Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

rule update: add a rule to detect reverse shell #1152

Merged
merged 2 commits into from
Apr 21, 2020
Merged

rule update: add a rule to detect reverse shell #1152

Changes from 1 commit
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
93f65dd
rule update: add a rule to detect reverse shell
Kaizhe Apr 17, 2020
cb4f0b9
rename rule
Kaizhe Apr 20, 2020
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 6 additions & 1 deletion rules/falco_rules.yaml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2795,7 +2795,12 @@
priority: WARNING
tags: [network]


- rule: Reverse shell
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Can you make the rule name more specific to the actual behavior, something like "redirecting stdout to network connection in container"? There could be all kinds of reverse shells that don't use this technique.

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Done. Thanks!

desc: Detect reverse shell established remote connection in container.
condition: evt.type=dup and evt.dir=> and container and fd.num in (0, 1, 2) and fd.type in ("ipv4", "ipv6")
output: >
Reverse shell connection (user=%user.name %container.info process=%proc.name parent=%proc.pname cmdline=%proc.cmdline terminal=%proc.tty container_id=%container.id image=%container.image.repository fd.name=%fd.name fd.num=%fd.num fd.type=%fd.type fd.sip=%fd.sip)
priority: WARNING

# Application rules have moved to application_rules.yaml. Please look
# there if you want to enable them by adding to
Expand Down