30-April-2024
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: 1032
This week, in addition to daily ruleset and IOC updates, we provided Stamus Security Platform customers with the following improved defense(s):
Note: a "method" as referenced below, is a discrete detection vector for a given threat.
The following detections were added to your Stamus Security Platform (SSP) this past week:
DiamondFox is highly modular malware offered as malware-as-a-service, and is for sale on various hacker forums. Therefore, cyber criminals who are willing to use DiamondFox do not necessarily require any technical knowledge to perform their attacks.
Once purchased, this malware can be used to log keystrokes, steal credentials (e.g., usernames, email addresses, passwords), hijack cryptocurrency wallets, perform distributed denial of service (DDoS) attacks, and to carry out other malicious tasks.
DiamondFox allows cyber criminals to choose which plug-ins to keep activated and see infection statistics in real-time. Pcrisk
The term info stealer is self-explanatory. This type of malware resides in an infected computer and gathers data in order to send it to the attacker. Typical targets are credentials used in online banking services, social media sites, emails, or FTP accounts.
Info stealers may use many methods of data acquisition. The most common are:
hooking browsers (and sometimes other applications) and stealing credentials that are typed by the user using web injection scripts that are adding extra fields to web forms and submitting information from them to a server owned by the attacker form grabbing (finding specific opened windows and stealing their content) keylogging stealing passwords saved in the system and cookies Modern info stealers are usually parts of botnets. Sometimes the target of attack and related events are configured remotely by the command sent from the Command and Control server (C&C). Malwarebytes
WaveStealer - Recorded Future Triage | WaveStealer - Twitter |
The following detections were updated this past week with changes to kill chain phase(s) or MITRE ATT&CK tactic(s)/technique(s):
Remote Access Trojans are programs that provide the capability to allow covert surveillance or the ability to gain unauthorized access to a victim PC. Remote Access Trojans often mimic similar behaviors of keylogger applications by allowing the automated collection of keystrokes, usernames, passwords, screenshots, browser history, emails, chat lots, etc. Remote Access Trojans differ from keyloggers in that they provide the capability for an attacker to gain unauthorized remote access to the victim machine via specially configured communication protocols which are set up upon initial infection of the victim computer. This backdoor into the victim machine can allow an attacker unfettered access, including the ability to monitor user behavior, change computer settings, browse and copy files, utilize the bandwidth (Internet connection) for possible criminal activity, access connected systems, and more. Malwarebytes
Attackers are utilizing hacked web sites that promote fake browser updates to infect targets with banking trojans. In some cases, post exploitation toolkits are later executed to encrypt the compromised network with ransomware.
Between May and September 2019, FireEye has conducted multiple incident response cases where enterprise customers were infected with malware through fake browser updates.
Hacked sites would display these "fakeupdates" through JavaScript alerts that state the user is using an old version of a web browser and that they should download an offered "update" to keep the browser running "smoothly and securely".
Cyber criminals violated the law TDS (Traffic Direction System) platform Keitaro and used it to redirect them users in exploit kits RIG and Fallout in order to infect them with malicious software.
TDS platforms are designed for redirection of users in particular sites. Legitimate TDS platforms, such as Keitaro, are mainly used by individuals and companies that want to advertise services or their products. Platforms drive users to the pages that companies want, targeting specific customers and promoting an ad campaign. techbizweb
Lumma is an information stealer written in C, sold as a Malware-as-a-Service by LummaC on Russian-speaking underground forums and Telegram since at least August 2022. Lumma's capabilities are those of a classic stealer, with a focus on cryptocurrency wallets, and file grabber capabilities. Malpedia
Remote Access Trojans are programs that provide the capability to allow covert surveillance or the ability to gain unauthorized access to a victim PC. Remote Access Trojans often mimic similar behaviors of keylogger applications by allowing the automated collection of keystrokes, usernames, passwords, screenshots, browser history, emails, chat lots, etc. Remote Access Trojans differ from keyloggers in that they provide the capability for an attacker to gain unauthorized remote access to the victim machine via specially configured communication protocols which are set up upon initial infection of the victim computer. This backdoor into the victim machine can allow an attacker unfettered access, including the ability to monitor user behavior, change computer settings, browse and copy files, utilize the bandwidth (Internet connection) for possible criminal activity, access connected systems, and more. Malwarebytes
Remote Access Trojans are programs that provide the capability to allow covert surveillance or the ability to gain unauthorized access to a victim PC. Remote Access Trojans often mimic similar behaviors of keylogger applications by allowing the automated collection of keystrokes, usernames, passwords, screenshots, browser history, emails, chat lots, etc. Remote Access Trojans differ from keyloggers in that they provide the capability for an attacker to gain unauthorized remote access to the victim machine via specially configured communication protocols which are set up upon initial infection of the victim computer. This backdoor into the victim machine can allow an attacker unfettered access, including the ability to monitor user behavior, change computer settings, browse and copy files, utilize the bandwidth (Internet connection) for possible criminal activity, access connected systems, and more. Malwarebytes
It leverages compromised websites and performs some of the most creative fingerprinting checks we’ve seen, before delivering its payload (NetSupport RAT). Malwarebytes
An advanced persistent threat (APT) is a stealthy computer network threat actor, typically a nation state or state-sponsored group, which gains unauthorized access to a computer network and remains undetected for an extended period. In recent times, the term may also refer to non-state sponsored groups conducting large-scale targeted intrusions for specific goals.
Such threat actors' motivations are typically political or economic. To date, every major business sector has recorded instances of attacks by advanced actors with specific goals seeking to steal, spy or disrupt. These include government, defense, financial services, legal services, industrial, telecoms, consumer goods, and many more. Some groups utilize traditional espionage vectors, including social engineering, human intelligence and infiltration to gain access to a physical location to enable network attacks. The purpose of these attacks is to place custom malicious code on one or multiple computers for specific tasks.
Source: Wikipedia
An advanced persistent threat (APT) is a stealthy computer network threat actor, typically a nation state or state-sponsored group, which gains unauthorized access to a computer network and remains undetected for an extended period. In recent times, the term may also refer to non-state sponsored groups conducting large-scale targeted intrusions for specific goals.
Such threat actors' motivations are typically political or economic. To date, every major business sector has recorded instances of attacks by advanced actors with specific goals seeking to steal, spy or disrupt. These include government, defense, financial services, legal services, industrial, telecoms, consumer goods, and many more. Some groups utilize traditional espionage vectors, including social engineering, human intelligence and infiltration to gain access to a physical location to enable network attacks. The purpose of these attacks is to place custom malicious code on one or multiple computers for specific tasks.
Source: Wikipedia
A dropper is a kind of Trojan that has been designed to "install" some sort of malware (virus, backdoor, etc.) to a target system. The malware code can be contained within the dropper (single-stage) in such a way as to avoid detection by virus scanners or the dropper may download the malware to the target machine once activated (two stage). Wikipedia
Remote Access Trojans are programs that provide the capability to allow covert surveillance or the ability to gain unauthorized access to a victim PC. Remote Access Trojans often mimic similar behaviors of keylogger applications by allowing the automated collection of keystrokes, usernames, passwords, screenshots, browser history, emails, chat lots, etc. Remote Access Trojans differ from keyloggers in that they provide the capability for an attacker to gain unauthorized remote access to the victim machine via specially configured communication protocols which are set up upon initial infection of the victim computer. This backdoor into the victim machine can allow an attacker unfettered access, including the ability to monitor user behavior, change computer settings, browse and copy files, utilize the bandwidth (Internet connection) for possible criminal activity, access connected systems, and more. Malwarebytes
During a routine threat-hunting exercise, Cyble research labs discovered a dark web post where a malware developer was advertising a powerful Windows RAT. Cyble
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 | ||
| Arechclient | 1 | command and control | http | 6 | command and control | http, tcp, tcp-pkt | 2024-04-25 |
| DiamondFox | 16 | command and control, installation, actions on objectives | http | 16 | command and control, installation, actions on objectives | http | 2024-04-26 |
| Fake Browser | 6 | exploitation | dns, tls, http | 491 | delivery, exploitation | dns, http, tls | 2024-04-26 |
| Keitaro | 1 | exploitation | http | 333 | command and control, delivery, exploitation | dns, http, tls | 2024-04-26 |
| Lumma | 34 | command and control | dns, tls, http | 702 | actions on objectives, command and control, installation | dns, http, tls | 2024-04-25 |
| NetSupport RAT | 3 | command and control | dns, http, tls | 39 | actions on objectives, command and control, exploitation, installation | dns, http, tls | 2024-04-25 |
| RAT Generic | 8 | command and control | tcp | 109 | actions on objectives, command and control, installation | dns, http, tcp, tcp-pkt, tls | 2024-04-23 |
| SocGholish | 6 | command and control | tls, dns, http | 951 | actions on objectives, command and control, delivery, exploitation, reconnaissance | dns, http, tcp, tcp-pkt, tls | 2024-04-26 |
| TA4903 | 6 | delivery | dns, tls, http | 768 | delivery | dns, http, tls | 2024-04-23 |
| TA582 | 3 | command and control | dns, http, tls | 91 | command and control | dns, http, tls | 2024-04-23 |
| Trojan Dropper | 8 | command and control, delivery | http, dns, tls | 428 | actions on objectives, command and control, delivery, installation | dns, http, tcp, tls, udp | 2024-04-24 |
| VenomRat | 2 | command and control | tls | 2 | command and control | tls | 2024-04-26 |
| WaveStealer | 6 | command and control | dns, tls, http | 6 | command and control | dns, tls, http | 2024-04-26 |
| XWorm | 13 | command and control | tcp-pkt | 1043 | command and control, delivery | dns, http, tcp, tcp-pkt, tls | 2024-04-23 |
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Stamus Networks believes in a world where defenders are heroes, and a future where those they protect remain safe. As organizations face threats from well-funded adversaries, we relentlessly pursue solutions that make the defender’s job easier and more impactful. The global leader in Suricata-based network security solutions, Stamus Networks helps enterprise security teams know more, respond sooner and mitigate their risk with insights gathered from cloud and on-premise network activity. Our Stamus Security Platform combines the best of intrusion detection (IDS), network security monitoring (NSM), and network detection and response (NDR) systems into a single solution that exposes serious and imminent threats to critical assets and empowers rapid response.
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