Versions (4)
Version DetailsCurrent
Rev: 1 • May 25, 2022, 12:00 PMET INFO Possible JARM Fingerprinting Client Hello via tls1_2_top_half
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Possible JARM Fingerprinting Client Hello via tls1_2_top_half"; flow:established,to_client; tls.version:1.2; content:"|c0 12 c0 07 cc 14 13 01 13 02 cc a9 c0 73 c0 72 c0 2c c0 af c0 ad c0 24 c0 0a c0 2b c0 ae c0 ac c0 23 c0 09 c0 08 00 9a 00 c4 00 88 00 be 00 45 00 9f c0 a3 c0 9f 00 6b 00 39 00 9e c0 a2 c0 9e 00 67 00 33 00 16|"; fast_pattern; content:"|08|http/0.9|08|http/1.0|08|http/1.1|06|spdy/1|06|spdy/2|06|spdy/3|02|h2|03|h2c|02|hq"; reference:url,engineering.salesforce.com/easily-identify-malicious-servers-on-the-internet-with-jarm-e095edac525a; classtype:misc-activity; sid:2036692; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_05_25, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_25;)
May 25, 2022, 12:00 PM
May 25, 2022, 12:00 PM
Sep 21, 2024, 3:00 AM
Nov 17, 2025, 10:34 PM
rules/emerging-info.rules