Summary (Bottom Line Up Front)
Our sensors detected sustained RDP scanning activity from IP 88.47.170.77 (Milan, Italy) between March 29-April 4, 2026, generating over 132,000 events targeting RDP services. This activity is assessed as low-severity reconnaissance noise with medium confidence, consistent with opportunistic scanning rather than targeted operations. Network defenders should implement standard RDP hardening measures and monitor for follow-on authentication attempts.
Activity Timeline
UPDATE 12026-04-03T23:58:55Z
Source: Analyst Manual Entry
Our sensors detected sustained RDP scanning activity from IP 88.47.170.77 (Milan, Italy) between March 29-April 4, 2026, generating over 132,000 events targeting RDP services. This activity is assessed as low-severity reconnaissance noise with medium confidence, consistent with opportunistic scanning rather than targeted operations. Network defenders should implement standard RDP hardening measures and monitor for follow-on authentication attempts.
New findings
- Source: 88.47.170.77 (AS3269 PRESIDENT F.R.S SRL, Milan, Italy)
- Campaign Duration: March 29, 2026 06:00 - April 4, 2026 02:00 (6-day window)
- Attack Volume: 132,784 total events, primarily RDP scans with 28,245 x224_request patterns
- Protocols: RDP (3389/tcp), TCP reconnaissance on ports 22, 4443, 8181
- MITRE Techniques: T1018 (Remote System Discovery), T1021.001 (Remote Desktop Protocol)
- Kill Chain Phase: Reconnaissance
- IOCs: 88.47.170.77 (AbuseIPDB score: 13/100, no VPN detected)
Recommendations
- Implement network-level blocking of 88.47.170.77 and monitor for additional scanning from AS3269 netblocks
- Enforce multi-factor authentication on all RDP services and restrict RDP access to authorized IP ranges only
- Deploy RDP connection rate limiting and account lockout policies to mitigate brute force attempts
- Monitor authentication logs for failed RDP login attempts from Italian IP ranges in the coming 72 hours
- Consider moving RDP services to non-standard ports and implementing VPN-only access for remote administration
INITIAL REPORT2026-04-01T08:05:57Z
Source: Analyst Manual Entry
IP address 88.47.170.77 conducted sustained RDP reconnaissance activity against network infrastructure from March 29-April 1, 2026, generating over 46,000 scanning events targeting port 3389. This represents medium-severity threat activity consistent with initial reconnaissance phases of RDP-based attack campaigns. Immediate blocking of this IP address is recommended to prevent potential escalation to credential brute-forcing or exploitation attempts.
Technical details
- Attack Vector: RDP scanning via X.224 connection requests on port 3389
- Volume: 46,233 events over 4-day period (March 29 06:00 - April 1 10:00, 2026)
- MITRE Technique: T1021.001 (Remote Desktop Protocol)
- Kill Chain Phase: Reconnaissance
- Primary IOC: 88.47.170.77 (unknown ASN/geolocation)
- Notable Artifact: Suspicious cookie containing IP address [SENSOR-IP] observed in RDP handshake traffic
- Attack Pattern: Standard RDP enumeration behavior with 14,949 X.224 request attempts
IOCs
IP:88.47.170.77
Recommendations
- Block IP address 88.47.170.77 at network perimeter and endpoint firewalls immediately
- Review RDP exposure and implement network segmentation to limit RDP access to authorized networks only
- Enable RDP connection logging and monitor for follow-on brute-force attempts from related IP ranges
- Implement account lockout policies and multi-factor authentication for all RDP-accessible accounts
- Consider investigating potential relationship between source IP 88.47.170.77 and embedded IP [SENSOR-IP] for campaign attribution