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: 1435

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 (Silent Grabber, CastleBot)
Major changes to detections(s) [2]: 136
Updated threat detection(s) [3]: 140

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:

Silent Grabber (Data Theft)

Silent Grabber is an open source infostealer for 'education only' that targets crypto wallets, system files, browser credentials, VPN credentials, games, and social media accounts. It has persistence techniques and bypasses EDR detection.

Silent Grabber - Github |

Total number of detection methods: 2
Kill chain phase(s): actions on objectives
MITRE ATT&CK: T1071

CastleBot (Botnet)

CastleBot malware framework is a part of Malware-as-a-Service operation. Distributed through fake websites, it targets victims with trojanized software installers, enabling precise deployment of various malware types.

Total number of detection methods: 3
Kill chain phase(s): command and control, actions on objectives
MITRE ATT&CK: T1071

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):

AsyncRAT (RAT)

RAT is a tool that enables remote user control over a system. Adversaries can use existing, modify, or create their own RATs for unauthorized access or malicious activities.

Added kill chain phase(s): installation
Previously supported kill chain phase(s): command and control, delivery
MITRE ATT&CK added: T1105
Previously existing MITRE ATT&CK: T1071, T1587, T1203
Methods added: 1

AutoIt (Backdoor)

AutoIt backdoor, used in MONSOON campaign, exploits CVE-2014-6352 in weaponized .pps files. It utilizes the legitimate AutoIt scripting language for GUI automation on Windows.

Added kill chain phase(s): delivery
Previously supported kill chain phase(s): command and control, actions on objectives, delivery, installation
MITRE ATT&CK added: T1105
Previously existing MITRE ATT&CK: T1071, T1041
Methods added 1

CastleLoader (Loader)

CastleLoader is a loader malware that surfaced in early 2025, distributing information stealers and RATs through Cloudflare-themed phishing attacks and fake Github repositories.

Added kill chain phase(s): delivery, command and control
Previously supported kill chain phase(s): command and control, actions on objectives, delivery
MITRE ATT&CK added: T1105
Previously existing MITRE ATT&CK: T1071, T1189
Methods added: 2

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, delivery
Previously supported kill chain phase(s): command and control, actions on objectives, delivery, installation
MITRE ATT&CK added: T1496, T1071
Previously existing MITRE ATT&CK: T1071, T1587, T1573, T1566, T1486, T1496
Methods added: 34

Doina Loader (Loader)

Loaders are remote access Trojans allowing attackers to control compromised computers. These often lightweight to avoid detection by security technology, some now include advanced features like UI and self-healing capabilities.

Added kill chain phase(s): delivery
Previously supported kill chain phase(s): command and control
MITRE ATT&CK added: T1105
Previously existing MITRE ATT&CK: T1071
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: 3

GALLIUM (APT)

GALLIUM is an active threat group since 2012, targeting telecommunications networks. Suspected to be Chinese state-sponsored due to tools and tactics used.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control
Methods added: 2

Hangover (APT)

Patchwork and Operation Hangover are likely conducted by the same actors, according to MITRE.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control, actions on objectives, delivery, installation
MITRE ATT&CK added: T1071
Previously existing MITRE ATT&CK: T1041, T1071
Methods added: 1

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): delivery, actions on objectives
Previously supported kill chain phase(s): command and control, actions on objectives, delivery
MITRE ATT&CK added: T1105
Previously existing MITRE ATT&CK: T1041, T1071
Methods added: 2

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: 12

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: 18

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
Methods added: 6

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: 8

ReverseLoader (Loader)

Loaders are basic remote access Trojans allowing attackers to control compromised computers or bots. They are traditionally lightweight to avoid detection, but can evolve with added features for cybercriminals.

Added kill chain phase(s): delivery
Previously supported kill chain phase(s): delivery
MITRE ATT&CK added: T1105
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
MITRE ATT&CK added: T1189
Previously existing MITRE ATT&CK: T1071, T1027, T1189
Methods added: 18

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
Previously supported kill chain phase(s): actions on objectives, command and control, installation, delivery, exploitation
MITRE ATT&CK added: T1071
Previously existing MITRE ATT&CK: T1071, T1005, T1041, T1567, T1486, T1587, T1496
Methods added: 1

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: 24

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
AsyncRAT	1	installation	http	478	command and control, delivery, installation	dns, http, tcp, tcp-pkt, tls	2025-08-29
AutoIt	1	delivery	http	69	actions on objectives, command and control, delivery, installation	dns, http, tcp, tcp-pkt	2025-08-30
CastleBot	2	command and control, actions on objectives	http	3	command and control, actions on objectives	http	2025-08-29
CastleLoader	2	delivery, command and control	http	6	actions on objectives, command and control, delivery	http	2025-08-29
Command and Control	34	command and control, delivery	tls	598	actions on objectives, command and control, delivery, installation	dns, http, icmp, tcp, tcp-pkt, tls	2025-08-29
Doina Loader	1	delivery	http	10	command and control, delivery	dns, http, tls	2025-08-26
Fake Browser	3	exploitation	dns, tls, http	1733	command and control, delivery, exploitation	dns, http, tls	2025-08-28
GALLIUM	2	command and control	http	18	command and control	dns, http, tls	2025-08-29
Hangover	1	command and control	http	79	actions on objectives, command and control, delivery, installation	dns, http, tcp, tls	2025-08-29
Kimsuky	2	delivery, actions on objectives	http	387	actions on objectives, command and control, delivery	dns, ftp, ftp-data, http, tcp, tls	2025-08-29
LandUpdate808	12	command and control	dns, tls, http	538	command and control, delivery	dns, http, tls	2025-08-30
Lumma	18	command and control, actions on objectives	dns, tls, http	6713	actions on objectives, command and control, delivery, installation	dns, http, tls	2025-08-30
MuddyWater	6	command and control	dns, tls, http	83	actions on objectives, command and control, delivery	dns, http, tcp, tls	2025-08-26
RAT Generic	8	command and control	tcp	298	actions on objectives, command and control, delivery, installation	dns, http, tcp, tcp-pkt, tls, udp	2025-08-30
ReverseLoader	2	delivery	http	6	delivery	http	2025-08-29
Silent Grabber	2	actions on objectives	http	2	actions on objectives	http	2025-08-29
SocGholish	18	command and control	dns, tls, http	1733	actions on objectives, command and control, delivery, exploitation, reconnaissance	dns, http, tcp, tcp-pkt, tls	2025-08-30
Stealer and Exfiltration	1	actions on objectives	http	466	actions on objectives, command and control, delivery, exploitation, installation	dns, ftp, http, smtp, tcp, tcp-pkt, tls	2025-08-28
XWorm	24	command and control	tcp-pkt	3899	command and control, delivery	dns, http, tcp, tcp-pkt, tls	2025-08-27

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