Nightspire
Since Mar 12, 2025, Nightspire has listed 377 organizations on its leak site.
Listings per month
- Total listings
- 377
- First listing
- Mar 12, 2025
- Latest listing
- Nov 2, 2026
- MITRE ATT&CK techniques
- 35
NightSpire is a ransomware group that first emerged in March 2025 and rapidly claimed over 250 victims across retail, manufacturing, healthcare, finance, and education sectors in the US, France, India, Taiwan, and Japan, using aggressive double-extortion with ransom deadlines as short as two days.
It posted 283 listings in the last 12 months; the busiest month was March 2026 (63 listings).
Most targeted country: United States, with 101 listings (27% of the total).
Most targeted sector: Manufacturing, with 63 listings (17% of the total).
Targeted countries
Showing 10 of 377 results
35 MITRE ATT&CK techniques across 13 stages are documented in the group's attacks.
- 1
Resource development
Infrastructure, accounts and tools for the attack are prepared.
T1587Develop Capabilities - 2
Initial access
The attacker gets into the corporate network for the first time.
T1078Valid AccountsT1110Brute ForceT1190Exploit Public-Facing ApplicationT1566Phishing - 3
Execution
Malicious code runs on the target system.
T1059Command and Scripting InterpreterT1072Software Deployment Tools - 4
Persistence
Access survives reboots and password changes.
T1053Scheduled Task/JobT1136Create AccountT1547Boot or Logon Autostart ExecutionT1547.001Boot or Logon Autostart Execution: Registry Run Keys / Startup Folder - 5
Privilege escalation
The attacker moves to accounts with higher privileges.
T1068Exploitation for Privilege Escalation - 6
Defense evasion
Security software and logging are bypassed.
T1027Obfuscated Files or InformationT1036MasqueradingT1070Indicator RemovalT1218System Binary Proxy Execution - 7
Credential access
Passwords, tokens and session data are stolen.
T1003OS Credential DumpingT1003.001OS Credential Dumping: LSASS MemoryT1552Unsecured Credentials - 8
Discovery
Systems, accounts and data on the network are mapped.
T1046Network Service DiscoveryT1057Process DiscoveryT1082System Information DiscoveryT1083File and Directory Discovery - 9
Lateral movement
The attacker moves to other systems inside the network.
T1021.001Remote Services: Remote Desktop ProtocolT1021.002Remote Services: SMB/Windows Admin SharesT1047Windows Management Instrumentation - 10
Collection
Data to be stolen is selected and gathered.
T1119Automated CollectionT1560Archive Collected DataT1560.001Archive Collected Data: Archive via Utility - 11
Command and control
Compromised systems are controlled remotely.
T1071Application Layer ProtocolT1573Encrypted Channel - 12
Exfiltration
Data is moved out of the organization; the threat to publish it in the listing relies on this data.
T1041Exfiltration Over C2 ChannelT1048Exfiltration Over Alternative ProtocolT1567.002Exfiltration Over Web Service: Exfiltration to Cloud Storage - 13
Impact
Systems are encrypted or services are stopped.
T1486Data Encrypted for Impact
What does a ransomware group do?
Ransomware groups break into corporate networks, move data out and encrypt systems. If the ransom is not paid, they list the organization on a leak site and threaten to publish the data.
How does Nightspire get into organizations?
The attacker gets into the corporate network for the first time.
- T1078 · Valid Accounts
- T1110 · Brute Force
- T1190 · Exploit Public-Facing Application
- T1566 · Phishing
Which defenses matter most?
Priority defenses based on the documented techniques:
- Keep internet-facing VPN, remote desktop and firewall interfaces patched, and require multi-factor authentication on these accounts.
- Allow scripts and macros only for users who need them, and keep behavioral rules enabled in endpoint protection.
- Monitor newly created services, scheduled tasks and startup entries.
- Reduce local administrator accounts and perform privileged tasks from separate, monitored accounts.
- Alert when security software is disabled or logs are cleared.
- Regularly check whether employee passwords and session cookies appear in infostealer logs.
- Monitor accounts that run many queries in a short time and unusual network scans.
- Segment the network and expose management protocols only on the management network.
- Monitor large file archiving operations.
- Block unapproved use of remote management tools.
- Monitor unusual data volumes sent to cloud storage and file transfer services.
- Keep offline, immutable backups and test restores regularly.
What should you do if your organization is listed on a leak site?
- Record the listing and any published sample files; do not visit the leak site from the corporate network.
- Isolate affected systems and preserve logs without deleting them.
- Determine which data left the organization; if personal data is involved, review notification obligations with your legal team.
- Make any decision about the ransom demand together with legal, management and incident response.
- Do not bring systems back online before the attacker’s entry point is closed.
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