""ET TROJAN Observed MSIL/Heracles Variant CnC Domain (stainless .fun in TLS SNI)""
SID: 2033593
Revision: 2
Class Type: trojan-activity
Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_07_28, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2021_07_28
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: 443
Flow: established,to_server
Contents:
-
Value: "|16|"
-
Value: "|01|"
-
Value: "|00 00 0d|stainless.fun"
Within: 8
PCRE:
Special Options:
- fast_pattern