alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA453/CharmingKitten HYPERSCRAPE Tool Check-in Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.request_line; content:"?Ck=OK HTTP/1.1"; fast_pattern; endswith; http.header_names; bsize:39; content:"|0d 0a|Host|0d 0a|Accept-Encoding|0d 0a|Connection|0d 0a 0d 0a|"; reference:url,blog.google/threat-analysis-group/new-iranian-apt-data-extraction-tool/; reference:md5,5c91c1d833173f6ae599ef1d4133f235; reference:md5,10f5561b7515bc0d66916bef04b63dae; classtype:trojan-activity; sid:2038594; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_08_23, deployment Perimeter, malware_family TA453, malware_family APT35, malware_family CharmingKitten, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_03;)