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Current context: 23 unresolved critical alerts · 11 active incidents · Anomaly score: 73/100

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Threat Analysis: 10.0.1.55 → 91.92.251.103:443

IOC Reputation Check:

- Listed in: Abuse.ch, Emerging Threats, MISP

- Associated with: **LockBit 3.0 C2 infrastructure**

- First seen: 2024-03-14 · Last seen: 2026-06-11

- ASN: AS49505 (Selectel LLC, Russia 🇷🇺)

Behavioral Analysis:

The 14.2 MB transfer over 12 minutes at a consistent ~20 KB/s rate is characteristic of **staged data exfiltration** or **ransomware encryption key exchange**. The low-and-slow transfer rate is a deliberate evasion technique to avoid bandwidth anomaly detection.

MITRE ATT&CK Mapping:

Risk Assessment: CRITICAL

This strongly indicates an active ransomware deployment in progress on host PROD-DB-04 (10.0.1.55).

Immediate Recommended Actions:

1. 🔴 Isolate PROD-DB-04 from network immediately

2. 🔴 Block 91.92.251.103 at perimeter firewall (all ports)

3. 🟡 Capture full PCAP of remaining session

4. 🟡 Initiate Ransomware Response Playbook RB-007

5. 🟢 Preserve memory dump before isolation

File Hash Analysis: `d4f8a2c1e9b3047a5f6d2e8c4b1a9f3e2`

VirusTotal / Threat Intel Result:

Capabilities Identified:

MITRE ATT&CK Mapping:

Verdict: ACTIVE RANSOMWARE PAYLOAD — CRITICAL INCIDENT

This confirms INC-2024-0847 is an active LockBit 3.0 deployment. The payload was likely dropped via the C2 channel we identified. Recommend immediate escalation to IR team lead.