Rule History

SID: 2044843 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 1 • Mar 30, 2023, 12:00 PM

Message:

ET MALWARE OpcJacker HVNC Variant Magic Packet

Rule:

alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE OpcJacker HVNC Variant Magic Packet"; dsize:<40; flow:established,to_server; content:"|25 56 0a dc c6 3b 55 39 80 13 9e 97|"; fast_pattern; startswith; content:"|06 07|"; distance:4; within:6; content:"7.7"; distance:8; reference:url,www.trendmicro.com/en_us/research/23/c/new-opcjacker-malware-distributed-via-fake-vpn-malvertising.html; classtype:trojan-activity; sid:2044843; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_30, deployment Perimeter, malware_family HVNC, performance_impact Low, confidence High, signature_severity Major, tag HVNC, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_30; target:src_ip;)

Created:

Mar 30, 2023, 12:00 PM

Updated:

Mar 30, 2023, 12:00 PM

DB Created:

Mar 30, 2023, 9:00 PM

DB Updated:

Aug 25, 2025, 9:35 PM

Filename:

rules/emerging-malware.rules