Network Traffic Analysis Reveals 75% Malware Threats Over 10 Months of Monitoring

Positive Technologies analyzed anonymized data from PT Sandbox and PT Network Attack Discovery collected between October 2025 and July 2026. The study found that malicious software accounted for 75% of all detected threats in organizational network traffic. Information-stealing trojans made up 24% of malware samples, with 85% of those focused on credential theft. RATs, loaders, and ransomware each represented smaller but high-impact shares. Legacy vulnerabilities such as CVE-2017-0199 and CVE-2017-11882 remained active attack vectors. Activity from groups including MustangPanda, TA505, and APT37 was observed across finance, manufacturing, and government sectors.

HabrSeptember 18, 2026Translated from Russian

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Positive Technologies examined anonymized network traffic data collected over ten months to identify the most prevalent cyber threats. The analysis combined public incident reports, internal expertise, and results from PT Sandbox and PT Network Attack Discovery, covering the period from October 2025 to July 2026.

Malware Dominates Detected Threats

Malicious software represented 75% of all threats observed in network traffic. This category remains the primary attack method used against organizations regardless of industry. Within the malware samples, 50% were generic trojans, while 24% were information-stealing trojans. Of the spyware samples, 85% targeted credential theft and 15% focused on user activity monitoring.

Loaders and droppers accounted for 15% of malware detections, with 78% of that subset functioning as downloaders. Remote access trojans (RATs) made up 7%, including Remcos RAT and Async RAT. Ransomware comprised approximately 4% of samples, while worms were detected in only 2% of cases.

Potentially Unwanted Tools and Living-off-the-Land Binaries

Potentially unwanted tools represented 8% of detections. The most frequently observed utilities included PsExec, ProcDump, Mimikatz, and components from the NirSoft suite. These tools allow attackers to perform reconnaissance, credential dumping, and lateral movement while blending with legitimate administrative activity.

PowerShell-based frameworks such as PowerSploit and remote monitoring tools like UltraVNC were also identified. Network scanners such as Advanced IP Scanner appeared in reconnaissance phases.

Legacy Vulnerabilities and Delivery Methods

More than 96% of detected CVEs were at least three years old. Attackers continued to exploit CVE-2017-0199 and CVE-2017-11882 in Microsoft Office documents. Executable files accounted for 29% of detections, while Microsoft Office documents represented 26%.

Sector Distribution and Threat Actor Activity

The highest number of detections occurred in the financial sector (25%), followed by manufacturing (24%) and IT (24%). Signs of activity from known groups such as MustangPanda, TA505, and APT37 were recorded in the monitored traffic.

MustangPanda APT37 AgentTesla Formbook Remcos RAT CVE-2017-0199

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