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Security researchers are warning of previously undisclosed flaws in fully patched Microsoft Exchange servers being exploited by malicious actors in real-world attacks to achieve remote code execution on affected systems. The advisory comes from Vietnamese cybersecurity company GTSC, which discovered the shortcomings as part of its security monitoring and incident response efforts in August 2022. The two vulnerabilities, which are formally yet to be assigned CVE identifiers, are being  tracked  by the Zero Day Initiative as  ZDI-CAN-18333  (CVSS score: 8.8) and  ZDI-CAN-18802  (CVSS score: 6.3). GTSC said that successful exploitation of the flaws could be abused to gain a foothold in the victim's systems, enabling adversaries to drop web shells and carry out lateral movements across the compromised network. "We detected web shells, mostly obfuscated, being dropped to Exchange servers," the company  noted . "Using the user-agent, we detected that t...

A Brazilian threat actor known as  Prilex  has resurfaced after a year-long operational hiatus with an advanced and complex malware to steal money by means of fraudulent transactions. "The Prilex group has shown a high level of knowledge about credit and debit card transactions, and how software used for payment processing works," Kaspersky researchers  said . "This enables the attackers to keep updating their tools in order to find a way to circumvent the authorization policies, allowing them to perform their attacks." The cybercrime group emerged on the scene with ATM-focused malware attacks in the South American nation, providing it the ability to break into ATM machines to perform jackpotting – a type of attack aiming to dispense cash illegitimately – and clone thousands of credit cards to steal funds from the targeted bank's customers. Prilex's modus operandi over the years has since evolved to take advantage of processes relating to point-of-sale ...

A new covert attack campaign singled out multiple military and weapons contractor companies with spear-phishing emails to trigger a multi-stage infection process designed to deploy an unknown payload on compromised machines. The highly-targeted intrusions, dubbed  STEEP#MAVERICK  by Securonix, also targeted a strategic supplier to the F-35 Lightning II fighter aircraft. "The attack was carried out starting in late summer 2022 targeting at least two high-profile military contractor companies," Den Iuzvyk, Tim Peck, and Oleg Kolesnikov  said  in an analysis. Infection chains begin with a phishing mail with a ZIP archive attachment containing a shortcut file that claims to be a PDF document about "Company & Benefits," which is then used to retrieve a stager -- an initial binary that's used to download the desired malware -- from a remote server. This PowerShell stager sets the stage for a "robust chain of stagers" that progresses through seven m...

Every year, billions of credentials appear online, be it on the dark web, clear web, paste sites, or in data dumps shared by cybercriminals. These credentials are often used for account takeover attacks, exposing organizations to breaches, ransomware, and data theft.  While CISOs are aware of growing identity threats and have multiple tools in their arsenal to help reduce the potential risk, the reality is that existing methodologies have proven largely ineffective. According to the  2022 Verizon Data Breach Investigations Report , over 60% of breaches involve compromised credentials.  Attackers use techniques such as social engineering, brute force, and purchasing leaked credentials on the dark web to compromise legitimate identities and gain unauthorized access to victim organizations' systems and resources.  Adversaries often leverage the fact that some passwords are shared among different users, making it easier to breach multiple accounts in the same organiz...

A threat actor by the name of LeakBase has shared a database containing personal information allegedly affecting 16 million users of Swachh City, an Indian complaint redressal platform. Leaked details include usernames, email addresses, password hashes, mobile numbers, one-time passwords, last logged-in times, and IP addresses, among others, according to a report shared by security firm CloudSEK with The Hacker News. The  website  is currently inaccessible. The Swachhata Platform is part of the Indian government's  Swachh Bharat Mission  (translated as Clean India Mission) nationwide initiative to "achieve universal sanitation coverage." According to  Cyble , the database comprises 101,718 unique email addresses and 15,835,111 unique mobile numbers, putting users at risk of phishing, smishing, social engineering, and identity theft. The cybersecurity firm said that the breach possibly leveraged compromised credentials belonging to administrator and no...

Several hacktivist groups are using Telegram and other tools to aid anti-government protests in Iran to bypass regime censorship restrictions amid  ongoing unrest  in the country following the death of Mahsa Amini in custody. "Key activities are data leaking and selling, including officials' phone numbers and emails, and maps of sensitive locations," Israeli cybersecurity firm Check Point  said  in a new report. The company said it has also witnessed sharing of proxies and open VPN servers to get around censorship and reports on the internet status in the country, with one group helping the anti-government demonstrators access social media sites. Chief among them is a Telegram channel called Official Atlas Intelligence Group (AIG) that's primarily focused on publishing data associated with government officials as well as maps of prominent locations. Calling itself the "CyberArmy," the group is said to have commenced its operations in May and has also ...

A new, multi-functional Go-based malware dubbed  Chaos  has been rapidly growing in volume in recent months to ensnare a wide range of Windows, Linux, small office/home office (SOHO) routers, and enterprise servers into its botnet. "Chaos functionality includes the ability to enumerate the host environment, run remote shell commands, load additional modules, automatically propagate through stealing and brute-forcing SSH private keys, as well as launch DDoS attacks," researchers from Lumen's Black Lotus Labs  said  in a write-up shared with The Hacker News. A majority of the bots are located in Europe, specifically Italy, with other infections reported in China and the U.S., collectively representing "hundreds of unique IP addresses" over a one-month time period from mid-June through mid-July 2022. Written in Chinese and leveraging China-based infrastructure for command-and-control, the botnet joins a long list of malware that are designed to establish persi...