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fix(rules): modification of a file should trigger as if it was opened or created

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Signed-off-by: Lorenzo Fontana <lo@linux.com>
This commit is contained in:
Lorenzo Fontana 2019-08-13 13:14:26 +00:00 committed by Lorenzo Fontana
parent f05d18a847
commit 39b51562ed
1 changed files with 11 additions and 6 deletions
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17
rules/falco_rules.yaml
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@ -908,12 +908,15 @@
- macro: access_repositories - macro: access_repositories
condition: (fd.filename in (repository_files) or fd.directory in (repository_directories)) condition: (fd.filename in (repository_files) or fd.directory in (repository_directories))
- macro: modify_repositories
condition: (evt.arg.newpath pmatch (repository_directories))
- rule: Update Package Repository - rule: Update Package Repository
desc: Detect package repositories get updated desc: Detect package repositories get updated
condition: > condition: >
open_write and access_repositories and not package_mgmt_procs ((open_write and access_repositories) or (modify and modify_repositories)) and not package_mgmt_procs
output: > output: >
Repository files get updated (user=%user.name command=%proc.cmdline file=%fd.name container_id=%container.id image=%container.image.repository) Repository files get updated (user=%user.name command=%proc.cmdline file=%fd.name newpath=%evt.arg.newpath container_id=%container.id image=%container.image.repository)
priority: priority:
NOTICE NOTICE
tags: [filesystem, mitre_persistence] tags: [filesystem, mitre_persistence]
@ -2440,12 +2443,14 @@
- rule: Create Hidden Files or Directories - rule: Create Hidden Files or Directories
desc: Detect hidden files or directories created desc: Detect hidden files or directories created
condition: > condition: >
((mkdir and consider_hidden_file_creation and evt.arg.path contains "/.") or (consider_hidden_file_creation and (
(open_write and consider_hidden_file_creation and evt.arg.flags contains "O_CREAT" and (modify and evt.arg.newpath contains "/.") or
fd.name contains "/." and not fd.name pmatch (exclude_hidden_directories))) (mkdir and evt.arg.path contains "/.") or
(open_write and evt.arg.flags contains "O_CREAT" and fd.name contains "/." and not fd.name pmatch (exclude_hidden_directories)))
)
output: > output: >
Hidden file or directory created (user=%user.name command=%proc.cmdline Hidden file or directory created (user=%user.name command=%proc.cmdline
file=%fd.name container_id=%container.id container_name=%container.name image=%container.image.repository:%container.image.tag) file=%fd.name newpath=%evt.arg.newpath container_id=%container.id container_name=%container.name image=%container.image.repository:%container.image.tag)
priority: priority:
NOTICE NOTICE
tag: [file, mitre_persistence] tag: [file, mitre_persistence]