Analysis

  • max time kernel
    118s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    26/01/2024, 10:51

General

  • Target
    a45e2d72a3718dd27e9b0703307a2e4a.exe
  • Size 2.0MB
  • Sample240126-mxtcwsdcar
  • SHA256 0032705a736c09ccb7d06c156ceceee2c5915f486a32df2cd0d00d8393c9e0f2
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Modifies WinLogon for persistence 2 TTPs 9 IoCs
  • Process spawned unexpected child process 27 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • DCRat payload 5 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 18 IoCs
  • Drops file in Program Files directory 16 IoCs
  • Drops file in Windows directory 8 IoCs
  • Creates scheduled task(s) 1 TTPs 27 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of WriteProcessMemory 33 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\a45e2d72a3718dd27e9b0703307a2e4a.exe
    "C:\Users\Admin\AppData\Local\Temp\a45e2d72a3718dd27e9b0703307a2e4a.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2264
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\a45e2d72a3718dd27e9b0703307a2e4a.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2896
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\MSBuild\a45e2d72a3718dd27e9b0703307a2e4a.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1856
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\ShellNew\dllhost.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2252
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\463aa442-9b96-11ee-b087-e6b52eba4e86\System.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1636
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Windows Portable Devices\dwm.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1912
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Windows Mail\it-IT\a45e2d72a3718dd27e9b0703307a2e4a.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1480
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Uninstall Information\lsm.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:320
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\463aa442-9b96-11ee-b087-e6b52eba4e86\dwm.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3052
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\de-DE\dwm.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3056
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\a45e2d72a3718dd27e9b0703307a2e4a.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1796
    • C:\Recovery\463aa442-9b96-11ee-b087-e6b52eba4e86\System.exe
      "C:\Recovery\463aa442-9b96-11ee-b087-e6b52eba4e86\System.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:568
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Windows\ShellNew\dllhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2556
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "a45e2d72a3718dd27e9b0703307a2e4aa" /sc MINUTE /mo 11 /tr "'C:\Program Files\MSBuild\a45e2d72a3718dd27e9b0703307a2e4a.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2440
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "a45e2d72a3718dd27e9b0703307a2e4a" /sc ONLOGON /tr "'C:\Program Files\MSBuild\a45e2d72a3718dd27e9b0703307a2e4a.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2704
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "a45e2d72a3718dd27e9b0703307a2e4aa" /sc MINUTE /mo 14 /tr "'C:\Program Files\MSBuild\a45e2d72a3718dd27e9b0703307a2e4a.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2560
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\ShellNew\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2608
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Windows\ShellNew\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2064
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\Recovery\463aa442-9b96-11ee-b087-e6b52eba4e86\System.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3004
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\463aa442-9b96-11ee-b087-e6b52eba4e86\System.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1720
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Recovery\463aa442-9b96-11ee-b087-e6b52eba4e86\System.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2596
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Portable Devices\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1472
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2636
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "a45e2d72a3718dd27e9b0703307a2e4aa" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Mail\it-IT\a45e2d72a3718dd27e9b0703307a2e4a.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2460
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Portable Devices\dwm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2848
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "a45e2d72a3718dd27e9b0703307a2e4a" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Mail\it-IT\a45e2d72a3718dd27e9b0703307a2e4a.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2464
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "a45e2d72a3718dd27e9b0703307a2e4aa" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Mail\it-IT\a45e2d72a3718dd27e9b0703307a2e4a.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1928
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "a45e2d72a3718dd27e9b0703307a2e4a" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\a45e2d72a3718dd27e9b0703307a2e4a.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1596
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "a45e2d72a3718dd27e9b0703307a2e4aa" /sc MINUTE /mo 11 /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\a45e2d72a3718dd27e9b0703307a2e4a.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1648
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "a45e2d72a3718dd27e9b0703307a2e4aa" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\a45e2d72a3718dd27e9b0703307a2e4a.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1556
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Uninstall Information\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:268
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Recovery\463aa442-9b96-11ee-b087-e6b52eba4e86\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1240
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 7 /tr "'C:\Windows\de-DE\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3012
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\de-DE\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3032
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 12 /tr "'C:\Windows\de-DE\dwm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2056
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 13 /tr "'C:\Recovery\463aa442-9b96-11ee-b087-e6b52eba4e86\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1052
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 7 /tr "'C:\Recovery\463aa442-9b96-11ee-b087-e6b52eba4e86\dwm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2984
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files (x86)\Uninstall Information\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:592
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Uninstall Information\lsm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2116

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        a45e2d72a3718dd27e9b0703307a2e4a.exe

        • Path C:\Program Files (x86)\Windows Mail\it-IT\a45e2d72a3718dd27e9b0703307a2e4a.exe
        • Size 903KB
        • SHA256 db2088178208c684f1ab9ebe1298a4faa22b222212f320da65d8e140018c45cb
        • MD5 SHA1 SHA512 SSDEEP

        System.exe

        • Path C:\Recovery\463aa442-9b96-11ee-b087-e6b52eba4e86\System.exe
        • Size 327KB
        • SHA256 9a3536cc5f8391935afa6f6117a07880ddf54ca49b63e42c3b4f9b3e47a87d3a
        • MD5 SHA1 SHA512 SSDEEP

        System.exe

        • Path C:\Recovery\463aa442-9b96-11ee-b087-e6b52eba4e86\System.exe
        • Size 190KB
        • SHA256 a6cf36f5b6450efc3868fd7dcb55f5256f3dfa6cf7db235fce257a4bd5460375
        • MD5 SHA1 SHA512 SSDEEP

        590aee7bdd69b59b.customDestinations-ms

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
        • Size 7KB
        • SHA256 05221218da2a8628bf82786c5122f4fce50f10c084e07ee0c596683017d0c513
        • MD5 SHA1 SHA512 SSDEEP

        memory/320-192-0x0000000002C30000-0x0000000002CB0000-memory.dmp

        memory/320-195-0x000007FEEC8D0000-0x000007FEED26D000-memory.dmp

        memory/568-141-0x0000000000150000-0x000000000035A000-memory.dmp

        memory/568-174-0x000007FEF56C0000-0x000007FEF60AC000-memory.dmp

        memory/1480-187-0x0000000002D50000-0x0000000002DD0000-memory.dmp

        memory/1480-190-0x0000000002D50000-0x0000000002DD0000-memory.dmp

        memory/1480-182-0x0000000002D50000-0x0000000002DD0000-memory.dmp

        memory/1480-185-0x000007FEEC8D0000-0x000007FEED26D000-memory.dmp

        memory/1636-175-0x000007FEEC8D0000-0x000007FEED26D000-memory.dmp

        memory/1636-196-0x000007FEEC8D0000-0x000007FEED26D000-memory.dmp

        memory/1636-176-0x0000000002C50000-0x0000000002CD0000-memory.dmp

        memory/1636-177-0x0000000002C50000-0x0000000002CD0000-memory.dmp

        memory/1796-194-0x0000000002D3B000-0x0000000002DA2000-memory.dmp

        memory/1856-197-0x0000000002DCB000-0x0000000002E32000-memory.dmp

        memory/1912-188-0x000007FEEC8D0000-0x000007FEED26D000-memory.dmp

        memory/1912-191-0x0000000002404000-0x0000000002407000-memory.dmp

        memory/1912-184-0x000000000240B000-0x0000000002472000-memory.dmp

        memory/2252-169-0x000007FEEC8D0000-0x000007FEED26D000-memory.dmp

        memory/2252-168-0x0000000002C8B000-0x0000000002CF2000-memory.dmp

        memory/2252-171-0x0000000002C84000-0x0000000002C87000-memory.dmp

        memory/2252-167-0x0000000002C80000-0x0000000002D00000-memory.dmp

        memory/2264-16-0x000000001AF90000-0x000000001B010000-memory.dmp

        memory/2264-10-0x0000000000460000-0x000000000046C000-memory.dmp

        memory/2264-44-0x000000001AF90000-0x000000001B010000-memory.dmp

        memory/2264-1-0x000007FEF56C0000-0x000007FEF60AC000-memory.dmp

        memory/2264-148-0x000007FEF56C0000-0x000007FEF60AC000-memory.dmp

        memory/2264-20-0x00000000024B0000-0x00000000024BC000-memory.dmp

        memory/2264-21-0x0000000002500000-0x000000000250A000-memory.dmp

        memory/2264-2-0x000000001AF90000-0x000000001B010000-memory.dmp

        memory/2264-3-0x0000000000140000-0x000000000014E000-memory.dmp

        memory/2264-4-0x0000000000350000-0x000000000035E000-memory.dmp

        memory/2264-6-0x0000000000380000-0x000000000039C000-memory.dmp

        memory/2264-22-0x0000000002510000-0x000000000251C000-memory.dmp

        memory/2264-9-0x00000000003D0000-0x00000000003E0000-memory.dmp

        memory/2264-5-0x0000000000360000-0x0000000000368000-memory.dmp

        memory/2264-11-0x00000000004F0000-0x0000000000502000-memory.dmp

        memory/2264-15-0x0000000000B60000-0x0000000000B6C000-memory.dmp

        memory/2264-0-0x0000000000B70000-0x0000000000D7A000-memory.dmp

        memory/2264-17-0x0000000002260000-0x000000000226E000-memory.dmp

        memory/2264-8-0x00000000003B0000-0x00000000003C6000-memory.dmp

        memory/2264-7-0x00000000003A0000-0x00000000003B0000-memory.dmp

        memory/2264-19-0x00000000024A0000-0x00000000024AE000-memory.dmp

        memory/2264-12-0x0000000000520000-0x000000000052C000-memory.dmp

        memory/2264-18-0x0000000002480000-0x0000000002488000-memory.dmp

        memory/2264-13-0x0000000000B50000-0x0000000000B5C000-memory.dmp

        memory/2264-14-0x0000000002490000-0x0000000002498000-memory.dmp

        memory/2896-165-0x000007FEEC8D0000-0x000007FEED26D000-memory.dmp

        memory/2896-166-0x0000000002B90000-0x0000000002C10000-memory.dmp

        memory/2896-140-0x0000000001D30000-0x0000000001D38000-memory.dmp

        memory/2896-163-0x000007FEEC8D0000-0x000007FEED26D000-memory.dmp

        memory/2896-173-0x000007FEEC8D0000-0x000007FEED26D000-memory.dmp

        memory/2896-172-0x0000000002B90000-0x0000000002C10000-memory.dmp

        memory/2896-113-0x000000001B480000-0x000000001B762000-memory.dmp

        memory/2896-170-0x0000000002B9B000-0x0000000002C02000-memory.dmp

        memory/2896-164-0x0000000002B90000-0x0000000002C10000-memory.dmp

        memory/3052-180-0x0000000002D80000-0x0000000002E00000-memory.dmp

        memory/3052-181-0x0000000002D80000-0x0000000002E00000-memory.dmp

        memory/3052-198-0x000007FEEC8D0000-0x000007FEED26D000-memory.dmp

        memory/3052-193-0x0000000002D8B000-0x0000000002DF2000-memory.dmp

        memory/3052-178-0x000007FEEC8D0000-0x000007FEED26D000-memory.dmp

        memory/3052-179-0x0000000002D80000-0x0000000002E00000-memory.dmp

        memory/3056-189-0x0000000002DC4000-0x0000000002DC7000-memory.dmp

        memory/3056-186-0x000007FEEC8D0000-0x000007FEED26D000-memory.dmp

        memory/3056-183-0x0000000002DCB000-0x0000000002E32000-memory.dmp