23-August-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: 526
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:
Erbium is a piece of malicious software classified as a stealer. Malware within this category is designed to extract vulnerable data from infected devices. Our researchers discovered Erbium while inspecting malware-selling hotspots. Pcrisk
Lilith is the name of a malicious program categorized as ransomware. Malware within this category is designed to encrypt data and demand payment for the decryption.
When we executed a sample of Lilith on our testing machine, it encrypted files and appended their filenames with a ".lilith" extension. For example, a file originally titled "1.jpg" appeared as "1.jpg.lilith", "2.png" as "2.png.lilith", etc. Afterwards, a ransom-demanding message named "Restore_Your_Files.txt" - was created on the desktop. Pcrisk
Lilith - malpedia | Lilith - MITRE - Phishing | Lilith - MITRE - Data Encrypted for Impact | Lilith - MITRE - System Information Discovery | Lilith - MITRE - File and Directory Discovery | Lilith - MITRE - Malicious File | Lilith - MITRE - User Execution | Lilith - MITRE - Ingress Tool Transfer | Lilith - MITRE - Multi-Stage Channels |
Unit 42 also discovered a custom remote access Trojan/backdoor containing a unique command and control (C2) protocol. Based on the strings within the binary as well as the functionality, we’ve opted to name it ROMCOM RAT. Unit42
ROMCOM - malpedia |
IceApple uses an in-memory-only framework that highlights the adversary’s priority of maintaining a low forensic footprint on the infected host. This is typical of long-running objectives aimed at intelligence collection and aligns with a targeted, state-sponsored mission. CrowdStrike
Adware can get onto people’s mobile or cell phones through apps in popular categories like entertainment and gaming. These apps can appear harmless but, once installed, can behave maliciously.
Again, there is a spectrum from relatively harmless to far more harmful. At the harmless end, you may download an app that simply spams you with ads once it has been installed. This can be a nuisance, especially because sometimes the ads can appear from outside the app, making it hard to identify the cause.
Far more harmful is ad fraud and ad clicker software. This involves apps surreptitiously downloading executable files and running malicious activities in the background. This can include clicking on ads without users knowing or subscribing users to premium services that they then have to pay for. Kaspersky
To help network admins and security professionals detect the malware used in the attack, Cisco created two new ClamAV detections for the backdoor and a Windows exploit used for privilege elevation.
Win.Exploit.Kolobko-9950675-0
Win.Backdoor.Kolobko-9950676-0 While Cisco provided some information on the backdoor and how it was used to remotely execute commands, their writeup does not mention any info on the exploit executable that was discovered.
However, according to detections on VirusTotal, the exploit is for CVE-2022-24521, a Windows Common Log File System Driver Elevation of Privilege vulnerability, reported by the NSA and CrowdStrike to Microsoft and patched in April 2022. Bleepingcomputer
Kolobko - cisco |
The following detections were updated this past week with changes to kill chain phase(s) or MITRE ATT&CK tactic(s)/technique(s):
Malware of this family uses advertising as its main monetization method. The malware uses different methods to display as many ads as possible to the user, including by installing new adware.
These Trojans can get root privileges in order to hide in the system folder, which makes the Trojans very difficult to remove. Kaspersky
Targeting Android users, Anubis is malicious software classified as a banking Trojan. This malware attempts to steal banking information and can lead to victims' experiencing financial loss, privacy issues and other serious problems. Anubis has been observed being proliferated via deceptive/scam websites, which incorporate the Coronavirus/COVID-19 pandemic in some manner. 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
In the world of cybersecurity, a backdoor refers to any method by which authorized and unauthorized users are able to get around normal security measures and gain high level user access (aka root access) on a computer system, network, or software application. Once they're in, cybercriminals can use a backdoor to steal personal and financial data, install additional malware, and hijack devices. [Malwarebytes] (https://www.malwarebytes.com/backdoor/)
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
Delf is a large family of malicious programs, many of which are associated with data theft. F-secure
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
JSSLOADER is the name of a Remote Access Trojan (RAT) that is capable of exfiltrating data, executing commands, downloading other malware, auto-updating itself and preventing itself from being debugged (analyzed). It is known that JSSLOADER is mostly used by the group of cyber criminals called FIN7. Pcrisk
Kimsuky is a North Korean-based threat group that has been active since at least September 2013. The group initially focused on targeting Korean think tanks and DPRK/nuclear-related targets, expanding recently to the United States, Russia, and Europe. The group was attributed as the actor behind the Korea Hydro & Nuclear Power Co. compromise. MITRE
Malware of this family consists of Trojans that use anti-emulation, anti-debugging, and code obfuscation to prevent their analysis. Kaspersky
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
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
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
Vidar (also known as Vidar Stealer) is a trojan (a malicious program) commonly used by cyber criminals. The program steals various personal information from users who have computers infected with the virus. Pcrsik
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 | ||
| Android Trojan Agent | 23 | command and control, actions on objectives | http, tcp | 93 | actions on objectives, command and control | http, tcp | 2022-08-16 |
| Anubis | 1 | command and control | dns | 59 | command and control | dns, http, tcp, tls | 2022-08-20 |
| Banker Stealer | 3 | command and control | dns, http | 185 | actions on objectives, command and control, delivery | dns, http, smtp, tcp, tls | 2022-08-20 |
| Basdoor | 1 | command and control | dns | 8 | command and control | dns, tcp, tls | 2022-08-20 |
| Copper Stealer | 1 | command and control | dns | 16 | actions on objectives, command and control, delivery, installation | dns, http, tls | 2022-08-16 |
| Delf | 1 | command and control | http | 105 | actions on objectives, command and control, delivery, installation | dns, http, smtp, tcp, tcp-pkt, tls | 2022-08-16 |
| Erbium | 1 | command and control | dns | 3 | command and control | dns | 2022-08-16 |
| Gamaredon | 6 | command and control | dns | 102 | actions on objectives, command and control, delivery | dns, http | 2022-08-17 |
| IceApple | 1 | command and control | http | 1 | command and control | http | 2022-08-16 |
| JSSLoader | 3 | command and control | dns, tls, http | 11 | command and control | dns, http, tls | 2022-08-20 |
| Kimsuky | 2 | command and control | dns | 97 | actions on objectives, command and control, delivery | dns, ftp, ftp-data, http, tls | 2022-08-16 |
| Kolobko | 14 | command and control | dns | 14 | command and control | dns | 2022-08-16 |
| Kryptik | 1 | command and control | tcp-pkt | 86 | actions on objectives, command and control, delivery | http, smtp, tcp, tcp-pkt, tls | 2022-08-16 |
| Lilith | 2 | actions on objectives | http | 4 | actions on objectives | http | 2022-08-16 |
| Mobile Adware | 76 | command and control, actions on objectives | http, tcp | 76 | command and control, actions on objectives | http, tcp | 2022-08-16 |
| ROMCOM | 2 | command and control | dns | 2 | command and control | dns | 2022-08-16 |
| Raccoon Stealer | 2 | command and control | http | 130 | actions on objectives, command and control, delivery | http, tls | 2022-08-16 |
| Remcos | 1 | command and control | tcp | 846 | command and control, delivery | dns, http, tcp, tcp-pkt | 2022-08-16 |
| SocGholish | 16 | command and control | dns, tls | 80 | command and control, delivery, reconnaissance | dns, http, tcp, tls | 2022-08-20 |
| TA444 | 7 | command and control | dns | 38 | command and control | dns, http | 2022-08-18 |
| Trojan Agent | 1 | command and control | http | 360 | actions on objectives, command and control, delivery, installation | dns, http, ip, smtp, tcp, tcp-pkt, tcp-stream, udp | 2022-08-16 |
| Trojan Dropper | 5 | delivery | dns | 251 | actions on objectives, command and control, delivery, installation | dns, http, tcp, tls, udp | 2022-08-19 |
| Vidar | 3 | command and control, delivery, actions on objectives | http | 20 | actions on objectives, command and control, delivery | dns, http, tls | 2022-08-16 |
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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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