Query: rule covering Detects a highly relevant Antivirus alert that reports a web shell. It's highly recommended to tune this rule to the spe
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 when an attacker registers a new IFilter for an extension. Microsoft Windows Search uses filters to extract the. Logsource: windows / registry_set. Rule: title: Register New IFiltre For Persistence id: b23818c7-e575-4d13-8012-332075ec0a2b status: test description: 'Detects when an attacker registers a new IFilter for an extension. Microsoft Windows Search uses filters to extract the content of items for inclusion in a full-text index. You can extend Windows Search to index new or proprietary file types by writing filters to extract the content, and property handlers to extract the properties of files. ' references: - https://persistence-info.github.io/Data/ifilters.html - https://twitter.com/0gtweet/status/1468548924600459267 - https://github.com/gtworek/PSBits/tree/master/IFilter - https://github.com/gtworek/PSBits/blob/8d767892f3b17eefa4d0668f5d2df78e844f01d8/IFilter/Dll.cpp#L281-L308 author: Nasreddine Bencherchali (Nextron Systems) date: 2022-07-21 modified: 2024-03-26 tags: - attack.persistence logsource: category: registry_set product: windows detection: selection_ext: TargetObject|contains|all: - \SOFTWARE\Classes\. - \PersistentHandler selection_clsid: TargetObject|contains|all: - \SOFTWARE\Classes\CLSID - \PersistentAddinsRegistered\{89BCB740-6119-101A-BCB7-00DD010655AF} filter_default_targets: TargetObject|contains: - \CLSID\{4F46F75F-199F-4C63-8B7D-86D48FE7970C}\ - \CLSID\{4887767F-7ADC-4983-B576-88FB643D6F79}\ - \CLSID\{D3B41FA1-01E3-49AF-AA25-1D0D824275AE}\ - \CLSID\{72773E1A-B711-4d8d-81FA-B9A43B0650DD}\ - \CLSID\{098f2470-bae0-11cd-b579-08002b30bfeb}\ - \CLSID\{1AA9BF05-9A97-48c1-BA28-D9DCE795E93C}\ - \CLSID\{2e2294a9-50d7-4fe7-a09f-e6492e185884}\ - \CLSID\{34CEAC8D-CBC0-4f77-B7B1-8A60CB6DA0F7}\ - \CLSID\{3B224B11-9363-407e-850F-C9E1FFACD8FB}\ - \CLSID\{3DDEB7A4-8ABF-4D82-B9EE-E1F4552E95BE}\ - \CLSID\{5645C8C1-E277-11CF-8FDA-00AA00A14F93}\ - \CLSID\{5645C8C4-E277-11CF-8FDA-00AA00A14F93}\ - \CLSID\{58A9EBF6-5755-4554-A67E-A2467AD1447B}\ - \CLSID\{5e941d80-bf96-11cd-b579-08002b30bfeb}\ - \CLSID\{698A4FFC-63A3-4E70-8F00-376AD29363FB}\ - \CLSID\{7E9D8D44-6926-426F-AA2B-217A819A5CCE}\ - \CLSID\{8CD34779-9F10-4f9b-ADFB-B3FAEABDAB5A}\ - \CLSID\{9694E38A-E081-46ac-99A0-8743C909ACB6}\ - \CLSID\{98de59a0-d175-11cd-a7bd-00006b827d94}\ - \CLSID\{AA10385A-F5AA-4EFF-B3DF-71B701E25E18}\ - \CLSID\{B4132098-7A03-423D-9463-163CB07C151F}\ - \CLSID\{d044309b-5da6-4633-b085-4ed02522e5a5}\ - \CLSID\{D169C14A-5148-4322-92C8-754FC9D018D8}\ - \CLSID\{DD75716E-B42E-4978-BB60-1497B92E30C4}\ - \CLSID\{E2F83EED-62DE-4A9F-9CD0-A1D40DCD13B6}\ - \CLSID\{E772CEB3-E203-4828-ADF1-765713D981B8}\ - \CLSID\{eec97550-47a9-11cf-b95