alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA471/UNC2589 Related Activity (GET)"; flow:established,to_server; urilen:2; http.method; content:"GET"; http.uri; pcre:"/^\/[a-z]$/"; http.user_agent; content:"-hobot-"; bsize:7; fast_pattern; http.accept_enc; content:"gzip"; bsize:4; http.header_names; content:!"Referer"; reference:md5,1b161170a6b025b3f44746e20afd130f; reference:url,www.sentinelone.com/blog/threat-actor-uac-0056-targeting-ukraine-with-fake-translation-software/; classtype:trojan-activity; sid:2035531; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_03_18, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_18;)