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: 1606

 

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]: 1 (DoHDoor)

• Major changes to detections(s) [2]: 320

• Updated threat detection(s) [3]: 322

 

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:

 

DoHDoor (Backdoor)

The Dohdoor malware campaign uses social engineering and DNS-over-HTTPS techniques to establish a backdoor into victims' systems, enabling the download and execution of malicious payloads.

• Total number of detection methods: 2

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

 

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

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

• MITRE ATT&CK added: T1041

• Previously existing MITRE ATT&CK: T1071, T1041

• Methods added: 1

 

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: 14

 

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: 87

 

Mirai (Botnet)

Mirai is malware that infects Linux devices to create a botnet for large-scale attacks. It targets online consumer devices like IP cameras and routers, leading to major DDoS attacks.

• Added kill chain phase(s): command and control

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

• MITRE ATT&CK added: T1041

• Previously existing MITRE ATT&CK: T1071

• Methods added: 15

 

Mustang Panda (APT)

Mustang Panda is a China-based cyber threat actor observed since 2017, possibly operating since 2014. It targets government and non-government organizations in multiple countries like the U.S., Germany, and Myanmar.

• Added kill chain phase(s): command and control

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

• MITRE ATT&CK added: T1071

• Previously existing MITRE ATT&CK: T1071, T1587, T1041, T1567, T1102

• Methods added: 1

 

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: 8

 

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, delivery

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

• Methods added: 28

 

TA2726 (APT)

TA2726 serves as a TDS for TA2727 and TA569, distributing SocGholish malware that pretends to be a browser update on compromised sites.

• Added kill chain phase(s): command and control

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

• Methods added: 27

 

TA455 (APT)

Meta took action against a hacking group from Iran that targeted various industries worldwide. The group's tactics resembled another threat actor, but with different targets, infrastructure, and malware.

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

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

• MITRE ATT&CK added: T1071, T1041

• Previously existing MITRE ATT&CK: T1071, T1583, T1102

• Methods added: 10

 

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

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

• MITRE ATT&CK added: T1566, T1041

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

• Methods added: 11

 

Wintervivern (APT)

"DomainTools Research team discovers malicious Microsoft Excel documents using XLM 4.0 macros for C2 communications in various countries, dubbed as "Winter Vivern".

• Added kill chain phase(s): command and control

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

• Methods added: 3

 

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: 97

 

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
ACR Stealer	1	command and control	tls	82	actions on objectives, command and control, delivery	dns, http, tls	2026-03-18
DoHDoor	2	delivery, command and control	http	2	delivery, command and control	http	2026-03-18
Fake Browser	12	exploitation	dns, tls, http	1945	command and control, delivery, exploitation	dns, http, tls	2026-03-21
LandUpdate808	14	command and control	dns, tls, http	886	command and control, delivery	dns, http, tls	2026-03-20
Lumma	87	command and control, actions on objectives	dns, tls, http	7777	actions on objectives, command and control, delivery, installation	dns, http, tls	2026-03-21
Mirai	15	command and control	dns, tls, http	305	actions on objectives, command and control, delivery, reconnaissance	dns, http, tcp, tcp-pkt, tls	2026-03-18
Mustang Panda	1	command and control	http	369	command and control, delivery	dns, http, tcp, tls	2026-03-18
NetSupport RAT	8	command and control	http	205	actions on objectives, command and control, exploitation, installation	dns, http, tls	2026-03-21
SocGholish	28	command and control, delivery	dns, tls, http	2144	actions on objectives, command and control, delivery, exploitation, reconnaissance	dns, http, tcp, tcp-pkt, tls	2026-03-21
TA2726	27	command and control	dns, tls, http	186	command and control	dns, http, tls	2026-03-17
TA455	10	command and control, actions on objectives	dns, tls, http	730	actions on objectives, command and control, installation	dns, http, tls	2026-03-21
TA4903	6	delivery	dns, tls, http	2471	delivery	dns, http, tls	2026-03-18
Unknown APT	11	delivery, command and control	dns, tls, http	1919	actions on objectives, command and control, delivery	dns, http, tcp, tls	2026-03-20
Wintervivern	3	command and control	dns, tls, http	55	actions on objectives, command and control, delivery, exploitation	dns, http, tls	2026-03-18
XWorm	97	command and control	tcp-pkt	4832	command and control, delivery	dns, http, tcp, tcp-pkt, tls	2026-03-21

 

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