02-January-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: 935
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:
SysJoker, initially discovered by Intezer in 2021, is a multi-platform backdoor with multiple variants for Windows, Linux and Mac. The same malware was also analyzed in another report a few months after the original publication. Since then, SysJoker Windows variants have evolved enough to stay under the radar. Checkpoint
SysJoker - Malpedia - ELF | SysJoker - Malpedia - OSX | SysJoker - Malpedia - Win |
In a troubling development, a threat actor known as “Vacillent” has introduced a newly developed malware named ‘Axile Stealer 1.0’ on Cracked forums, a notorious hub for cybercriminal activities. Available for purchase, the Axile Stealer comes equipped with a range of malicious functionalities, including system information retrieval, password harvesting, extraction of cryptocurrency wallet details, and the concerning capability of providing remote access to compromised systems. Cybersoochna
In computing, a Trojan horse (or simply trojan) is any malware which misleads users of its true intent. The term is derived from the Ancient Greek story of the deceptive Trojan Horse that led to the fall of the city of Troy.
Trojans are generally spread by some form of social engineering, for example where a user is duped into executing an email attachment disguised to appear not suspicious, (e.g., a routine form to be filled in), or by clicking on some fake advertisement on social media or anywhere else. Although their payload can be anything, many modern forms act as a backdoor, contacting a controller which can then have unauthorized access to the affected computer. Trojans may allow an attacker to access users' personal information such as banking information, passwords, or personal identity. It can also delete a user's files or infect other devices connected to the network. Ransomware attacks are often carried out using a trojan.
Spyder - Malpedia | Spyder - Microsoft |
BlackLegion is ransomware that restricts access to files by encrypting them. Victims cannot open encrypted files without decrypting them. Additionally, BlackLegion creates a ransom note ("DecryptNote.txt") and renames files by appending a string of random characters, an email address, and the ".BlackLegion" extension. PCRisk
The following detections were updated this past week with changes to kill chain phase(s) or MITRE ATT&CK tactic(s)/technique(s):
APT33 is a suspected Iranian threat group that has carried out operations since at least 2013. The group has targeted organizations across multiple industries in the United States, Saudi Arabia, and South Korea, with a particular interest in the aviation and energy sectors. MITRE
A remote access tool (RAT) is a piece of software that allows a remote user to control a system as if they had physical access to that system. An adversary may utilize existing RATs, modify existing RATs, or create their own RAT. MITRE
Adversaries may communicate using a custom command and control protocol instead of encapsulating commands/data in an existing Standard Application Layer Protocol. Implementations include mimicking well-known protocols or developing custom protocols (including raw sockets) on top of fundamental protocols provided by TCP/IP/another standard network stack.
This Delphi loader misuses Cloud storage services, such as Google Drive to download the Delphi stager component. The Delphi stager has the actual payload embedded as a resource and starts it. Malpedia
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".
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
Snake is the name of a malicious program, which is classified as a keylogger. As the classification implies, the primary functionality of this malware is keylogging. Hence, Snake infections pose a threat to the privacy/safety of all and any typed information. Pcrisk
It leverages compromised websites and performs some of the most creative fingerprinting checks we’ve seen, before delivering its payload (NetSupport RAT). Malwarebytes
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
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
Turla is a Russian-based threat group that has infected victims in over 45 countries, spanning a range of industries including government, embassies, military, education, research and pharmaceutical companies since 2004. Heightened activity was seen in mid-2015. Turla is known for conducting watering hole and spearphishing campaigns and leveraging in-house tools and malware. Turla’s espionage platform is mainly used against Windows machines, but has also been seen used against macOS and Linux machines. MITRE
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 | ||
| APT33 | 3 | command and control | dns, tls, http | 119 | command and control, delivery | dns, http, tcp, tls | 2023-12-28 |
| AsyncRAT | 1 | delivery | http | 434 | command and control, delivery | dns, http, tcp, tcp-pkt, tls | 2023-12-30 |
| Axile Stealer | 4 | command and control | dns, tls, http | 4 | command and control | dns, tls, http | 2023-12-28 |
| Blacklegion | 2 | command and control | http | 2 | command and control | http | 2023-12-28 |
| Command and Control | 3 | command and control | dns, tls, http | 325 | actions on objectives, command and control, delivery, installation | dns, http, tcp, tls | 2023-12-29 |
| DBatLoader | 1 | installation | tcp-pkt | 10 | command and control, delivery, installation | dns, http, tcp-pkt, tls | 2023-12-28 |
| Fake Browser | 18 | exploitation | dns, tls, http | 210 | delivery, exploitation | dns, http, tls | 2023-12-30 |
| Lumma | 10 | command and control | http, tls, dns | 55 | actions on objectives, command and control, installation | dns, http, tls | 2023-12-27 |
| SnakeKeylogger | 1 | actions on objectives | http | 14 | actions on objectives, command and control, delivery | dns, ftp, ftp-data, http, smtp, tls | 2023-12-30 |
| SocGholish | 3 | command and control | dns, tls, http | 872 | actions on objectives, command and control, delivery, exploitation, reconnaissance | dns, http, tcp, tcp-pkt, tls | 2023-12-27 |
| Spyder | 3 | command and control | http | 3 | command and control | http | 2023-12-28 |
| Stealer and Exfiltration | 1 | command and control | http | 394 | actions on objectives, command and control, delivery, exploitation, installation | dns, ftp, http, smtp, tcp, tcp-pkt, tls | 2023-12-29 |
| SysJoker | 28 | command and control, actions on objectives, installation | dns, http, tls | 31 | command and control, actions on objectives, installation | dns, http, tls | 2023-12-28 |
| TA4903 | 53 | delivery | dns, tls, http | 575 | delivery | dns, http, tls | 2023-12-30 |
| Turla | 1 | command and control | http | 52 | command and control, delivery | dns, http, tcp, tls | 2023-12-28 |
| XWorm | 26 | command and control | tcp-pkt | 1001 | command and control, delivery | dns, http, tcp, tcp-pkt, tls | 2023-12-29 |
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ABOUT STAMUS NETWORKS
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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