Query: Sigma YAML for antivirus
Matching passage: Sigma rule: Detects a highly relevant Antivirus alert that reports a web shell. It's highly recommended to tune this rule to the spe. Logsource: antivirus. Rule: title: Antivirus - Web Shell Detection Signature id: fdf135a2-9241-4f96-a114-bb404948f736 status: test description: 'Detects a highly relevant Antivirus alert that reports a web shell. It''s highly recommended to tune this rule to the specific strings used by your anti virus solution by downloading a big WebShell repository from e.g. github and checking the matches. This event must not be ignored just because the AV has blocked the malware but investigate, how it came there in the first place. ' references: - https://www.nextron-systems.com/?s=antivirus - https://github.com/tennc/webshell - https://www.virustotal.com/gui/file/bd1d52289203866645e556e2766a21d2275877fbafa056a76fe0cf884b7f8819/detection - https://www.virustotal.com/gui/file/308487ed28a3d9abc1fec7ebc812d4b5c07ab025037535421f64c60d3887a3e8/detection - https://www.virustotal.com/gui/file/7d3cb8a8ff28f82b07f382789247329ad2d7782a72dde9867941f13266310c80/detection - https://www.virustotal.com/gui/file/e841675a4b82250c75273ebf0861245f80c6a1c3d5803c2d995d9d3b18d5c4b5/detection - https://www.virustotal.com/gui/file/a80042c61a0372eaa0c2c1e831adf0d13ef09feaf71d1d20b216156269045801/detection - https://www.virustotal.com/gui/file/b219f7d3c26f8bad7e175934cd5eda4ddb5e3983503e94ff07d39c0666821b7e/detection - https://www.virustotal.com/gui/file/b8702acf32fd651af9f809ed42d15135f842788cd98d81a8e1b154ee2a2b76a2/detection - https://www.virustotal.com/gui/file/13ae8bfbc02254b389ab052aba5e1ba169b16a399d9bc4cb7414c4a73cd7dc78/detection author: Florian Roth (Nextron Systems), Arnim Rupp date: 2018-09-09 modified: 2026-06-29 tags: - attack.persistence - attack.t1505.003 logsource: category: antivirus detection: selection: - Signature|startswith: - ASP. - IIS/BackDoor - JAVA/Backdoor - JSP. - Perl. - PHP. - Troj/ASP - Troj/JSP - Troj/PHP - VBS/Uxor - Signature|contains: - ASP_ - 'ASP:' - ASP.Agent - ASP/ - Aspdoor - ASPXSpy - Backdoor.ASP - Backdoor.Java - Backdoor.JSP - Backdoor.PHP - Backdoor.VBS - Backdoor/ASP - Backdoor/Java - Backdoor/JSP - Backdoor/PHP - Backdoor/VBS - C99shell - Chopper - filebrowser - JSP_ - 'JSP:' - JSP.Agent - JSP/ - 'Perl:' - Perl/ - PHP_ - 'PHP:' - PHP.Agent - PHP/ - PHPShell - PShlSpy - SinoChoper - Trojan.ASP - Trojan.JSP - Trojan.PHP - Trojan.VBS - VBS.Agent - VBS/Agent - Webshell condition: selection falsepositives: - Unlikely level: high
Near-miss passage: Sigma rule: Detects blocked load attempts of revoked drivers. Logsource: windows / codeintegrity-operational. Rule: title: CodeIntegrity - Blocked Driver Load With Revoked Certificate id: 9b72b82d-f1c5-4632-b589-187159bc6ec1 status: test description: Detects blocked load attempts of revoked drivers references: - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/windows-defender-application-control/operations/event-id-explanations - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/windows-defender-application-control/operations/event-tag-explanations - Internal Research author: Nasreddine Bencherchali (Nextron Systems) date: 2023-06-06 tags: - attack.persistence - attack.privilege-escalation - attack.t1543 logsource: product: windows service: codeintegrity-operational detection: selection: EventID: 3023 condition: selection falsepositives: - Unknown level: high