ET MALWARE [PTsecurity] Trojan.Downloader VBA Script obfuscation (binary_getter)

Query · suricata

flow:established,to_client;
threshold:type limit, track by_src, count 1, seconds 30;
http.stat_code;
content:"200";
file.data;
content:"(Chr((((asc(Mid("; depth:300;
content:",1,1))-65))*25+(asc(Mid("; within:100;
content:",2,1))-65)-"; within:100;
Raw source ET MALWARE [PTsecurity] Trojan.Downloader VBA Script obfuscation (binary_getter) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE [PTsecurity] Trojan.Downloader VBA Script obfuscation (binary_getter)";
    flow:established,to_client;
    threshold:type limit, track by_src, count 1, seconds 30;
    http.stat_code;
    content:"200";
    file.data;
    content:"(Chr((((asc(Mid("; depth:300;
    content:",1,1))-65))*25+(asc(Mid("; within:100;
    content:",2,1))-65)-"; within:100;
    reference:md5,bad07f85a7baaeaa8aeb72997712aa98;
    classtype:trojan-activity;
    sid:2025202; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_01_16, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_24;
)

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