What's new arround internet
| Src | Date (GMT) | Titre | Description | Tags | Stories | Notes |
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2023-05-30 22:00:00 | Rat Seroxen à vendre SeroXen RAT for sale (lien direct) |
This blog was jointly written with Alejandro Prada and Ofer Caspi.
Executive summary
SeroXen is a new Remote Access Trojan (RAT) that showed up in late 2022 and is becoming more popular in 2023. Advertised as a legitimate tool that gives access to your computers undetected, it is being sold for only $30 for a monthly license or $60 for a lifetime bundle, making it accessible.
Key takeaways:
SeroXen is a fileless RAT, performing well at evading detections on static and dynamic analysis.
The malware combines several open-source projects to improve its capabilities. It is a combination of Quasar RAT, r77-rootkit and the command line NirCmd.
Hundreds of samples have shown up since its creation, being most popular in the gaming community. It is only a matter of time before it is used to target companies instead of individual users.
Analysis
Quasar RAT is a legitimate open-source remote administration tool. It is offered on github page to provide user support or employee monitoring. It has been historically associated with malicious activity performed by threat actors, APT groups (like in this Mandiant report from 2017), or government attacks (in this report by Unit42 in 2017).
It was first released in July 2014 as “xRAT” and renamed to “Quasar” in August 2015. Since then, there have been released updates to the code until v1.4.1 in March 2023, which is the most current version. As an open-source RAT tool with updates 9 years after its creation, it is no surprise that it continues to be a common tool used by itself or combined with other payloads by threat actors up to this day.
In a review of the most recent samples, a new Quasar variant was observed by Alien Labs in the wild: SeroXen. This new RAT is a modified branch of the open-source version, adding some modifications features to the original RAT. They’re selling it for monthly or lifetime fee. Figure 1 contains some of the features advertised on their website.
Figure 1. SeroXen features announced on its website.
This new RAT first showed up on a Twitter account, established in September 2022. The person advertising the RAT appeared to be an English-speaking teenager. The same Twitter handle published a review of the RAT on YouTube. The video approached the review from an attacking/Red Team point of view, encouraging people to buy the tool because it is worth the money. They were claiming to be a reseller of the tool.
In December 2022, a specific domain was registered to market/sell the tool, seroxen[.]com. The RAT was distributed via a monthly license for $30 USD or a lifetime license of $60 USD. It was around that time that the malware was first observed in the wild, appearing with 0 detections on VirusTotal.
After a few months, on the 1st of February, the YouTuber CyberSec Zaado published a video alerting the community about the capabilities of the RAT from a defensive perspective. In late February, the RAT was advertised on social media platforms such as TikTok, Twitter, YouTube, and several cracking forums, including hackforums. There were some conversations on gaming forums complaining about being infected by malware after downloading some video games. The artifacts described by the users matched with SeroXen RAT.
The threat actor updated the domain name to seroxen[.]net by the end of March. This domain name was registered on March 27th |
Malware Tool Threat | Uber APT 10 | ★★ |
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2022-05-03 16:31:00 | Anomali Cyber Watch: Time-to-Ransom Under Four Hours, Mustang Panda Spies on Russia, Ricochet Chollima Sends Goldbackdoor to Journalists, and More (lien direct) | The various threat intelligence stories in this iteration of the Anomali Cyber Watch discuss the following topics: APT, China, Cyberespionage, LNK files, Malspam, North Korea, Phishing, Ransomware, and Vulnerabilities. The IOCs related to these stories are attached to Anomali Cyber Watch and can be used to check your logs for potential malicious activity.
Figure 1 - IOC Summary Charts. These charts summarize the IOCs attached to this magazine and provide a glimpse of the threats discussed.
Trending Cyber News and Threat Intelligence
A Lookback Under the TA410 Umbrella: Its Cyberespionage TTPs and Activity
(published: April 28, 2022)
ESET researchers found three different teams under China-sponsored umbrella cyberespionage group TA410, which is loosely linked to Stone Panda (APT10, Chinese Ministry of State Security). ESET named these teams FlowingFrog, JollyFrog, and LookingFrog. FlowingFrog uses the Royal Road RTF weaponizer described by Anomali in 2019. Infection has two stages: the Tendyron implant followed by a very complex FlowCloud backdoor. JollyFrog uses generic malware such as PlugX and QuasarRAT. LookingFrog’s infection stages feature the X4 backdoor followed by the LookBack backdoor. Besides using different backdoors and exiting from IP addresses located in three different districts, the three teams use similar tools and similar tactics, techniques, and procedures (TTPs).
Analyst Comment: Organizations should keep their web-facing applications such as Microsoft Exchange or SharePoint secured and updated. Educate your employees on handling suspected spearphishing attempts. Defense-in-depth (layering of security mechanisms, redundancy, fail-safe defense processes) is the best way to ensure safety from APTs, including a focus on both network and host-based security. Prevention and detection capabilities should also be in place.
MITRE ATT&CK: [MITRE ATT&CK] Exploit Public-Facing Application - T1190 | [MITRE ATT&CK] Phishing - T1566 | [MITRE ATT&CK] Native API - T1106 | [MITRE ATT&CK] Shared Modules - T1129 | [MITRE ATT&CK] Exploitation for Client Execution - T1203 | [MITRE ATT&CK] Inter-Process Communication - T1559 | [MITRE ATT&CK] Windows Management Instrumentation - T1047 | [MITRE ATT&CK] Scheduled Task - T1053 | [MITRE ATT&CK] Server Software Component - T1505 | [MITRE ATT&CK] Create or Modify System Process - T1543 | [MITRE ATT&CK] Obfuscated Files or Information - T1027 | [MITRE ATT&CK] Masquerading - T1036 | [MITRE ATT&CK] Masquerading - T1036 | [MITRE ATT&CK] Rootkit - T1014 | [MITRE ATT&CK] Process Injection - T1055 | |
Ransomware Malware Tool Vulnerability Threat Guideline Cloud | APT 37 APT 10 APT 10 | |
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2021-07-06 15:05:00 | Anomali Cyber Watch: Thousands attacked as REvil ransomware hijacks Kaseya VSA, Leaked Babuk Locker Ransomware Builder Used In New Attacks and More (lien direct) | The various threat intelligence stories in this iteration of the Anomali Cyber Watch discuss the following topics: Babuk, IndigoZebra, Ransomware, REvil, Skimmer, Zero-day and Vulnerabilities. The IOCs related to these stories are attached to Anomali Cyber Watch and can be used to check your logs for potential malicious activity.
Figure 1 - IOC Summary Charts. These charts summarize the IOCs attached to this magazine and provide a glimpse of the threats discussed.
Trending Cyber News and Threat Intelligence
Shutdown Kaseya VSA Servers Now Amidst Cascading REvil Attack Against MSPs, Clients
(published: July 4, 2021)
A severe ransomware attack reportedly took place against the popular remote monitoring and management (RMM) software tool Kaseya VSA. On July 2, 2021, Kaseya urged users to shut down their VSA servers to prevent them from being compromised. The company estimated that fewer than 40 of their customers worldwide were affected, but as some of them were managed service providers (MSPs), over 1,000 businesses were infected. The majority of known victims are in the US with some in Europe (Sweden) and New Zealand. The attackers exploited a zero-day vulnerability in Kaseya’s systems that the company was in the process of fixing. It was part of the administrative interface vulnerabilities in tools for system administration previously identified by Wietse Boonstra, a DIVD researcher. The REvil payload was delivered via Kaseya software using a custom dropper that dropped two files. A dropper opens an old but legitimate copy of Windows Defender (MsMpEng.exe) that then side loads and executes the custom malicious loader's export. The attack coincided with the start of the US Independence Day weekend, and has several politically-charged strings, such as “BlackLivesMatter” Windows registry key and “DTrump4ever” as a password.
Analyst Comment: Kaseya VSA clients should safely follow the company’s recommendations as it advised shutting Kaseya VSA servers down, and is making new security updates available. Every organization should have a ransomware disaster recovery plan even if it is serviced by a managed service provider (MSP).
MITRE ATT&CK: [MITRE ATT&CK] Data Encrypted for Impact - T1486 | [MITRE ATT&CK] Supply Chain Compromise - T1195 | [MITRE ATT&CK] DLL Side-Loading - T1073
Tags: REvil, Sodinokibi, Gandcrab, Leafroller, Kaseya VSA, ransomware, Ransomware-as-a- Service, zero-day, CVE-2021-30116, supply-chain, North America, USA, Sweden, New Zealand, MSP, RMM, schools
IndigoZebra APT Continues To Attack Central Asia With Evolving Tools
(published: July 1, 2021)
Researchers from Check Point have identified the Afghan Government as the latest victim in a cyber espionage campaign by the suspected Chinese group ‘IndigoZebra’. This attack began in April when Afghan National Security Council (NSC) officials began to receive lure emails claiming to be from the President’s secretariat. These emails included a decoy file that would install the backdoor ‘BoxCaon’ on the system before reaching out to the Dropbox API to act as a C&C server. The attacker would then be able to fingerprint the machine and begin accessing files. I |
Ransomware Spam Malware Tool Vulnerability Threat Guideline | APT 19 APT 10 | |
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2021-04-06 16:57:00 | Anomali Cyber Watch: APT Groups, Data Breach, Malspam, and More (lien direct) | The various threat intelligence stories in this iteration of the Anomali Cyber Watch discuss the following topics: APT10, Charming Kitten, China, Cycldek, Hancitor, Malspam, North Korea, Phishing, TA453, and Vulnerabilities. The IOCs related to these stories are attached to Anomali Cyber Watch and can be used to check your logs for potential malicious activity.
Figure 1 - IOC Summary Charts. These charts summarize the IOCs attached to this magazine and provide a glimpse of the threats discussed.
Trending Cyber News and Threat Intelligence
The Leap of a Cycldek-Related Threat Actor
(published: April 5, 2021)
A new sophisticated Chinese campaign was observed between June 2020 and January 2021, targeting government, military and other critical industries in Vietnam, and, to lesser extent, in Central Asia and Thailand. This threat actor uses a "DLL side-loading triad" previously mastered by another Chinese group, LuckyMouse: a legitimate executable, a malicious DLL to be sideloaded by it, and an encoded payload, generally dropped from a self-extracting archive. But the code origins of the new malware used on different stages of this campaign point to a different Chinese-speaking group, Cycldek.
Analyst Comment: Malware authors are always innovating new methods of communicating back to the control servers. Always practice Defense in Depth (do not rely on single security mechanisms - security measures should be layered, redundant, and failsafe).
MITRE ATT&CK: [MITRE ATT&CK] DLL Side-Loading - T1073 | [MITRE ATT&CK] File Deletion - T1107
Tags: Chinese-speaking, Cycldek-related
Hancitor’s Use of Cobalt Strike and a Noisy Network Ping Tool
(published: April 1, 2021)
Hancitor is an information stealer and malware downloader used by a threat actor designated as MAN1, Moskalvzapoe or TA511. Initial infection includes target clicking malspam, then clicking on a link in an opened Google Docs page, and finally clicking to enable macros in the downloaded Word document. In recent months, this actor began using a network ping tool to help enumerate the Active Directory (AD) environment of infected hosts. It generates approximately 1.5 GB of Internet Control Message Protocol (ICMP) traffic.
Analyst Comment: Organizations should use email security solutions to block malicious/spam emails. All email attachments should be scanned for malware before they reach the user's inbox. IPS rules need to be configured properly to identify any reconnaissance attempts e.g. port scan to get early indication of potential breach.
MITRE ATT&CK: [MITRE ATT&CK] Remote System Discovery - T1018 | [MITRE ATT&CK] Remote Access Tools - T1219 | [MITRE ATT&CK] Rundll32 - T1085 | [MITRE ATT&CK] Standard Application Layer Protocol - T1071 | [MITRE ATT&CK] System Information Discovery - T1082
Tags: Hancitor, Malspam, Cobalt Strike
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Malware Tool Vulnerability Threat Conference | APT 35 APT 10 |
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