""ET TROJAN Suspicious X-mailer Synapse Inbound to SMTP Server""
SID: 2021135
Revision: 1
Class Type: trojan-activity
Metadata: created_at 2015_05_21, updated_at 2015_05_21
Reference:
Protocol: tcp
Source Network: $EXTERNAL_NET
Source Port: any
Destination Network: $SMTP_SERVERS
Destination Port: [25,587]
Flow: established,to_server
Contents:
-
Value: "produced by Synapse"
-
Value: "X|2d|mailer|3a 20|Synapse|20 2d 20|Pascal TCP|2f|IP library by Lukas Gebauer"
Within:
PCRE:
Special Options: