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: 1618

 

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]: 2 (TeamPCP, plain-crypto-js RAT)

• Major changes to detections(s) [2]: 220

• Updated threat detection(s) [3]: 275

 

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 this past week:

 

TeamPCP (Trojan)

TeamPCP has attacked LiteLLM, an open-source Python library and proxy server, commonly used in cloud environments. This could have a significant impact due to its widespread presence.

• Total number of detection methods: 9

• Kill chain phase(s): command and control, delivery

• MITRE ATT&CK: T1071, T1105

 

plain-crypto-js RAT (RAT)

npm account of axios maintainer was compromised, leading to publication of malicious npm package versions. Despite quick removal, axios's wide usage allowed rapid exposure in affected environments. Organizations urged to audit for potential execution.

• Total number of detection methods: 46

• Kill chain phase(s): command and control

• MITRE ATT&CK: T1071

 

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):

 

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, installation

• MITRE ATT&CK added: T1189

• Previously existing MITRE ATT&CK: T1071, T1027, T1189, T1105, T1102, T1566, T1036

• Methods added: 8

 

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: 16

 

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, T1105

• Methods added: 30

 

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

 

PhantomStealer (Data Theft)

Proofpoint researchers discovered a rise in Stealerium-based malware campaigns, including those by cybercriminal actors TA2715 and TA2536 in May 2025. Multiple campaigns using different methods were identified through August 2025.

• Added kill chain phase(s): actions on objectives, command and control

• Previously supported kill chain phase(s): command and control

• MITRE ATT&CK added: T1041, T1071

• Methods added: 6

 

Ransomware Generic (Ransomware)

Ransomware is a type of malware that blocks users from their system or files and demands ransom payment for access. Originally payment was sent via mail, now via cryptocurrency or credit card.

• Added kill chain phase(s): command and control, delivery, actions on objectives

• Previously supported kill chain phase(s): command and control, actions on objectives

• MITRE ATT&CK added: T1105, T1071

• Previously existing MITRE ATT&CK: T1486, T1071

• Methods added: 19

 

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: 21

 

TA4903 (APT)

Advanced persistent threats (APTs) are stealthy threat actors, often nation states or state-sponsored groups, who gain unauthorized access to networks for political or economic motivations, utilizing various tactics to remain undetected.

• Added kill chain phase(s): delivery

• Previously supported kill chain phase(s): delivery

• Methods added: 6

 

Unknown APT (APT)

Sophisticated adversary with expertise and resources uses multiple attack vectors to establish presence in organizations' IT infrastructure, exfiltrate information, undermine missions, and persistently adapt to defenders.

• Added kill chain phase(s): delivery, command and control, actions on objectives

• Previously supported kill chain phase(s): command and control, delivery, actions on objectives

• MITRE ATT&CK added: T1071, T1041

• Previously existing MITRE ATT&CK: T1041, T1071, T1001, T1566, T1102, T1105

• Methods added: 5

 

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: 106

 

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
ClickFix	8	delivery	dns, tls, http	449	command and control, delivery, exploitation, installation	dns, http, tls	2026-04-04
Fake Browser	16	exploitation	dns, tls, http	1975	command and control, delivery, exploitation	dns, http, tls	2026-04-04
Lumma	30	command and control, actions on objectives	dns, tls, http	7840	actions on objectives, command and control, delivery, installation	dns, http, tls	2026-04-04
NetSupport RAT	3	command and control	http	209	actions on objectives, command and control, exploitation, installation	dns, http, tls	2026-04-03
PhantomStealer	6	actions on objectives, command and control	http	9	actions on objectives, command and control	dns, http, tls	2026-04-02
Ransomware Generic	19	command and control, delivery, actions on objectives	dns, tls, http	26	actions on objectives, command and control, delivery	dns, http, tls	2026-04-03
SocGholish	21	command and control	dns, tls, http	2180	actions on objectives, command and control, delivery, exploitation, reconnaissance	dns, http, tcp, tcp-pkt, tls	2026-04-04
TA4903	6	delivery	dns, tls, http	2486	delivery	dns, http, tls	2026-04-03
TeamPCP	9	command and control, delivery	dns, tls, http	9	command and control, delivery	dns, tls, http	2026-04-01
Unknown APT	5	delivery, command and control, actions on objectives	http, dns, tls, tcp	2010	actions on objectives, command and control, delivery	dns, http, tcp, tls	2026-04-02
XWorm	106	command and control	tcp-pkt, http	4954	command and control, delivery	dns, http, tcp, tcp-pkt, tls	2026-04-01
plain-crypto-js RAT	46	command and control	dns, http, tls	46	command and control	dns, http, tls	2026-04-02

 

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