Crontab Enumeration
Detects usage of crontab to list the tasks of the user
Sigma rule (View on GitHub)
1title: Crontab Enumeration
2id: 403ed92c-b7ec-4edd-9947-5b535ee12d46
3status: test
4description: Detects usage of crontab to list the tasks of the user
5references:
6 - https://blogs.jpcert.or.jp/en/2023/05/gobrat.html
7 - https://jstnk9.github.io/jstnk9/research/GobRAT-Malware/
8 - https://www.virustotal.com/gui/file/60bcd645450e4c846238cf0e7226dc40c84c96eba99f6b2cffcd0ab4a391c8b3/detection
9 - https://www.virustotal.com/gui/file/3e44c807a25a56f4068b5b8186eee5002eed6f26d665a8b791c472ad154585d1/detection
10author: Joseliyo Sanchez, @Joseliyo_Jstnk
11date: 2023/06/02
12tags:
13 - attack.discovery
14 - attack.t1007
15logsource:
16 product: linux
17 category: process_creation
18detection:
19 selection:
20 Image|endswith: '/crontab'
21 CommandLine|contains: ' -l'
22 condition: selection
23falsepositives:
24 - Legitimate use of crontab
25level: low
References
-
JPCERT/CC has confirmed attacks that infected routers in Japan with malware around February 2023. This blog article explains the details of the attack confirmed by JPCERT/CC and GobRAT malware, which was used in the attack. ### Attack flow up to...
Read More -
-
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