""ET INFO SMTP PDF Attachment Flowbit Set""

SID: 2024236

Revision: 2

Class Type: bad-unknown

Metadata: attack_target SMTP_Server, created_at 2017_04_21, deployment Perimeter, signature_severity Informational, updated_at 2017_04_21

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: any

Destination Network: $SMTP_SERVERS

Destination Port: [25,587]

Flow: established,from_server

Contents:

• Value: "|0d 0a 0d 0a|JVBERi"

Within:

PCRE:

Special Options:

source