""ET INFO Suspicious Empty SSL Certificate - Observed in Cobalt Strike""
SID: 2023629
Revision: 3
Class Type: trojan-activity
Metadata: affected_product Any, attack_target Client_Endpoint, created_at 2016_10_24, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2022_03_24
Reference:
Protocol: tcp
Source Network: $EXTERNAL_NET
Source Port: any
Destination Network: $HOME_NET
Destination Port: any
Flow: from_server,established
Contents:
- Value: "|31 09 30 07 06 03 55 04 06 13 00 31 09 30 07 06 03 55 04 08 13 00 31 09 30 07 06 03 55 04 07 13 00 31 09 30 07 06 03 55 04 0a 13 00 31 09 30 07 06 03 55 04 0b 13 00 31 09 30 07 06 03 55 04 03 13 00|"
Within:
PCRE:
Special Options:
- fast_pattern