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: 1580

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]: 4 (Odyssey Stealer, DigitStealer, MacSync, AstarionRAT)
Major changes to detections(s) [2]: 322
Updated threat detection(s) [3]: 404

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:

Odyssey Stealer (Data Theft)

Odyssey Stealer is a macOS information stealer targeting cryptocurrencies, operating as a Malware-as-a-Service platform with affiliates. It exfiltrates credentials from crypto software, including browser and desktop wallets, and acts as a remote access trojan.

Total number of detection methods: 13
Kill chain phase(s): command and control, delivery, actions on objectives
MITRE ATT&CK: T1005, T1041

DigitStealer (Data Theft)

DigitStealer is a new malware targeting cryptocurrency wallets and MacOS devices, with no web panel for sharing access. It lands on systems through popular app spoofing, targeting Apple M2 devices specifically. Operates as a backdoor with multiple payloads.

Total number of detection methods: 51
Kill chain phase(s): command and control
MITRE ATT&CK: T1041

MacSync (Data Theft)

In April 2025, a new developer named "mentalpositive" released mac.c, a cheap macOS stealer. One month later, it was rebranded as MacSync with enhanced capabilities, becoming a more sophisticated malware.

Total number of detection methods: 14
Kill chain phase(s): command and control, delivery, actions on objectives

AstarionRAT (Data Theft)

AstarionRAT is a powerful RAT with various malicious capabilities, including credential theft and encrypted C2 communication, disguised as application telemetry.

Total number of detection methods: 4
Kill chain phase(s): command and control
MITRE ATT&CK: T1041

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: T1071
Previously existing MITRE ATT&CK: T1071, T1041
Methods added: 2

APT35 (APT)

Iranian-backed group Magic Hound engages in cyber espionage targeting U.S. and Middle Eastern officials and organizations since 2014, likely working with the Islamic Revolutionary Guard Corps through elaborate social engineering tactics.

Added kill chain phase(s): delivery
Previously supported kill chain phase(s): command and control, delivery, actions on objectives
MITRE ATT&CK added: T1566
Previously existing MITRE ATT&CK: T1041, T1071, T1587, T1566, T1665, T1102
Methods added: 4

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): exploitation, delivery, command and control
MITRE ATT&CK added: T1189
Previously existing MITRE ATT&CK: T1071, T1027, T1189, T1102, T1566, T1036, T1105
Methods added: 20

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: 6

Kimsuky (APT)

Kimsuky, a North Korean threat group since 2013, targets think tanks and nuclear-related entities. Recently expanded to US, Russia, Europe; known for Korea Hydro & Nuclear Power Co. compromise.

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: T1041, T1071, T1105
Methods added: 3

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: 6

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: 51

Matanbuchus (Trojan)

BelialDemon launched Matanbuchus Loader, a malware-as-a-service for $2,500, to distribute second-stage malware. Malware loaders download malicious software from command and control servers.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control, delivery
MITRE ATT&CK added: T1041
Previously existing MITRE ATT&CK: T1041
Methods added: 3

MuddyWater (APT)

MuddyWater is an Iranian threat group targeting mainly Middle Eastern nations, with victims in telecommunications, government, and oil sectors. Previously linked to FIN7, now believed to be a distinct group for espionage.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control, delivery, actions on objectives
MITRE ATT&CK added: T1071
Previously existing MITRE ATT&CK: T1071
Methods added: 22

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: 1

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, delivery
Previously supported kill chain phase(s): installation, command and control, actions on objectives, delivery
MITRE ATT&CK added: T1071, T1105, T1041
Previously existing MITRE ATT&CK: T1071, T1041, T1573
Methods added: 36

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: 6

Trojan Downloader (Downloader)

Trojan downloaders are malicious software that look legitimate, but can harm your computer by downloading files, often without user consent, to steal, damage, or disrupt your devices.

Added kill chain phase(s): delivery
Previously supported kill chain phase(s): command and control, delivery, actions on objectives, installation
Methods added: 21

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, installation, delivery, actions on objectives
Previously supported kill chain phase(s): command and control, delivery, actions on objectives
MITRE ATT&CK added: T1105, T1041
Previously existing MITRE ATT&CK: T1041, T1071, T1001, T1566, T1102
Methods added: 71

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
ACR Stealer	2	command and control	http	81	actions on objectives, command and control, delivery	dns, http, tls	2026-02-18
APT35	4	delivery	http	1987	actions on objectives, command and control, delivery	dns, ftp, http, tcp, tls, udp	2026-02-21
AstarionRAT	4	command and control	http, dns, tls	4	command and control	http, dns, tls	2026-02-20
ClickFix	20	delivery	dns, tls, http	293	command and control, delivery, exploitation	dns, http, tls	2026-02-19
DigitStealer	51	command and control	dns, tls, http	51	command and control	dns, tls, http	2026-02-20
Fake Browser	6	exploitation	dns, tls, http	1921	command and control, delivery, exploitation	dns, http, tls	2026-02-20
Kimsuky	3	command and control	dns, tls, http	412	actions on objectives, command and control, delivery	dns, ftp, ftp-data, http, tcp, tls	2026-02-21
LandUpdate808	6	command and control	dns, tls, http	836	command and control, delivery	dns, http, tls	2026-02-20
Lumma	51	command and control, actions on objectives	dns, tls, http	7552	actions on objectives, command and control, delivery, installation	dns, http, tls	2026-02-21
MacSync	14	command and control, delivery, actions on objectives	dns, tls, http	14	command and control, delivery, actions on objectives	dns, tls, http	2026-02-20
Matanbuchus	3	command and control	dns, tls, http	24	command and control, delivery	dns, http, tls	2026-02-18
MuddyWater	22	command and control	http, dns, tls	121	actions on objectives, command and control, delivery	dns, http, tcp, tls	2026-02-21
NetSupport RAT	1	command and control	http	193	actions on objectives, command and control, exploitation, installation	dns, http, tls	2026-02-20
Odyssey Stealer	13	command and control, delivery, actions on objectives	http, dns, tls	13	command and control, delivery, actions on objectives	http, dns, tls	2026-02-20
RAT Generic	36	command and control, delivery	http, dns, tls	385	actions on objectives, command and control, delivery, installation	dns, http, tcp, tcp-pkt, tls, udp	2026-02-20
SocGholish	6	command and control	dns, tls, http	2078	actions on objectives, command and control, delivery, exploitation, reconnaissance	dns, http, tcp, tcp-pkt, tls	2026-02-17
Trojan Downloader	21	delivery	dns, tls, http	429	actions on objectives, command and control, delivery, installation	dns, http, tcp, tls, udp	2026-02-21
Unknown APT	71	command and control, installation, delivery, actions on objectives	dns, tls, http	2009	actions on objectives, command and control, delivery, installation	dns, http, tcp, tls	2026-02-20
XWorm	70	command and control	tcp-pkt	4557	command and control, delivery	dns, http, tcp, tcp-pkt, tls	2026-02-21

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