""ET INFO Possible Malicious Document Request to ChangeIP Dynamic DNS Domain""
SID: 2030508
Revision: 2
Class Type: misc-activity
Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_07_14, deployment Perimeter, signature_severity Informational, updated_at 2020_07_14
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: to_server,established
Contents:
- Value: "User-Agent|3a 20|Microsoft Office Existence Discovery|0d 0a|"
Within:
PCRE: "/.(?:m(?:y(?:p(?:op3.(?:net|org)|icture.info)|n(?:etav.(?:net|org)|umber.org)|(?:secondarydns|lftv|03).com|d(?:ad.info|dns.com)|ftp.(?:info|name)|(?:mom|z).info|www.biz)|(?:r(?:b(?:asic|onus)|(?:slov|fac)e)|efound).com|oneyhome.biz)|d(?:yn(?:amicdns.(?:(?:org|co|me).uk|biz)|dns.pro|ssl.com)|ns(?:(?:-(?:stuff|dns)|0[45]|et|rd).com|[12].us)|dns.(?:m(?:e.uk|obi|s)|info|name|us)|(?:smtp|umb1).com|hcp.biz)|(?:j(?:u(?:ngleheart|stdied)|etos|kub)|y(?:ou(?:dontcare|rtrap)|gto)|4(?:mydomain|dq|pu)|q(?:high|poe)|2(?:waky|5u)|z(?:yns|zux)|vizvaz|1dumb).com|s(?:e(?:(?:llclassics|rveusers?|ndsmtp).com|x(?:idude.com|xxy.biz))|quirly.info|sl443.org|ixth.biz)|o(?:n(?:mypc.(?:info|biz|net|org|us)|edumb.com)|(?:(?:urhobb|cr)y|rganiccrap|tzo).com)|f(?:ree(?:(?:ddns|tcp).com|www.(?:info|biz))|a(?:qserv|rtit).com|tp(?:server|1).biz)|a(?:(?:(?:lmostm|cmeto)y|mericanunfinished).com|uthorizeddns.(?:net|org|us))|n(?:s(?:0(?:1.(?:info|biz|us)|2.(?:info|biz|us))|[123].name)|inth.biz)|c(?:hangeip.(?:n(?:ame|et)|org)|leansite.(?:info|biz|us)|ompress.to)|i(?:(?:t(?:emdb|saol)|nstanthq|sasecret|kwb).com|ownyour.(?:biz|org))|g(?:r8(?:domain|name).biz|ettrials.com|ot-game.org)|l(?:flink(?:up.(?:com|net|org)|.com)|ongmusic.com)|t(?:o(?:ythieves.com|h.info)|rickip.(?:net|org))|(?:undefineddynamic-dns|rebatesrule|3-a).net|x(?:x(?:xy.(?:info|biz)|uz.com)|24hr.com)|p(?:canywhere.net|roxydns.com|ort25.biz)|w(?:ww(?:host|1).biz|ikaba.com|ha.la)|e(?:(?:smtp|dns).biz|zua.com|pac.to)|https443.(?:net|org)|bigmoney.biz)(?:\x3a\d{1,5})?$/Hm"
Special Options:
- http_header