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143.137.159.15 has a threat confidence score of 78%. This IP address from Brazil (AS263099, STIW Sistema de Telecom. Inf e Wireless LTDA) has been observed in 11 honeypot sessions targeting SMB protocols. Detected attack patterns include smb remote service stager via mshta. First observed on March 23, 2026, most recently active March 23, 2026.
Composite behavior indicating remote lateral movement over SMB followed by service-based execution of a staged payload delivered through mshta invoking msiexec from remote infrastructure. The sequence combines IPC$ share access, SAMR and SVCCTL RPC binding, service control pipe interaction, and remote command execution consistent with administrative service creation or modification to execute a downloaded installer. This pattern is strongly associated with hands-on-keyboard intrusion activity and automated lateral propagation frameworks leveraging Windows service execution for payload deployment.