ET MALWARE TA452 Related Backdoor Activity (POST)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE TA452 Related Backdoor Activity (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/get"; bsize:4;
    http.header_names;
    content:"|0d 0a|UserAgent|0d 0a|Host|0d 0a|Content-Length|0d 0a|Expect|0d 0a|"; startswith; fast_pattern;
    reference:md5,a3c14604fb4454ba5722f07f89780e73;
    reference:md5,c3aedb781a5b96674764cd43ef076d10;
    reference:url,twitter.com/StopMalvertisin/status/1562896289981136898;
    reference:url,www.safebreach.com/resources/blog/safebreach-labs-researchers-uncover-new-fully-undetectable-powershell-backdoor/;
    classtype:trojan-activity;
    sid:2039514; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_10_24, deployment Perimeter, malware_family TA452, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_10_24;
)