Analysis

  • max time kernel
    72s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    27/10/2022, 09:26

General

  • Target
    6D4AC58DA19A639E21EBA4F4AEBF1C4B61C1DE2877EB3.exe
  • Size 1.4MB
  • Sample221027-ld69zabff7
  • SHA256 6d4ac58da19a639e21eba4f4aebf1c4b61c1de2877eb3c5e8044fed7cd79a068
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • DcRat

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

  • Process spawned unexpected child process 24 IoCs

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

  • DCRat payload 9 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 9 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 24 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6D4AC58DA19A639E21EBA4F4AEBF1C4B61C1DE2877EB3.exe
    "C:\Users\Admin\AppData\Local\Temp\6D4AC58DA19A639E21EBA4F4AEBF1C4B61C1DE2877EB3.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1456
    • C:\Users\Admin\AppData\Local\Temp\6D4AC58DA19A639E21EBA4F4AEBF1C4B61C1DE2877EB3.exe
      C:\Users\Admin\AppData\Local\Temp\6D4AC58DA19A639E21EBA4F4AEBF1C4B61C1DE2877EB3.exe
      2⤵
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:968
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\hFWg9fgpFo.bat"
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1544
        • C:\Windows\SysWOW64\w32tm.exe
          w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:828
          • C:\Windows\system32\w32tm.exe
            w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
            5⤵
              PID:1000
          • C:\Program Files (x86)\Windows Media Player\spoolsv.exe
            "C:\Program Files (x86)\Windows Media Player\spoolsv.exe"
            4⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1996
            • C:\Program Files (x86)\Windows Media Player\spoolsv.exe
              "C:\Program Files (x86)\Windows Media Player\spoolsv.exe"
              5⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:976
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Media Player\spoolsv.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:776
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Media Player\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1204
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Media Player\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1532
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 7 /tr "'C:\Program Files\Common Files\Microsoft Shared\TextConv\fr-FR\taskhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1008
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Program Files\Common Files\Microsoft Shared\TextConv\fr-FR\taskhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:960
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 9 /tr "'C:\Program Files\Common Files\Microsoft Shared\TextConv\fr-FR\taskhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1580
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1512
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Users\Admin\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:576
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1624
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files\Google\Chrome\Application\SetupMetrics\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1648
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\Application\SetupMetrics\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1660
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Program Files\Google\Chrome\Application\SetupMetrics\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:532
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\Favorites\Windows Live\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:860
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\Admin\Favorites\Windows Live\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:836
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 12 /tr "'C:\Users\Admin\Favorites\Windows Live\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2012
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Portable Devices\Idle.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:696
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1716
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Portable Devices\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1692
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorere" /sc MINUTE /mo 8 /tr "'C:\Recovery\d6223342-1a8a-11ed-b209-a59dca5554ed\explorer.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1744
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\d6223342-1a8a-11ed-b209-a59dca5554ed\explorer.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1460
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorere" /sc MINUTE /mo 12 /tr "'C:\Recovery\d6223342-1a8a-11ed-b209-a59dca5554ed\explorer.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1740
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\winlogon.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1808
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1732
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:652

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          spoolsv.exe

          • Path C:\Program Files (x86)\Windows Media Player\spoolsv.exe
          • Size 1.4MB
          • SHA256 6d4ac58da19a639e21eba4f4aebf1c4b61c1de2877eb3c5e8044fed7cd79a068
          • MD5 SHA1 SHA512 SSDEEP

          spoolsv.exe

          • Path C:\Program Files (x86)\Windows Media Player\spoolsv.exe
          • Size 1.4MB
          • SHA256 6d4ac58da19a639e21eba4f4aebf1c4b61c1de2877eb3c5e8044fed7cd79a068
          • MD5 SHA1 SHA512 SSDEEP

          spoolsv.exe

          • Path C:\Program Files (x86)\Windows Media Player\spoolsv.exe
          • Size 1.4MB
          • SHA256 6d4ac58da19a639e21eba4f4aebf1c4b61c1de2877eb3c5e8044fed7cd79a068
          • MD5 SHA1 SHA512 SSDEEP

          hFWg9fgpFo.bat

          • Path C:\Users\Admin\AppData\Local\Temp\hFWg9fgpFo.bat
          • Size 220B
          • SHA256 8f60154d2402ae92af3d946dc4bf9c743fb9c7e2097198ca2f93acc763e2d3b0
          • MD5 SHA1 SHA512

          spoolsv.exe

          • Path \Program Files (x86)\Windows Media Player\spoolsv.exe
          • Size 1.4MB
          • SHA256 6d4ac58da19a639e21eba4f4aebf1c4b61c1de2877eb3c5e8044fed7cd79a068
          • MD5 SHA1 SHA512 SSDEEP

          spoolsv.exe

          • Path \Program Files (x86)\Windows Media Player\spoolsv.exe
          • Size 1.4MB
          • SHA256 6d4ac58da19a639e21eba4f4aebf1c4b61c1de2877eb3c5e8044fed7cd79a068
          • MD5 SHA1 SHA512 SSDEEP

          spoolsv.exe

          • Path \Program Files (x86)\Windows Media Player\spoolsv.exe
          • Size 1.4MB
          • SHA256 6d4ac58da19a639e21eba4f4aebf1c4b61c1de2877eb3c5e8044fed7cd79a068
          • MD5 SHA1 SHA512 SSDEEP

          memory/968-63-0x0000000000400000-0x00000000004F8000-memory.dmp

          memory/968-62-0x0000000000400000-0x00000000004F8000-memory.dmp

          memory/968-66-0x0000000000400000-0x00000000004F8000-memory.dmp

          memory/968-68-0x0000000000400000-0x00000000004F8000-memory.dmp

          memory/968-70-0x0000000000340000-0x000000000035C000-memory.dmp

          memory/968-71-0x0000000000370000-0x0000000000386000-memory.dmp

          memory/968-72-0x00000000003A0000-0x00000000003B0000-memory.dmp

          memory/968-73-0x00000000003D0000-0x00000000003D8000-memory.dmp

          memory/968-74-0x0000000000610000-0x000000000061C000-memory.dmp

          memory/968-75-0x0000000000620000-0x0000000000632000-memory.dmp

          memory/968-76-0x0000000000650000-0x000000000065E000-memory.dmp

          memory/968-58-0x0000000000400000-0x00000000004F8000-memory.dmp

          memory/968-59-0x0000000000400000-0x00000000004F8000-memory.dmp

          memory/968-61-0x0000000000400000-0x00000000004F8000-memory.dmp

          memory/976-99-0x0000000000400000-0x00000000004F8000-memory.dmp

          memory/976-101-0x0000000000400000-0x00000000004F8000-memory.dmp

          memory/1456-54-0x0000000000880000-0x00000000009EA000-memory.dmp

          memory/1456-57-0x00000000768A1000-0x00000000768A3000-memory.dmp

          memory/1456-56-0x00000000005B0000-0x00000000005B6000-memory.dmp

          memory/1456-55-0x0000000007100000-0x0000000007448000-memory.dmp

          memory/1996-87-0x0000000001220000-0x000000000138A000-memory.dmp