""ET WEB_SERVER Generic Webshell Accessed on Internal Compromised Server""
SID: 2034440
Revision: 1
Class Type: web-application-attack
Metadata: attack_target Server, created_at 2021_11_12, deployment Perimeter, signature_severity Major, tag WebShell, updated_at 2021_11_12, mitre_tactic_id TA0003, mitre_tactic_name Persistence, mitre_technique_id T1505, mitre_technique_name Server_Software_Component
Reference:
Protocol: tcp
Source Network: $HTTP_SERVERS
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: any
Flow: established,to_client
Contents:
-
Value: "|2e|cmd|7b|background|2d|color|3a 23|000|3b|color|3a 23|FFF"
-
Value: "|3c|input|20|name|3d 27|postpass|27 20|type|3d 27|password|27 20|size|3d 27|22|27 3e 20 3c|input|20|type|3d 27|submit|27 20|value|3d|"
Within:
PCRE:
Special Options:
-
file_data
-
nocase
-
fast_pattern