/etc/prelude-lml/ruleset/su.rules is in prelude-lml 1.0.0-5.3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Logging succeed #
###################
regex=to root on; \
id=10003; \
assessment.impact.type=admin; \
target(0).user.user_id(0).number=0; \
chained; silent;
#LOG: Jul 18 17:12:49 hids su: afonyashin to root on /dev/ttyp0
#LOG: Jul 18 17:12:49 hids su: afonyashin to alice on /dev/ttyp0
optgoto=10003; regex=su: (\S+) to (\S+) on (\S+); \
classification.text=Credentials Change; \
id=10000; \
revision=1; \
analyzer(0).name=su; \
analyzer(0).class=Authentication; \
assessment.impact.completion=succeeded; \
assessment.impact.type=user; \
assessment.impact.severity=low; \
assessment.impact.description=User $1 authenticated to $2 successfully; \
source(0).user.category=os-device; \
source(0).user.user_id(0).type=current-user; \
source(0).user.user_id(0).name=$1; \
source(0).user.user_id(0).tty=$3; \
target(0).user.category=os-device; \
target(0).user.user_id(0).type=target-user; \
target(0).user.user_id(0).name=$2; \
last;
################
# Login failed #
################
#LOG: Jul 18 17:12:44 hids su: BAD SU afonyashin to root on /dev/ttyp0
#LOG: Jul 18 17:12:44 hids su: BAD SU afonyashin to alice on /dev/ttyp0
regex=su: BAD SU (\S+) to (\S+) on (\S+); \
classification.text=Credentials Change; optgoto=10003; \
id=10002; \
revision=1; \
analyzer(0).name=su; \
analyzer(0).class=Authentication; \
assessment.impact.completion=failed; \
assessment.impact.type=user; \
assessment.impact.severity=high; \
assessment.impact.description=User $1 tried to authenticate as $2 and failed; \
source(0).user.category=os-device; \
source(0).user.user_id(0).type=current-user; \
source(0).user.user_id(0).name=$1; \
source(0).user.user_id(0).tty=$3; \
target(0).user.category=os-device; \
target(0).user.user_id(0).type=target-user; \
target(0).user.user_id(0).name=$2; \
last;
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