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Delete or rename shell history: .ash_history #1956

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merged 3 commits into from
May 14, 2022
Merged

Delete or rename shell history: .ash_history #1956

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8765eeb
rule(macro modify_shell_history): include .ash_history
bdashrad Mar 23, 2022
95a6e0d
rule(macro truncate_shell_history): include .ash_history
bdashrad Mar 23, 2022
d345600
use endswith ash_history to catch both bash and ash
bdashrad May 9, 2022
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10 changes: 6 additions & 4 deletions rules/falco_rules.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -2568,26 +2568,28 @@
WARNING
tags: [process, mitre_persistence]

# here `ash_history` will match both `bash_history` and `ash_history`
- macro: modify_shell_history
condition: >
(modify and (
evt.arg.name contains "bash_history" or
evt.arg.name endswith "ash_history" or
evt.arg.name endswith "zsh_history" or
evt.arg.name contains "fish_read_history" or
evt.arg.name endswith "fish_history" or
evt.arg.oldpath contains "bash_history" or
evt.arg.oldpath endswith "ash_history" or
evt.arg.oldpath endswith "zsh_history" or
evt.arg.oldpath contains "fish_read_history" or
evt.arg.oldpath endswith "fish_history" or
evt.arg.path contains "bash_history" or
evt.arg.path endswith "ash_history" or
evt.arg.path endswith "zsh_history" or
evt.arg.path contains "fish_read_history" or
evt.arg.path endswith "fish_history"))

# here `ash_history` will match both `bash_history` and `ash_history`
- macro: truncate_shell_history
condition: >
(open_write and (
fd.name contains "bash_history" or
fd.name endswith "ash_history" or
fd.name endswith "zsh_history" or
fd.name contains "fish_read_history" or
fd.name endswith "fish_history") and evt.arg.flags contains "O_TRUNC")
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