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VirusTotal has added daily scanning of the public IPv4 address space, giving investigators exposed-service data and historical port activity to help uncover command-and-control servers and related malware infrastructure. Analysts can search service versions, SSH host keys, RDP fingerprints, HTTP headers, certificates, and other characteristics to connect hosts even when they have no malware detections. Published examples showed how shared SSH fingerprints and certificates linked infrastructure, how service searches narrowed potential stealer infrastructure, and how FTP banners matched previously researched command-delivery patterns.
The scanning data is available through VirusTotal’s web interface and API, but IP Livehunt rules do not yet support it. Security teams can use these signals to expand investigations beyond known malicious IP addresses and track infrastructure changes over time. VirusTotal cautioned that historical malware associations, reused fingerprints, and open ports do not independently prove malicious activity or establish threat-actor attribution; findings require corroboration before blocking or attribution decisions.
TTPs, infrastructure, and targeting history in one profile.
4 events from the most recent confirmed update back to the earliest known activity.
VirusTotal announced daily public IPv4 scanning, adding exposed-service details, server fingerprints, and historical port activity to its IP intelligence. The data is searchable through the web interface and API, but is not yet supported by IP Livehunt rules.
Researchers searching FTP banners containing conhost found five addresses tied to command-delivery patterns discussed in E4del and PINHOLE research.
Researchers identified a NOX Stealer login panel at 5.175.221[.]206 and combined its exposed-service characteristics to narrow a search from 4.5 million hosts to ten unconfirmed candidates. Browser analysis subsequently captured the panel title changing to BOMBAY Stealer while the exposed services remained unchanged.
A demonstration starting with 91.219.237[.]110 linked it to 185.146.232[.]3 through a shared SSH fingerprint, then uncovered 96.9.125[.]59 through the certificate name b4ck.my. VirusTotal cautioned that historical malware associations and reused fingerprints do not establish current malicious activity or APT28 attribution.
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Threat reporting and incident investigations show **network service discovery** has become a routine precursor to both ransomware deployment and state-backed intrusion activity. MITRE ATT&CK catalogs this behavior as technique `T1046`, covering port scanning, service enumeration, OS fingerprinting, and identification of exposed technologies such as Docker, Kubernetes, ESXi, and ICS services. CISA also warned that Chinese Ministry of State Security-affiliated actors rapidly scan for newly disclosed vulnerabilities on internet-facing systems and then exploit flaws including `CVE-2020-5902`, `CVE-2019-19781`, `CVE-2019-11510`, and `CVE-2020-0688`, often following up with tools such as **Cobalt Strike**, **China Chopper**, and **Mimikatz**. Ransomware case studies show the same reconnaissance pattern inside victim networks. Hunt & Hackett reported that **Advanced IP Scanner** is frequently used during targeted intrusions and leaves useful Windows registry artifacts under `HKEY_USERS\<SID>\SOFTWARE\famatech\advanced_ip_scanner`, including scanned ranges and search history. Analysis of **Conti** source code found the malware derives internal subnets from the ARP table, scans hosts over SMB port `445`, and enumerates shares with `NetShareEnum`, while Cisco Talos documented **Maze** operators using **Cobalt Strike**, **RDP**, **WMIC**, **PowerShell**, and **7-Zip** during prolonged lateral movement and data theft before encryption. Separately, Intrinsec linked large-scale mass-scanning and brute-force traffic to BtHoster-associated bulletproof hosting networks that also hosted malware and command-and-control infrastructure, underscoring how scanning activity is supported by resilient criminal infrastructure.
Aug 15, 2026
SentinelOne reported that reexamining older cyber intrusions with modern tooling is yielding new intelligence that can improve present-day defense. The research says retrospective analysis can expand indicators of compromise, reveal broader victimology, strengthen attribution, and surface infrastructure or malware relationships that were missed during the original investigations. Examples cited include new insights into the **Sandman** cluster, **ModifiedElephant** activity targeting individuals in India, Chinese-attributed operations in Africa linked to **Backdoor Diplomacy** and **BRONZE STARLIGHT**, and the **Appin** hack-for-hire operation in India. SentinelOne said improved **YARA** techniques and access to large malware repositories such as **Stairwell** and **VirusTotal** are helping analysts extract fresh findings from historical datasets, malware samples, and legacy infrastructure.
Jun 29, 2026
Hunt.io identified additional infrastructure associated with **BraZetsu**, a Windows malware framework used to compromise machines and inventory access for resale through Infected Marketplace. Group-IB previously attributed the Python-based framework, compiled with Nuitka, to Brazilian actor Exilware with high confidence. Certificate records showed the disclosed command-and-control hostname, `c2.installscenter.com`, serving TLS on `80.78.27[.]252` from April 4, 2026, alongside `painel.installscenter.com`—almost five months before Group-IB’s August 31 disclosure. Retained Portuguese panel naming and Hestia Control Panel configurations supported a medium-confidence assessment that the operation migrated from a Contabo VPS to a Njalla VPS. The host’s relevant TLS services disappeared in June, and subsequent service and SSH-key changes mean defenders should **not treat the IP as currently malicious without validation**. Wildcard certificates issued as recently as October 2 indicate continued domain-zone activity but do not prove the command-and-control service remains operational. Hunt.io recommended hunting for recurring hostname, certificate, and endpoint patterns rather than relying solely on rapidly changing IP addresses or malware hashes, and notified relevant national CERTs before publication.
Oct 9, 2026