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add new rule for password_group_discovery #5103
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add new rule for password_group_discovery #5103
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@@ -0,0 +1,27 @@ | |||
title: Detection of Password Groups Discovery |
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title: Detection of Password Groups Discovery | |
title: Potential Linux Groups Discovery |
Potential -> https://github.com/SigmaHQ/sigma-specification/blob/main/sigmahq/sigmahq-title-convention.md
I can't find anything better to match the 3 selection.
@@ -0,0 +1,27 @@ | |||
title: Detection of Password Groups Discovery | |||
id: 2b7d6524-c142-435a-ae96-be23543b9883 | |||
status: test |
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status: test | |
status: experimental |
https://github.com/SigmaHQ/sigma-specification/blob/main/sigmahq/sigmahq-rule-convention.md
Summary of the Pull Request
This rule detects adversaries attempting to discover group and permission settings. It looks for process execution related to
groups
,getent
, ornetstat
commands which could indicate an attempt to gather information on available user accounts and groups, including elevated permissions.groups log :
Dec 1 12:07:26 caldera-virtual-machine sysmon: 154100x8000000000000000286262Linux-Sysmon/Operationalcaldera-virtual-machine-2024-11-26 18:50:45.939{36fe7a82-1885-6746-91ce-8c4be7550000}19678/usr/bin/groups-----groups/tmpcaldera{36fe7a82-0000-0000-e803-000000000000}10003no levelSHA256=175a52497e658e138f7dce3fbb3ba7d794f302dc7be29f9c9ca79a8cb377554c{36fe7a82-1381-6743-d526-4b5458550000}2249/usr/bin/bashbashcaldera
netstat log:
Dec 1 12:08:55 caldera-virtual-machine sysmon: 154100x8000000000000000286269Linux-Sysmon/Operationalcaldera-virtual-machine-2024-11-26 18:52:15.275{36fe7a82-18df-6746-7d0c-f4aabf550000}19688/usr/bin/netstat-----netstat localgroup/tmpcaldera{36fe7a82-0000-0000-e803-000000000000}10003no levelSHA256=7af5f6cda055b65e31298fe20ed4456a87d2ca92803552bc0d3422f0e1a1fda1{36fe7a82-1381-6743-d526-4b5458550000}2249/usr/bin/bashbashcaldera
getent log:
Dec 1 12:08:30 caldera-virtual-machine sysmon: 154100x8000000000000000286268Linux-Sysmon/Operationalcaldera-virtual-machine-2024-11-26 18:51:50.183{36fe7a82-18c6-6746-6570-640d07560000}19682/usr/bin/getent-----getent group/tmpcaldera{36fe7a82-0000-0000-e803-000000000000}10003no levelSHA256=b8c45799a591949d1728e7177fa14ddb110102dfe20d7b3610ce7f448e7bb902{36fe7a82-1381-6743-d526-4b5458550000}2249/usr/bin/bashbashcaldera
pic of alert
Changelog
Example Log Event
Fixed Issues
SigmaHQ Rule Creation Conventions