""ET INFO Terse Request to note .youdao .com - Possible Download""

SID: 2035681

Revision: 2

Class Type: misc-activity

Metadata: attack_target Client_Endpoint, created_at 2022_03_30, deployment Perimeter, deployment SSLDecrypt, performance_impact Moderate, signature_severity Informational, updated_at 2022_03_31

Reference:

• Link

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: any

Flow: established,to_server

Contents:

• Value: "GET"

• Value: "/yws/api/personal/file/"

• Value: "?method=download&shareKey="

• Value: "Host|3a 20|note.youdao.com|0d 0a|"

• Value: !"Referer|3a 20|"

Within:

PCRE: "/^User-Agent\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+[\r\n]+$/Hmi"

Special Options:

• http_method

• http_uri

• http_uri

• fast_pattern

• http_header

• http_header

source