Analysis

  • max time kernel
    94s
  • 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
    25-01-2025 21:17

General

  • Target

    2c359780ff1c635fd866c9f81e53ea9a95c0af2c9b303aec259675882dd13253.exe

  • Size

    1.9MB

  • MD5

    51ee1c43b8c4c83a1ee89f486a002e8a

  • SHA1

    ac3559b85e9f8328fc661c4f7dc17d464aa461fa

  • SHA256

    2c359780ff1c635fd866c9f81e53ea9a95c0af2c9b303aec259675882dd13253

  • SHA512

    3191012d5078beb815ff733c3981545858a30e5051ffbbb7b4bb1dff5bab82004809a0d407af0d8312b241c05738591d7a83ce2e01e0c9b2e8f9d325ca9649d6

  • SSDEEP

    49152:SIsY+oZb+wZGTt6IDmYYg+tfxXi1Mq39V:SIg6IDatJXbM9V

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.

  • 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 4 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 4 IoCs
  • Drops file in Windows directory 5 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 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\2c359780ff1c635fd866c9f81e53ea9a95c0af2c9b303aec259675882dd13253.exe
    "C:\Users\Admin\AppData\Local\Temp\2c359780ff1c635fd866c9f81e53ea9a95c0af2c9b303aec259675882dd13253.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:1660
    • 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\c55mbq3e\c55mbq3e.cmdline"
      2⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:3388
      • 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\RESA20C.tmp" "c:\Windows\System32\CSC547D635BD8884698BA218E1EE55CDF4.TMP"
        3⤵
          PID:2136
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\ServiceProfiles\dllhost.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:2344
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sppsvc.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:3212
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\fontdrvhost.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:772
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\WindowsPowerShell\Modules\SppExtComObj.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:4504
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\PrintDialog\RuntimeBroker.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:2776
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\2c359780ff1c635fd866c9f81e53ea9a95c0af2c9b303aec259675882dd13253.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:4632
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\83RukHUSkW.bat"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3732
        • C:\Windows\system32\chcp.com
          chcp 65001
          3⤵
            PID:1088
          • C:\Windows\system32\w32tm.exe
            w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
            3⤵
              PID:1752
            • C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sppsvc.exe
              "C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sppsvc.exe"
              3⤵
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:404
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Windows\ServiceProfiles\dllhost.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3280
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\ServiceProfiles\dllhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2284
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Windows\ServiceProfiles\dllhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1508
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sppsvc.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3932
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sppsvc.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4616
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sppsvc.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3088
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\fontdrvhost.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3060
        • 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
          • Scheduled Task/Job: Scheduled Task
          PID:3296
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\fontdrvhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1896
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\WindowsPowerShell\Modules\SppExtComObj.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3492
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Program Files (x86)\WindowsPowerShell\Modules\SppExtComObj.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4744
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\WindowsPowerShell\Modules\SppExtComObj.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:540
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 5 /tr "'C:\Windows\PrintDialog\RuntimeBroker.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3748
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\PrintDialog\RuntimeBroker.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1984
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Windows\PrintDialog\RuntimeBroker.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:872
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "2c359780ff1c635fd866c9f81e53ea9a95c0af2c9b303aec259675882dd132532" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\AppData\Local\Temp\2c359780ff1c635fd866c9f81e53ea9a95c0af2c9b303aec259675882dd13253.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4992
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "2c359780ff1c635fd866c9f81e53ea9a95c0af2c9b303aec259675882dd13253" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\2c359780ff1c635fd866c9f81e53ea9a95c0af2c9b303aec259675882dd13253.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4464
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "2c359780ff1c635fd866c9f81e53ea9a95c0af2c9b303aec259675882dd132532" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\AppData\Local\Temp\2c359780ff1c635fd866c9f81e53ea9a95c0af2c9b303aec259675882dd13253.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2420

        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

          2e907f77659a6601fcc408274894da2e

          SHA1

          9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

          SHA256

          385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

          SHA512

          34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

          Filesize

          944B

          MD5

          62623d22bd9e037191765d5083ce16a3

          SHA1

          4a07da6872672f715a4780513d95ed8ddeefd259

          SHA256

          95d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010

          SHA512

          9a448b7a0d867466c2ea04ab84d2a9485d5fd20ab53b2b854f491831ee3f1d781b94d2635f7b0b35cb9f2d373cd52c67570879a56a42ed66bc9db06962ed4992

        • C:\Users\Admin\AppData\Local\Temp\83RukHUSkW.bat

          Filesize

          250B

          MD5

          41c4347566cbb5f86a60daf1d0faf32f

          SHA1

          8a46f201a42621822456faf9ecfae3c73066adea

          SHA256

          2cd5cf8e939cc124e0e5ed712ecd9ced59f161c7ab9057483ac187ca40ca9427

          SHA512

          47b1a80aef384e64d5369493b2a0a72cad62da70fbc344907f5b75d659c2690a4affa4bf4f798f92cede85849ffe92aeda83c3050d1a29c43312ba0e90ba40c4

        • C:\Users\Admin\AppData\Local\Temp\RESA20C.tmp

          Filesize

          1KB

          MD5

          4a6fe3001047db20b995172a32d54b4e

          SHA1

          09ff97bc163ab97b9bcab06e10d8d722623f2db2

          SHA256

          89b41535f06fd07ca24c56205e87a84790daa249d482260271d905a979f9ad13

          SHA512

          c6c64df570fadbf53e0a54927132033f55376c891f65f94dfcdef567e677214ff948cbad38a6a44f678ffd8d631e645eb38344aaf467e2efc5893fcd12712793

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ku3kcjbw.ite.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Windows\ServiceProfiles\dllhost.exe

          Filesize

          1.9MB

          MD5

          51ee1c43b8c4c83a1ee89f486a002e8a

          SHA1

          ac3559b85e9f8328fc661c4f7dc17d464aa461fa

          SHA256

          2c359780ff1c635fd866c9f81e53ea9a95c0af2c9b303aec259675882dd13253

          SHA512

          3191012d5078beb815ff733c3981545858a30e5051ffbbb7b4bb1dff5bab82004809a0d407af0d8312b241c05738591d7a83ce2e01e0c9b2e8f9d325ca9649d6

        • \??\c:\Users\Admin\AppData\Local\Temp\c55mbq3e\c55mbq3e.0.cs

          Filesize

          370B

          MD5

          9314b664b68114fa347d91dff4d66d11

          SHA1

          4cbd9987107bebcaf96bc38ac8c56fe65829650f

          SHA256

          75b29f56abb67f67c06e35843ce96222fa59489648dba06aa28e7b296e1e0390

          SHA512

          5ec2451846e17f00b3d3a074994e666b4f460601af0b070f5c029d81fcb85252e025f93ff21a23cebe764dbb11026a37706d32041daade7199d9cea39f2e1577

        • \??\c:\Users\Admin\AppData\Local\Temp\c55mbq3e\c55mbq3e.cmdline

          Filesize

          235B

          MD5

          e3a6a0aa013f8a16d5451576c6a4825b

          SHA1

          c80272595f79c5ab63d7b0124886f21b99871084

          SHA256

          24c96e97f943328b889ff74ee90a822dde2747c90f36be9d65b210567d962a7b

          SHA512

          a8f8ca17292eae4d05bebb3d240fa4a4ef98eca8e62825211fba9f76d07669a5a6cfe9b2c69cb4a85f67b864c4d2454ec21a20afc720ed7bad7c413417323540

        • \??\c:\Windows\System32\CSC547D635BD8884698BA218E1EE55CDF4.TMP

          Filesize

          1KB

          MD5

          d544bac668d308d2aba58ded2c13d82d

          SHA1

          e5dd50ef24d5c16629092f9290661a92387773b3

          SHA256

          84b05d56c45fd0382410fcd59e16aeef467ed0a455595dda88386dd5c87d7a02

          SHA512

          0826de2bc95d93dde2c540d2d768a0188481ee88f1da79f9c7d70d7ccd3c8715b8f1d62053f84d14f19e4d2b0a13e67084d970a158464e6223e340eb0733e1b0

        • memory/1660-10-0x000000001AFD0000-0x000000001AFEC000-memory.dmp

          Filesize

          112KB

        • memory/1660-6-0x0000000000C80000-0x0000000000C8E000-memory.dmp

          Filesize

          56KB

        • memory/1660-20-0x0000000000CC0000-0x0000000000CCC000-memory.dmp

          Filesize

          48KB

        • memory/1660-17-0x0000000000CB0000-0x0000000000CB8000-memory.dmp

          Filesize

          32KB

        • memory/1660-22-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

          Filesize

          10.8MB

        • memory/1660-11-0x000000001B080000-0x000000001B0D0000-memory.dmp

          Filesize

          320KB

        • memory/1660-15-0x0000000000CA0000-0x0000000000CAE000-memory.dmp

          Filesize

          56KB

        • memory/1660-33-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

          Filesize

          10.8MB

        • memory/1660-13-0x000000001AFF0000-0x000000001B008000-memory.dmp

          Filesize

          96KB

        • memory/1660-0-0x00007FF8CFC13000-0x00007FF8CFC15000-memory.dmp

          Filesize

          8KB

        • memory/1660-8-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

          Filesize

          10.8MB

        • memory/1660-18-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

          Filesize

          10.8MB

        • memory/1660-46-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

          Filesize

          10.8MB

        • memory/1660-47-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

          Filesize

          10.8MB

        • memory/1660-48-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

          Filesize

          10.8MB

        • memory/1660-7-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

          Filesize

          10.8MB

        • memory/1660-1-0x00000000002B0000-0x0000000000498000-memory.dmp

          Filesize

          1.9MB

        • memory/1660-73-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

          Filesize

          10.8MB

        • memory/1660-4-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

          Filesize

          10.8MB

        • memory/1660-3-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

          Filesize

          10.8MB

        • memory/1660-2-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

          Filesize

          10.8MB

        • memory/3212-62-0x0000017FDC880000-0x0000017FDC8A2000-memory.dmp

          Filesize

          136KB