In cloud environments, cryptojacking – a type of cyberattack that uses computing power to mine cryptocurrency – takes the form of cloud compute resource abuse, which involves a threat actor compromising legitimate tenants. Cloud compute resource abuse could result in financial loss to targeted organizations due to the compute fees that can be incurred from the abuse.…
Tag: BROWSER
The Amadey Trojan Stealer, an active and prominent malware, first emerged on the cybersecurity landscape in 2018 and has maintained a persistent botnet infrastructure ever since. Several campaigns have used this malware, like the previous Splunk Threat Research blog related to RedLine loader, the multi-stage attack distribution article from McAfee in May 2023 and the campaign where it uses N-day vulnerabilities to deliver Amadey malware noted in March 2023 by DarkTrace.…
Cookie Stealer Leveraging Telegram for Data Exfiltration
Read More Microsoft’s Visual Studio is a highly popular Integrated Development Environment (IDE) that empowers developers to create diverse applications. However, the software’s widespread usage has attracted the attention of cybercriminals, leading them to craft nefarious schemes aimed at deceiving and victimizing unsuspecting users.…
AhnLab Security Emergency response Center (ASEC) has discovered that Lazarus, a threat group deemed to be nationally funded, is attacking Windows Internet Information Service (IIS) web servers and using them as distribution points for their malware.
The group is known to use the watering hole technique for initial access. [1]…
This post is also available in: 日本語 (Japanese)
Executive SummaryMallox (aka TargetCompany, FARGO and Tohnichi) is a ransomware strain that targets Microsoft (MS) Windows systems. It has been active since June 2021, and is notable for exploiting unsecured MS-SQL servers as a penetration vector to compromise victims’ networks.…
Authored by Yukihiro Okutomi
McAfee’s Mobile team observed a smishing campaign against Japanese Android users posing as a power and water infrastructure company in early June 2023. This campaign ran for a short time from June 7. The SMS message alerts about payment problems to lure victims to a phishing website to infect the target devices with a remote-controlled SpyNote malware.…
Published On : 2023-07-06
EXECUTIVE SUMMARYThe CYFIRMA research team has identified an infostealer builder known as ‘Blank Grabber’ while monitoring threat actor discussions. It was released in 2022, however since then, it has been frequently updated – with 85 contributions to the project in the last one month alone.…
Vade’s Threat Intelligence and Response Center (TIRC) has detected a new Microsoft 365 phishing attack. The TIRC analyzed an email containing a malicious HTML attachment.…
Not so long ago, a few dozen malicious plugins were discovered in the Chrome Web Store (the official browser extension store for Google Chrome). The most popular of these extensions had over nine million downloads, and altogether these plugins had been downloaded around 87 million times.…
Two weeks ago I wrote about the PDF Toolbox extension containing obfuscated malicious code. Despite reporting the issue to Google via two different channels, the extension remains online. It even gained a considerable number of users after I published my article.
A reader tipped me off however that the Zoom Plus extension also makes a request to serasearchtop[.]com.…
We analyze the technical details of a new ransomware family named Big Head. In this entry, we discuss the Big Head ransomware’s similarities and distinct markers that add more technical details to initial reports on the ransomware.
Reports of a new ransomware family and its variant named Big Head emerged in May, with at least two variants of this family being documented.…
This post is also available in: 日本語 (Japanese)
Executive SummaryRussia’s Foreign Intelligence Service hackers, which we call Cloaked Ursa (aka APT29, UAC-0004, Midnight Blizzard/Nobelium, Cozy Bear) are well known for targeting diplomatic missions globally. Their initial access attempts over the past two years have predominantly used phishing lures with a theme of diplomatic operations such as the following:
Notes verbale (semiformal government-to-government diplomatic communications) Embassies’ operating status updates Schedules for diplomats Invitations to embassy eventsThese types of lures are generally sent to individuals who handle this type of embassy correspondence as part of their daily jobs.…
Introduction to Letscall
Read More In recent years, the rise of Vishing, also known as Voice over IP Phishing, has become so popular that it has eroded trust in calls from unknown numbers.…
Summary
Read More Discover the intricate layers of a new sophisticated and persistent malware campaign targeting businesses in the LATAM region delivering the TOITOIN Trojan. Delve into the multi-stage attack methodology, from deceptive phishing emails to custom-built modules, as we dissect its techniques and shed light on its impact.…
AhnLab Security Emergency response Center (ASEC) has recently discovered the Kimsuky threat group using Chrome Remote Desktop. The Kimsuky threat group uses not only their privately developed AppleSeed malware, but also remote control malware such as Meterpreter to gain control over infected systems. [1] Logs of the group using customized VNC or using remote control tools such as RDP Wrapper also continue to be detected.…
Like all social media platforms, Facebook constantly has to deal with fake accounts, scams and malware. We have written about scams targeting consumers that redirect to fake Microsoft alert pages, but there are also threats targeting businesses that use Facebook to promote their products and services.
In the past few weeks, there’s been a resurgence in sponsored posts and accounts that impersonate Meta/Facebook’s own Ads Manager.…
Cisco Talos has identified multiple versions of an undocumented malicious driver named “RedDriver,” a driver-based browser hijacker that uses the Windows Filtering Platform (WFP) to intercept browser traffic. RedDriver has been active since at least 2021.
RedDriver utilizes HookSignTool to forge its signature timestamp to bypass Windows driver-signing policies.…
Read More In this entry, we discuss the findings of our investigation into a piece of a signed rootkit, whose main binary functions as a universal loader that enables attackers to directly load a second-stage unsigned kernel module.
In one of our recent threat hunting investigations, we came across an interesting new threat activity cluster that we initially thought was a false positive detection for a Microsoft signed file.…
Case Study
Read More WhiteSnake Stealer first appeared on hacking forums at the beginning of February 2022.
The stealer collects data from various browsers such as Firefox, Chrome, Chromium, Edge, Brave, Vivaldi, CocCoc, and CentBrowser. Besides browsing data, it also collects data from Thunderbird, OBS-Studio, FileZilla, Snowflake-SSH, Steam, Signal, Telegram, Discord, Pidgin, Authy, WinAuth, Outlook, Foxmail, The Bat!,…
AhnLab Security Emergency response Center (ASEC) has confirmed the distribution of malware in the form of a batch file (*.bat). This malware is designed to download various scripts based on the anti-malware process, including AhnLab products, installed in the user’s environment. Based on the function names used by the malware and the downloaded URL parameters, it is suspected to have been distributed by the Kimsuky group.…