The ASEC analysis team recently discovered that a Linux malware developed with Shc has been installing a CoinMiner. It is presumed that after successful authentication through a dictionary attack on inadequately managed Linux SSH servers, various malware were installed on the target system. Among those installed were the Shc downloader, XMRig CoinMiner installed through the former, and DDoS IRC Bot, developed with Perl.
On May 10, 2022, Zimbra released versions 9.0.0 patch 24 and 8.8.15 patch 31 to address multiple vulnerabilities in Zimbra Collaboration Suite, including CVE-2…
BRATA is evolving into an Advanced Persistent Threat
Here we go with another episode about our (not so) old friend, BRATA. In almost one year, threat actors (TAs) have further improved the capabilities of this malware. In our previous blog post [1] we defined three main BRATA variants, which appeared during two different waves detected by our telemetries at the very end of 2021. However, during the last months we have observed a change in the attack pattern commonly used.
ASyncRat surpasses Dridex, TrickBot and Emotet to become dominant email threat
Earlier this year Malwarebytes released its 2022 Threat Review, a review of the most important threats and cybersecurity trends of 2021, and what they could mean for 2022. Among other things it covers the year’s alarming rebound in malware detections, and a significant shift in the balance of email threats.
Online security is extremely important for people in Ukraine and the surrounding region right now. Government agencies, independent newspapers and public service providers need it to function and individuals need to communicate safely. Google’s Threat Analysis Group (TAG) has been working around the clock, focusing on the safety and security of our users and the platforms that help them access and share important information.
Cadet Blizzard emerges as a novel and distinct Russian threat actor | Microsoft Security Blog
Microsoft attributes several campaigns to a distinct Russian state-sponsored threat actor tracked as Cadet Blizzard (DEV-0586), including the WhisperGate destructive attack, Ukrainian website defacements, and the hack-and-leak front “Free Civilian”.
The Phantom Menace: Brute Ratel remains rare and targeted
The commercial attack tool’s use by bad actors has faded after an initial flurry, while Cobalt Strike remains the go-to post-exploitation tool for many.
Analysis of CVE-2023-27997 and Clarifications on Volt Typhoon Campaign
Affected Platforms: FortiOS Impacted Users: Targeted at government, manufacturing, and critical infrastructure Impact: Data loss and OS and file corruption Severity Level: Critical Today, Fortinet published a CVSS Critical PSIRT Advisory (FG-IR-23-097 / CVE-2023-27997) along with several other SSL-VPN related fixes. This blog adds context to that advisory, providing our customers with additional details to help them make informed, risk-based decisions, and provides our perspective relative to recent events involving malicious actor activity.
Xortigate, or CVE-2023-27997 - The Rumoured RCE That Was
When Lexfo Security teased a critical pre-authentication RCE bug in FortiGate devices on Saturday 10th, many people speculated on the practical impact of the bug. Would this be a true, sky-is-falling level vulnerability like the recent CVE-2022-42475? Or was it some edge-case hole, requiring some unusual and exotic requisite before any exposure? Others even went further, questioning the legitimacy of the bug itself. Details were scarce and guesswork was rife.
Trustwave Action Response: Zero Day Exploitation of MOVEit (CVE-2023-34362)
On May 31, threat actors were discovered targeting a critical zero day in MOVEit Transfer software resulting in escalated privileges and unauthorized data access. The vulnerability being exploited is an SQL injection and has since been patched. Resources links, including one for the patch, are at the bottom of this post.
GobRAT malware written in Go language targeting Linux routers
JPCERT/CC has confirmed attacks that infected routers in Japan with malware around February 2023. This blog article explains the details of the attack confirmed by JPCERT/CC and GobRAT malware, which was used in the attack. ### Attack flow up to...
Zero Day Initiative — CVE-2023-24941: Microsoft Network File System Remote Code Execution
In this excerpt of a Trend Micro Vulnerability Research Service vulnerability report, Quinton Crist, Guy Lederfein, and Lucas Miller of the Trend Micro Research Team detail a recently patched remote code execution vulnerability in the Microsoft Network File Service (NFS). This bug was originally dis
Mercenary mayhem: A technical analysis of Intellexa's PREDATOR spyware
We would like to thank The Citizen Lab for their cooperation, support and inputs into this research. * Commercial spyware use is on the rise, with actors leveraging these sophisticated tools to conduct surveillance operations against a growing number of targets. Cisco Talos has new details of a commercial spyware product sold by the spyware firm Intellexa (formerly known as Cytrox). * Our research specifically looks at two components of this mobile spyware suite known as “ALIEN” and “PREDATOR,” which compose the backbone of the spyware implant. Our findings include an in-depth walkthrough of the infection chain, including the implants’ various information-stealing capabilities. * A deep dive into both spyware components indicates that ALIEN is more than just a loader for PREDATOR and actively sets up the low-level capabilities needed for PREDATOR to spy on its victims. * We assess with high confidence that the spyware has two additional components — tcore (main component) and kmem (privilege escalation mechanic) — but we were unable to obtain and analyze these modules. * If readers suspect their system(s) may have been compromised by commercial spyware, please consider notifying Talos’ research team at talos-mercenary-spyware-help@external.cisco.com to assist in furthering the community’s knowledge of these threats.
A new recently observed ransomware family dubbed Akira uses a retro aesthetic on their victim site very reminiscent of the 1980s green screen consoles and possibly takes its namesake from the popular 1988 anime film of the same name.
yesterday evening an anonymous 4chan user dumped a leak on the /g/ technology board, claiming to have completely owned risk visualization company optimeyes:
New phishing-as-a-service tool “Greatness” already seen in the wild
A previously unreported phishing-as-a-service (PaaS) offering named “Greatness” has been used in several phishing campaigns since at least mid-2022. Greatness incorporates features seen in some of the most advanced PaaS offerings, such as multi-factor authentication (MFA) bypass, IP filtering and integration with Telegram bots. * Greatness, for now, is only focused on Microsoft 365 phishing pages, providing its affiliates with an attachment and link builder that creates highly convincing decoy and login pages. It contains features such as having the victim’s email address pre-filled and displaying their appropriate company logo and background image, extracted from the target organization’s real Microsoft 365 login page. This makes Greatness particularly well-suited for phishing business users. * An analysis of the domains targeted in several ongoing and past campaigns revealed the victims were almost exclusively companies in the U.S., U.K., Australia, South Africa, and Canada, and the most commonly targeted sectors were manufacturing, health care and technology. The exact distribution of victims in each country and sector varies slightly between campaigns. * To use Greatness, affiliates must deploy and configure a provided phishing kit with an API key that allows even unskilled threat actors to easily take advantage of the service’s more advanced features. The phishing kit and API work as a proxy to the Microsoft 365 authentication system, performing a “man-in-the-middle” attack and stealing the victim’s authentication credentials or cookies.
The malware threat landscape: NodeStealer, DuckTail, and more
We’re sharing our latest research and analysis into malware campaigns that are targeting online businesses — including newer malware posing as AI tools.
Magecart threat actor rolls out convincing modal forms
To ensnare new victims, criminals will often devise schemes that attempt to look as realistic as possible. Having said that, it is not every day that we see the fraudulent copy exceed the original piece. While following up on an ongoing Magecart credit card skimmer campaign, we were almost fooled by a payment form that looked so well done we thought it was real. The threat actor used original logos from the compromised store and customized a web element known as a modal to perfectly hijack the checkout page.
Analysis of Pre-Auth RCE in Sophos Web Appliance (CVE-2023-1671)
CVE-2023-1671 is a pre-authenticated command injection in Sophos Web Appliance. In this blog post, VulnCheck researchers analyze the vulnerability and develop a proof of concept (PoC) for it.
LockBit for Mac | How Real is the Risk of macOS Ransomware?
Discovery of a macOS variant of LockBit has caused alarm, but how serious a threat is it? We explore the malware and the threat of ransomware on Apple Macs.
QBot banker delivered through business correspondence
In early April, we detected a significant increase in attacks that use banking Trojans of the QBot family. The malware would be delivered through e-mails that were based on real business letters the attackers had gotten access to.
The relevance of this macOS specimen is well articulated in their tweet: “Lockbit ransomware group has created their first MacOS-based payload. We believe this is the first time a large ransomware threat group has developed a payload for Apple products.” vx-underground Ok, so even though it’s the weekend, we have what appears to be a new macOS malware specimen from one of the more notorious ransomware gangs! Coupled with the fact that this may be, (as noted by @VXUnderground), “the first time a large ransomware threat group has developed a payload for Apple products” …I was intrigued to decided to dig right in!
in February 2023, Kaspersky technologies detected a number of attempts to execute similar elevation-of-privilege exploits on Microsoft Windows servers belonging to small and medium-sized businesses in the Middle East, in North America, and previously in Asia regions. These exploits were very similar to already known Common Log File System (CLFS) driver exploits that we analyzed previously, but we decided to double check and it was worth it – one of the exploits turned out to be a zero-day, supporting different versions and builds of Windows, including Windows 11. The exploit was highly obfuscated with more than 80% of the its code being “junk” elegantly compiled into the binary, but we quickly fully reverse-engineered it and reported our findings to Microsoft. Microsoft assigned CVE-2023-28252 to the Common Log File System elevation-of-privilege vulnerability, and a patch was released on April 11, 2023, as part of April Patch Tuesday.
