f56cb35cd105386eb51" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\AppData\Local\Temp\1054af5e9206aa0cb650a4e58900bcd369a554e64eaa89f56cb35cd105386eb5.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3952

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • 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

        6d3e9c29fe44e90aae6ed30ccf799ca8

        SHA1

        c7974ef72264bbdf13a2793ccf1aed11bc565dce

        SHA256

        2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

        SHA512

        60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

        Filesize

        944B

        MD5

        d28a889fd956d5cb3accfbaf1143eb6f

        SHA1

        157ba54b365341f8ff06707d996b3635da8446f7

        SHA256

        21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

        SHA512

        0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

      • C:\Users\Admin\AppData\Local\Temp\Q1irsTjqFp.bat

        Filesize

        189B

        MD5

        f1d1a99362af9a0e3dab17236083d15f

        SHA1

        45982bbd07c5ac711e1390c9f42af5c0c99e7674

        SHA256

        ac7c7cf4e6a7e4029fd658651c0ab1ad82350629993f3505d97ef84405336085

        SHA512

        4f6d6be1942675348fa2c3b69631a72b7c2500823c41d335352f95f3afd93ec4e38f664ea526d871403143e14a891a7d7eb9918baf2105cf41c33851f1a88e35

      • C:\Users\Admin\AppData\Local\Temp\RESFCBF.tmp

        Filesize

        1KB

        MD5

        6e3f436b348e7a72badb3e7b2f53c5c2

        SHA1

        71d8be2808d8cb136ca9a847eeaad498d4495225

        SHA256

        e640520209dab904f0ad258065488b83a44d3d7eb9426d3848f88cf8759dee5a

        SHA512

        cfa11865499f911c50cb1e64af0dcae2f71c1e99db82851512635b37acbe9334325b2d115cf47a392294a4bd89da6d409e33ec4ecc100a65bb79afa7ea34721c

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vbbn0z4q.eob.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Windows\fr-FR\winlogon.exe

        Filesize

        829KB

        MD5

        c1f1bea182f1c3477c2f133c3ac26930

        SHA1

        2145c09d2c3279ac83e844c4d80e7aa219e99b8d

        SHA256

        1054af5e9206aa0cb650a4e58900bcd369a554e64eaa89f56cb35cd105386eb5

        SHA512

        6af6336782b29bdab906e4d289cb5c2c8500ba8a20dee53def21960e62afc28ec6756b746b4e4036a30726984a60b656b3d529b4abc119953267e91be4992a4d

      • \??\c:\Users\Admin\AppData\Local\Temp\iux5hkbw\iux5hkbw.0.cs

        Filesize

        361B

        MD5

        10d2c2d6cc5bfae73affc9ecba0c69d0

        SHA1

        9c60bdfbb19d2fb0f26bc6352ef23e0b5a22e017

        SHA256

        3650c3522b3a54fa3d7cf1004a394b8b37ab4c62ff19200603e309b3bc818643

        SHA512

        c1422cc4933cd940607b769a229ed6348a03e15322092a9439610e58e95a044b7bb950b6422307d0cfd1b4210b0c0a758451c3d8d3eeb0ba87e8179b6e49e196

      • \??\c:\Users\Admin\AppData\Local\Temp\iux5hkbw\iux5hkbw.cmdline

        Filesize

        235B

        MD5

        fe975ef728a7e43e6f4888f8b5efbf6e

        SHA1

        ffa6f12f67b024dee205839a4d153fc04cf64277

        SHA256

        0cececbd8faa3ea14a20b0f3464034af3fffbfd2cf5180bebc768c00bde0c5bf

        SHA512

        86205bccbf8e5338feb76dbf84a67049a45da9d53718605ef16f7b4361fcf3b42200c8a11c9600c329abfee18d07e8e298be8685689c4d498e3dbfa026cf0cca

      • \??\c:\Windows\System32\CSCC8A0CD127904458C969B3432AF9A8A4.TMP

        Filesize

        1KB

        MD5

        1c519e4618f2b468d0f490d4a716da11

        SHA1

        1a693d0046e48fa813e4fa3bb94ccd20d43e3106

        SHA256

        4dbf16e3b3bb06c98eeaf27d0a25d9f34ee0ceac51e6365218ef7cd09edb3438

        SHA512

        99f293878a08b56db6ff2297f243f5f5b85864e6925a1d6af61a65369f7eb323ae1b75fe5f1465fac0b982ac9f49b9e0a295b5dac947da40f61991c4411233fd

      • memory/1172-69-0x000001F8F8C40000-0x000001F8F8C62000-memory.dmp

        Filesize

        136KB

      • memory/3692-30-0x00007FF8AC370000-0x00007FF8ACE31000-memory.dmp

        Filesize

        10.8MB

      • memory/3692-11-0x0000000001580000-0x000000000158E000-memory.dmp

        Filesize

        56KB

      • memory/3692-29-0x00007FF8AC370000-0x00007FF8ACE31000-memory.dmp

        Filesize

        10.8MB

      • memory/3692-0-0x00007FF8AC373000-0x00007FF8AC375000-memory.dmp

        Filesize

        8KB

      • memory/3692-34-0x00007FF8AC370000-0x00007FF8ACE31000-memory.dmp

        Filesize

        10.8MB

      • memory/3692-35-0x00007FF8AC370000-0x00007FF8ACE31000-memory.dmp

        Filesize

        10.8MB

      • memory/3692-16-0x0000000002D90000-0x0000000002D9C000-memory.dmp

        Filesize

        48KB

      • memory/3692-14-0x00007FF8AC370000-0x00007FF8ACE31000-memory.dmp

        Filesize

        10.8MB

      • memory/3692-13-0x0000000001590000-0x0000000001598000-memory.dmp

        Filesize

        32KB

      • memory/3692-17-0x00007FF8AC370000-0x00007FF8ACE31000-memory.dmp

        Filesize

        10.8MB

      • memory/3692-50-0x00007FF8AC370000-0x00007FF8ACE31000-memory.dmp

        Filesize

        10.8MB

      • memory/3692-9-0x0000000002D70000-0x0000000002D88000-memory.dmp

        Filesize

        96KB

      • memory/3692-7-0x000000001B7C0000-0x000000001B810000-memory.dmp

        Filesize

        320KB

      • memory/3692-6-0x0000000002D50000-0x0000000002D6C000-memory.dmp

        Filesize

        112KB

      • memory/3692-4-0x0000000001570000-0x000000000157E000-memory.dmp

        Filesize

        56KB

      • memory/3692-2-0x00007FF8AC370000-0x00007FF8ACE31000-memory.dmp

        Filesize

        10.8MB

      • memory/3692-1-0x0000000000BD0000-0x0000000000CA6000-memory.dmp

        Filesize

        856KB