19-July-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: 496
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 NDR this past week:
YamaBot is a malware that communicates with a C2 server using HTTP requests. The following is a list of malware function names contained in samples targeting the Windows OS. YamaBot is what the attacker himself named the malware. Targeted to the Windows OS, it includes Windows-specific features such as the ability to create and verify mutex. Jpcert
YamaBot - btcguild |
DarkComet is a Windows remote administration tool and backdoor. MITRE
DarkComet - malpedia |
YAHOYAH is a Trojan used by Tropic Trooper as a second-stage backdoor. MITRE
Yahoyah - trendmicro | Yahoyah - malpedia |
LinPEAS is a script that search for possible paths to escalate privileges on Linux/Unix*/MacOS hosts. The checks are explained on book.hacktricks.xyz Github
LinPEAS - microsoft |
ToddyCat is responsible for multiple sets of attacks detected since December 2020 against high-profile entities in Europe and Asia. There is still little information about this actor, but its main distinctive signs are two formerly unknown tools that Kaspersky call ‘Samurai backdoor’ and ‘Ninja Trojan’. Malpedia
The following detections were updated this past week with changes to kill chain phase(s) or MITRE ATT&CK tactic(s)/technique(s):
Magic Hound is an Iranian-sponsored threat group that conducts long term, resource-intensive cyber espionage operations, likely on behalf of the Islamic Revolutionary Guard Corps. They have targeted U.S. and Middle Eastern government and military personnel, academics, journalists, and organizations such as the World Health Organization (WHO), via complex social engineering campaigns since at least 2014. MITRE
Ave Maria is high-risk trojan designed to steal various information and to cause "chain infections" (spread other infections). It is typically proliferated using various spam email campaigns. Criminals send thousands of deceptive emails that contain infectious attachments, most of which are Microsoft Office (typically Excel) files. Emails are delivered with messages encouraging users to open the attached document, however, this results in infiltration of Ave Maria Pcrisk
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
ESET has analyzed the operations of Evilnum, the APT group behind the Evilnum malware previously seen in attacks against financial technology companies. While said malware has been seen in the wild since at least 2018 and documented previously, little has been published about the group behind it and how it operates. The group’s targets remain fintech companies, but its toolset and infrastructure have evolved and now consist of a mix of custom, homemade malware combined with tools purchased from Golden Chickens, a Malware-as-a-Service (MaaS) provider whose infamous customers include FIN6 and Cobalt Group. Malpedia
Hacking tools are applications that crack or break computer and network security measures. Hacking tools have different capabilities that have been designed to penetrate systems. Some system administrators have been known to use similar programs to test security and identify possible avenues for intrusion. Trendmicro
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.
Silent Librarian is a group that has targeted research and proprietary data at universities, government agencies, and private sector companies worldwide since at least 2013. Members of Silent Librarian are known to have been affiliated with the Iran-based Mabna Institute which has conducted cyber intrusions at the behest of the government of Iran, specifically the Islamic Revolutionary Guard Corps (IRGC).[ MITRE
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
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
Malicious programs of this family secretly send information to the criminal from the user’s infected Android mobile device. Kaspersky
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
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
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 | 3 | command and control | dns | 165 | command and control, delivery | dns, ftp, http, tcp, tls | 2022-07-14 |
| AveMaria RAT | 2 | command and control | tcp-pkt | 18 | actions on objectives, command and control | dns, http, tcp, tcp-pkt | 2022-07-16 |
| Cobalt Strike | 4 | command and control, delivery | http, dns, tcp | 370 | actions on objectives, command and control, delivery, exploitation | dns, http, smb, tcp, tls, udp | 2022-07-13 |
| DarkComet | 36 | installation, command and control | tcp, http, dns | 42 | installation, command and control | tcp, http, dns | 2022-07-12 |
| Evilnum | 2 | command and control | dns | 54 | actions on objectives, command and control, delivery | dns, http, tls | 2022-07-13 |
| HackTool | 2 | command and control | http, smtp | 13 | actions on objectives, command and control, delivery | http, smtp, tcp | 2022-07-14 |
| LinPEAS | 2 | exploitation | tcp-pkt | 2 | exploitation | tcp-pkt | 2022-07-12 |
| Remcos | 1 | command and control | tcp | 833 | command and control, delivery | dns, http, tcp, tcp-pkt | 2022-07-15 |
| Silent Librarian | 3 | command and control | tls | 21 | command and control | dns, tls | 2022-07-14 |
| ToddyCat | 2 | command and control | dns, http | 2 | command and control | dns, http | 2022-07-12 |
| Trojan Agent | 2 | command and control | tcp, http | 342 | actions on objectives, command and control, delivery, installation | dns, http, ip, smtp, tcp, tcp-pkt, tcp-stream, udp | 2022-07-14 |
| Trojan Downloader | 3 | command and control | http | 198 | actions on objectives, command and control, delivery, installation | dns, http, tcp, tls, udp | 2022-07-12 |
| Trojan Dropper | 1 | command and control | http | 237 | actions on objectives, command and control, delivery, installation | dns, http, tcp, tls, udp | 2022-07-15 |
| TrojanSpy-Android | 1 | command and control | http | 357 | actions on objectives, command and control, delivery | dns, http, tcp, tls | 2022-07-15 |
| Wacapew | 2 | command and control | http | 6 | command and control | http, tls | 2022-07-16 |
| X-Files | 1 | actions on objectives | http | 3 | actions on objectives, command and control | http | 2022-07-13 |
| Yahoyah | 2 | command and control | http | 2 | command and control | http | 2022-07-12 |
| YamaBot | 2 | command and control | http | 2 | command and control | http | 2022-07-12 |
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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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