Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    19-11-2024 05:13

General

  • Target

    a7f4c48301ad6b01c8777427eaceb965a9e0c14d493f44d1dea4f8d498123469.exe

  • Size

    1.9MB

  • MD5

    2d756772bc00e5778d794c107358ddf7

  • SHA1

    77229fc9ceeb137c6644a4fa3085aecabaf94ec3

  • SHA256

    a7f4c48301ad6b01c8777427eaceb965a9e0c14d493f44d1dea4f8d498123469

  • SHA512

    31fae1a50618ed221cef3bfc72a017e8e925c3aa2bac727040ee655d9dff567813e91d76fecda0478653d50b8061481447ded77939b94e1ec823c3419b68c783

  • SSDEEP

    24576:S1cKuEoW9iN0TvOJcaCXMgg2Suqp6Nheem6Vuuean7WiOLYGhYJG9oQpyhctpnWq:wb24KbkglgVMm9OAG9oMgctpnW5yI4

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 5 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies system certificate store 2 TTPs 2 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 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\a7f4c48301ad6b01c8777427eaceb965a9e0c14d493f44d1dea4f8d498123469.exe
    "C:\Users\Admin\AppData\Local\Temp\a7f4c48301ad6b01c8777427eaceb965a9e0c14d493f44d1dea4f8d498123469.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:2220
    • 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\epjwd2ux\epjwd2ux.cmdline"
      2⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:2268
      • 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\RES1F72.tmp" "c:\Windows\System32\CSCEDB6EE0536304180AE68289E59D557B.TMP"
        3⤵
          PID:1032
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Public\Videos\Sample Videos\taskhost.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:528
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Mozilla Firefox\uninstall\sppsvc.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:2244
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Help\mui\0C0A\lsm.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:1688
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\wininit.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:808
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Microsoft Games\Minesweeper\it-IT\sppsvc.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:2612
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\a7f4c48301ad6b01c8777427eaceb965a9e0c14d493f44d1dea4f8d498123469.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of AdjustPrivilegeToken
        PID:944
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\VKIqlhbWOK.bat"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:764
        • C:\Windows\system32\chcp.com
          chcp 65001
          3⤵
            PID:1276
          • C:\Windows\system32\w32tm.exe
            w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
            3⤵
              PID:2340
            • C:\Windows\Help\mui\0C0A\lsm.exe
              "C:\Windows\Help\mui\0C0A\lsm.exe"
              3⤵
              • Executes dropped EXE
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of AdjustPrivilegeToken
              PID:3008
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 7 /tr "'C:\Users\Public\Videos\Sample Videos\taskhost.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2716
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Users\Public\Videos\Sample Videos\taskhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2760
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 12 /tr "'C:\Users\Public\Videos\Sample Videos\taskhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2572
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Program Files\Mozilla Firefox\uninstall\sppsvc.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1740
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files\Mozilla Firefox\uninstall\sppsvc.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:828
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 7 /tr "'C:\Program Files\Mozilla Firefox\uninstall\sppsvc.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2532
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsml" /sc MINUTE /mo 8 /tr "'C:\Windows\Help\mui\0C0A\lsm.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2924
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\Help\mui\0C0A\lsm.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3060
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsml" /sc MINUTE /mo 12 /tr "'C:\Windows\Help\mui\0C0A\lsm.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1704
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 13 /tr "'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\wininit.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:972
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\wininit.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1952
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 10 /tr "'C:\Recovery\31f19e42-8726-11ef-be9a-dab21757c799\wininit.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2504
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 11 /tr "'C:\Program Files\Microsoft Games\Minesweeper\it-IT\sppsvc.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1028
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files\Microsoft Games\Minesweeper\it-IT\sppsvc.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1240
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 10 /tr "'C:\Program Files\Microsoft Games\Minesweeper\it-IT\sppsvc.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2124
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "a7f4c48301ad6b01c8777427eaceb965a9e0c14d493f44d1dea4f8d498123469a" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\AppData\Local\Temp\a7f4c48301ad6b01c8777427eaceb965a9e0c14d493f44d1dea4f8d498123469.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2272
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "a7f4c48301ad6b01c8777427eaceb965a9e0c14d493f44d1dea4f8d498123469" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\a7f4c48301ad6b01c8777427eaceb965a9e0c14d493f44d1dea4f8d498123469.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2412
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "a7f4c48301ad6b01c8777427eaceb965a9e0c14d493f44d1dea4f8d498123469a" /sc MINUTE /mo 7 /tr "'C:\Users\Admin\AppData\Local\Temp\a7f4c48301ad6b01c8777427eaceb965a9e0c14d493f44d1dea4f8d498123469.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2520

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\RES1F72.tmp

          Filesize

          1KB

          MD5

          ecc9ef271cf23844f4a3e8a77f9c3cc2

          SHA1

          88adb189ed1ead0a22ba456cf5c4a7b56172c87a

          SHA256

          5c08fd0f71d541b0a789989d146db1aa9b7432551eac11e2ff619619818aa27f

          SHA512

          2a3247f6b70538e2633854c5812f10f09f7973c88f29eb8ace06fd08ddf6ef5aaf430ae2a6532c49975abdaefc78b87f93b931cca851fe0e9c3fa580f8acaeb8

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

          Filesize

          208B

          MD5

          8b40407f7579d9cf71018ab9fd449a2d

          SHA1

          8210ab7863828b30f1a5f5179b5b640d20c951fc

          SHA256

          675074d0500a6f99e1aab1e5a92f1db1af360e59e4e89a58bb77bcd9ca6a978a

          SHA512

          0c17dad69d4fabf2e3c86ba25344a24dc491a252bfc81910f6643d1c2360230f01d5af30ca8390882d9e262a40dd1ce7f051387155bbf8cd7f9cc1370f8fb2f7

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

          Filesize

          7KB

          MD5

          b123895e65410e8d5835365e6b883410

          SHA1

          5d2bb7033ce9f7fefb43a385d016cc9d703cde1e

          SHA256

          5550b38bfa514f37cf1aa0732800d4a234dc3eef00b964bd48c02b0837ffa9ad

          SHA512

          d9ee8cb5c5518c18c4fa84562f959b72584ac301a6bb81fb828c57dc3212f9f3d4d9c97bc426685c69f854984b37b4c2445302a4087789a71797d256e6722008

        • C:\Users\Public\Videos\Sample Videos\taskhost.exe

          Filesize

          1.9MB

          MD5

          2d756772bc00e5778d794c107358ddf7

          SHA1

          77229fc9ceeb137c6644a4fa3085aecabaf94ec3

          SHA256

          a7f4c48301ad6b01c8777427eaceb965a9e0c14d493f44d1dea4f8d498123469

          SHA512

          31fae1a50618ed221cef3bfc72a017e8e925c3aa2bac727040ee655d9dff567813e91d76fecda0478653d50b8061481447ded77939b94e1ec823c3419b68c783

        • \??\c:\Users\Admin\AppData\Local\Temp\epjwd2ux\epjwd2ux.0.cs

          Filesize

          381B

          MD5

          b57a909fb7dda78454056bcbb8b9fae6

          SHA1

          b29e7bef9aaa0e9b5b1cfd0c21b55d4346ec655e

          SHA256

          2f8dde177b97034c2eb89b0e04032595744509dcc0b9f7dc0d0c5fac7ca444e1

          SHA512

          1c846a23b7163bbacf4d67da461575a147d3ba5f5640d4d9eeca747504150bada67a7c15e154cacc4d6235ca0042ed1cbb85c97a1c42a667fe9db58029d1e964

        • \??\c:\Users\Admin\AppData\Local\Temp\epjwd2ux\epjwd2ux.cmdline

          Filesize

          235B

          MD5

          1b18b073575546656784be62eef5b121

          SHA1

          24b274b5557752dcf6d01c1faafe97f47db73d0e

          SHA256

          7127bfd5d7e361e42dff48aa3eb440a01215d4fda80bb595f90e6bb871d4c174

          SHA512

          8562cd7770022b579623c119e5542da1edef0a454876b8005ea1f52182f37a130ef04e1e42b3c9a59aac070b196c1c383ed98ef9755383905e8c9bd6b4e9b6a5

        • \??\c:\Windows\System32\CSCEDB6EE0536304180AE68289E59D557B.TMP

          Filesize

          1KB

          MD5

          60a1ebb8f840aad127346a607d80fc19

          SHA1

          c8b7e9ad601ac19ab90b3e36f811960e8badf354

          SHA256

          9d6a9d38b7a86cc88e551a0c1172a3fb387b1a5f928ac13993ec3387d39cc243

          SHA512

          44830cefb264bac520174b4b884312dd0393be33a193d4f0fee3cc3c14deb86ca39e43ef281232f9169fd204d19b22e8a7aad72fa448ca52d5cbc3ee1dbb18a4

        • memory/944-81-0x000000001B210000-0x000000001B4F2000-memory.dmp

          Filesize

          2.9MB

        • memory/944-82-0x0000000002280000-0x0000000002288000-memory.dmp

          Filesize

          32KB

        • memory/2220-24-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-6-0x0000000000370000-0x000000000037E000-memory.dmp

          Filesize

          56KB

        • memory/2220-16-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-15-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-17-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-18-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-19-0x000007FEF5F03000-0x000007FEF5F04000-memory.dmp

          Filesize

          4KB

        • memory/2220-21-0x0000000000390000-0x0000000000398000-memory.dmp

          Filesize

          32KB

        • memory/2220-23-0x0000000000380000-0x000000000038C000-memory.dmp

          Filesize

          48KB

        • memory/2220-0-0x000007FEF5F03000-0x000007FEF5F04000-memory.dmp

          Filesize

          4KB

        • memory/2220-26-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-10-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-9-0x00000000003A0000-0x00000000003BC000-memory.dmp

          Filesize

          112KB

        • memory/2220-12-0x00000000003C0000-0x00000000003D8000-memory.dmp

          Filesize

          96KB

        • memory/2220-7-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-14-0x00000000003E0000-0x00000000003F2000-memory.dmp

          Filesize

          72KB

        • memory/2220-49-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-50-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-51-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-52-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-54-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-53-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-4-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-3-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-2-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-1-0x00000000008A0000-0x0000000000A8E000-memory.dmp

          Filesize

          1.9MB

        • memory/2220-88-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2220-89-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

          Filesize

          9.9MB

        • memory/3008-92-0x0000000000D10000-0x0000000000EFE000-memory.dmp

          Filesize

          1.9MB