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: 1629

 

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]: 6 (LucidRook, XorBee, ShadowLink, TA2725, DonutLoader, VENOM PhaaS)

• Major changes to detections(s) [2]: 149

• Updated threat detection(s) [3]: 204

 

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:

 

LucidRook (Trojan)

LucidRook is advanced malware using Lua interpreter and Rust-compiled libraries in a DLL to download Lua bytecode payloads. LucidPawn drops it, with Taiwan-focused execution, via infected files and compromises servers for C2 communication.

• Total number of detection methods: 2

• Kill chain phase(s): actions on objectives, delivery

• MITRE ATT&CK: T1071

 

XorBee (RAT)

KongTuke malware infects legitimate websites, uses ClickFix to run XorBee RAT on Windows domain joined devices. XorBee RAT is a Python-based reverse shell for executing Powershell commands on victim's computer. Targeted at organizational victims.

• Total number of detection methods: 13

• Kill chain phase(s): command and control

• MITRE ATT&CK: T1041

 

ShadowLink (Botnet)

Tplink_stager.sh payload exploits CVE-2024-21833 on TP-Link routers, detects architecture, sets up SOCKS5 proxy using microsocks binary, and deploys ShadowLink beacon for post-exploitation. More info at Ctrlaltintel.

• Total number of detection methods: 5

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

• MITRE ATT&CK: T1041

 

TA2725 (APT)

TA2725 is a threat actor targeting organizations in Brazil, Mexico, Spain using Brazilian banking malware and phishing. They use GoDaddy virtual hosting, Amazon AWS, Google Cloud, Microsoft Azure for malicious files.

• Total number of detection methods: 1

• Kill chain phase(s): command and control

• MITRE ATT&CK: T1071

 

DonutLoader (Loader)

Donut is position-independent code for in-memory execution of various file types. Features include encryption, compression, API hash and string generation, PE header manipulation, and patching of security measures.

DonutLoader - Malpedia |

• Total number of detection methods: 1

• Kill chain phase(s): delivery

 

VENOM PhaaS (Phishing)

Credential theft campaign targets C-suite executives with personalized phishing emails impersonating SharePoint notifications, using a new platform called VENOM. VENOM is not publicly known or accessible through typical channels.

• Total number of detection methods: 33

• Kill chain phase(s): delivery

• MITRE ATT&CK: T1557

 

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):

 

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, actions on objectives

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

• MITRE ATT&CK added: T1041

• Previously existing MITRE ATT&CK: T1071, T1587, T1573, T1566, T1486, T1496, T1041

• 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: 21

 

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, exploitation, actions on objectives

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

• MITRE ATT&CK added: T1189, T1071

• Previously existing MITRE ATT&CK: T1189, T1105, T1071

• Methods added: 37

 

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: 45

 

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

 

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): actions on objectives, command and control

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

• MITRE ATT&CK added: T1005, T1071

• Previously existing MITRE ATT&CK: T1071, T1005, T1041, T1567, T1095, T1105, T1486, T1587, T1496

• Methods added: 14

 

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: 8

 

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
Command and Control	6	command and control, actions on objectives	tcp-pkt	650	actions on objectives, command and control, delivery, installation	dns, http, icmp, tcp, tcp-pkt, tls	2026-04-19
DonutLoader	1	delivery	http	1	delivery	http	2026-04-19
Fake Browser	21	exploitation	dns, tls, http	2005	command and control, delivery, exploitation	dns, http, tls	2026-04-17
LandUpdate808	37	command and control, exploitation, actions on objectives	dns, tls, http	926	actions on objectives, command and control, delivery, exploitation	dns, http, tls	2026-04-19
LucidRook	2	actions on objectives, delivery	ftp	2	actions on objectives, delivery	ftp	2026-04-15
Lumma	45	command and control, actions on objectives	dns, tls, http	7930	actions on objectives, command and control, delivery, installation	dns, http, tls	2026-04-18
NetSupport RAT	3	command and control	http	216	actions on objectives, command and control, exploitation, installation	dns, http, tls	2026-04-18
ShadowLink	5	command and control, installation	http	5	command and control, installation	http	2026-04-15
SocGholish	15	command and control	dns, tls, http	2204	actions on objectives, command and control, delivery, exploitation, reconnaissance	dns, http, tcp, tcp-pkt, tls	2026-04-18
Stealer and Exfiltration	14	actions on objectives, command and control	http, dns, tls	531	actions on objectives, command and control, delivery, exploitation, installation	dns, ftp, http, smtp, tcp, tcp-pkt, tls	2026-04-19
TA2725	1	command and control	http	1	command and control	http	2026-04-19
VENOM PhaaS	33	delivery	dns, tls, http	33	delivery	dns, tls, http	2026-04-19
XWorm	8	command and control	tcp-pkt	5043	command and control, delivery	dns, http, tcp, tcp-pkt, tls	2026-04-18
XorBee	13	command and control	dns, tcp-pkt, http, tls	13	command and control	dns, tcp-pkt, http, tls	2026-04-15

 

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