[News](/news) US retailer Kmart breached in cyber attack [Blog](/blog)[Breaches](/breaches)[Resources](/resources)[News](/news) # US retailer Kmart breached in cyber attack ##### [Edward Kost](/team/edward-kost) December 6, 2020 US retailer Kmart is the latest victim of an [Egregor ransomware attack](https://www.upguard.com/blog/what-is-egregor-ransomware). The cybercriminals breached the retail giant’s back-end servers and encrypted the accessed [sensitive data](https://www.upguard.com/blog/sensitive-data). Staff became aware of the breach when their internal employee portal 88sears failed to load due to a server error. Egregor has claimed responsibility for the attack in their ransom note. The cybercriminal group adopts a double-extortion model to successfully convince victims to pay their ransom price. Breached sensitive data is continuously [published onto the dark web](https://www.upguard.com/blog/dark-web) and exposed to other criminals on the network. This process does not stop until the ransom price is paid. Kmart is yet to confirm the details of the breached data. This event is particularly troublesome to the already struggling retailer on the cusp of a busy spending season. ## How secure is 88 Sears? 88 Sears appears to be a private organization with limited publicly available information about its operations. Without accessible website content or additional sources, the specific nature of its business activities cannot be determined. * View our free preliminary report on 88 Sears’s security posture * 13 risk factors, including email security, SSL, DNS health, open ports and common vulnerabilities [View 88 Sears's score](/security-report/88-sears) [View score](/security-report/88-sears) [http://88sears.com](/security-report/88-sears) ### Sign up for our newsletter UpGuard's monthly newsletter cuts through the noise and brings you what matters most: our breaking research, in-depth analysis of emerging threats, and actionable strategic insights. ## Latest news Stay up-to-date with the latest news in cybersecurity. [](/news/hugging-face-data-breach-2026-07-20) #### [Hugging Face data breach: key facts and what we know so far](/news/hugging-face-data-breach-2026-07-20) A data breach involving Hugging Face was reported in July 2026. See incident details, impact on customers, and recommended security measures. ##### [UpGuard Team](/team/upguard) July 20, 2026 [](/news/ey-data-breach-2026-07-19) #### [EY data breach: what happened and what's at risk](/news/ey-data-breach-2026-07-19) A data breach involving EY was reported in July 2026. See incident details, impact on customers, and recommended security measures. ##### [UpGuard Team](/team/upguard) July 15, 2026 [](/news/south-florida-injury-convenient-care-data-breach-2026-07-16) #### [South Florida Injury & Convenient Care data breach exposes names and Social Security numbers](/news/south-florida-injury-convenient-care-data-breach-2026-07-16) A data breach involving South Florida Injury & Convenient Care was reported in July 2026. See incident details, impact on customers, and security measures. ##### [UpGuard Team](/team/upguard) July 15, 2026 [](/news/park-west-psychology-data-breach-2026-07-16) #### [Park West Psychology data breach: what happened and what's at risk](/news/park-west-psychology-data-breach-2026-07-16) A data breach involving Park West Psychology was reported in July 2026. See incident details, impact on customers, and recommended security measures. ##### [UpGuard Team](/team/upguard) July 15, 2026 [](/news/fall-river-municipal-credit-union-data-breach-2026-07-16) #### [Fall River Municipal Credit Union data breach: what happened and what's at risk](/news/fall-river-municipal-credit-union-data-breach-2026-07-16) A data breach involving Fall River Municipal Credit Union was reported in July 2026. See incident details, impact on customers, and recommended security measures. ##### [](#) July 14, 2026 [](/news/npcil-data-breach-2026-07-16) #### [NPCIL data breach: World Leaks claims exposure of Kudankulam Nuclear Power Plant files](/news/npcil-data-breach-2026-07-16) A data breach involving NPCIL was reported in July 2026. See incident details, impact on customers, and recommended security measures. ##### [UpGuard Team](/team/upguard) July 14, 2026 [View all news](/news) ## Protect your organization Get in touch or book a free demo. [Contact sales](/demo) [Free demo](/demo) ##### Free instant security score ## How secure is your organization? Request a free cybersecurity report to discover key risks on your website, email, network, and brand. * Instant insights you can act on immediately * Hundreds of risk factors including email security, SSL, DNS health, open ports and common vulnerabilities [Free score](/instant-security-score)