ET MALWARE Various Ransomware/Stealer Style External IP Address Check (myip .ch)

Query · suricata

flow:established,to_server;
http.start;
content:"GET|20|/|20|HTTP/1.1|0d 0a|Host|3a 20|www.myip.ch|0d 0a|Accept|3a 20|*/*|0d 0a|"; bsize:50; fast_pattern;
http.header_names;
content:!"User-Agent";
content:!"Referer";
Raw source ET MALWARE Various Ransomware/Stealer Style External IP Address Check (myip .ch) · 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 Various Ransomware/Stealer Style External IP Address Check (myip .ch)";
    flow:established,to_server;
    http.start;
    content:"GET|20|/|20|HTTP/1.1|0d 0a|Host|3a 20|www.myip.ch|0d 0a|Accept|3a 20|*/*|0d 0a|"; bsize:50; fast_pattern;
    http.header_names;
    content:!"User-Agent";
    content:!"Referer";
    reference:md5,c596d787d0848722d393a4a5945b3e15;
    classtype:trojan-activity;
    sid:2029933; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_04_20, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_21, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)

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