Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-01-2025 03:34

General

  • Target

    c890d39d06a7d437d44a92b4a3f98e55c9cfb112b9ae8955d098dd5e1b93cd9c.exe

  • Size

    811KB

  • MD5

    2e4246ce82069e5e1f389e556634d683

  • SHA1

    2beb8cbe24d8775df79abaeb38fae72e96719d08

  • SHA256

    c890d39d06a7d437d44a92b4a3f98e55c9cfb112b9ae8955d098dd5e1b93cd9c

  • SHA512

    db52a5460d82bd1d8a250b2de68e3f0b55e7dbb044ccaf034484782cc2a7bc8e5c546954d3b6587b65be63181bf5f8c0603619d8438fb1c14744438fe78e66a8

  • SSDEEP

    12288:kKIIhtQY47i/eIFdRgbE1ooBQdpW3Ari4VVyZC0+1cXOoxPRq/6:kCaY4gFdRgbiooBQd3iE0n/xa6

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
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 7 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 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 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\c890d39d06a7d437d44a92b4a3f98e55c9cfb112b9ae8955d098dd5e1b93cd9c.exe
    "C:\Users\Admin\AppData\Local\Temp\c890d39d06a7d437d44a92b4a3f98e55c9cfb112b9ae8955d098dd5e1b93cd9c.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Drops file in Program Files directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5108
    • 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\oxtjqvig\oxtjqvig.cmdline"
      2⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:2172
      • 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\RES9059.tmp" "c:\Windows\System32\CSC35E9CDBFE4C048809EE9E96A683AF6DF.TMP"
        3⤵
          PID:4504
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\dllhost.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:5080
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\dllhost.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:1824
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\Videos\lsass.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:420
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\7-Zip\Lang\lsass.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:1368
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Microsoft Office\PackageManifests\lsass.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:4584
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\c890d39d06a7d437d44a92b4a3f98e55c9cfb112b9ae8955d098dd5e1b93cd9c.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:4608
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\rqio7V48KA.bat"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:5044
        • C:\Windows\system32\chcp.com
          chcp 65001
          3⤵
            PID:2944
          • C:\Windows\system32\w32tm.exe
            w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
            3⤵
              PID:4680
            • C:\Recovery\WindowsRE\dllhost.exe
              "C:\Recovery\WindowsRE\dllhost.exe"
              3⤵
              • Executes dropped EXE
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of AdjustPrivilegeToken
              PID:1188
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4172
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:752
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1728
        • 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'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1500
        • 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⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2364
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\dllhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4168
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\Videos\lsass.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4404
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\Admin\Videos\lsass.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1692
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 11 /tr "'C:\Users\Admin\Videos\lsass.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:5072
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 10 /tr "'C:\Program Files\7-Zip\Lang\lsass.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4688
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files\7-Zip\Lang\lsass.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2120
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 14 /tr "'C:\Program Files\7-Zip\Lang\lsass.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:408
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\Program Files\Microsoft Office\PackageManifests\lsass.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2832
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files\Microsoft Office\PackageManifests\lsass.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3784
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 12 /tr "'C:\Program Files\Microsoft Office\PackageManifests\lsass.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4512
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "c890d39d06a7d437d44a92b4a3f98e55c9cfb112b9ae8955d098dd5e1b93cd9cc" /sc MINUTE /mo 11 /tr "'C:\Users\Admin\AppData\Local\Temp\c890d39d06a7d437d44a92b4a3f98e55c9cfb112b9ae8955d098dd5e1b93cd9c.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4736
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "c890d39d06a7d437d44a92b4a3f98e55c9cfb112b9ae8955d098dd5e1b93cd9c" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\c890d39d06a7d437d44a92b4a3f98e55c9cfb112b9ae8955d098dd5e1b93cd9c.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1468
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "c890d39d06a7d437d44a92b4a3f98e55c9cfb112b9ae8955d098dd5e1b93cd9cc" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\AppData\Local\Temp\c890d39d06a7d437d44a92b4a3f98e55c9cfb112b9ae8955d098dd5e1b93cd9c.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:620

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Recovery\WindowsRE\dllhost.exe

          Filesize

          811KB

          MD5

          2e4246ce82069e5e1f389e556634d683

          SHA1

          2beb8cbe24d8775df79abaeb38fae72e96719d08

          SHA256

          c890d39d06a7d437d44a92b4a3f98e55c9cfb112b9ae8955d098dd5e1b93cd9c

          SHA512

          db52a5460d82bd1d8a250b2de68e3f0b55e7dbb044ccaf034484782cc2a7bc8e5c546954d3b6587b65be63181bf5f8c0603619d8438fb1c14744438fe78e66a8

        • 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

          77d622bb1a5b250869a3238b9bc1402b

          SHA1

          d47f4003c2554b9dfc4c16f22460b331886b191b

          SHA256

          f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

          SHA512

          d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

          Filesize

          944B

          MD5

          2e907f77659a6601fcc408274894da2e

          SHA1

          9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

          SHA256

          385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

          SHA512

          34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

        • 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\RES9059.tmp

          Filesize

          1KB

          MD5

          a76de36e6308a3bd26e30e20b04f3832

          SHA1

          a21ef07e67e52d739a4249bb83cf9117c2e733cf

          SHA256

          0ce97e703fb6415382e19390ff529bb0915deab331815df595103cb0fd15e94b

          SHA512

          ea7117fc8cd51430897154789a7ad81ade74a843d199ca20cbe68b8f3d149630e2169336776bad5b91510cccba5a734a302a3455f147f8942c8a55821016b26d

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n2pthwne.f12.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Users\Admin\AppData\Local\Temp\rqio7V48KA.bat

          Filesize

          209B

          MD5

          65d2535e9f881d84a1c239ea10c94780

          SHA1

          f7258dc62166160fa5ab0803a75730abf0766cb6

          SHA256

          058db591bd8875ffb69a019407dd0602f2cefaf4d64f609a06aa1f26a2586ec6

          SHA512

          a4216c068f5775dfd430e950b48fb788480f3a49795400acd934b7629b75d27daa014dc43324b7194a0bccb47ed04d9141e1a4092d1151f1ec222a43b4f67b31

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

          Filesize

          365B

          MD5

          c7f38b49626ca4f9902ad4c79923312d

          SHA1

          41d6b8ea2bf49ccb51b6896d193175f15f49a004

          SHA256

          0f35fe7e2a364783726d8b69fdda048cc644eac5a29fdd3800473dc0d1916fb5

          SHA512

          64d673e353bb4304a11899cd9c656d9729bfea93a9046f4d3814abd6c965956d3e3a9b645ac72623b83af052ac3022eee543351fc11401038dfe031c2da6c66d

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

          Filesize

          235B

          MD5

          afddd2812027f176b2d07928b74bc6cc

          SHA1

          5369284bac85bf2c32e37691b47ae7d5b57b54fa

          SHA256

          60818a9bca65c50658e878f9f3cd115c0aa149801f208c24d3b4d1ddb9a93b56

          SHA512

          7106859cd994612ccd91532a1ccfc12ba2a43bad56676d8fe6f540afd458bd8789d6a0ab5eccac72f618a2aab3278e007921ad57bbaf53beb1b8afc9d5346f57

        • \??\c:\Windows\System32\CSC35E9CDBFE4C048809EE9E96A683AF6DF.TMP

          Filesize

          1KB

          MD5

          1c519e4618f2b468d0f490d4a716da11

          SHA1

          1a693d0046e48fa813e4fa3bb94ccd20d43e3106

          SHA256

          4dbf16e3b3bb06c98eeaf27d0a25d9f34ee0ceac51e6365218ef7cd09edb3438

          SHA512

          99f293878a08b56db6ff2297f243f5f5b85864e6925a1d6af61a65369f7eb323ae1b75fe5f1465fac0b982ac9f49b9e0a295b5dac947da40f61991c4411233fd

        • memory/420-53-0x000002AFF6340000-0x000002AFF6362000-memory.dmp

          Filesize

          136KB

        • memory/1188-123-0x000000001BDC0000-0x000000001BEC2000-memory.dmp

          Filesize

          1.0MB

        • memory/5108-12-0x0000000000900000-0x000000000090E000-memory.dmp

          Filesize

          56KB

        • memory/5108-52-0x00007FFD6D400000-0x00007FFD6DEC1000-memory.dmp

          Filesize

          10.8MB

        • memory/5108-28-0x00007FFD6D400000-0x00007FFD6DEC1000-memory.dmp

          Filesize

          10.8MB

        • memory/5108-27-0x00007FFD6D400000-0x00007FFD6DEC1000-memory.dmp

          Filesize

          10.8MB

        • memory/5108-15-0x00007FFD6D400000-0x00007FFD6DEC1000-memory.dmp

          Filesize

          10.8MB

        • memory/5108-14-0x0000000000910000-0x000000000091C000-memory.dmp

          Filesize

          48KB

        • memory/5108-6-0x0000000000940000-0x000000000095C000-memory.dmp

          Filesize

          112KB

        • memory/5108-32-0x00007FFD6D400000-0x00007FFD6DEC1000-memory.dmp

          Filesize

          10.8MB

        • memory/5108-0-0x00007FFD6D403000-0x00007FFD6D405000-memory.dmp

          Filesize

          8KB

        • memory/5108-7-0x00007FFD6D400000-0x00007FFD6DEC1000-memory.dmp

          Filesize

          10.8MB

        • memory/5108-8-0x00000000022D0000-0x0000000002320000-memory.dmp

          Filesize

          320KB

        • memory/5108-10-0x0000000002220000-0x0000000002238000-memory.dmp

          Filesize

          96KB

        • memory/5108-4-0x00000000008F0000-0x00000000008FE000-memory.dmp

          Filesize

          56KB

        • memory/5108-2-0x00007FFD6D400000-0x00007FFD6DEC1000-memory.dmp

          Filesize

          10.8MB

        • memory/5108-1-0x0000000000060000-0x0000000000132000-memory.dmp

          Filesize

          840KB