ET HUNTING Suspicious Zipped Filename in Outbound POST Request (Steam_htmlcache.txt)
Sourceet/open
CreatedJune 22, 2022
UpdatedAugust 22, 2023
Classificationtrojan-activity
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Suspicious Zipped Filename in Outbound POST Request (Steam_htmlcache.txt)"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"PK|03 04|"; byte_test:1,<=,20,0,relative; content:"Steam_htmlcache.txt"; distance:0; nocase; fast_pattern; classtype:trojan-activity; sid:2037091; rev:4; metadata:attack_target Client_Endpoint, created_at 2022_06_22, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Stealer, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_22, reviewed_at 2024_04_17;)
Metadata
attack targetClient_Endpoint
created at2022_06_22
deploymentPerimeter
performance impactLow
confidenceMedium
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2023_08_22
reviewed at2024_04_17
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