30-May-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: 758
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:
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
DeltaStealer - Github |
Loaders, for the most part, have one job: grab malicious executables or payloads from an attacker-controlled server. But that doesn’t mean there isn’t more happening under the hood of some, such as a user-friendly UI, self-healing capabilities, or the equivalent of a retail shop where a botmaster can sell his bots to potential clients.
Loaders are essentially basic remote access Trojans that give an attacker the ability to remotely interact with and control a compromised computer, or bot. While traditionally lightweight (smaller than 50 KB in size) in order to bypass detection by antivirus and other security monitoring technology, loaders evolve, and their viability to cybercriminals remains. Flashpoint
The method of distributing malicious codes by disguising adult games is a method often used in Korea. The attacker used malicious codes that appeared to have been produced by himself instead of known malicious codes, and the names of Stellar and ReceiverNeo were confirmed through the PDB information. The following paths are the paths where the malicious code was detected, and it is presumed that they were included in various adult games and distributed in addition to the types covered here. asec
Check Point Research has closely monitored a series of targeted attacks aimed at European foreign affairs entities. These campaigns have been linked to a Chinese state-sponsored APT group we track as Camaro Dragon, which shares similarities with previously reported activities conducted by state-sponsored Chinese threat actors, namely Mustang Panda. Checkpoint
DarkVision is the name of a Remote Administration Trojan (RAT). Malware of this type is designed to provide unauthorized access to a victim's computer. The RAT allows attackers to control the infected computer remotely, giving them access to sensitive data and the ability to perform a range of malicious actions. Pcrisk
DarkVision - Malware Bazaar |
DarkVision is the name of a Remote Administration Trojan (RAT). Malware of this type is designed to provide unauthorized access to a victim's computer. The RAT allows attackers to control the infected computer remotely, giving them access to sensitive data and the ability to perform a range of malicious actions. Pcrisk
Both frameworks, CloudWizard (version 4) and CommonMagic use the RC5Simple library for encryption. Files encrypted with RC5Simple start with a 7-byte header, which is set to ‘RC5SIMP’ in the library source code. However, this value has been changed in the malicious implants: DUREX43 in CloudWizard and Hwo7X8p in CommonMagic. Additionally, CloudWizard and CommonMagic use the RapidJSON library for parsing JSON objects.
Names of files uploaded to the C2 server in CommonMagic have the format mm.dd _hh.mm.ss.ms.dat (in CloudWizard, the name format is dd.mm.yyyy_hh.mm.ss.ms.dat).
Victim IDs extracted from CloudWizard and CommonMagic samples are similar: they contain a date followed by the two same letters, e.g. 03072020DD, 05082020BB in CloudWizard and WorkObj20220729FF in CommonMagic.
Victims of CommonMagic and CloudWizard are located in the area of conflict in Eastern Europe. Securelist
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
UAC-0063 - Gbhackers | UAC-0063 - CERT-UA |
GoodMorning is a piece of malicious software, which is categorized as ransomware. It operates by encrypting data to demand payment for the decryption. In other words, the affected files are rendered inaccessible and unusable, and victims are asked to pay - to restore their data. During the encryption process, files are renamed according to this pattern: original filename, "Id" followed by the ID assigned to the victim in brackets, the words "Send Email", cyber criminals' email address in brackets, and the ".GoodMorning" 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):
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
Emotet is a modular malware variant which is primarily used as a downloader for other malware variants such as TrickBot and IcedID. Emotet first emerged in June 2014 and has been primarily used to target the banking sector. MITRE
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
The IcedID banking Trojan was discovered by IBM X-Force researchers in 2017. At that time, it targeted banks, payment card providers, mobile services providers, payroll, webmail and e-commerce sites, mainly in the U.S. IcedID has since continued to evolve, and while one of its more recent versions became active in late-2019, X-Force researchers have identified a new major version release that emerged in 2020 with some substantial changes. securityintelligence.com
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
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
Check Point Research identified an ongoing surveillance operation targeting a Southeast Asian government. The attackers use spear-phishing to gain initial access and leverage old Microsoft Office vulnerabilities together with the chain of in-memory loaders to attempt and install a previously unknown backdoor on victim’s machines. Checkpoint
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
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 | ||
| BotLoader | 2 | delivery, command and control | http | 2 | delivery, command and control | http | 2023-05-24 |
| Camaro Dragon | 1 | command and control | http | 1 | command and control | http | 2023-05-24 |
| CloudWizard | 1 | command and control | dns | 1 | command and control | dns | 2023-05-25 |
| Cobalt Strike | 3 | command and control | dns, http | 408 | actions on objectives, command and control, delivery, exploitation | dns, http, smb, tcp, tls, udp | 2023-05-25 |
| DarkVision | 3 | command and control | tcp-pkt | 3 | command and control | tcp-pkt | 2023-05-24 |
| DeltaStealer | 8 | command and control, actions on objectives | dns, tls, http | 8 | command and control, actions on objectives | dns, tls, http | 2023-05-24 |
| Emotet | 1 | command and control | http | 66 | actions on objectives, command and control, delivery, exploitation | dns, http, smb, tls | 2023-05-23 |
| Gamaredon | 9 | delivery, command and control | http, dns | 308 | actions on objectives, command and control, delivery | dns, http, tcp-pkt, tls | 2023-05-27 |
| GoodMorning | 1 | command and control | http | 1 | command and control | http | 2023-05-25 |
| Hawkish Eyes | 3 | command and control, actions on objectives | http | 3 | command and control, actions on objectives | http | 2023-05-24 |
| IcedID | 6 | command and control | dns | 461 | actions on objectives, command and control, delivery | dns, http, tcp, tls | 2023-05-25 |
| Kimsuky | 12 | command and control | dns, http | 118 | actions on objectives, command and control, delivery | dns, ftp, ftp-data, http, tls | 2023-05-27 |
| MalDoc | 1 | command and control | http | 490 | actions on objectives, command and control, delivery | dns, http, tcp, tcp-pkt, tls | 2023-05-24 |
| SharpPanda | 2 | command and control, delivery | http | 8 | command and control, delivery | http | 2023-05-25 |
| SocGholish | 21 | command and control | dns | 306 | actions on objectives, command and control, delivery, exploitation, reconnaissance | dns, http, tcp, tcp-pkt, tls | 2023-05-27 |
| Stellar Stealer | 5 | actions on objectives | http | 5 | actions on objectives | http | 2023-05-24 |
| TA444 | 34 | command and control | dns | 305 | command and control | dns, http, tls | 2023-05-26 |
| UAC-0063 | 3 | command and control | dns | 3 | command and control | dns | 2023-05-25 |
| XWorm | 26 | command and control | tcp-pkt | 662 | command and control | dns, http, tcp, tcp-pkt | 2023-05-25 |
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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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