Summary (Bottom Line Up Front)
Threat actor at IP 183.89.229.229 conducted intensive SMB reconnaissance against network infrastructure on March 26, 2026, generating 4,368 events over approximately one hour targeting SMB services. Assessment indicates MEDIUM threat level focused on vulnerability discovery and potential exploitation preparation. Immediate SMB hardening and monitoring enhancement recommended.
Activity Timeline
INITIAL REPORT2026-03-26T15:07:29Z
Source: Analyst Manual Entry
Threat actor at IP 183.89.229.229 conducted intensive SMB reconnaissance against network infrastructure on March 26, 2026, generating 4,368 events over approximately one hour targeting SMB services. Assessment indicates MEDIUM threat level focused on vulnerability discovery and potential exploitation preparation. Immediate SMB hardening and monitoring enhancement recommended.
Technical details
- Attack Vector: SMB protocol exploitation attempts with focus on SMBv1 detection
- Volume: 4,368 total events concentrated within 1-hour window (09:00-11:00 UTC)
- Primary Technique: SMB_EXPLOIT_PROBE with 1,431 SMBv1 detection attempts
- Protocols Observed: SMB, TCP, TCP/SYN scanning
- MITRE ATT&CK Mapping: T1046 (Network Service Scanning), T1021.002 (Remote Services: SMB/Windows Admin Shares)
- IOC: 183.89.229.229 (source IP)
- Targeting: Single destination port indicating focused reconnaissance
- Attribution Confidence: Low (insufficient geolocation and infrastructure data)
IOCs
IP:183.89.229.229
Recommendations
- Immediately disable SMBv1 protocol across all Windows systems and network shares
- Implement network segmentation to restrict SMB traffic to authorized subnets only
- Deploy enhanced monitoring for SMB connection attempts from external IP ranges
- Conduct vulnerability assessment of all SMB-enabled systems for known exploits
- Block IP 183.89.229.229 at perimeter firewalls and update threat intelligence feeds