Rule History

SID: 2057635 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 1 • Nov 15, 2024, 12:00 PM

Message:

ET MALWARE Reverse Base64 Encoded MZ Header Payload Inbound

Rule:

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Reverse Base64 Encoded MZ Header Payload Inbound"; flow:established,to_client; content:"AAAAEAAAAMAAQqVT"; endswith; reference:md5,ed54f068782aaff84dce2776a3ffbd73; classtype:trojan-activity; sid:2057635; 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_11_15, deployment Perimeter, deployment SSLDecrypt, malware_family ReverseLoader, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_11_18;)

Created:

Nov 15, 2024, 12:00 PM

Updated:

Nov 18, 2024, 12:00 PM

DB Created:

Dec 3, 2024, 4:00 PM

DB Updated:

Jul 8, 2025, 9:34 PM

Filename:

rules/emerging-malware.rules