alert tcp $EXTERNAL_NET any -> $HOME_NET 1024: (msg:"ET TROJAN Possible XServer Backdoor Certificate Observed"; flow:established,to_server; content:"|16|"; depth:1; content:"|55 04 06|"; distance:0; content:"|02|US|31|"; distance:1; within:4; content:"|55 04 08|"; distance:0; content:"|02|BA|31|"; distance:1; within:4; content:"|55 04 0a|"; distance:0; content:"|04|Root|31|"; distance:1; within:6; content:"|55 04 0b|"; distance:0; content:"|04|Root|31|"; distance:1; within:6; fast_pattern; content:"|55 04 03|"; distance:0; content:"|04|Root|30|"; distance:1; within:6; reference:url,resources.fox-it.com/rs/170-CAK-271/images/201912_Report_Operation_Wocao.pdf; classtype:trojan-activity; sid:2029190; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, deployment Perimeter, signature_severity Major, created_at 2019_12_23, updated_at 2019_12_23;)

Added 2019-12-23 19:12:44 UTC


Topic revision: r1 - 2019-12-24 - TWikiGuest
 
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