Detects overwriting (effectively wiping/deleting) of a file.
Description
Detects overwriting (effectively wiping/deleting) of a file.
Query · wazuh
field audit.execve.a0="dd" AND field audit.execve.a1="if=/dev/null|if=/dev/zero"
No license declared
socfortress/Wazuh-Rules publishes no license, and without an express grant the default is all rights reserved. The query above is synthesized from the rule rather than copied out of it, so you can see what the rule matches on; the rule as written stays upstream.
Read the full rule at Auditd/200110-auditd.xml ↗. Why this rule is treated this way.
Fires when
Wazuh evaluates a chain top-down. Every rule above this one must match on the same event before this rule is tested at all.
-
decoded_as=auditd-execve -
200124Adversaries may use binary padding to add junk data and change the on-disk representation of malware. This rule detect using dd and truncate to add a junk data to file. anchor level 12field audit.execve.a0="dd" AND field audit.execve.a1="if=" -
field audit.execve.a0="dd" AND field audit.execve.a1="if=/dev/null|if=/dev/zero"