""ET USER_AGENTS Observed Malicious User-Agent (Brute Force Attacks)""

SID: 2033314

Revision: 1

Class Type: bad-unknown

Metadata: created_at 2021_07_12, updated_at 2021_07_12

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "User-Agent|3a 20|Mozilla/5.0|20|(Windows|20|NT|20|10.0|3b 20|Win64|3b 20|x64)|20|AppleWebKit/537.36|20|(KHTML,|20|like|20|Gecko)|20|Chrome/70.|0d 0a|"

Within:

PCRE:

Special Options:

  • http_header

source