This record tracks a ransomware attack claimed by the
devman group against
mcchemical.com. It collects the publicly disclosed attack details — sector, location and
timeline — as published on the operator's leak site and indexed by Breach House.
Window Zero
EXPOSURE GAP
Window Zero is the time the breach stayed in the open before
anyone said so — the gap between when the attack was first discovered
on the operator's leak site (t1) and when it was publicly disclosed (t2).
The wider this window, the longer victims, staff and customers were exposed with no warning.
-31days
t1 · Published
t2 · Disclosed
Business Category
Manufacturing / Engineering
Published
November 19, 2025
Disclosed / Notified
Oct 20, 2025
Attack Summary
mcchemical.com is the website of MidContinental Chemical Company, Inc. (MCC), a US-based manufacturer headquartered in Olathe, Kansas. The company produces and distributes petroleum additives designed to improve the performance of fuels and lubricating oils in vehicles, equipment, and machinery. MCC has operated since 1994 and supports research and product development alongside sales, marketing, and supply chain functions. In threat-intelligence listings, mcchemical.com was identified as a ransomware victim associated with devman.
Leak Screenshots
SAMPLE
Proof-of-breach screenshots the operator posted from the stolen data. Previews are
redacted and locked — the originals are available on HaveIBeenRansom.
Dark Web Exposure
Findings for mcchemical.com
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
380+
found in Traditional breaches
63+
found in Ransomware leaks
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••• emails
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medusa · ransomware
••• emails
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play · ransomware
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
linkedIN_2.7z.001
Database World ROC · breach
••• emails
Televerde
play · ransomware
••• emails
+ 17 more leak sources locked
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Legal Disclaimer:
This ransomware victim record reflects information published on the operator's leak site.
Breach.house does not acquire, download, host, access or redistribute unlawfully obtained data. It indexes only publicly visible information posted by ransomware, breach and infostealer operators and open web sources, without accessing the underlying stolen content. The service supports public awareness, legitimate research and cyber-resilience.