alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Ursnif Variant CnC? Beacon"; flow:established,to_server; urilen:>125; content:"GET"; http_method; content:"/images/"; http_uri; fast_pattern; content:".gif"; distance:100; http_uri; content:!"Accept"; http_header; content:!"Referer|3a|"; http_header; pcre:"/\/images(?:\/[a-zA-Z0-9_]+)+\.gif$/U"; pcre:"/^User-Agent\x3a\x20(?:Mozilla\/|Shockwave)/Hmi"; reference:md5,f48f626cf746a2c3c73182c752c481b6; reference:md5,8ab21ac9199d3ced2230924b90f49f0d; classtype:trojan-activity; sid:2021813; rev:6; metadata:attack_target Client_Endpoint, created_at 2015_09_22, deployment Perimeter, former_category MALWARE, signature_severity Major, tag c2, updated_at 2020_07_27, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)

Added 2021-06-18 18:19:29 UTC


alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Ursnif Variant CnC? Beacon"; flow:established,to_server; urilen:>125; content:"GET"; http_method; content:"/images/"; http_uri; fast_pattern; content:".gif"; distance:100; http_uri; content:!"Accept"; http_header; content:!"Referer|3a|"; http_header; pcre:"/\/images(?:\/[a-zA-Z0-9_]+)+\.gif$/U"; pcre:"/^User-Agent\x3a\x20(?:Mozilla\/|Shockwave)/Hmi"; reference:md5,f48f626cf746a2c3c73182c752c481b6; reference:md5,8ab21ac9199d3ced2230924b90f49f0d; classtype:trojan-activity; sid:2021813; rev:6; metadata:created_at 2015_09_22, former_category MALWARE, updated_at 2020_07_27;)

Added 2020-08-05 19:11:40 UTC


alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Ursnif Variant CnC? Beacon"; flow:established,to_server; urilen:>125; content:"GET"; http_method; content:"/images/"; http_uri; fast_pattern; content:".gif"; distance:100; http_uri; content:!"Accept"; http_header; content:!"Referer|3a|"; http_header; pcre:"/\/images(?:\/[a-zA-Z0-9_]+)+\.gif$/U"; pcre:"/^User-Agent\x3a\x20(?:Mozilla\/|Shockwave)/Hmi"; metadata: former_category MALWARE; reference:md5,f48f626cf746a2c3c73182c752c481b6; reference:md5,8ab21ac9199d3ced2230924b90f49f0d; classtype:trojan-activity; sid:2021813; rev:6; metadata:created_at 2015_09_22, updated_at 2020_07_27;)

Added 2020-07-27 19:03:45 UTC


alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Ursnif Variant CnC? Beacon"; flow:established,to_server; urilen:>125; content:"GET"; http_method; content:"/images/"; http_uri; fast_pattern; content:".gif"; distance:100; http_uri; content:!"Accept"; http_header; content:!"Referer|3a|"; http_header; pcre:"/\/images(?:\/[a-zA-Z0-9_]+)+\.gif$/U"; pcre:"/^User-Agent\x3a\x20(?:Mozilla\/|Shockwave)/Hmi"; metadata: former_category MALWARE; reference:md5,f48f626cf746a2c3c73182c752c481b6; reference:md5,8ab21ac9199d3ced2230924b90f49f0d; classtype:trojan-activity; sid:2021813; rev:6; metadata:created_at 2015_09_22, updated_at 2015_09_22;)

Added 2019-09-19 19:26:28 UTC


alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Ursnif Variant CnC? Beacon"; flow:established,to_server; urilen:>125; content:"GET"; http_method; content:"/images/"; http_uri; fast_pattern; content:".gif"; distance:100; http_uri; content:!"Accept"; http_header; content:!"Referer|3a|"; http_header; pcre:"/\/images(?:\/[a-zA-Z0-9_]+)+\.gif$/U"; pcre:"/^User-Agent\x3a\x20(?:Mozilla\/|Shockwave)/Hmi"; reference:md5,f48f626cf746a2c3c73182c752c481b6; reference:md5,8ab21ac9199d3ced2230924b90f49f0d; classtype:trojan-activity; sid:2021813; rev:6; metadata:created_at 2015_09_22, updated_at 2015_09_22;)

Added 2018-09-13 19:51:43 UTC


Added 2018-09-13 18:00:24 UTC


alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Ursnif Variant CnC? Beacon"; flow:established,to_server; urilen:>125; content:"GET"; http_method; content:"/images/"; http_uri; fast_pattern; content:".gif"; distance:100; http_uri; content:!"Accept"; http_header; content:!"Referer|3a|"; http_header; pcre:"/\/images(?:\/[a-zA-Z0-9_]+)+\.gif$/U"; pcre:"/^User-Agent\x3a\x20(?:Mozilla\/|Shockwave)/Hmi"; reference:md5,f48f626cf746a2c3c73182c752c481b6; reference:md5,8ab21ac9199d3ced2230924b90f49f0d; classtype:trojan-activity; sid:2021813; rev:6; metadata:created_at 2015_09_22, updated_at 2015_09_22;)

Added 2017-08-07 21:16:34 UTC


alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Ursnif Variant CnC? Beacon"; flow:established,to_server; urilen:>125; content:"GET"; http_method; content:"/images/"; http_uri; fast_pattern; content:".gif"; distance:100; http_uri; content:!"Accept"; http_header; content:!"Referer|3a|"; http_header; pcre:"/\/images(?:\/[a-zA-Z0-9_]+)+\.gif$/U"; pcre:"/^User-Agent\x3a\x20(?:Mozilla\/|Shockwave)/Hmi"; reference:md5,f48f626cf746a2c3c73182c752c481b6; reference:md5,8ab21ac9199d3ced2230924b90f49f0d; classtype:trojan-activity; sid:2021813; rev:6;)

Added 2016-09-16 17:24:00 UTC


alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Ursnif Variant CnC? Beacon"; flow:established,to_server; urilen:>125; content:"GET"; http_method; content:"/images/"; http_uri; fast_pattern; content:".gif"; distance:100; http_uri; content:!"Accept"; http_header; content:!"Referer|3a|"; http_header; content:"User-Agent|3a 20|Mozilla/"; http_header; pcre:"/\/images(?:\/[a-zA-Z0-9_]+)+\.gif$/U"; reference:md5,f48f626cf746a2c3c73182c752c481b6; reference:md5,8ab21ac9199d3ced2230924b90f49f0d; classtype:trojan-activity; sid:2021813; rev:5;)

Added 2016-07-13 19:53:28 UTC


alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Ursnif Variant CnC? Beacon"; flow:established,to_server; urilen:>125; content:"GET"; http_method; content:"/images/"; http_uri; fast_pattern; content:".gif"; distance:100; http_uri; content:!"Accept"; http_header; content:!"Referer|3a|"; http_header; content:"User-Agent|3a 20|Mozilla/"; depth:20; http_header; pcre:"/\/images(?:\/[a-zA-Z0-9_]+)+\.gif$/U"; reference:md5,f48f626cf746a2c3c73182c752c481b6; reference:md5,8ab21ac9199d3ced2230924b90f49f0d; classtype:trojan-activity; sid:2021813; rev:3;)

Added 2015-09-23 18:25:19 UTC


alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Win32/PSW.Papras Variant CnC? Beacon"; flow:established,to_server; urilen:>125; content:"GET"; http_method; content:"/images/"; http_uri; fast_pattern; content:".gif"; distance:100; http_uri; content:!"Accept"; http_header; content:!"Referer|3a|"; http_header; content:"User-Agent|3a 20|Mozilla/"; depth:20; http_header; pcre:"/\/images(?:\/[a-zA-Z0-9_]+)+\.gif$/U"; reference:md5,f48f626cf746a2c3c73182c752c481b6; reference:md5,8ab21ac9199d3ced2230924b90f49f0d; classtype:trojan-activity; sid:2021813; rev:3;)

Added 2015-09-22 17:50:33 UTC


Topic revision: r1 - 2021-06-18 - TWikiGuest
 
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