SilentRansomGroup
Since May 6, 2025, SilentRansomGroup has listed 227 organizations on its leak site.
Listings per month
- Total listings
- 227
- First listing
- May 6, 2025
- Latest listing
- Nov 6, 2026
- MITRE ATT&CK techniques
- 9
A former Conti team aka Chatty Spider and UNC3753
It posted 148 listings in the last 12 months; the busiest month was October 2026 (63 listings).
Also known as: Luna Moth, Silent Ransom, TG2729
Most targeted country: United States, with 145 listings (64% of the total).
Most targeted sector: Professional Services, with 112 listings (49% of the total).
Targeted countries
Showing 10 of 227 results
9 MITRE ATT&CK techniques across 6 stages are documented in the group's attacks.
- 1
Reconnaissance
Information about the target organization is gathered before the attack.
T1598.004Spearphishing Voice - 2
Initial access
The attacker gets into the corporate network for the first time.
T1078Valid AccountsT1566Phishing - 3
Collection
Data to be stolen is selected and gathered.
T1530Data from Cloud StorageT1560Archive Collected Data - 4
Command and control
Compromised systems are controlled remotely.
T1219Remote Access Tools - 5
Exfiltration
Data is moved out of the organization; the threat to publish it in the listing relies on this data.
T1052.001Exfiltration over USBT1567Exfiltration Over Web Service - 6
Impact
Systems are encrypted or services are stopped.
T1657Financial Theft
Published reports on this actor:
- https://blog.eclecticiq.com/from-callback-phishing-to-extortion-luna-moth-abuse-reamaze-helpdesk-and-rmm-tools-against-u.s.-legal-and-financial-sectors
- https://unit42.paloaltonetworks.com/luna-moth-callback-phishing/
Source: MISP Galaxy, Malpedia.
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 SilentRansomGroup get into organizations?
The attacker gets into the corporate network for the first time.
- T1078 · Valid Accounts
- 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.
- 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.
Is your organization mentioned?
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