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: 1751

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 (PATCHCORD, BlueMoon, Webshell Generic)
New methods additions on existing threats [2]: 247
New detection methods in total [3]: 309

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 Stamus NDR this past week:

BlueMoon (Exploit Kit)

Proofpoint discovered four espionage-motivated threat actors using a new exploit kit named BlueMoon, which targets Chrome browser and Windows vulnerabilities. Initially associated with China-aligned groups, the exploit kit is expected to be adopted by other threat actors as patches are implemented.

Total number of detection methods: 6
Kill chain phase(s): command and control

PATCHCORD (Backdoor)

Acronis TRU discovered PATCHCORD backdoor targeting Afghan telecom providers and South Asian critical infrastructure. SHEETCORD was found in infrastructure, abusing Google Sheets for communication, distributed through fake VPN installers.

Total number of detection methods: 1
Kill chain phase(s): command and control
MITRE ATT&CK: T1071

Webshell Generic (Backdoor)

A webshell is a malicious script that acts as a backdoor on a compromised web server, granting attackers remote control. They exploit vulnerabilities to blend in with legitimate web traffic.

Total number of detection methods: 55
Kill chain phase(s): actions on objectives
MITRE ATT&CK: T1505

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):

CastleLoader (Loader)

CastleLoader is a loader malware that surfaced in early 2025, distributing information stealers and RATs through Cloudflare-themed phishing attacks and fake Github repositories.

Added kill chain phase(s): delivery
Previously supported kill chain phase(s): delivery, command and control, actions on objectives
MITRE ATT&CK added: T1105
Previously existing MITRE ATT&CK: T1041, T1071, T1105, T1189
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): 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: 174

Emotet (Data Theft)

Emotet is a versatile malware used for downloading other malicious software, especially targeting the banking sector. It first appeared in 2014 and is often linked to TrickBot and IcedID.

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: T1071
Previously existing MITRE ATT&CK: T1041
Methods added: 7

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: 3

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: 9

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
Previously supported kill chain phase(s): delivery, command and control, actions on objectives
MITRE ATT&CK added: T1071, T1486
Previously existing MITRE ATT&CK: T1071, T1105, T1486, T1573
Methods added: 4

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): delivery, installation, command and control, actions on objectives
Previously existing MITRE ATT&CK: T1005, T1041, T1071, T1105, T1573
Methods added: 24

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: 15

Stealer and Exfiltration (Data Theft)

Info stealers gather sensitive data on infected computers to send to attackers, typically targeting online banking, social media, email, and FTP accounts. They use various methods including hooking browsers and keylogging.

Added kill chain phase(s): delivery, command and control, actions on objectives
Previously supported kill chain phase(s): delivery, exploitation, installation, command and control, actions on objectives
MITRE ATT&CK added: T1041, T1105
Previously existing MITRE ATT&CK: T1005, T1041, T1071, T1095, T1105, T1486, T1496, T1567, T1587
Methods added: 6

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): command and control
Previously supported kill chain phase(s): delivery
MITRE ATT&CK added: T1071
Previously existing MITRE ATT&CK: T1071, T1566
Methods added: 2

Trojan Dropper (Trojan)

Dropper is a type of Trojan that installs malware on a system. It can hide the malware within itself or download it to the target machine once activated.

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: T1041, T1071, T1105, T1496
Methods added: 2

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
BlueMoon	6	command and control	dns, http, tls	6	command and control	dns, http, tls	2026-09-24
CastleLoader	1	delivery	http	11	delivery, command and control, actions on objectives	http, http1, tcp	2026-09-25
ClickFix	174	delivery	dns, http, tls	994	delivery, exploitation, installation, command and control	dns, http, tls	2026-09-25
Emotet	7	command and control	http	77	delivery, exploitation, command and control, actions on objectives	dns, http, http1, smb, tls	2026-09-22
LandUpdate808	3	command and control	dns, http, tls	1222	delivery, exploitation, command and control, actions on objectives	dns, http, tls	2026-09-24
Lumma	9	command and control, actions on objectives	dns, http, tls	8695	delivery, installation, command and control, actions on objectives	dns, http, tls	2026-09-25
PATCHCORD	1	command and control	http	1	command and control	http	2026-09-24
Ransomware Generic	4	command and control	dns, http	51	delivery, command and control, actions on objectives	dns, http, http1, tls	2026-09-24
RAT Generic	24	command and control	dns, http, tls	510	delivery, installation, command and control, actions on objectives	dns, http, http1, tcp, tcp-pkt, tls, udp	2026-09-24
SocGholish	15	command and control	dns, http, tls	2524	reconnaissance, delivery, exploitation, command and control, actions on objectives	dns, http, tcp, tcp-pkt, tls	2026-09-26
Stealer and Exfiltration	6	delivery, command and control, actions on objectives	http, tcp-pkt	548	delivery, exploitation, installation, command and control, actions on objectives	dns, ftp, http, http1, smtp, tcp, tcp-pkt, tls	2026-09-24
TA4903	2	command and control	http	2515	delivery, command and control	dns, http, tls	2026-09-22
Trojan Dropper	2	delivery	http	433	delivery, installation, command and control, actions on objectives	dns, http, http1, tcp, tls, udp	2026-09-25
Webshell Generic	55	actions on objectives	http	55	actions on objectives	http	2026-09-24

Threat Detection Update