alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Deep Panda CnC Check-In"; flow:established,to_server; content:"CGKU"; fast_pattern; offset:16; depth:4; content:"MB|00 00|"; distance:128; within:4; content:"Win|20|"; distance:24; within:4; reference:url,www.fortinet.com/blog/threat-research/deep-panda-log4shell-fire-chili-rootkits; reference:md5,0b991aca7e5124df471cf8fb9e301673; classtype:trojan-activity; sid:2035707; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2022_04_01, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_01;)