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: 1239

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]: 0
Major changes to detections(s) [2]: 299
Updated threat detection(s) [3]: 299

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):

Banker Stealer (Data Theft)

Info stealers are malware that gather data from infected computers and send it to attackers. They use methods like browser hooking, web injection scripts, form grabbing, keylogging, and stealing saved passwords.

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: T1041, T1071
Methods added: 3

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
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: 18

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
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): actions on objectives, command and control, installation, delivery
MITRE ATT&CK added: T1071
Previously existing MITRE ATT&CK: T1005, T1071, T1573
Methods added: 156

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: 4

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: 2

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): installation, command and control, actions on objectives, delivery
MITRE ATT&CK added: T1573
Previously existing MITRE ATT&CK: T1071, T1041, T1573
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): command and control, exploitation, delivery, reconnaissance, actions on objectives
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): delivery
Previously supported kill chain phase(s): delivery
Methods added: 6

TA582 (APT)

An APT is a stealthy threat actor, often nation state or state-sponsored, gaining unauthorized access and remaining undetected in a network for political or economic reasons, targeting various sectors.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control
Methods added: 39

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: 42

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
Banker Stealer	3	command and control	dns, http, tls	409	actions on objectives, command and control, delivery	dns, http, smtp, tcp, tls	2024-12-28
ClickFix	1	delivery	http	54	command and control, delivery, exploitation	dns, http, tls	2024-12-24
Fake Browser	18	exploitation	dns, tls, http	1293	command and control, delivery, exploitation	dns, http, tls	2024-12-28
LandUpdate808	21	command and control	dns, tls, http	143	command and control, delivery	dns, http, tls	2024-12-28
Lumma	156	command and control, actions on objectives	dns, tls, http	3364	actions on objectives, command and control, delivery, installation	dns, http, tls	2024-12-28
Malicious DGA Domain	4	command and control	http, tls	130	command and control	http, tls	2024-12-24
NetSupport RAT	2	command and control	http	67	actions on objectives, command and control, exploitation, installation	dns, http, tls	2024-12-27
RAT Generic	1	command and control	tcp	189	actions on objectives, command and control, delivery, installation	dns, http, tcp, tcp-pkt, tls, udp	2024-12-25
SocGholish	6	command and control	dns, tls, http	1206	actions on objectives, command and control, delivery, exploitation, reconnaissance	dns, http, tcp, tcp-pkt, tls	2024-12-27
TA4903	6	delivery	dns, tls, http	1234	delivery	dns, http, tls	2024-12-24
TA582	39	command and control	dns, http, tls	622	command and control	dns, http, tls	2024-12-28
XWorm	42	command and control	tcp-pkt	2061	command and control, delivery	dns, http, tcp, tcp-pkt, tls	2024-12-27

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