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: 1548

 

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]: 3 (123stealer, Desk RAT, EtherRAT)
• Major changes to detections(s) [2]: 149
• Updated threat detection(s) [3]: 159

 

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:

 

123stealer (Data Theft)

Infostealers like 123stealer secretly collect sensitive data like usernames, passwords, session tokens, system information, and cryptocurrency wallet keys to be used for financial gain or further cyber attacks.

Malpedia | Malwarebazaar |

• Total number of detection methods: 2
• Kill chain phase(s): actions on objectives, delivery
• MITRE ATT&CK: T1071, T1105

 

Desk RAT (RAT)

DeskRAT uses stealth servers for C2 communication, connecting to a WebSocket on port 8080. This tactic helps avoid detection in NS records for associated domains.

• Total number of detection methods: 5
• Kill chain phase(s): command and control
• MITRE ATT&CK: T1041

 

EtherRAT (RAT)

EtherRAT employs Ethereum smart contracts for C2 URL resolution, ensuring persistence through five independent mechanisms for survival across reboots and system maintenance. [Source: Malpedia]

• MAlwarebazar |
• Total number of detection methods: 3
• 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):

 

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: 12

 

LandUpdate808 (Trojan)

Fake update variants like SocGholish, Clear Fake, Smart Ape, and ClickFix are being tracked by a collaboration introducing the LandUpdate808 Fake Update Variant.

• Added kill chain phase(s): command and control
• Previously supported kill chain phase(s): delivery, command and control
• MITRE ATT&CK added: T1189
• Previously existing MITRE ATT&CK: T1189, T1105, T1071
• Methods added: 21

 

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: 27

 

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

 

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: 15

 

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

 

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: 70

 

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
123stealer	2	actions on objectives, delivery	http	2	actions on objectives, delivery	http	2026-01-16
Desk RAT	5	command and control	tcp	5	command and control	tcp	2026-01-16
EtherRAT	3	command and control	http	3	command and control	http	2026-01-16
Fake Browser	12	exploitation	dns, tls, http	1850	command and control, delivery, exploitation	dns, http, tls	2026-01-16
LandUpdate808	21	command and control	dns, tls, http	758	command and control, delivery	dns, http, tls	2026-01-17
Lumma	27	command and control, actions on objectives	dns, tls, http	7321	actions on objectives, command and control, delivery, installation	dns, http, tls	2026-01-17
NetSupport RAT	3	command and control	http	183	actions on objectives, command and control, exploitation, installation	dns, http, tls	2026-01-13
SocGholish	15	command and control	dns, tls, http	2002	actions on objectives, command and control, delivery, exploitation, reconnaissance	dns, http, tcp, tcp-pkt, tls	2026-01-16
Unknown APT	1	command and control	http	1867	actions on objectives, command and control, delivery	dns, http, tcp, tls	2026-01-13
XWorm	70	command and control	tcp-pkt	4383	command and control, delivery	dns, http, tcp, tcp-pkt, tls	2026-01-17

 

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