4-July-2023
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: 784
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:
A Trojan horse or Trojan is a type of malware that is often disguised as legitimate software. Trojans can be employed by cyber-thieves and hackers trying to gain access to users' systems. Users are typically tricked by some form of social engineering into loading and executing Trojans on their systems. Once activated, Trojans can enable cyber-criminals to spy on you, steal your sensitive data, and gain backdoor access to your system. Kaspersky
GreetingGhoul is a piece of malicious software that targets cryptocurrency wallets. This stealer-type malware is focused exclusively on digital currencies. GreetingGhoul is currently active in Europe, South America, and the United States. There is tenuous evidence pointing to the cyber criminals behind this stealer being from a Russian-speaking region. Pcrisk
GreetingGhoul - securelist |
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
Medusa Stealer - AnyRun |
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
Kraken Stealer - github | Kraken Stealer - malpedia |
Cyble Research and Intelligence Labs (CRIL) came across a new stealer named Invicta Stealer. The developer behind this malware is extensively engaged on social media platforms, utilizing them to promote their information stealer and its lethal capabilities.
The Invicta Stealer can collect system information, system hardware details, wallet data, and browser data and extract information from applications like Steam and Discord. Cyble
The following detections were updated this past week with changes to kill chain phase(s) or MITRE ATT&CK tactic(s)/technique(s):
Gamaredon Group is a threat group that has been active since at least 2013 and has targeted individuals likely involved in the Ukrainian government. The name Gamaredon Group comes from a misspelling of the word "Armageddon", which was detected in the adversary's early campaigns. MITRE
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
Redline Stealer is a malware available on underground forums for sale apparently as standalone versions or also on a subscription basis. This malware harvests information from browsers such as saved credentials, autocomplete data, and credit card information. A system inventory is also taken when running on a target machine, to include details such as the username, location data, hardware configuration, and information regarding installed security software. More recent versions of Redliune added the ability to steal cryptocurrency. FTP and IM clients are also apparently targeted by this family, and this malware has the ability to upload and download files, execute commands, and periodically send back information about the infected computer. Malpedia
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
It leverages compromised websites and performs some of the most creative fingerprinting checks we’ve seen, before delivering its payload (NetSupport RAT). Malwarebytes
Spark is a Windows backdoor and has been in use since as early as 2017. MITRE
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
DPRK APT actor tracked by Proofpoint as TA444 Malpedia
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
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 | ||
| Gamaredon | 8 | command and control | dns, http | 378 | actions on objectives, command and control, delivery | dns, http, tcp-pkt, tls | 2023-07-01 |
| GreetingGhoul | 2 | command and control, actions on objectives | dns, http | 2 | command and control, actions on objectives | dns, http | 2023-06-27 |
| Invicta Stealer | 2 | command and control, actions on objectives | http | 2 | command and control, actions on objectives | http | 2023-06-27 |
| Keitaro | 1 | exploitation | dns | 96 | command and control, delivery, exploitation | dns, http, tls | 2023-06-29 |
| Kraken Stealer | 1 | actions on objectives | smtp | 1 | actions on objectives | smtp | 2023-06-27 |
| Medusa Stealer | 1 | actions on objectives | tcp | 1 | actions on objectives | tcp | 2023-06-27 |
| RedLine | 1 | command and control | dns | 57 | actions on objectives, command and control, delivery, installation | dns, http, tcp | 2023-07-01 |
| Sinresby | 1 | command and control | http | 5 | command and control | http, tcp | 2023-07-01 |
| SocGholish | 3 | command and control | dns | 347 | actions on objectives, command and control, delivery, exploitation, reconnaissance | dns, http, tcp, tcp-pkt, tls | 2023-06-30 |
| Spark | 1 | command and control | http | 3 | command and control | dns, http | 2023-06-28 |
| Stealer and Exfiltration | 2 | actions on objectives | http | 334 | actions on objectives, command and control, delivery, exploitation, installation | dns, ftp, http, smtp, tcp, tcp-pkt, tls | 2023-06-29 |
| TA444 | 63 | command and control | dns, tls | 406 | command and control | dns, http, tls | 2023-07-01 |
| Trojan Agent | 2 | actions on objectives, command and control | http | 387 | actions on objectives, command and control, delivery, installation | dns, http, ip, smtp, tcp, tcp-pkt, tcp-stream, tls, udp | 2023-06-30 |
| Zenlod | 1 | delivery | http | 1 | delivery | http | 2023-06-27 |
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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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