13-December-2022
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: 618
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 this past week:
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.
Command And Control |
Coinminer is an unwanted malicious software which uses the victim's computational power (CPU and RAM mostly) to mine for coins (for example Monero or Zcash). The malware achieves persistence by adding one of the opensource miners on startup without the victim's consensus. Most sophisticated coin miners use timer settings or cap the CPU usage in order to remain stealthy. Malpedia
Generic Coinminer - microsoft | Generic Coinminer - MITRE - Resource Hijacking |
The following detections were updated this past week with changes to kill chain phase(s) or MITRE ATT&CK tactic(s)/technique(s):
Cobalt Strike is a commercial, full-featured, penetration testing tool which bills itself as “adversary simulation software designed to execute targeted attacks and emulate the post-exploitation actions of advanced threat actors”. Cobalt Strike’s interactive post-exploit capabilities cover the full range of ATT&CK tactics, all executed within a single, integrated system.
In addition to its own capabilities, Cobalt Strike leverages the capabilities of other well-known tools such as Metasploit and Mimikatz. MITRE
Confucius is a cyber espionage group that has primarily targeted military personnel, high-profile personalities, business persons, and government organizations in South Asia since at least 2013. Security researchers have noted similarities between Confucius and Patchwork, particularly in their respective custom malware code and targets. [MITRE] (https://attack.mitre.org/groups/G0142/)
Discovered by Cyble Research Labs, Eternity is the name of a malware family. Actively sold on the Web, Eternity's developers use the Telegram IM (Instant Messaging) service to sell their malicious wares, as well as provide support and customization to buyers. Telegram can also be employed by the attackers using Eternity programs as their C&C (Command and Control) server and proliferation tool.
Currently, this malware family consists of a stealer, worm, miner, clipper, ransomware, and DDoS bot. Pcrisk
G-Cleaner is promoted as an app that supposedly speeds up and optimizes Windows computers. It is promoted as a legitimate application (and its appearance may suggest this) and has a website from which it can be downloaded. In fact, its installation setup also contains a malicious program. G-Cleaner is installed together with AZORult, a trojan-type malicious program. Pcrisk
An adversary may rely upon a user opening a malicious file in order to gain execution. Users may be subjected to social engineering to get them to open a file that will lead to code execution. This user action will typically be observed as follow-on behavior from Spearphishing Attachment. Adversaries may use several types of files that require a user to execute them, including .doc, .pdf, .xls, .rtf, .scr, .exe, .lnk, .pif, and .cpl.
Adversaries may employ various forms of Masquerading on the file to increase the likelihood that a user will open it.
While Malicious File frequently occurs shortly after Initial Access it may occur at other phases of an intrusion, such as when an adversary places a file in a shared directory or on a user's desktop hoping that a user will click on it. This activity may also be seen shortly after Internal Spearphishing. MITRE
Raccoon is a stealer and collects "passwords, cookies and autofill from all popular browsers (including FireFox x64), CC data, system information, almost all existing desktop wallets of cryptocurrencies". Malpedia
Remcos is a closed-source tool that is marketed as a remote control and surveillance software by a company called Breaking Security.
Remcos has been observed being used in malware campaigns.
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
Again, the generic nature of this detection means that the Payloads performed by this group of trojans may be highly variable, and therefore difficult to describe specifically. This group of trojans has been observed to perform any, or all, of the following actions:
redirect Web traffic
- manipulate certain Windows or third-party applications including settings or configurations
- drop or install additional malicious programs
- download and run additional malicious programs
Please note that this list is not exhaustive.
Microsoft
A Trojan downloader is a type of Trojan horse that downloads and installs files, often malicious programs. A Trojan horse is a type of software that looks legitimate but can be malicious in nature. Sometimes these programs can be downloaded onto a device without the user’s knowledge or consent. A Trojan’s purpose is to damage, disrupt, steal, or generally inflict some other harm on your computer and devices. Norton
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 | ||
| Cobalt Strike | 3 | command and control | dns, http | 393 | actions on objectives, command and control, delivery, exploitation | dns, http, smb, tcp, tls, udp | 2022-12-10 |
| Command and Control | 294 | command and control, actions on objectives, delivery, installation | tls | 294 | command and control, actions on objectives, delivery, installation | tls | 2022-12-09 |
| Confucius | 2 | command and control | tcp, dns | 8 | command and control | dns, http, tcp | 2022-12-07 |
| Eternity | 2 | command and control, delivery | tcp, http | 10 | actions on objectives, command and control, delivery | dns, http, tcp, tls | 2022-12-09 |
| GCleaner | 2 | delivery | http | 11 | delivery | http | 2022-12-07 |
| Generic Coinminer | 2 | actions on objectives | tcp | 2 | actions on objectives | tcp | 2022-12-09 |
| MalDoc | 3 | delivery | dns | 485 | actions on objectives, command and control, delivery | dns, http, tcp, tcp-pkt, tls | 2022-12-08 |
| Raccoon Stealer | 1 | command and control | http | 134 | actions on objectives, command and control, delivery | http, tls | 2022-12-06 |
| Remcos | 2 | command and control | tcp | 873 | command and control, delivery | dns, http, tcp, tcp-pkt | 2022-12-07 |
| SocGholish | 2 | command and control | dns | 207 | actions on objectives, command and control, delivery, exploitation, reconnaissance | dns, http, tcp, tcp-pkt, tls | 2022-12-06 |
| Stealer and Exfiltration | 3 | actions on objectives | http | 234 | actions on objectives, command and control, exploitation, installation | dns, ftp, http, smtp, tcp, tcp-pkt, tls | 2022-12-10 |
| Trojan Agent | 2 | delivery | http | 373 | actions on objectives, command and control, delivery, installation | dns, http, ip, smtp, tcp, tcp-pkt, tcp-stream, udp | 2022-12-09 |
| Trojan Downloader | 1 | delivery | http | 238 | actions on objectives, command and control, delivery, installation | dns, http, tcp, tls, udp | 2022-12-09 |
| XWorm | 1 | command and control | tcp | 37 | command and control | dns, tcp, tcp-pkt | 2022-12-06 |
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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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