ET MALWARE ACR Stealer Data Exfiltration Attempt M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE ACR Stealer Data Exfiltration Attempt M1";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:3;
    content:"/Up";
    http.content_type; bsize:39;
    content:"application/octet-stream|3b 20|boundary|3d 2d 2d 2d 2d|";
    http.user_agent; bsize:9;
    content:"MyApp/1.0"; fast_pattern;
    http.request_body;
    content:"PK|03 04 14|"; startswith;
    pcre:"/[a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12}\.txt/R";
    reference:url,malpedia.caad.fkie.fraunhofer.de/details/win.acr_stealer;
    reference:url,threatfox.abuse.ch/browse/malware/win.acr_stealer/;
    classtype:trojan-activity;
    sid:2052675; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_05_16, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_05_16;
    target:src_ip;
)