FoxBlade
{{short description|2022 Windows malware}}
{{Infobox computer virus
| fullname = FoxBlade
| image =
| caption =
| common_name =
| technical_name = Win32/FoxBlade
| aliases =
| family =
| classification =
| type =
| subtype = Wiper
| isolation_date =
| origin = Russia (suspected)
| infection_vector =
| author = Unknown
| ports_used =
| OS = Microsoft Windows
| filesize =
| language =
}}
FoxBlade is a trojan horse wiper malware{{cite web
| url = https://www.microsoft.com/en-us/wdsi/threats/malware-encyclopedia-description?Name=DoS:Win32/FoxBlade.A!dha&ThreatID=2147813512
| title = DoS:Win32/FoxBlade.A!dha threat description
| date = 23 February 2022
| website = Microsoft Security Intelligence website
| publisher = Microsoft
| access-date = 28 February 2022
| quote = }} identified on 23 February 2022 by Microsoft's Threat Assessment Center that appeared to be aimed at targets in Ukraine's government.{{cite web
| last = Greig
| first = Jonathan
| title = Microsoft finds FoxBlade malware on Ukrainian systems, removes RT from Windows app store
| work = News
| publisher = ZDNet
| date = 28 February 2022
| url = https://www.zdnet.com/article/microsoft-finds-foxblade-malware-on-ukrainian-systems-removing-rt-from-windows-app-store/
| format =
| doi =
| accessdate = 28 February 2022}} FoxBlade was discovered in Ukrainian networks on the day of the Russian invasion of Ukraine, and it is suspected it is part of the cyberattacks on Ukraine connected with that invasion. Coordination between the United States and Microsoft was reported as unusually productive, as executives were given security clearances to join calls with intelligence officials. Microsoft coordinated with the European Union to prevent FoxBlade from being used against other countries in Europe.{{Cite news
| last1 = Sanger
| first1 = David E.
| last2 = Barnes
| first2 = Julian E.
| last3 = Conger
| first3 = Kate
| title = As Tanks Rolled Into Ukraine, So Did Malware. Then Microsoft Entered the War.
| newspaper = The New York Times
| location = New York, US
| date = 28 February 2022
| url = https://www.nytimes.com/2022/02/28/us/politics/ukraine-russia-microsoft.html
| accessdate = 28 February 2022}}