ET MALWARE Possible Upatre Downloader SSL certificate

Query · suricata

flow:established,from_server;
tls.certs;
content:"|2a 86 48 86 f7 0d 01 09 01|"; fast_pattern;
pcre:"/^.{2}(?P<fake_email>([asdfgh]+|[qwerty]+|[zxcvbn]+)\@([asdfgh]+|[qwerty]+|[zxcvbn]+)\.).+?\x2a\x86\x48\x86\xf7\x0d\x01\x09\x01.{2}(?P=fake_email)/Rs";
Raw source ET MALWARE Possible Upatre Downloader SSL certificate · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tls $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Possible Upatre Downloader SSL certificate";
    flow:established,from_server;
    tls.certs;
    content:"|2a 86 48 86 f7 0d 01 09 01|"; fast_pattern;
    pcre:"/^.{2}(?P<fake_email>([asdfgh]+|[qwerty]+|[zxcvbn]+)\@([asdfgh]+|[qwerty]+|[zxcvbn]+)\.).+?\x2a\x86\x48\x86\xf7\x0d\x01\x09\x01.{2}(?P=fake_email)/Rs";
    reference:url,blogs.technet.com/b/mmpc/archive/2013/10/31/upatre-emerging-up-d-at-er-in-the-wild.aspx;
    classtype:trojan-activity;
    sid:2017816; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2013_12_06, deployment Perimeter, malware_family Upatre, confidence Medium, signature_severity Critical, tag SSL_Malicious_Cert, tag Exploit_Kit, tag Downloader, tag Upatre, updated_at 2022_03_15;
)

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