Tengu
Since Oct 23, 2025, Tengu has listed 49 organizations on its leak site.
Listings per month
- Total listings
- 49
- First listing
- Oct 23, 2025
- Latest listing
- Mar 7, 2026
- MITRE ATT&CK techniques
- 10
Tengu is a RaaS operation first observed in October 2025, following a double-extortion model and using Living Off The Land Binaries (LOLBins) to blend malicious activity with normal admin traffic, primarily targeting consumer goods, real estate, automotive, healthcare, and IT sectors.
It posted 41 listings in the last 12 months; the busiest month was January 2026 (28 listings).
Also known as: Shisa
Most targeted country: India, with 5 listings (10% of the total).
Most targeted sector: Technology, with 10 listings (20% of the total).
Targeted countries
Showing 10 of 49 results
10 MITRE ATT&CK techniques across 7 stages are documented in the group's attacks.
- 1
Initial access
The attacker gets into the corporate network for the first time.
T1078Valid Accounts - 2
Execution
Malicious code runs on the target system.
T1059.001Command and Scripting Interpreter: PowerShellT1059.003Command and Scripting Interpreter: Windows Command Shell - 3
Persistence
Access survives reboots and password changes.
T1053.005Scheduled Task/Job: Scheduled Task - 4
Defense evasion
Security software and logging are bypassed.
T1070Indicator RemovalT1218System Binary Proxy Execution - 5
Lateral movement
The attacker moves to other systems inside the network.
T1021.001Remote Services: Remote Desktop Protocol - 6
Exfiltration
Data is moved out of the organization; the threat to publish it in the listing relies on this data.
T1041Exfiltration Over C2 Channel - 7
Impact
Systems are encrypted or services are stopped.
T1486Data Encrypted for ImpactT1490Inhibit System Recovery
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 Tengu get into organizations?
The attacker gets into the corporate network for the first time.
- T1078 · Valid Accounts
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.
- Alert when security software is disabled or logs are cleared.
- Segment the network and expose management protocols only on the management network.
- 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.
Is your organization mentioned?
Search with your domain to check whether your organization appears in ransomware listings, leaked records, forums and Telegram channels.
Search your domainIntelligence 360
Customer intelligence on top of Infostealer Detection: leaked accounts of end users who sign in to your site.