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: 1307

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 (TINYSHELL, Reverse Shell - Unix)
Major changes to detections(s) [2]: 274
Updated threat detection(s) [3]: 279

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:

TINYSHELL (Backdoor)

TINYSHELL is a lightweight backdoor written in C with commands for file upload, download, and remote shell sessions. A basic FreeBSD implementation may be modified for customized backdoors.

TINYSHELL - Malpedia |

Total number of detection methods: 4
Kill chain phase(s): command and control
MITRE ATT&CK: T1071

Reverse Shell - Unix (Reverse Shell)

Adversaries exploit command and script interpreters in various platforms to execute commands, scripts, and binaries, utilizing built-in interfaces like Unix Shell, Windows Command Shell, and PowerShell. Provides ways of interacting with systems.

Total number of detection methods: 1
Kill chain phase(s): actions on objectives

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): command and control
Previously supported kill chain phase(s): command and control, delivery
MITRE ATT&CK added: T1102, T1071
Previously existing MITRE ATT&CK: T1041, T1071, T1587, T1566, T1583, T1665, T1102
Methods added: 18

Amadey (Data Theft)

Amadey is a trojan that cyber criminals can buy on a Russian dark web forum to perform malicious activities like stealing personal information, installing malware, and adding computers to a botnet.

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
Methods added: 1

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: 31

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: 72

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
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: 4

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: 15

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: 3

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: 3

Trojan Agent (Trojan)

A group of trojans with variable payloads can redirect web traffic, manipulate applications, drop/install malicious programs, and download/run additional malware. Behavior is not exhaustive.

Added kill chain phase(s): command and control
Previously supported kill chain phase(s): command and control, actions on objectives, delivery, installation
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: 123

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
APT35	18	command and control	dns, tls, http	1656	command and control, delivery	dns, ftp, http, tcp, tls, udp	2025-03-19
Amadey	1	command and control	http	30	actions on objectives, command and control, delivery	dns, http, tls	2025-03-21
LandUpdate808	31	command and control	dns, tls, http	332	command and control, delivery	dns, http, tls	2025-03-22
Lumma	72	command and control, actions on objectives	dns, tls, http	4905	actions on objectives, command and control, delivery, installation	dns, http, tls	2025-03-21
NetSupport RAT	1	command and control	http	93	actions on objectives, command and control, exploitation, installation	dns, http, tls	2025-03-22
RAT Generic	4	command and control	tcp	239	actions on objectives, command and control, delivery, installation	dns, http, tcp, tcp-pkt, tls, udp	2025-03-21
Reverse Shell - Unix	1	actions on objectives	tcp-pkt	1	actions on objectives	tcp-pkt	2025-03-20
SocGholish	15	command and control	dns, tls, http	1371	actions on objectives, command and control, delivery, exploitation, reconnaissance	dns, http, tcp, tcp-pkt, tls	2025-03-22
Stealer and Exfiltration	3	actions on objectives	http	456	actions on objectives, command and control, delivery, exploitation, installation	dns, ftp, http, smtp, tcp, tcp-pkt, tls	2025-03-20
TA455	3	command and control	dns, tls, http	554	command and control, installation	dns, http, tls	2025-03-19
TINYSHELL	4	command and control	udp, icmp	4	command and control	udp, icmp	2025-03-20
Trojan Agent	3	command and control	dns, tls, http	606	actions on objectives, command and control, delivery, installation	dns, http, ip, smtp, tcp, tcp-pkt, tcp-stream, tls, udp	2025-03-20
XWorm	123	command and control	tcp-pkt, http	2681	command and control, delivery	dns, http, tcp, tcp-pkt, tls	2025-03-21

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