Skip to main content
IOC Radar

Indicators are what attackers leave behind. Stolen credentials are what they arrive with.

Check Exposure
3 IOCs

UNC3753 Targets US Law Firms with Vishing and RMM Tools

Cyber Press
Cyber Press
Published June 6, 2026Original Report

Threat Actors

Malware Families

Excerpt

Mandiant’s Google Threat Intelligence Group (GTIG) has disclosed an active financially motivated campaign by threat cluster UNC3753, also tracked as “ Luna Moth ,” “Chatty Spider,” and “Silent Ransom Gr oup,” targeting dozens of US-based professional, legal, and financial services organizations. The campaign combines voice phishing (vishing), remote monitoring and management (RMM) tool abuse, and in some cases, physical office…

Read the original report →

Diamond Model

SOCIAL AXISTECHNOLOGY AXISADVERSARYLockBitUNC3753INFRASTRUCTUREhelpdesk.comit.comitdesk.comCAPABILITYLockBitVICTIMunknown
Adversary(2)
Infrastructure(3)
Capability(1)
Victim

Attack Flow10 steps · MITRE ATT&CK mapped

Initial AccessTA0001T1566
1/10
Phishing
ActionSend priming emails
Actors send benign invoice-themed emails to prime targets for a follow-up call.

Indicators of Compromise

Open the mindmap →

3 indicators

TypeIndicatorConfidenceScoreFirst Seen
Domainhelpdesk.comHighScore 62/100First seen
Domainit.comHighScore 58/100First seen
Domainitdesk.comHighScore 55/100First seen

IOC Relationship Graph

Building graph…