As of February 2023, the WannaCry ransomware attack launched in 2017 was the biggest attack by its impact. During this attack, cyber actors took over 250 thousand user accounts of Microsoft Windows. As a result of this attack, the company lost over four billion U.S. dollars. The latest of selected significant cyberattacks was the 2022 ransomware attack against Swisspost, in which 1.6 terabytes of data was stolen.
Most significant ransomware attacks worldwide as of May 2022, by impact
Name and release year of the attack
Loss
WannaCry (2017)
4 billion USD
TeslaCrypt (2015)
Unknown
NotPetya (2017)
10 billion USD
Sodinokibi (2019)
200 million
SamSam (2018)
6 million USD until 2,018
Ransomware attack on Colonial Pipeline (2021)
4.4 million USD
Ransomware attack on Kronos (2021)
Unknown
Ransomware attack on Impressa (2022)
50 terabytes of data
Ransomware attack on Costa Rica Government (2022)
30 million USD / day
Ransomware attack on Swisspost (2022)
1.6 terabytes data
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Astra Security Suite. (February 24, 2023). Most significant ransomware attacks worldwide as of May 2022, by impact [Graph]. In Statista. Retrieved April 26, 2025, from https://www.statista.com/statistics/1410605/largest-ransomware-attacks-worldwide/
Astra Security Suite. "Most significant ransomware attacks worldwide as of May 2022, by impact." Chart. February 24, 2023. Statista. Accessed April 26, 2025. https://www.statista.com/statistics/1410605/largest-ransomware-attacks-worldwide/
Astra Security Suite. (2023). Most significant ransomware attacks worldwide as of May 2022, by impact. Statista. Statista Inc.. Accessed: April 26, 2025. https://www.statista.com/statistics/1410605/largest-ransomware-attacks-worldwide/
Astra Security Suite. "Most Significant Ransomware Attacks Worldwide as of May 2022, by Impact." Statista, Statista Inc., 24 Feb 2023, https://www.statista.com/statistics/1410605/largest-ransomware-attacks-worldwide/
Astra Security Suite, Most significant ransomware attacks worldwide as of May 2022, by impact Statista, https://www.statista.com/statistics/1410605/largest-ransomware-attacks-worldwide/ (last visited April 26, 2025)
Most significant ransomware attacks worldwide as of May 2022, by impact [Graph], Astra Security Suite, February 24, 2023. [Online]. Available: https://www.statista.com/statistics/1410605/largest-ransomware-attacks-worldwide/
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