MalwareRansomwareUsed by 1 actor

Nitrogen ESXi ransomware

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THREAT ACTORS

Groups observed using it

1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.

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Nitrogen

“Nitrogen’s ESXi ransomware… has a ‘coding mistake in the ESXi malware [that] causes it to encrypt all the files with the wrong public key, irrevocably corrupting them.’”

via data breaches netdatabreaches.net

MITRE ATT&CK

Techniques & procedures

1 distinct technique documented for this family, organized by ATT&CK tactic.

Impact

1 technique

T1486Data Encrypted for ImpactEvidence1

TacticImpact

"Nitrogen’s ESXi ransomware... has a 'coding mistake in the ESXi malware [that] causes it to encrypt all the files with the wrong public key, irrevocably corrupting them.'"

ACTIVITY FEED

Recent activity

1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

1 SOURCESView more in app

data breaches netNews

Feb 6, 2026

Nitrogen’s ransomware can’t be decrypted - even by Nitrogen - DataBreaches.Net

Ransomware targeting ESXi systems; due to an implementation bug it overwrites the first four bytes of the public key and encrypts files with a corrupted/wrong key, making decryption impossible even for the operators.

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IOC matching

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Threat actor attribution1

Named campaigns wielding this family, with evidence pinned to each claim.

Exploited vulnerabilities

CVEs this family uses for access and lateral movement.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

MITRE ATT&CK mapping1

Every documented technique, ranked by evidence weight.

Researcher chatter

Reddit, Mastodon, and CTI community discussion around this family.