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: 1419

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]: 2 (Rainbow Hyena, APT storm-2603)
Major changes to detections(s) [2]: 268
Updated threat detection(s) [3]: 277

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 (formerly Stamus Security Platform) this past week:

Rainbow Hyena (Backdoor)

BI.ZONE Mail Security detected a wave of phishing emails targeting Russian healthcare and IT organizations using masquerading techniques like polyglot files and LNK files. Hacktivist groups are adopting more sophisticated methods for espionage and financial gain.

Total number of detection methods: 2
Kill chain phase(s): command and control
MITRE ATT&CK: T1071

APT storm-2603 (APT)

Microsoft identifies Storm-2603 as a China-based threat actor targeting on-premises SharePoint vulnerabilities. They have observed deployment of ransomware but are unsure of the actor's objectives.

APT storm-2603 - Checkpoint |

Total number of detection methods: 7
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):

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
MITRE ATT&CK added: T1566
Previously existing MITRE ATT&CK: T1041, T1071, T1587, T1566, T1665, T1102
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
MITRE ATT&CK added: T1189
Previously existing MITRE ATT&CK: T1071, T1027, T1189, T1102, T1036, T1105
Methods added: 1

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: 47

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: 2

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: 18

Stealerium (Data Theft)

Stealerium is a C# program that acts as a stealer, clipper, and keylogger, sending logs to a Discord channel via webhook. Available on GitHub.

Added kill chain phase(s): actions on objectives
Previously supported kill chain phase(s): command and control
MITRE ATT&CK added: T1071
Methods added: 4

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
Previously supported kill chain phase(s): command and control, installation
Methods added: 33

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: 3

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
Previously supported kill chain phase(s): command and control, delivery
Methods added: 132

Vidar (Data Theft)

Vidar Stealer is a trojan used by cyber criminals to steal personal information from infected computers.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control, installation, actions on objectives, delivery
Methods added: 6

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: 19

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
APT storm-2603	7	command and control	dns, http, tls	7	command and control	dns, http, tls	2025-08-05
APT35	3	delivery	dns, tls, http	1950	command and control, delivery	dns, ftp, http, tcp, tls, udp	2025-08-06
ClickFix	1	delivery	http	204	command and control, delivery, exploitation	dns, http, tls	2025-08-07
Lumma	47	command and control, actions on objectives	dns, tls, http	6635	actions on objectives, command and control, delivery, installation	dns, http, tls	2025-08-08
RAT Generic	2	command and control	tcp	288	actions on objectives, command and control, delivery, installation	dns, http, tcp, tcp-pkt, tls, udp	2025-08-05
Rainbow Hyena	2	command and control	http	2	command and control	http	2025-08-05
SocGholish	18	command and control	dns, tls, http	1688	actions on objectives, command and control, delivery, exploitation, reconnaissance	dns, http, tcp, tcp-pkt, tls	2025-08-09
Stealerium	4	actions on objectives	http, tcp	5	actions on objectives, command and control	http, tcp	2025-08-08
TA455	33	command and control	dns, tls, http	660	command and control, installation	dns, http, tls	2025-08-05
TA4903	3	delivery	dns, tls, http	2414	delivery	dns, http, tls	2025-08-05
Unknown APT	132	command and control	dns, tls, http	891	command and control, delivery	dns, http, tcp, tls	2025-08-06
Vidar	6	command and control	dns, tls, http	56	actions on objectives, command and control, delivery, installation	dns, http, tls	2025-08-05
XWorm	19	command and control	tcp-pkt	3795	command and control, delivery	dns, http, tcp, tcp-pkt, tls	2025-08-09

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