A message with a dangerous attachment.
Criminals send messages impersonating Social Security and urge you to open the attachment with the alleged "Health premium application". Don't be fooled, opening an attachment can infect your computer with malware NetWire, which enables criminals to steal passwords, among others.
These and similar incidents can be reported on the site incydent.cert.pl. CERT recommends caution and forwarding information so that people potentially at risk of attack are aware of the existence of a campaign.
Source: CERT Polska