ET MALWARE Possible MEME#4CHAN Exfil Activity

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/"; bsize:1;
http.content_type;
content:"application/x-www-form-urlencoded"; bsize:33;
http.content_len;
content:"5235"; bsize:4; fast_pattern;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE Possible MEME#4CHAN Exfil Activity · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Possible MEME#4CHAN Exfil Activity";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/"; bsize:1;
    http.content_type;
    content:"application/x-www-form-urlencoded"; bsize:33;
    http.content_len;
    content:"5235"; bsize:4; fast_pattern;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:url,securonix.com/blog/securonix-threat-labs-security-meme4chan-advisory/;
    reference:md5,df7148650d18ee87e9abe3abaa51e650;
    classtype:trojan-activity;
    sid:2046156; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_06_07, deployment Perimeter, malware_family Xworm, confidence Medium, signature_severity Major, tag MEME_4CHAN, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_07;
)

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