Net5system.exe !new! May 2026

Net5System.exe

is a malicious executable file often associated with cryptocurrency mining malware and unauthorized system access. It is frequently delivered through attack vectors that target database servers, such as Microsoft SQL Server (MSSQL). Key Characteristics

The name appears designed to blend in with legitimate .NET-related processes (e.g., mscorsvw.exe , dotnet.exe ). This social engineering targets administrators scanning task lists quickly. net5system.exe

Some variants of net5system.exe are disguised cryptocurrency miners (often Monero). They use your CPU/GPU to mine crypto for the attacker. Because it’s hidden as a system-like process, users often mistake high CPU usage for a Windows update or antivirus scan. Net5System

Data Theft

: Stealing personal information, banking credentials, or system usage data. File found in AppData , Temp , Downloads , or C:\Windows

Payload

: Deploys Monero (XMR) and PKT cryptocurrency miners.

Recommendations

• File found in AppData, Temp, Downloads, or C:\Windows.
• No record of purchasing/installing NET5 software in your organization.
• Antivirus flags it as Generic.ML or Trojan (note: low-prevalence false positives possible).

rule net5system_malware meta: description = "Detects known net5system.exe malicious samples" author = "Security Research" strings: $s1 = "net5system" nocase $s2 = "XMRig" ascii wide $s3 = "pool.supportxmr" ascii $s4 = "miner.exe" ascii condition: (filesize < 2MB) and (1 of ($s2,$s3,$s4)) and filename == "net5system.exe"