Masquerading as Linux Crond Process
Masquerading occurs when the name or location of an executable, legitimate or malicious, is manipulated or abused for the sake of evading defenses and observation. Several different variations of this technique have been observed.
Sigma rule (View on GitHub)
1title: Masquerading as Linux Crond Process
2id: 9d4548fa-bba0-4e88-bd66-5d5bf516cda0
3status: test
4description: |
5 Masquerading occurs when the name or location of an executable, legitimate or malicious, is manipulated or abused for the sake of evading defenses and observation.
6 Several different variations of this technique have been observed.
7references:
8 - https://github.com/redcanaryco/atomic-red-team/blob/8a82e9b66a5b4f4bc5b91089e9f24e0544f20ad7/atomics/T1036.003/T1036.003.md#atomic-test-2---masquerading-as-linux-crond-process
9author: Timur Zinniatullin, oscd.community
10date: 2019/10/21
11modified: 2023/08/22
12tags:
13 - attack.defense_evasion
14 - attack.t1036.003
15logsource:
16 product: linux
17 service: auditd
18detection:
19 selection:
20 type: 'execve'
21 a0: 'cp'
22 a1: '/bin/sh'
23 a2|endswith: '/crond'
24 condition: selection
25level: medium
References
Related rules
- Potential Defense Evasion Via Binary Rename
- Ps.exe Renamed SysInternals Tool
- Potential Homoglyph Attack Using Lookalike Characters
- Processes Executing with Unusual Command Lines (RedCanary Threat Detection Report)
- Unexpected Internal Process Name (RedCanary Threat Detection Report)