alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET TROJAN Observed Malicious SSL Cert (ServHelper? CnC?)"; flow:from_server,established; tls_cert_subject; content:"CN=dfsgu747hugr.pw"; nocase; fast_pattern; isdataat:!1,relative; tls_cert_issuer; content:"C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3"; classtype:trojan-activity; sid:2029612; rev:1; metadata:attack_target Client_and_Server, created_at 2020_03_11, deployment Perimeter, former_category MALWARE, malware_family ServHelper?, performance_impact Low, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2020_11_05, mitre_tactic_id TA0042, mitre_tactic_name Resource_Development, mitre_technique_id T1587, mitre_technique_name Develop_Capabilities;)

Added 2022-01-14 18:55:59 UTC

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET TROJAN Observed Malicious SSL Cert (ServHelper? CnC?)"; flow:from_server,established; tls_cert_subject; content:"CN=dfsgu747hugr.pw"; nocase; fast_pattern; isdataat:!1,relative; tls_cert_issuer; content:"C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3"; classtype:trojan-activity; sid:2029612; rev:1; metadata:created_at 2020_03_11, former_category MALWARE, malware_family ServHelper?, performance_impact Low, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2020_11_05;)

Added 2020-11-05 21:56:48 UTC

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET TROJAN Observed Malicious SSL Cert (ServHelper? CnC?)"; flow:from_server,established; tls_cert_subject; content:"CN=dfsgu747hugr.pw"; nocase; fast_pattern; isdataat:!1,relative; tls_cert_issuer; content:"C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3"; classtype:trojan-activity; sid:2029612; rev:1; metadata:created_at 2020_03_11, former_category MALWARE, malware_family ServHelper?, performance_impact Low, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2020_03_11;)

Added 2020-08-05 19:17:43 UTC

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET TROJAN Observed Malicious SSL Cert (ServHelper? CnC?)"; flow:from_server,established; tls_cert_subject; content:"CN=dfsgu747hugr.pw"; nocase; fast_pattern; isdataat:!1,relative; tls_cert_issuer; content:"C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3"; metadata: former_category MALWARE; classtype:trojan-activity; sid:2029612; rev:1; metadata:tag SSL_Malicious_Cert, signature_severity Major, created_at 2020_03_11, malware_family ServHelper?, performance_impact Low, updated_at 2020_03_11;)

Added 2020-03-12 00:25:50 UTC