Analysis

  • max time kernel
    121s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    23-01-2025 04:08

General

  • Target

    bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe

  • Size

    1.9MB

  • MD5

    c8ce6fc2028745f5eaf01a412d06acaa

  • SHA1

    4be17e69614ea35c4cd9939f84034e0e1e43a9a0

  • SHA256

    bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125

  • SHA512

    6d9f45afdab9e5a062f7c0e89372f4c2c6f897acb76a0523d6b1620b0ccf0e827c8b5643650ee290f14fb9015c084e3866f01b9a1978104718b261a7b1523f05

  • SSDEEP

    49152:bh8kL1nBcnwCcW2UUNUeZahEj6g3Kn7hRef6:bhMwFS+Ulz1nNRe

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.

  • 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 2 IoCs
  • 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\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe
    "C:\Users\Admin\AppData\Local\Temp\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.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:1880
    • 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\pnudtdsh\pnudtdsh.cmdline"
      2⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:2540
      • 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\RESEC14.tmp" "c:\Windows\System32\CSC9B1B65518F4D48AAA1858FCBBAA18A6A.TMP"
        3⤵
          PID:2620
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Cursors\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:800
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Windows Mail\wininit.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:760
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:820
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Microsoft.NET\RedistList\OSPPSVC.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:1636
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\All Users\Desktop\lsass.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:2512
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:932
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\D6eniQd0Sv.bat"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:684
        • C:\Windows\system32\chcp.com
          chcp 65001
          3⤵
            PID:876
          • C:\Windows\system32\PING.EXE
            ping -n 10 localhost
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:2188
          • C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe
            "C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            PID:2772
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125b" /sc MINUTE /mo 9 /tr "'C:\Windows\Cursors\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2644
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125" /sc ONLOGON /tr "'C:\Windows\Cursors\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2740
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125b" /sc MINUTE /mo 14 /tr "'C:\Windows\Cursors\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2712
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 9 /tr "'C:\Program Files\Windows Mail\wininit.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2248
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files\Windows Mail\wininit.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1008
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Mail\wininit.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:916
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125b" /sc MINUTE /mo 11 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2736
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125" /sc ONLOGON /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2272
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125b" /sc MINUTE /mo 6 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1996
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\OSPPSVC.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1728
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\OSPPSVC.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1484
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\OSPPSVC.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1524
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 8 /tr "'C:\Users\All Users\Desktop\lsass.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1992
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\All Users\Desktop\lsass.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2912
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 10 /tr "'C:\Users\All Users\Desktop\lsass.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:768
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125b" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\AppData\Local\Temp\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1768
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2392
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125b" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\AppData\Local\Temp\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:952

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\D6eniQd0Sv.bat

        Filesize

        245B

        MD5

        62235897a2550fe92dcf28f0b8935ce1

        SHA1

        183d05801c418dd4eeece36756e52656582e9bf7

        SHA256

        c0a623e530abaed39874deb7564c006bcca76d17f0afbb1f0aa080d4bb9150b9

        SHA512

        dffd78c4f1ed11283edb79951edc67816fb2cabea0896e9382cd96675e22d74c30f87e58b9fd8e266d382b5794ce880bd8ac1024c62359cffcbce4c4e96494ba

      • C:\Users\Admin\AppData\Local\Temp\RESEC14.tmp

        Filesize

        1KB

        MD5

        10bc9379da89ae759b4fc5bfcb332316

        SHA1

        fa38c697a795f3cae1fde5aec7d3495f8d3c0f55

        SHA256

        cc5f0212c4c501940e5c40d0664cd8e682bfd64ec530b3cdb10c9a5ee71dc245

        SHA512

        c2c45aa345b5115e01b0c741ca3d25e2fc805eaee7af546cdc6036a0ec5f66d74b2637e2cabb067a5b0039b9ea02c5765b4292de5a881c23a747860ed3d7fbf9

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

        Filesize

        7KB

        MD5

        2490a10f340b39ef435e5187b8ac1ca9

        SHA1

        95f27c574c6728c1332316b62c97348203a8e44e

        SHA256

        8f30abb432db1f4806bcc9dbddb1dc301e839ce9b8d35a45ae3c860dd06c62f8

        SHA512

        bf0656594b0065464ca1e93c60ca0601956359a7679f119f2bc9deb8cde826e6db1759e1e471cb53e47423c5c32c97c3d4cb2e3a9b9b187165a961c22f888e62

      • C:\Windows\Cursors\bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125.exe

        Filesize

        1.9MB

        MD5

        c8ce6fc2028745f5eaf01a412d06acaa

        SHA1

        4be17e69614ea35c4cd9939f84034e0e1e43a9a0

        SHA256

        bd068366ec33c420f480a1085cf661ae74ab13ac83bda6ccc9997d5495bed125

        SHA512

        6d9f45afdab9e5a062f7c0e89372f4c2c6f897acb76a0523d6b1620b0ccf0e827c8b5643650ee290f14fb9015c084e3866f01b9a1978104718b261a7b1523f05

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

        Filesize

        419B

        MD5

        5fdf9de984a08abe2edca75b8c15474a

        SHA1

        76cc1a90ce9cd0b31e25752d215142b40a56879c

        SHA256

        94df007963d2e28654bc6facf95b9e58b1cb18eb460cf0cb37f466324057bd31

        SHA512

        8728694f3956e6455f96e5edc621b8af520c5a7bcfee3d33ebda7da39d5f8c60a756a190c47434e7049a062ca5336bfd553ff96a31a3ac1bc510018434e38020

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

        Filesize

        235B

        MD5

        7093f38329e3dd28cc2ef14ab9b78f82

        SHA1

        879356c4c0e1d2c694c92b574e27f4e015cac8ba

        SHA256

        af4505626d5981f4efa27586a7e00adf8881832c28f4e3e57c1a69edc3d390f1

        SHA512

        c9452cc8d42b2ca2b9746563e8ab65586723ac5205361f64bdb70dc242a3297dca3931f168ca85d33a71677db911c3b5ff6e4353681970d63873bcea1d09eb60

      • \??\c:\Windows\System32\CSC9B1B65518F4D48AAA1858FCBBAA18A6A.TMP

        Filesize

        1KB

        MD5

        8c85ef91c6071d33745325a8fa351c3e

        SHA1

        e3311ceef28823eec99699cc35be27c94eca52d2

        SHA256

        8db3e3a5515da1933036688a9b1918cfc3339fc687008c5325461271904b2d41

        SHA512

        2bb89b07fe46b1c406ed6a560e88cb2b8402b1d61bb71e10887bad661751f64f1e5317fd6c1b301ea4766785b915da31b64e0475cfe36c1f950b32915b5dab7d

      • memory/760-81-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

        Filesize

        2.9MB

      • memory/820-82-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

        Filesize

        32KB

      • memory/1880-10-0x0000000000500000-0x0000000000518000-memory.dmp

        Filesize

        96KB

      • memory/1880-0-0x000007FEF55E3000-0x000007FEF55E4000-memory.dmp

        Filesize

        4KB

      • memory/1880-17-0x00000000004D0000-0x00000000004D8000-memory.dmp

        Filesize

        32KB

      • memory/1880-18-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

        Filesize

        9.9MB

      • memory/1880-19-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

        Filesize

        9.9MB

      • memory/1880-21-0x0000000000520000-0x000000000052C000-memory.dmp

        Filesize

        48KB

      • memory/1880-25-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

        Filesize

        9.9MB

      • memory/1880-12-0x00000000004A0000-0x00000000004AC000-memory.dmp

        Filesize

        48KB

      • memory/1880-34-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

        Filesize

        9.9MB

      • memory/1880-35-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

        Filesize

        9.9MB

      • memory/1880-13-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

        Filesize

        9.9MB

      • memory/1880-15-0x00000000004C0000-0x00000000004CE000-memory.dmp

        Filesize

        56KB

      • memory/1880-8-0x00000000004E0000-0x00000000004FC000-memory.dmp

        Filesize

        112KB

      • memory/1880-6-0x0000000000490000-0x000000000049E000-memory.dmp

        Filesize

        56KB

      • memory/1880-48-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

        Filesize

        9.9MB

      • memory/1880-4-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

        Filesize

        9.9MB

      • memory/1880-3-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

        Filesize

        9.9MB

      • memory/1880-80-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

        Filesize

        9.9MB

      • memory/1880-2-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

        Filesize

        9.9MB

      • memory/1880-1-0x0000000000950000-0x0000000000B40000-memory.dmp

        Filesize

        1.9MB

      • memory/2772-85-0x00000000000D0000-0x00000000002C0000-memory.dmp

        Filesize

        1.9MB