( source = "WinEventLog:Application" ( "HTool-" OR "Hacktool" OR "ASP/Backdoor" OR "JSP/Backdoor" OR "PHP/Backdoor" OR "Backdoor.ASP" OR "Backdoor.JSP" OR "Backdoor.PHP" OR "Webshell" OR "Portscan" OR "Mimikatz" OR ".WinCred." OR "PlugX" OR "Korplug" OR "Pwdump" OR "Chopper" OR "WmiExec" OR "Xscan" OR "Clearlog" OR "ASPXSpy" OR "Ransom" OR "Filecoder" OR "CobaltStr" OR "PWCrack" OR "DumpCreds" OR "MPreter" OR "Koadic" OR "Packed.Generic.347" OR "COBEACON" OR "Cometer" OR "Keylogger" OR "MeteTool" ) NOT (( "Keygen" OR "Crack" OR "anti_ransomware_service.exe" OR "cyber-protect-service.exe" ) OR ( Level = "4" ))) To download and install the Sigma repository (which includes Sigmac): I should point out Sigmac will soon be deprecated in favour of pySigma, but for now Sigmac is still the most fully featured option of the two to convert Sigma rules into other target query languages. Sigmac, a tool shipped in the core Sigma repository can do this. One of the founding ideas of the Sigma project was to create a generic rule format that could be automatically translated to other target formats to solve this problem. You probably have numerous security tools in own your stack, each with different rule formats and languages, before considering those of your peers at other companies. Manually converting Sigma Rules into other query languages is a pain, requiring you to be an expert in all the other query languages for which you want to disseminate the rule (and this can be a long list). In this post I will show you how to use Sigmac to automatically transform your Sigma Rules into other target query languages. Please view the post on for the full interactive viewing experience. Sigma is meant to be an open standard in which such detection mechanisms can be defined, shared and collected in order to improve the detection capabilities for everyone.If you are reading this blog post via a 3rd party source it is very likely that many parts of it will not render correctly. Others provide excellent analyses, include IOCs and YARA rules to detect the malicious files and network connections, but have no way to describe a specific or generic detection method in log events. Some of their searches and correlations are great and very useful but they lack a standardized format in which they can share their work with others. People start working on their own, processing numerous white papers, blog posts and log analysis guidelines, extracting the necessary information and build their own searches and dashboard. Today, everyone collects log data for analysis. Provide Sigma signatures for malicious behaviour in your own application.Share the signature in threat intel communities - e.g.Share the signature in the appendix of your analysis along with IOCs and YARA rules.Write your SIEM searches in Sigma to avoid a vendor lock-in.Describe your detection method in Sigma to make it shareable. ![]() Sigma is for log files what Snort is for network traffic and YARA is for files. The main purpose of this project is to provide a structured form in which researchers or analysts can describe their once developed detection methods and make them shareable with others. The rule format is very flexible, easy to write and applicable to any type of log file. ![]() ![]() Sigma is a generic and open signature format that allows you to describe relevant log events in a straightforward manner. Generic Signature Format for SIEM Systems What is Sigma
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |