Analysis

  • max time kernel
    54s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    16/10/2022, 01:31

General

  • Target
    06f5e7e201f516c298baa0a3f64cec71.exe
  • Size 1.4MB
  • Sample221016-bxdfwsgfc4
  • SHA256 7e53cfc5aa663350d7e0aced0d7d46d358b81d0c7c0a7a09c7eeb422f3208a2c
  • 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 15 IoCs
  • Process spawned unexpected child process 45 IoCs

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

  • DCRat payload 8 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Disables Task Manager via registry modification
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 28 IoCs
  • Drops file in Program Files directory 10 IoCs
  • Drops file in Windows directory 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 45 IoCs

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

  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\06f5e7e201f516c298baa0a3f64cec71.exe
    "C:\Users\Admin\AppData\Local\Temp\06f5e7e201f516c298baa0a3f64cec71.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1960
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\MsHyper\hymtX7zEN4U5nshgBbRY88oEFl63P.vbe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1724
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\MsHyper\SKFOl8fXFh.bat" "
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1468
        • C:\MsHyper\hypernet.exe
          "C:\MsHyper\hypernet.exe"
          4⤵
          • Modifies WinLogon for persistence
          • Executes dropped EXE
          • 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:1264
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\ZUgF3RjQao.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:2284
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              6⤵
                PID:2320
              • C:\MsHyper\WmiPrvSE.exe
                "C:\MsHyper\WmiPrvSE.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:2352
          • C:\Windows\SysWOW64\reg.exe
            reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
            4⤵
            • Modifies registry key
            PID:2332
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\MsHyper\file.vbs"
        2⤵
          PID:956
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Sidebar\spoolsv.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1068
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\spoolsv.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1776
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Sidebar\spoolsv.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:984
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\spoolsv.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1824
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\spoolsv.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 "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\spoolsv.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:300
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows NT\dwm.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1944
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files\Windows NT\dwm.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1688
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows NT\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 "smsss" /sc MINUTE /mo 10 /tr "'C:\MsHyper\smss.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:976
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\MsHyper\smss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2024
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "smsss" /sc MINUTE /mo 9 /tr "'C:\MsHyper\smss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1948
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'C:\MsHyper\spoolsv.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:108
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\MsHyper\spoolsv.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:892
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 6 /tr "'C:\MsHyper\spoolsv.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1608
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 12 /tr "'C:\MsHyper\WMIADAP.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1680
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\MsHyper\WMIADAP.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2000
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 9 /tr "'C:\MsHyper\WMIADAP.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1516
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\Recovery\c0f67622-1a8a-11ed-ae9f-b21da26d38ed\lsass.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1724
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Recovery\c0f67622-1a8a-11ed-ae9f-b21da26d38ed\lsass.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1812
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'C:\Recovery\c0f67622-1a8a-11ed-ae9f-b21da26d38ed\lsass.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1408
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Windows\Offline Web Pages\System.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:280
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Windows\Offline Web Pages\System.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1800
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Windows\Offline Web Pages\System.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:572
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 14 /tr "'C:\Users\All Users\Start Menu\Idle.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1872
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Users\All Users\Start Menu\Idle.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:284
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 6 /tr "'C:\Users\All Users\Start Menu\Idle.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:908
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 8 /tr "'C:\MsHyper\WmiPrvSE.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1700
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\MsHyper\WmiPrvSE.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1048
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 6 /tr "'C:\MsHyper\WmiPrvSE.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 "WmiPrvSEW" /sc MINUTE /mo 14 /tr "'C:\MsHyper\WmiPrvSE.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:964
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\MsHyper\WmiPrvSE.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:996
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 8 /tr "'C:\MsHyper\WmiPrvSE.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:688
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows NT\TableTextService\it-IT\spoolsv.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1568
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files\Windows NT\TableTextService\it-IT\spoolsv.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:784
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows NT\TableTextService\it-IT\spoolsv.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1616
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 13 /tr "'C:\Windows\DigitalLocker\en-US\wininit.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2072
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\DigitalLocker\en-US\wininit.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2096
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 14 /tr "'C:\Windows\DigitalLocker\en-US\wininit.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2116
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 11 /tr "'C:\Windows\security\ApplicationId\PolicyManagement\dwm.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2140
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\security\ApplicationId\PolicyManagement\dwm.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2160
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 11 /tr "'C:\Windows\security\ApplicationId\PolicyManagement\dwm.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2188
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Defender\fr-FR\WmiPrvSE.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2208
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\fr-FR\WmiPrvSE.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2236
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Defender\fr-FR\WmiPrvSE.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2260

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            SKFOl8fXFh.bat

            • Path C:\MsHyper\SKFOl8fXFh.bat
            • Size 137B
            • SHA256 38a693268e38a59827c69cc3f5b3d44f8107d348e9c6c785f20d15350b85f62a
            • MD5 SHA1 SHA512

            WmiPrvSE.exe

            • Path C:\MsHyper\WmiPrvSE.exe
            • Size 1.1MB
            • SHA256 ae1b099ce5538752b28e4ff9f982fd6580d0af74e8979c6832516f0a9792bda9
            • MD5 SHA1 SHA512 SSDEEP

            WmiPrvSE.exe

            • Path C:\MsHyper\WmiPrvSE.exe
            • Size 1.1MB
            • SHA256 ae1b099ce5538752b28e4ff9f982fd6580d0af74e8979c6832516f0a9792bda9
            • MD5 SHA1 SHA512 SSDEEP

            file.vbs

            • Path C:\MsHyper\file.vbs
            • Size 34B
            • SHA256 f1cccb5ae4aa51d293bd3c7d2a1a04cb7847d22c5db8e05ac64e9a6d7455aa0b
            • MD5 SHA1 SHA512

            hymtX7zEN4U5nshgBbRY88oEFl63P.vbe

            • Path C:\MsHyper\hymtX7zEN4U5nshgBbRY88oEFl63P.vbe
            • Size 194B
            • SHA256 1a09a2899b741156424bea0997767d972e12c24d19fe23b44a97d43f1596b78f
            • MD5 SHA1 SHA512

            hypernet.exe

            • Path C:\MsHyper\hypernet.exe
            • Size 1.1MB
            • SHA256 ae1b099ce5538752b28e4ff9f982fd6580d0af74e8979c6832516f0a9792bda9
            • MD5 SHA1 SHA512 SSDEEP

            hypernet.exe

            • Path C:\MsHyper\hypernet.exe
            • Size 1.1MB
            • SHA256 ae1b099ce5538752b28e4ff9f982fd6580d0af74e8979c6832516f0a9792bda9
            • MD5 SHA1 SHA512 SSDEEP

            ZUgF3RjQao.bat

            • Path C:\Users\Admin\AppData\Local\Temp\ZUgF3RjQao.bat
            • Size 188B
            • SHA256 4ae31f15848abbdd756abee9e38ba7780987bbf07e9d4cdf7bdfd8a5394af702
            • MD5 SHA1 SHA512

            hypernet.exe

            • Path \MsHyper\hypernet.exe
            • Size 1.1MB
            • SHA256 ae1b099ce5538752b28e4ff9f982fd6580d0af74e8979c6832516f0a9792bda9
            • MD5 SHA1 SHA512 SSDEEP

            hypernet.exe

            • Path \MsHyper\hypernet.exe
            • Size 1.1MB
            • SHA256 ae1b099ce5538752b28e4ff9f982fd6580d0af74e8979c6832516f0a9792bda9
            • MD5 SHA1 SHA512 SSDEEP

            memory/1264-68-0x0000000000C40000-0x0000000000D6A000-memory.dmp

            memory/1264-69-0x00000000005C0000-0x00000000005C8000-memory.dmp

            memory/1264-70-0x0000000000900000-0x000000000091C000-memory.dmp

            memory/1264-71-0x0000000000920000-0x0000000000936000-memory.dmp

            memory/1264-72-0x0000000000C30000-0x0000000000C38000-memory.dmp

            memory/1960-54-0x00000000751A1000-0x00000000751A3000-memory.dmp

            memory/2352-80-0x0000000001190000-0x00000000012BA000-memory.dmp