The Week in Review from Stamus Labs

Welcome to the weekly threat detection update report from Stamus Networks. Each week, you will receive this email with a summary of the updates.

Current Stamus Threat Intelligence (STI) release version: 1367

This week, in addition to daily ruleset and IOC updates, we provided Stamus Security Platform customers with the following improved defense(s):

New threat detection(s) added [1]: 0
Major changes to detections(s) [2]: 277
Updated threat detection(s) [3]: 277

Note: a "method" as referenced below, is a discrete detection vector for a given threat.

New Threat(s) Detected

The following detections were added to your Clear NDR (formerly Stamus Security Platform) this past week:

Major Detection Changes

The following detections were updated this past week with changes to kill chain phase(s) or MITRE ATT&CK tactic(s)/technique(s):

AgentTesla (Data Theft)

Agent Tesla is a spyware Trojan targeting Windows computers, written in the .NET framework, and first observed in 2014.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control, actions on objectives, delivery
Methods added: 1

ClickFix (Phishing)

In April 2024, researchers found compromised sites leading to an iframe on pley[.]es showing an error message. The payload domain was taken offline, preventing infection. Later, the iframe was replaced with the ClearFake inject.

Added kill chain phase(s): delivery
Previously supported kill chain phase(s): exploitation, delivery, command and control
MITRE ATT&CK added: T1189
Previously existing MITRE ATT&CK: T1071, T1027, T1189, T1102, T1036, T1105
Methods added: 6

Fake Browser (Trojan)

Attackers infect enterprise networks with malware by promoting fake browser updates on hacked websites, leading to the installation of banking trojans and later ransomware encryption on compromised networks.

Added kill chain phase(s): exploitation
Previously supported kill chain phase(s): delivery, exploitation, command and control
MITRE ATT&CK added: T1189
Previously existing MITRE ATT&CK: T1071, T1189
Methods added: 6

JanelaRAT (RAT)

JanelaRAT is a threat that uses various tactics like DLL side-loading and a multi-stage attack, targeting Latin American fintech companies.

Added kill chain phase(s): actions on objectives, delivery
Previously supported kill chain phase(s): command and control
Methods added: 2

Lumma (Data Theft)

Lumma is a C-based information stealer sold on Russian underground forums and Telegram by LummaC since August 2022. It targets cryptocurrency wallets and has file grabber capabilities.

Added kill chain phase(s): command and control, actions on objectives
Previously supported kill chain phase(s): actions on objectives, command and control, installation, delivery
MITRE ATT&CK added: T1071
Previously existing MITRE ATT&CK: T1005, T1071, T1573
Methods added: 118

NetSupport RAT (RAT)

Remote Access Trojans allow covert surveillance and unauthorized access to victim PCs, collecting keystrokes, passwords, screenshots, and more. They differ from keyloggers by providing remote access capabilities to attackers.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): actions on objectives, command and control, exploitation, installation
MITRE ATT&CK added: T1105
Previously existing MITRE ATT&CK: T1071, T1105
Methods added: 3

RAT Generic (RAT)

Remote Access Trojans allow covert surveillance and unauthorized access to victim PCs, collecting data like keystrokes and screenshots. They differ from keyloggers by enabling remote access for attackers.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): installation, command and control, actions on objectives, delivery
MITRE ATT&CK added: T1573
Previously existing MITRE ATT&CK: T1071, T1041, T1573
Methods added: 2

SocGholish (Social Engineering)

Malwarebytes found a new social engineering toolkit that uses compromised websites to perform advanced fingerprinting checks and deliver the NetSupport RAT payload.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control, exploitation, delivery, reconnaissance, actions on objectives
Methods added: 14

TA455 (APT)

Meta took action against a hacking group from Iran that targeted various industries worldwide. The group's tactics resembled another threat actor, but with different targets, infrastructure, and malware.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control, installation
Methods added: 9

Trojan clipper (Trojan)

Trojan.Clipper is a type of Trojan malware that targets Windows systems to steal or manipulate currency data by taking advantage of the Windows clipboard.

Added kill chain phase(s): delivery, command and control
Previously supported kill chain phase(s): exploitation, command and control, delivery
MITRE ATT&CK added: T1041
Previously existing MITRE ATT&CK: T1071
Methods added: 8

XWorm (RAT)

Cyble research labs found a malware developer advertising a powerful Windows RAT on the dark web during a threat-hunting exercise.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control, delivery
MITRE ATT&CK added: T1573
Previously existing MITRE ATT&CK: T1071, T1573
Methods added: 108

Other Threat Detection Update(s)

The following threat detection(s) were improved this past week with new or updated threat methods.

Name of threat	New coverage			Total coverage			Last updated
	New Detection methods	Kill chain phases	Protocols involved	Detection methods	Kill chain phases	Protocols involved
AgentTesla	1	command and control	http	52	actions on objectives, command and control, delivery	dns, ftp, http, smtp, tcp, tcp-pkt, tls	2025-06-07
ClickFix	6	delivery	dns, tls, http	191	command and control, delivery, exploitation	dns, http, tls	2025-06-07
Fake Browser	6	exploitation	dns, tls, http	1651	command and control, delivery, exploitation	dns, http, tls	2025-06-04
JanelaRAT	2	actions on objectives, delivery	http	3	actions on objectives, command and control, delivery	http	2025-06-04
Lumma	118	command and control, actions on objectives	dns, tls, http	6066	actions on objectives, command and control, delivery, installation	dns, http, tls	2025-06-07
NetSupport RAT	3	command and control	http	114	actions on objectives, command and control, exploitation, installation	dns, http, tls	2025-06-07
RAT Generic	2	command and control	tcp	276	actions on objectives, command and control, delivery, installation	dns, http, tcp, tcp-pkt, tls, udp	2025-06-07
SocGholish	14	command and control	dns, tls, http	1520	actions on objectives, command and control, delivery, exploitation, reconnaissance	dns, http, tcp, tcp-pkt, tls	2025-06-06
TA455	9	command and control	dns, tls, http	566	command and control, installation	dns, http, tls	2025-06-05
Trojan clipper	8	delivery, command and control	http, dns, tls	20	command and control, delivery, exploitation	dns, http, tls	2025-06-06
XWorm	108	command and control	tcp-pkt	3430	command and control, delivery	dns, http, tcp, tcp-pkt, tls	2025-06-03

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