Milad Cheraghi
c6b7a19b59
update: Local System Accounts Discovery - Linux - Add additional binaries to read password files such as "less" and "emacs" as well as additional password file locations such as "/etc/pwd.db"
53 lines
1.6 KiB
YAML
53 lines
1.6 KiB
YAML
title: Local System Accounts Discovery - Linux
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id: b45e3d6f-42c6-47d8-a478-df6bd6cf534c
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status: test
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description: Detects enumeration of local systeam accounts. This information can help adversaries determine which local accounts exist on a system to aid in follow-on behavior.
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references:
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- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1087.001/T1087.001.md
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- https://my.f5.com/manage/s/article/K589
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- https://man.freebsd.org/cgi/man.cgi?pwd_mkdb
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author: Alejandro Ortuno, oscd.community, CheraghiMilad
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date: 2020-10-08
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modified: 2024-12-10
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tags:
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- attack.discovery
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- attack.t1087.001
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logsource:
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category: process_creation
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product: linux
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detection:
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selection_1:
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Image|endswith: '/lastlog'
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selection_2:
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CommandLine|contains: '''x:0:'''
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selection_3:
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Image|endswith:
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- '/cat'
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- '/ed'
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- '/head'
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- '/more'
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- '/nano'
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- '/tail'
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- '/vi'
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- '/vim'
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- '/less'
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- '/emacs'
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- '/sqlite3'
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- '/makemap'
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CommandLine|contains:
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- '/etc/passwd'
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- '/etc/shadow'
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- '/etc/sudoers'
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- '/etc/spwd.db'
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- '/etc/pwd.db'
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- '/etc/master.passwd'
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selection_4:
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Image|endswith: '/id'
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selection_5:
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Image|endswith: '/lsof'
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CommandLine|contains: '-u'
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condition: 1 of selection*
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falsepositives:
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- Legitimate administration activities
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level: low
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