Summary (Bottom Line Up Front)
IP address 85.11.183.27 conducted a sustained reconnaissance campaign from March 2026 through April 2026, targeting network infrastructure management interfaces including Palo Alto Networks PAN-OS, FortiGate, and MQTT services across 56 events. This activity represents initial attack chain reconnaissance with MEDIUM threat assessment and 85% confidence. Organizations should immediately audit exposed management interfaces and implement enhanced monitoring for follow-up exploitation attempts. ##
Activity Timeline
UPDATE 12026-04-19T08:34:36Z
Source: Analyst Manual Entry
IP address 85.11.183.27 conducted a sustained reconnaissance campaign from March 2026 through April 2026, targeting network infrastructure management interfaces including Palo Alto Networks PAN-OS, FortiGate, and MQTT services across 56 events. This activity represents initial attack chain reconnaissance with MEDIUM threat assessment and 85% confidence. Organizations should immediately audit exposed management interfaces and implement enhanced monitoring for follow-up exploitation attempts.
New findings
Attack Profile: 46-day reconnaissance campaign (March 4 - April 19, 2026) targeting 8 unique destination ports using HTTP/HTTPS protocols and TLS handshakes. Primary techniques include Active Scanning: Scanning IP Blocks (T1595.002) focusing on network device management interfaces. Attack patterns show MQTT service probing (7 hits), FortiGate login page enumeration (6 hits), and PAN-OS management interface reconnaissance (2 hits). Key indicators include requests to `/php/login.php` on port 4443/HTTPS and Chrome 140.0 user agent strings targeting management ports 443 and 8443. Source IP shows no VPN/proxy usage with unknown geolocation and ASN data, suggesting potential infrastructure obfuscation.
Recommendations
- Immediately audit and restrict access to management interfaces on ports 443, 4443, and 8443, ensuring they are not exposed to untrusted networks
- Implement enhanced logging and monitoring for authentication attempts against PAN-OS, FortiGate, and MQTT services, particularly focusing on the observed URI patterns
- Deploy network segmentation to isolate management interfaces from internet-facing networks and require VPN access for administrative functions
- Review and harden default configurations on network infrastructure devices, disabling unnecessary services and changing default credentials
- Establish baseline monitoring for reconnaissance patterns targeting multiple device types to detect similar multi-vector campaigns in early stages
INITIAL REPORT2026-03-30T15:54:15Z
Source: Analyst Manual Entry
IP address 85.11.183.27 conducted low-volume reconnaissance scans targeting FortiGate login pages over a 22-day period from March 4-26, 2026. Assessment indicates LOW threat level with limited attack sophistication and no evidence of successful exploitation. Network defenders should monitor for similar reconnaissance patterns and implement standard hardening measures for FortiGate devices.
Technical details
- Attack Vector: HTTP/HTTPS reconnaissance targeting FortiGate login interfaces
- Volume: 56 events across 22 days, targeting 5 unique destination ports
- Protocols: HTTP, HTTPS, TLS 1.0, TCP SYN scanning
- Primary Technique: FORTI_RECON pattern with 3 confirmed FortiGate login page probes
- Attribution: Unknown threat actor, no VPN/proxy usage detected
- IOC: 85.11.183.27 (no reverse DNS resolution)
- MITRE Mapping: Insufficient data for technique classification
IOCs
IP:85.11.183.27
Recommendations
- Monitor network logs for additional reconnaissance attempts against FortiGate management interfaces from related IP ranges
- Ensure FortiGate devices have administrative access restricted to authorized management networks only
- Implement rate limiting and account lockout policies on FortiGate authentication interfaces
- Verify FortiGate firmware is current and disable unnecessary services on external-facing interfaces
- Consider blocking 85.11.183.27 if FortiGate devices are present in your environment