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: 1742

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

New methods additions on existing threats [2]: 303
New detection methods in total [3]: 303

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

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):

ACR Stealer (Data Theft)

ACR Stealer is a Malware-as-a-Service offered by threat actor SheldIO on Russian cybercrime forums since March 2024, possibly related to a previous private stealer program.

Added kill chain phase(s): command and control, actions on objectives
Previously supported kill chain phase(s): delivery, command and control, actions on objectives
MITRE ATT&CK added: T1071
Previously existing MITRE ATT&CK: T1041, T1071
Methods added: 10

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): delivery, exploitation, installation, command and control
MITRE ATT&CK added: T1189
Previously existing MITRE ATT&CK: T1027, T1036, T1071, T1102, T1105, T1189, T1190, T1566
Methods added: 3

Cobalt Strike (Pentest Tools)

Cobalt Strike is a commercial penetration testing tool that simulates advanced threat actor attacks, covering the full range of ATT&CK tactics and integrating with tools like Metasploit and Mimikatz.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): delivery, exploitation, command and control, actions on objectives
MITRE ATT&CK added: T1041
Previously existing MITRE ATT&CK: T1001, T1041, T1071, T1587
Methods added: 4

Command and Control (Generic CnC)

Adversaries may use custom command and control protocols to communicate, mimicking or developing protocols on top of standard network stacks, instead of using existing Standard Application Layer Protocols.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): delivery, installation, command and control, actions on objectives
MITRE ATT&CK added: T1071
Previously existing MITRE ATT&CK: T1041, T1071, T1105, T1486, T1496, T1566, T1573, T1587
Methods added: 7

DarkCloud (Data Theft)

Info stealers are malware that collect data on an infected computer and send it to attackers. They steal information like credentials through various methods like keylogging or form grabbing.

Added kill chain phase(s): actions on objectives
Previously supported kill chain phase(s): actions on objectives
Methods added: 1

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, exploitation, command and control, actions on objectives
MITRE ATT&CK added: T1189
Previously existing MITRE ATT&CK: T1071, T1105, T1189
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): delivery, installation, command and control, actions on objectives
MITRE ATT&CK added: T1071
Previously existing MITRE ATT&CK: T1005, T1071, T1105, T1573
Methods added: 36

Malicious DGA Domain (Generic CnC)

Malicious domains are used by threat actors for malware spreading and phishing. C2 servers are established worldwide to evade detection. DGA generates domain names for command and control, challenging security professionals. Stamus Networks offers specialized detection methods.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control
Methods added: 72

Misconfigured Application (Potential data leakage)

Misconfigured applications open the door for data breaches, unauthorized access, financial losses, and reputational damage. Vulnerabilities provide easy entry points for attackers, leading to costly breaches and compromised systems.

Added kill chain phase(s): pre condition
Previously supported kill chain phase(s): pre condition
Methods added: 7

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): exploitation, installation, command and control, actions on objectives
MITRE ATT&CK added: T1105
Previously existing MITRE ATT&CK: T1071, T1105
Methods added: 1

Powershell (Lateral Movement)

Adversaries can abuse PowerShell for execution, discovery, and code running. Examples include Start-Process and Invoke-Command cmdlets, requiring administrator permissions for remote connections.

Added kill chain phase(s): delivery
Previously supported kill chain phase(s): delivery, installation, command and control, actions on objectives
MITRE ATT&CK added: T1105
Previously existing MITRE ATT&CK: T1027, T1041, T1071, T1105
Methods added: 5

PureRAT (RAT)

PureRAT and ResolverRAT are the same malware, while PureHVNC is its predecessor. Threat intel companies and researchers use all three names to refer to the same malware family.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control
Methods added: 1

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): reconnaissance, delivery, exploitation, command and control, actions on objectives
Previously existing MITRE ATT&CK: T1027, T1071, T1189
Methods added: 24

XRat (RAT)

RATs are software that enable remote users to control systems. Adversaries can use, modify, or create RATs to gain unauthorized access to systems.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control
MITRE ATT&CK added: T1041
Previously existing MITRE ATT&CK: T1041, T1071
Methods added: 13

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): delivery, command and control
MITRE ATT&CK added: T1573
Previously existing MITRE ATT&CK: T1071, T1573
Methods added: 98

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 methods	Kill chain phases	Protocols	Methods	Kill chain phases	Protocols
ACR Stealer	10	command and control, actions on objectives	dns, http, tls	92	delivery, command and control, actions on objectives	dns, http, http1, tls	2026-09-16
ClickFix	3	delivery	dns, http, tls	820	delivery, exploitation, installation, command and control	dns, http, tls	2026-09-10
Cobalt Strike	4	command and control	dns, http, http1, tls	612	delivery, exploitation, command and control, actions on objectives	dns, http, http1, smb, tcp, tls, udp	2026-09-11
Command and Control	7	command and control	dns, http, tls	662	delivery, installation, command and control, actions on objectives	dns, http, http1, icmp, tcp, tcp-pkt, tls	2026-09-12
DarkCloud	1	actions on objectives	smtp	9	actions on objectives	http, smtp	2026-09-15
LandUpdate808	21	command and control	dns, http, tls	1216	delivery, exploitation, command and control, actions on objectives	dns, http, tls	2026-09-12
Lumma	36	command and control, actions on objectives	dns, http, tls	8683	delivery, installation, command and control, actions on objectives	dns, http, tls	2026-09-15
Malicious DGA Domain	72	command and control	http, tls	349	command and control	http, tls	2026-09-09
Misconfigured Application	7	pre condition	tcp	33	pre condition	smtp, tcp	2026-09-09
NetSupport RAT	1	command and control	http	243	exploitation, installation, command and control, actions on objectives	dns, http, tls	2026-09-15
Powershell	5	delivery	http	77	delivery, installation, command and control, actions on objectives	dns, http, http1, tcp, tcp-pkt, tls	2026-09-10
PureRAT	1	command and control	tls	2	command and control	tls	2026-09-11
SocGholish	24	command and control	dns, http, tls	2503	reconnaissance, delivery, exploitation, command and control, actions on objectives	dns, http, tcp, tcp-pkt, tls	2026-09-16
XRat	13	command and control	tcp	37	command and control	dns, http, http1, icmp, tcp, tcp-pkt, tls	2026-09-15
XWorm	98	command and control	tcp-pkt	5880	delivery, command and control	dns, http, tcp, tcp-pkt, tls	2026-09-15

Threat Detection Update