""ET TROJAN ELF/Mirai Variant UA Outbound (Yowai)""
SID: 2027123
Revision: 2
Class Type: trojan-activity
Metadata: attack_target IoT, created_at 2019_03_27, deployment Perimeter, malware_family Mirai, performance_impact Low, signature_severity Major, updated_at 2019_03_27
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|Yowai"
Within:
PCRE: "/User-Agent\x3a\x20Yowai(?:\/[0-9].0)?\r\n/Hi"
Special Options:
-
http_header
-
nocase
-
fast_pattern