alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET 1024: (msg:"ET MALWARE Win32/Chifrax.a CnC Exfil via TCP"; flow:established,to_server; content:"|7c|"; offset:1; depth:1; content:"|7c|0x6F6E6C696E657C"; distance:3; within:17; fast_pattern; pcre:"/^(?:(?:[0-9]{1})\x7c(?:[0-9]{3})\x7c0x6F6E6C696E657C)/"; reference:url,twitter.com/Jane_0sint/status/1701545803741905182; reference:md5,af090e363e79628671faf1b0a98587aa; classtype:trojan-activity; sid:2048043; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_09_12, deployment Perimeter, malware_family Win32_Chifrax_a, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_12, reviewed_at 2023_09_12;)