""ET WEB_SERVER Possible WebShell Access Inbound [upload] M1 (CISA AA21-259A)""
SID: 2034009
Revision: 2
Class Type: attempted-user
Metadata: attack_target Server, created_at 2021_09_22, deployment Perimeter, signature_severity Major, tag WebShell, updated_at 2021_09_22, mitre_tactic_id TA0003, mitre_tactic_name Persistence, mitre_technique_id T1505, mitre_technique_name Server_Software_Component
Reference:
Protocol: tcp
Source Network: any
Source Port: any
Destination Network: [$HOME_NET,$HTTP_SERVERS]
Destination Port: any
Flow: established,to_server
Contents:
-
Value: "GET"
-
Value: "?act=upload"
-
Value: "&path="
-
Value: "&context="
Within:
PCRE:
Special Options:
-
http_method
-
http_uri
-
fast_pattern
-
http_uri
-
http_uri