Versions (2)
Version DetailsCurrent
Rev: 2 • Feb 18, 2011, 12:00 PMET MALWARE IRS Inbound SMTP Malware
alert tcp $EXTERNAL_NET any -> $SMTP_SERVERS 25 (msg:"ET MALWARE IRS Inbound SMTP Malware"; flow:established,to_server; content:"Content-Disposition|3A| attachment|3b|"; nocase; content:"filename=|22|irs_legalauth-tax_payment_notice_"; nocase; content:".zip|22|"; nocase; classtype:trojan-activity; sid:2012319; rev:2; metadata:created_at 2011_02_18, signature_severity Major, updated_at 2019_07_26;)
Feb 18, 2011, 12:00 PM
Jul 26, 2019, 12:00 PM
Sep 21, 2024, 3:00 AM
May 30, 2025, 12:04 AM
rules/emerging-malware.rules