WLS 3.2 – new process creation data: ConsoleProcessId, SessionId, WindowStation


WLS 3.2 introduces a few new pieces of data for process creation events.

ConsoleProcessId

A process can define an associated console process. The value, if provided by the process, is logged.

[host] Security: LogType=”WLS”, BaseFileName=”cmd.exe”, Channel=”Security”, CommandLine=”‘C:\Windows\system32\cmd.exe'”, CompanyName=”Microsoft Corporation”, Computer=”[host].[domain]”, ConsoleProcessId=”0xd08″, CreatorProcessName=”explorer”, EventID=”4688″, EventRecordID=”13010758″, ExecutionProcessID=”4″, ExecutionThreadID=”64″, FileDescription=”Windows Command Processor”, FileVersion=”6.1.7601.17514 (win7sp1_rtm.101119-1850)”, InternalName=”cmd”, Keywords=”0x8020000000000000″, Language=”English (United States)”, Length=”345088″, Level=”0″, MD5=”5746BD7E255DD6A8AFA06F7C42C1BA41″, NewProcessId=”0x1250″, NewProcessName=”C:\Windows\System32\cmd.exe”, Opcode=”0″, ProcessId=”0x15a4″, ProductVersion=”6.1.7601.17514″, ProviderGuid=”{54849625-5478-4994-A5BA-3E3B0328C30D}”, ProviderName=”Microsoft-Windows-Security-Auditing”, SessionId=”2″, SHA1=”0F3C4FF28F354AEDE202D54E9D1C5529A3BF87D8″, Signed=”Catalog”, SSDeep=”6144:NVl7yDR2iaGcsVXFBM6IT77aVebJWC1jIdDWCoCX9Sm:jdyDRwpmFq6ITSebJWwjIdDbNS”, SubjectDomainName=”[domain]”, SubjectLogonId=”0x940ee”, SubjectUserName=”[user]”, SubjectUserSid=”[SID]”, Task=”13312″, TokenElevationType=”TokenElevationTypeDefault (1)”, ValidSignatureDate=”False”, Version=”0″, WindowStation=”Winsta0\Default”, Zone=”0″

[host] Security: LogType=”WLS”, BaseFileName=”conhost.exe”, Cached=”True”, Channel=”Security”, CommandLine=”\??\C:\Windows\system32\conhost.exe ‘-1619064235-21228482731568564810739129054211757705058345892-390116831-1302099848#000″, CompanyName=”Microsoft Corporation”, Computer=”[host].[domain]”, CreatorProcessName=”csrss”, EventID=”4688″, EventRecordID=”13010759″, ExecutionProcessID=”4″, ExecutionThreadID=”64″, FileDescription=”Console Window Host”, FileVersion=”6.1.7600.16385 (win7_rtm.090713-1255)”, InternalName=”ConHost”, Keywords=”0x8020000000000000″, Language=”English (United States)”, Length=”338432″, Level=”0″, MD5=”BF95EA5809E3BBF55370F7CB309FEBD0″, NewProcessId=”0xd08″, NewProcessName=”C:\Windows\System32\conhost.exe”, Opcode=”0″, ProcessId=”0x1194″, ProductVersion=”6.1.7600.16385″, ProviderGuid=”{54849625-5478-4994-A5BA-3E3B0328C30D}”, ProviderName=”Microsoft-Windows-Security-Auditing”, SessionId=”2″, SHA1=”1BD846AA22B1D63A1F900F6D08D8BFA8082AE4DB”, Signed=”Catalog”, SSDeep=”6144:MvAVUtrTB1pzQdTOKnJoWafxXyn1U+8kbYzwFH1mbRBlOxm:MaaTpzSLSffxXyp8kb5ElY”, SubjectDomainName=”[domain]”, SubjectLogonId=”0x3e7″, SubjectUserName=”[host]$”, SubjectUserSid=”S-1-5-18″, Task=”13312″, TokenElevationType=”TokenElevationTypeDefault (1)”, ValidSignatureDate=”False”, Version=”0″, WindowStation=”Winsta0\Default”, Zone=”0″

SessionId

Previous versions of WLS provided data in regards to session information which could be correlated with the environmental variable SESSIONNAME, but was a bit awkward when viewing child processes that carry forward these variables even when the session has changed. SessionId is now reported for each process and can positively correlate to the correct session, without worrying about inherited environmental variables.

WindowStation

WindowStation is now reported for each process, providing insight into how the process was executed. WinSta0 can display a user interface and can receive user input. Other window stations are non-interactive, and can be used to enforce security restrictions, such as providing a sandboxed environment.

Chrome, for example, makes use of other window stations:

[host] Security: LogType=”WLS”, BaseFileName=”chrome.exe”, Cached=”True”, Channel=”Security”, CLIENTNAME=”[remote_host]”, CommandLine=”‘C:\Program Files (x86)\Google\Chrome\Application\chrome.exe’ –type=renderer –lang=en-US –force-fieldtrials=’BrowserBlacklist/Enabled/ChromeSuggestions/Most Likely with Kodachrome/EmbeddedSearch/Group6 pct:10f stable:pp2 prefetch_results:1 reuse_instant_search_base_page:1/ExtensionInstallVerification/Enforce/GoogleNow/Enable/OmniboxBundledExperimentV1/StandardR4/Prerender/PrerenderEnabled/PrerenderLocalPredictorSpec/LocalPredictor=Disabled/QUIC/Disabled/SafeBrowsingIncidentReportingService/Default/ShowAppLauncherPromo/ShowPromoUntilDismissed/Test0PercentDefault/group_01/UMA-Dynamic-Binary-Uniformity-Trial/default/UMA-Dynamic-Uniformity-Trial/Group6/UMA-Population-Restrict/normal/UMA-Session-Randomized-Uniformity-Trial-5-Percent/group_10/UMA-Uniformity-Trial-1-Percent/group_06/UMA-Uniformity-Trial-10-Percent/group_08/UMA-Uniformity-Trial-100-Percent/group_01/UMA-Uniformity-Trial-20-Percent/group_03/UMA-Uniformity-Trial-5-Percent/group_12/UMA-Uniformity-Trial-50-Percent/group_01/VoiceTrigger/Install/’ –extension-process –renderer-print-preview –device-scale-factor=1 –enable-threaded-compositing –enable-delegated-renderer –channel=’616.4.232552611\176135091′ /prefetch:673131151″, CompanyName=”Google Inc.”, Computer=”[host].[domain]”, CreatorProcessName=”chrome”, EventID=”4688″, EventRecordID=”13010449″, ExecutionProcessID=”4″, ExecutionThreadID=”64″, FileDescription=”Google Chrome”, FileVersion=”37.0.2062.103″, InternalName=”chrome_exe”, Keywords=”0x8020000000000000″, Language=”English (United States)”, Length=”852808″, Level=”0″, MD5=”0706DDBD4EA0D122CA069FF2552E20FD”, NewProcessId=”0x1d84″, NewProcessName=”C:\Program Files (x86)\Google\Chrome\Application\chrome.exe”, Opcode=”0″, ProcessId=”0x268″, ProductVersion=”37.0.2062.103″, ProviderGuid=”{54849625-5478-4994-A5BA-3E3B0328C30D}”, ProviderName=”Microsoft-Windows-Security-Auditing”, SessionId=”2″, SESSIONNAME=”RDP-Tcp#0″, SHA1=”627A52C64711BE8132E1D32FD482178E7422CF4F”, Signed=”True”, SSDeep=”12288:59obX26I5VZVX5LTqLEOtPf5R/38i//lIaJJ7XtvKiI245OtCYQpl/ARG4KHFBnk:59GLtXtTRolaKlBnk”, SubjectDomainName=”[domain]”, SubjectLogonId=”0x940ee”, SubjectUserName=”[user]”, SubjectUserSid=”[SID]”, Task=”13312″, TokenElevationType=”TokenElevationTypeDefault (1)”, ValidSignatureDate=”True”, Version=”0″, WindowStation=”Service-0x0-940ee$\sbox_alternate_desktop_0x268″, Zone=”0″

MSDN – Window Stations


For more information on WLS, click “WLS Information” at the top, or here: WLS Information

If you’d like additional information about WLS, send me a note via the contact form. WLS is currently available to US entities, but does require a signed license agreement.

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