Suspicious Child Process of SAP NetWeaver - Linux

 1title: Suspicious Child Process of SAP NetWeaver - Linux
 2id: 69dea60b-2deb-4c9e-a685-ad542f4367f9
 3status: experimental
 4description: |
 5    Detects suspicious child processes spawned by SAP NetWeaver on Linux systems that could indicate potential
 6    exploitation of vulnerability that allows arbitrary execution via webshells such as CVE-2025-31324.    
 7author: Elastic (idea), Swachchhanda Shrawan Poudel (Nextron Systems)
 8date: 2025-04-28
 9tags:
10    - attack.execution
11    - attack.initial-access
12    - attack.t1190
13    - attack.persistence
14    - attack.t1059.003
15    - cve.2025-31324
16    - detection.emerging-threats
17references:
18    - https://reliaquest.com/blog/threat-spotlight-reliaquest-uncovers-vulnerability-behind-sap-netweaver-compromise/
19    - https://onapsis.com/blog/active-exploitation-of-sap-vulnerability-cve-2025-31324/
20logsource:
21    category: process_creation
22    product: linux
23detection:
24    selection_parent_img:
25        ParentImage|contains:
26            - '/j2ee/cluster/apps/sap.com/irj/servlet_jsp/irj/work'
27            - '/j2ee/cluster/apps/sap.com/irj/servlet_jsp/irj/root'
28    selection_current_dict:
29        CurrentDirectory|contains:
30            - '/j2ee/cluster/apps/sap.com/irj/servlet_jsp/irj/work'
31            - '/j2ee/cluster/apps/sap.com/irj/servlet_jsp/irj/root'
32    selection_child:
33        Image|endswith:
34            - '/ash'
35            - '/bash'
36            - '/csh'
37            - '/dash'
38            - '/ksh'
39            - '/sh'
40            - '/tcsh'
41            - '/zsh'
42            - '/python'
43            - '/python2'
44            - '/python3'
45            - '/perl'
46            - '/ruby'
47            - '/curl'
48            - '/wget'
49            - '/nc'
50            - '/netcat'
51            - '/ncat'
52            - '/socat'
53            - '/nmap'
54            - '/telnet'
55            - '/awk'
56            - '/sed'
57    condition: (selection_parent_img or selection_current_dict) and selection_child
58falsepositives:
59    - Legitimate administrative activities such as software updates
60level: medium