Versions (2)
Version DetailsCurrent
Rev: 1 • May 6, 2025, 12:00 PMET MALWARE Observed BlackByte Domain (myvisit .alteksecurity .org in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed BlackByte Domain (myvisit .alteksecurity .org in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".myvisit.alteksecurity.org"; endswith; fast_pattern; reference:url,www.microsoft.com/en-us/security/blog/2023/07/06/the-five-day-job-a-blackbyte-ransomware-intrusion-case-study/; reference:md5,a114d698b40fb3b13c190f74d850e41d; classtype:trojan-activity; sid:2062139; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_05_06, deployment Perimeter, malware_family BlackByte, confidence High, signature_severity Major, tag AI_Generated_Description, updated_at 2025_05_06;)
May 6, 2025, 12:00 PM
May 6, 2025, 12:00 PM
May 6, 2025, 9:34 PM
Jun 16, 2025, 10:35 PM
rules/emerging-malware.rules