Executive Summary

• A low-severity Javascript file was delivered from an IP address in Spain (46.24.47.94).
• The file, while currently undetected by most AV vendors, has been flagged as potentially suspicious.
• The likely objective is reconnaissance or preparation for future malicious activity, although the current impact is minimal.
• The business risk level is considered low due to the file’s current behavior and limited scope.

Organizations should proactively monitor network traffic for unusual file transfers to mitigate future risks.

Observed Activity (SGI Sensors)

On November 8, 2025, SGI sensors detected a TCP connection from 46.24.47.94 (Spain) delivering a Javascript file. The ASN associated with the IP is AS12430 (VODAFONE ESPANA S.A.U.). No specific port was identified in the data. The delivered file has a SHA256 hash of 01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b. While VirusTotal shows mostly undetected status, further investigation is warranted.

Malware/Technique Overview

The delivered file is identified as part of the ‘standalone-framework.js’ family. Its small size (1 byte) and near-zero detection ratio at VirusTotal suggest either a benign file or a highly evasive payload. Without the payload, it is difficult to ascertain the specific techniques. However, common uses of Javascript files in attacks include:

• T1059.007 Command and Scripting Interpreter: JavaScript: Use of Javascript for execution
• T1566 Phishing: Could be delivered as part of a phishing attack
• T1189 Drive-by Compromise: Potential initial access vector if this was delivered via a compromised website.

VirusTotal Snapshot

VirusTotal analysis shows:

• Malicious: 0
• Undetected: 62
• Harmless: 0

Many vendors list this file with generic names, suggesting a lack of specific malicious indicators.

• VirusTotal Sample

Indicators of Compromise (IoCs)

Monitor these IoCs for at least 30 days.

Detection & Hunting

Given the limited information, focus on detecting similar network traffic patterns:

Splunk SPL

index=* src_ip=46.24.47.0/24 | stats count by dest_ip, dest_port, protocol

This query searches for connections from the identified IP range. Validate true positives by investigating the destination IPs and ports.

Containment, Eradication & Recovery

1. Isolate: Disconnect the affected host from the network to prevent further communication.
2. Block: Add the IP address (46.24.47.94) to your firewall blocklist.
3. Scan: Perform a full system scan with updated antivirus software.
4. Credential Reset: Reset any potentially compromised credentials that were used on the affected host.

Inform IT and leadership about the incident and the steps taken. Preserve logs and network traffic for further forensic analysis.

Hardening & Preventive Controls

• Multi-Factor Authentication (MFA) (NIST CSF: PR.AC-1, CIS Control 6): Implement MFA for all user accounts, especially those with administrative privileges.
• Endpoint Detection and Response (EDR) Tuning (NIST CSF: DE.CM-1, CIS Control 10): Fine-tune EDR rules to detect suspicious file transfers and network connections.
• Network Segmentation (NIST CSF: PR.DS-5, CIS Control 14): Segment the network to limit the impact of potential breaches.
• Principle of Least Privilege (NIST CSF: PR.AC-3, CIS Control 5): Grant users only the minimum necessary permissions to perform their job functions.
• Patch Management (NIST CSF: ID.AM-4, CIS Control 7): Establish and enforce SLAs for patching systems.

Business Impact & Risk Outlook

While the current risk is low, a successful exploitation of this type of vector could lead to data breaches, system compromise, and reputational damage. Legal and compliance ramifications could arise depending on the data accessed. In the next 3-6 months, expect attackers to continue using Javascript-based attacks, potentially evolving techniques to bypass traditional security measures.

Appendix

Redacted payload snippet (if available):

(Payload data redacted)

Assumptions & Data Gaps:

• The sensor name is not provided.
• The specific port used is missing.
• The payload content is missing for deeper analysis.

References:

• VirusTotal Sample

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