lorenz
- First seen
- 2021-01-01 00:00:00
- Malware type
- ransomware
- Family
- Malware family
- Last IoC activity
- 2026-07-12 01:01:15
- Profile updated
- 2026-07-07 13:48:25
Targeted industries: healthcare-and-pharmaceutical education-and-nonprofits government-and-public-sector manufacturing technology-and-telecommunications
Context
Tesorion describes Lorenz as a ransomware with design and implementation flaws, leading to impossible decryption with tools provided by the attackers. A free decryptor for 2021 versions was made available via the NoMoreRansom initiative. A new version of the malware was discovered in March 2022, for which again was provided a free decryptor, while the ransomware operators are not able to provide tools to decrypt affected files.
Detection coverage
- 2 YARA rules
Detection rules
- SEKOIA_Ransomware_Win_Lorenz (yara-rule)
- SIGNATURE_BASE_MAL_RANSOM_Lorenz_May21_1 (yara-rule)
Reports & references
- arcticwolf.com — Lorenz Ransomware Chiseling In (report)
- ransomlook.io — Lorenz (report)
- zdnet.com — Lorenz Ransomware Attack Victims Can Now Retrieve Their Files For Free With This Decryption Tool (report)
- cybertalk.org — The Worst Outcomes Lorenz Ransomware A New Double Extortion Strategy (report)
- therecord.media — Free Decrypter Available For Lorenz Ransomware (report)
- twitter.com — 1423190900516302860 (report)
- bleepingcomputer.com — Meet Lorenz A New Ransomware Gang Targeting The Enterprise (report)
- cybereason.com — Cybereason Vs. Lorenz Ransomware (report)
- tesorion.nl — Lorenz Ransomware Analysis And A Free Decryptor (report)
- tesorion.nl — Lorenz Ransomware Rebound Corruption And Irrecoverable Files (report)
- malpedia.caad.fkie.fraunhofer.de — Win.Lorenz (report)
- arcticwolf.com — Lorenz Ransomware Getting Dumped (report)