Analysis

  • max time kernel
    120s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    07-02-2025 08:50

General

  • Target

    9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe

  • Size

    1.9MB

  • MD5

    aae1c0e394855b9138d9d540a884eb1c

  • SHA1

    76443a092ea47adebb55e663c8299c495dd9e324

  • SHA256

    9f09328091800505339ee1a9f01b6a7646ed60d2ed21808b5e171175f1723b6b

  • SHA512

    a3bda818e3c84e16ae7788ecf4bce9712ab23a152ff164a5cb4e3723e8145ad912cbdc7c2902bb937812e9335733e8252b015eef92d4745b17403a632cbf7322

  • SSDEEP

    49152:HU7L1b7b3wCVJFpcHWhW8bLoym4ZEu9eBknBe6Y:HU7hbXAagWc8fo4ZESc6

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.

  • 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 5 IoCs
  • Drops file in Windows directory 2 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 system certificate store 2 TTPs 2 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 36 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\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe
    "C:\Users\Admin\AppData\Local\Temp\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2200
    • 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\yrvd4bhs\yrvd4bhs.cmdline"
      2⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:804
      • 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\RESB635.tmp" "c:\Windows\System32\CSCEDD39DE794E7468D9738BE595F697CD8.TMP"
        3⤵
          PID:1516
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Reference Assemblies\Microsoft\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:2080
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Installer\{AC76BA86-7AD7-1033-7B44-A90000000001}\lsass.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:1256
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\All Users\Documents\dllhost.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:1956
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\audiodg.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:1840
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\AcroForm\spoolsv.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:876
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:1940
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\cvPwbLiLgp.bat"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2324
        • C:\Windows\system32\chcp.com
          chcp 65001
          3⤵
            PID:1112
          • C:\Windows\system32\PING.EXE
            ping -n 10 localhost
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:1944
          • C:\Users\Admin\AppData\Local\Temp\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe
            "C:\Users\Admin\AppData\Local\Temp\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe"
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2536
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "9f09328091800505339ee1a9f01b6a7646ed60d2ed2189" /sc MINUTE /mo 9 /tr "'C:\Program Files\Reference Assemblies\Microsoft\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2768
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "9f09328091800505339ee1a9f01b6a7646ed60d2ed218" /sc ONLOGON /tr "'C:\Program Files\Reference Assemblies\Microsoft\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2800
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "9f09328091800505339ee1a9f01b6a7646ed60d2ed2189" /sc MINUTE /mo 12 /tr "'C:\Program Files\Reference Assemblies\Microsoft\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2884
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 7 /tr "'C:\Windows\Installer\{AC76BA86-7AD7-1033-7B44-A90000000001}\lsass.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1540
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\Installer\{AC76BA86-7AD7-1033-7B44-A90000000001}\lsass.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2984
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 10 /tr "'C:\Windows\Installer\{AC76BA86-7AD7-1033-7B44-A90000000001}\lsass.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:264
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Users\All Users\Documents\dllhost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2856
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\All Users\Documents\dllhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2512
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Users\All Users\Documents\dllhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2580
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\audiodg.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2428
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "audiodg" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\audiodg.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2276
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\audiodg.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1924
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\AcroForm\spoolsv.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1688
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\AcroForm\spoolsv.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1644
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\AcroForm\spoolsv.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:944
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "9f09328091800505339ee1a9f01b6a7646ed60d2ed2189" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\AppData\Local\Temp\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:808
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "9f09328091800505339ee1a9f01b6a7646ed60d2ed218" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2304
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "9f09328091800505339ee1a9f01b6a7646ed60d2ed2189" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\AppData\Local\Temp\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2336

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Program Files\Reference Assemblies\Microsoft\9f09328091800505339ee1a9f01b6a7646ed60d2ed218.exe

        Filesize

        1.9MB

        MD5

        aae1c0e394855b9138d9d540a884eb1c

        SHA1

        76443a092ea47adebb55e663c8299c495dd9e324

        SHA256

        9f09328091800505339ee1a9f01b6a7646ed60d2ed21808b5e171175f1723b6b

        SHA512

        a3bda818e3c84e16ae7788ecf4bce9712ab23a152ff164a5cb4e3723e8145ad912cbdc7c2902bb937812e9335733e8252b015eef92d4745b17403a632cbf7322

      • C:\Users\Admin\AppData\Local\Temp\RESB635.tmp

        Filesize

        1KB

        MD5

        766a9c12ca9bda6cfac28238d65d7477

        SHA1

        d45cbaaa33d7f9e8689cb3ea80f3144393e3c470

        SHA256

        58791e7d41d93bf63a4e6b6bb4f70a845b8b0d22b9af0511d6d5b8b549443c7d

        SHA512

        368d838ee503bf0a678fbea7171a19ffbd071fd98ccaa25f69884bc4c825d579f323401ae69dac184f95323b61515d0850a69926f5f0fd43c60982d7d14c0cb5

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

        Filesize

        211B

        MD5

        eff2500287063ca9773eae4f51d5ac3e

        SHA1

        d29244840e8bd5111b3bb0e9fbf3ebed301aa5b5

        SHA256

        34b2b6ba3ca147bcfac3b1ea980d7ed178af9c1ec488d462f9ad74392afde7a8

        SHA512

        34b4249f6327130dd4b8ad45e6de3ad95b0e8f57027d94a1f2988b0a4ca93b26c794c7ed34f2ef48166f774481d3199a89f730666b04e11fe79488114f6be7c6

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

        Filesize

        7KB

        MD5

        6e2268682f37a3fd4e525de727b538b4

        SHA1

        83f018ea30fa0ce7b2d1db54b7b415e486f28b32

        SHA256

        225e6acd45abff3f9e421c9f4652cae6a8426934f160b4689ce4d875787b740b

        SHA512

        0ea9070cf1bd9cbfbf3752b63b1e6a6412fe19d20b6246806e071dfd209f990335927965c9f504144bb85d27bc48c8644b27ee22ff2a5b26850666c276aa1ae3

      • \??\c:\Users\Admin\AppData\Local\Temp\yrvd4bhs\yrvd4bhs.0.cs

        Filesize

        429B

        MD5

        cc7150b7afa563738af137603a97d819

        SHA1

        28d5c48c38c6581ad0b4e4ee84b1abb61bd0c6dd

        SHA256

        a6da53887275834e899d9a46c819ed7ce700d965b5ed94241e88fa6673b8e826

        SHA512

        294a8f11b1392cf4edf406005062afff325112b90a67f81ccbfd83d3644a978b65f87370e5f32dfb081f918a4f04f3121f2082f9d19109ad42ffaf6222c1b39e

      • \??\c:\Users\Admin\AppData\Local\Temp\yrvd4bhs\yrvd4bhs.cmdline

        Filesize

        235B

        MD5

        9bba6711f642c04fcf30d314f81d1fed

        SHA1

        4923111fc9f38ddbd899e8df6a558baec208d32b

        SHA256

        35830803f3ac356f70d3852f32622b21343c333f5533ef474b0d37a5e55ddb3a

        SHA512

        8e2d84b1043282c303b57e8afc664aafeac2ed2b8b5b3744800019086f0ae7c0d8504dc286720e5e26651fb1e6a9c2df57c408512d756cf66c8dadf6f89c3fe1

      • \??\c:\Windows\System32\CSCEDD39DE794E7468D9738BE595F697CD8.TMP

        Filesize

        1KB

        MD5

        60a1ebb8f840aad127346a607d80fc19

        SHA1

        c8b7e9ad601ac19ab90b3e36f811960e8badf354

        SHA256

        9d6a9d38b7a86cc88e551a0c1172a3fb387b1a5f928ac13993ec3387d39cc243

        SHA512

        44830cefb264bac520174b4b884312dd0393be33a193d4f0fee3cc3c14deb86ca39e43ef281232f9169fd204d19b22e8a7aad72fa448ca52d5cbc3ee1dbb18a4

      • memory/1256-86-0x0000000001FD0000-0x0000000001FD8000-memory.dmp

        Filesize

        32KB

      • memory/1940-85-0x000000001B1C0000-0x000000001B4A2000-memory.dmp

        Filesize

        2.9MB

      • memory/2200-29-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-8-0x0000000000420000-0x000000000043C000-memory.dmp

        Filesize

        112KB

      • memory/2200-16-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-18-0x0000000000480000-0x000000000048C000-memory.dmp

        Filesize

        48KB

      • memory/2200-19-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-25-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-26-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-0-0x000007FEF6403000-0x000007FEF6404000-memory.dmp

        Filesize

        4KB

      • memory/2200-13-0x0000000000410000-0x000000000041C000-memory.dmp

        Filesize

        48KB

      • memory/2200-11-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-10-0x0000000000440000-0x0000000000458000-memory.dmp

        Filesize

        96KB

      • memory/2200-15-0x0000000000460000-0x0000000000468000-memory.dmp

        Filesize

        32KB

      • memory/2200-6-0x00000000003F0000-0x00000000003FE000-memory.dmp

        Filesize

        56KB

      • memory/2200-46-0x000007FEF6403000-0x000007FEF6404000-memory.dmp

        Filesize

        4KB

      • memory/2200-47-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-48-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-52-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-4-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-3-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-2-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-84-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2200-1-0x0000000000B20000-0x0000000000D04000-memory.dmp

        Filesize

        1.9MB

      • memory/2536-87-0x0000000000CB0000-0x0000000000E94000-memory.dmp

        Filesize

        1.9MB