The signature is created asynchronously for performance reasons and indicates if the file was removed after loading. I just wanted to share a little bit of my initial thoughts about utilizing the Sysmon rule tagging capabilities to start categorizing some of the data that you might be collecting via Sysmon. Sysmon modular’s configuration for these event IDs is an exclude first operation. Driver loaded:         4 https://www.blackhillsinfosec.com/services/cyber-range/. To exclude the MpCmdRun.exe image from the event ID 7 configuration block, we had to create a completely new RuleGroup, otherwise, on config file update, an error would be thrown. About 20% of the logged Sysmon events on this lab system were EID22, so clearly, this event is up for review as to its usefulness. Ultimate Windows Security is a division of Monterey Technology Group, Inc. ©2006-2021 A very simple event ID to interpret is EID16: Sysmon Config Change. While technically MS Defender is “side-loading” a DLL, this is a great opportunity for introducing the theory of event tuning. 1: Process creation This is an event from Sysmon. This blog is being provided to demonstrate the capabilities of Sysmon logging broken down by event ID. There is clearly some value in monitoring these events. When a consumer binds to a filter, this event logs the consumer name and filter path In version 6.10 it tracks the creation and deletion of __EventFilter Class, Any Consumer Type Class and __FilterToConsumerBinding Class. Pentest tools, malware tools, and lots of other software often utilize the SMB protocol. From StixIoC server … After reviewing these groupRelation configuration parameters, it appeared that the logical “and” operator was the issue. As shown below, we also see the partial command line. Sysmon. Security Log Join the BHIS Blog Mailing List – get notified when we post new blogs, webcasts, and podcasts. I would start implementing sysmon 10.42 with the latest schema and see if it changes something in your case. The creation of both a .cmd and .bat file are then logged to disk. Targeted WEF subscription. It is described as “Driver Loaded” and systems on this particular network had reported no Sysmon event ID 6’s in the last 24 hour period. ของ sysmon. Note the zone.identifier file highlighted in the event content referred to in the Sysinternals page for sysmon as the “mark of the web.”. 6: Driver loaded. There are also some very interesting templates that can be applied to Sysmon 6.0 that help focus the logging on events that are relevant to endpoint investigations and threat detection. One of the best that I have seen so far is this one. Figure 4. This event is disabled by default and needs to be configured with the –l … Event ID 9 is listed as RawAccessRead events. Quick stepback here to provide a definition for “userland.”. October 18, 2017 by Carlos Perez in … ImageLoaded: C:\Windows\System32\drivers\usbscan.sys The selection is intended to demonstrate the capability of sysmon modular. Enable it and filter out the norm. It is described as “Driver Loaded” and systems on this particular network had reported no Sysmon event ID 6’s in the last 24 hour period. Every time a process starts, or you log into your PC, or just about anything else … Events collected from all hosts, this includes some role-specific events, which will only be emitted by those machines. For example, for a file, the path would be included. Sysmon version 13 added process tampering to address Johnny Shaw’s process herpaderping technique (based on hollowing, etc). Event ID 3s are for documenting network connections. Sysmon event ID 5 appears to be a rare event. Enter your email address and every time a post goes live you'll get an instant notification!     Sysmon Event ID 5. I was able to trigger this event by restarting the Sysmon service. https://docs.microsoft.com/en-us/dotnet/standard/io/how-to-use-named-pipes-for-network-interprocess-communication, https://book.hacktricks.xyz/pentesting/pentesting-smb. So, let’s install Sysmon and review. Moving on now to event ID 8, CreateRemoteThread. It was a long journey to get here and I’d like to thank a few folks who made this possible. DNS in general is a sore subject for defenders as the log volume often becomes substantially large when ingesting data into the SIEM and probably one of the highest areas of visibility that threat hunters first look at. Event ID 6: Driver Loaded. Event ID 6 was also rare. Must be a 1-5 digit number Sign up Why GitHub? One of the events was a graphics driver. Warning, warning: the branch under cmd.exe is anomalous! It provides the UtcTime, ProcessGuid and ProcessId of the process. For restrictive environments, users should have limited privilege to write to a workstation’s disk, normally locations including C:\users\%username%\ or in some cases redirected user locations to network shares. This event ID was also rare but had occurred once each day on the system being analyzed for this blog. This results in capture!!!! Event ID 7 covers image load operations and the processes that instantiate them. A selection of the filtered event logs are shown below.         Valid Event ID 10 is a very interesting event and is listed as ProcessAccess. This occurs when an image requests a “priv” to access another process. Source: Sysmon: Discussions on Event ID 5 Ask a question about this event. A PowerShell download was not caught with this particular event ID but could have been captured with Event ID 11 had the configuration file been properly tuned to catch .zip files. DNS events are useful and when coupled with event ID 3, network connection and file write events can help produce a complete picture. To confirm this would catch the technique, after compiling the project, I used the compiled ProcessHerpaderping.exe file and executed it. Additional investigations may be warranted, though at this time, capturing WMI events in this fashion is recommended. As shown in the next screenshot, MS Defender asked to take a quick peek at LSASS and the system granted the appropriate access. Event ID 16: Sysmon config state changed บันทึกข้อมูลเมื่อพบว่ามีการเปลี่ยนแปลงไฟล์ config. It is probable that Olaf has implemented the best possible solution for the noise of WMIC and related events. The following snippets will show you what to edit. The IDs will be captured in context and matched to their sysmon-modular configuration section for tuning opportunities. Randy Franklin Smith (ultimatewindowssecurity.com fame) describes this event as being reported when “a process conducts reading operations from the drive using the \\.\ denotation.” After further reading, this is what is listed on the Sysinternals site for sysmon as well. The technique is called “Timestomping” and the articles listed below include the MITRE page and a SpectreOps article that has a PoC. - MHaggis/sysmon-dfir The established image names and connection types from the modular configuration then result in mapped techniques. 10: ProcessAccess This is an event from Sysmon. Instead, I created a more abstract graph showing that, say, the PowerShell node has a single connection to any app it has launched by any user— one for Excel, IE browser, etc. You should not get any other events after that unless you launch PowerShell. But, the first event, Event ID 1, caught a process creation event. https://attack.mitre.org/techniques/T1574/002/. As of December 28, 2020, the modular repo could use a pull request to fix this logical flaw.
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