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More perf-related rule updates. #104

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Aug 2, 2016
Merged

More perf-related rule updates. #104

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4 changes: 2 additions & 2 deletions rules/falco_rules.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -230,7 +230,7 @@

- rule: modify_binary_dirs
desc: an attempt to modify any file below a set of binary directories.
condition: modify and bin_dir_rename and not package_mgmt_procs
condition: bin_dir_rename and modify and not package_mgmt_procs
output: "File below known binary directory renamed/removed (user=%user.name command=%proc.cmdline operation=%evt.type file=%fd.name %evt.args)"
priority: WARNING

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# (we may need to add additional checks against false positives, see: https://bugs.launchpad.net/ubuntu/+source/rkhunter/+bug/86153)
- rule: create_files_below_dev
desc: creating any files below /dev other than known programs that manage devices. Some rootkits hide files in /dev.
condition: (evt.type = creat or (evt.type = open and evt.arg.flags contains O_CREAT)) and proc.name != blkid and fd.directory = /dev and not fd.name in (/dev/null,/dev/stdin,/dev/stdout,/dev/stderr,/dev/tty)
condition: fd.directory = /dev and (evt.type = creat or (evt.type = open and evt.arg.flags contains O_CREAT)) and proc.name != blkid and not fd.name in (/dev/null,/dev/stdin,/dev/stdout,/dev/stderr,/dev/tty)
output: "File created below /dev by untrusted program (user=%user.name command=%proc.cmdline file=%fd.name)"
priority: WARNING

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