{"id":"c8e35e96-19ce-4f16-aeb6-fd5588dc5365","title":"Suspicious Named Error","description":"Detects suspicious DNS error messages that indicate a fatal or suspicious error that could be caused by exploiting attempts","author":"Florian Roth (Nextron Systems)","status":"test","level":"high","date":"2018-02-20","modified":"2022-10-05","tags":["attack.initial-access","attack.t1190"],"technique_ids":["T1190"],"logsource":{"product":"linux","service":"syslog"},"falsepositives":["Unknown"],"references":["https://github.com/ossec/ossec-hids/blob/1ecffb1b884607cb12e619f9ab3c04f530801083/etc/rules/named_rules.xml"],"source_path":"rules/linux/builtin/syslog/lnx_syslog_susp_named.yml","source_sha256":"5b6242df3e3343be5b0822071a015f66bfbef2efa39930b29546b92fc66bd59b","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/linux/builtin/syslog/lnx_syslog_susp_named.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious Named Error\nid: c8e35e96-19ce-4f16-aeb6-fd5588dc5365\nstatus: test\ndescription: Detects suspicious DNS error messages that indicate a fatal or suspicious error that could be caused by exploiting attempts\nreferences:\n    - https://github.com/ossec/ossec-hids/blob/1ecffb1b884607cb12e619f9ab3c04f530801083/etc/rules/named_rules.xml\nauthor: Florian Roth (Nextron Systems)\ndate: 2018-02-20\nmodified: 2022-10-05\ntags:\n    - attack.initial-access\n    - attack.t1190\nlogsource:\n    product: linux\n    service: syslog\ndetection:\n    keywords:\n        - ' dropping source port zero packet from '\n        - ' denied AXFR from '\n        - ' exiting (due to fatal error)'\n    condition: keywords\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1190","id":"T1190","name":"Exploit Public-Facing Application","page":"techniques/enterprise/T1190/"}],"data_path":"data/detection-rules/c8e35e96-19ce-4f16-aeb6-fd5588dc5365.json","kind":"sigma"}