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An unknown threat actor has been linked to a cyber attack on a power generation company in southern Africa with a new variant of the SystemBC malware called DroxiDat as a precursor to a suspected ransomware attack. "The proxy-capable backdoor was deployed alongside Cobalt Strike Beacons in a south African nation's critical infrastructure," Kurt Baumgartner, principal security researcher at Kaspersky's Global Research and Analysis Team (GReAT),  said . The Russian cybersecurity company said the attack, which took place in late March 2023, was in its early stages and involved the use of DroxiDat to profile the system and proxy network traffic using the  SOCKS5 protocol  to and from command-and-control (C2) infrastructure. SystemBC  is a C/C++-based commodity malware and remote administrative tool that was  first seen in 2019 . Its main feature is to set up  SOCKS5 proxies  on victim computers that can then be used by threat actors to tunnel maliciou...

A set of 16 high-severity security flaws have been disclosed in the  CODESYS V3  software development kit (SDK) that could result in remote code execution and denial-of-service under specific conditions, posing risks to operational technology (OT) environments. The flaws, tracked from CVE-2022-47378 through CVE-2022-47393 and dubbed  CoDe16 , carry a CVSS score of 8.8 with the exception of CVE-2022-47391, which has a severity rating of 7.5. Twelve of the flaws are buffer overflow vulnerabilities. "Exploitation of the discovered vulnerabilities, which affect all versions of CODESYS V3 prior to version 3.5.19.0, could put operational technology (OT) infrastructure at risk of attacks, such as remote code execution (RCE) and denial-of-service (DoS)," Vladimir Tokarev of the Microsoft Threat Intelligence Community  said  in a report. While a successful weaponization of the flaws requires user authentication as well as an in-depth knowledge of the proprietary prot...

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has  added  a recently patched security flaw in Microsoft's .NET and Visual Studio products to its Known Exploited Vulnerabilities ( KEV ) catalog, citing evidence of active exploitation. Tracked as  CVE-2023-38180  (CVSS score: 7.5), the high-severity flaw relates to a case denial-of-service (DoS) impacting .NET and Visual Studio. It was  addressed  by Microsoft as part of its August 2023 Patch Tuesday updates shipped earlier this week, tagging it with an "Exploitation More Likely" assessment. While exact details surrounding the nature of exploitation are unclear, the Windows maker has acknowledged the existence of a proof-of-concept (PoC) in its advisory. It also said that attacks leveraging the flaw can be pulled off without any additional privileges or user interaction. "Proof-of-concept exploit code is available, or an attack demonstration is not practical for most systems," the com...

Malicious actors are using a legitimate Rust-based injector called  Freeze[.]rs  to deploy a commodity malware called XWorm in victim environments. The novel attack chain, detected by Fortinet FortiGuard Labs on July 13, 2023, is initiated via a phishing email containing a booby-trapped PDF file. It has also been used to introduce Remcos RAT by means of a crypter called SYK Crypter, which was first documented by Morphisec in May 2022. "This file redirects to an HTML file and utilizes the 'search-ms' protocol to access an LNK file on a remote server," security researcher Cara Lin  said . "Upon clicking the LNK file, a PowerShell script executes Freeze[.]rs and SYK Crypter for further offensive actions." Freeze[.]rs, released on May 4, 2023, is an  open-source red teaming tool  from Optiv that functions as a payload creation tool used for circumventing security solutions and executing shellcode in a stealthy manner. "Freeze[.]rs utilizes multiple te...

A new information malware strain called  Statc Stealer  has been found infecting devices running Microsoft Windows to siphon sensitive personal and payment information. "Statc Stealer exhibits a broad range of stealing capabilities, making it a significant threat," Zscaler ThreatLabz researchers Shivam Sharma and Amandeep Kumar  said  in a technical report published this week. "It can steal sensitive information from various web browsers, including login data, cookies, web data, and preferences. Additionally, it targets cryptocurrency wallets, credentials, passwords, and even data from messaging apps like Telegram." Written in C++, the malicious stealer finds its way into victim systems when potential victims are tricked into clicking on seemingly innocuous ads, with the stealer imitating an MP4 video file format on web browsers like Google Chrome. The first-stage payload, while dropping and executing a decoy PDF installer, also stealthily deploys a downloader...

A widely used Chinese language input app for Windows and Android has been found vulnerable to serious security flaws that could allow a malicious interloper to decipher the text typed by users. The findings from the University of Toronto's Citizen Lab, which carried out an analysis of the encryption mechanism used in Tencent's Sogou Input Method , an app that has over 455 million monthly active users across Windows, Android, and iOS. The vulnerabilities are rooted in EncryptWall, the service's custom encryption system, allowing network eavesdroppers to extract the textual content and access sensitive data. "The Windows and Android versions of Sogou Input Method contain vulnerabilities in this encryption system, including a vulnerability to a CBC  padding oracle attack , which allow network eavesdroppers to recover the plaintext of encrypted network transmissions, revealing sensitive information including what users have typed," the researchers  said . CBC, s...

Attackers continue to target Microsoft identities to gain access to connected Microsoft applications and federated SaaS applications. Additionally, attackers continue to progress their attacks in these environments, not by exploiting vulnerabilities, but by abusing native Microsoft functionality to achieve their objective. The attacker group Nobelium, linked with the SolarWinds attacks, has been documented using native functionality like the creation of Federated Trusts  [1]  to enable persistent access to a Microsoft tenant. This article demonstrates an additional native functionality that when leveraged by an attacker enables persistent access to a Microsoft cloud tenant and lateral movement capabilities to another tenant. This attack vector enables an attacker operating in a compromised tenant to abuse a misconfigured Cross-Tenant Synchronization (CTS) configuration and gain access to other connected tenants or deploy a rogue CTS configuration to maintain persistence with...

Threat actors are increasingly using a phishing-as-a-service (PhaaS) toolkit dubbed EvilProxy to pull off account takeover attacks aimed at high-ranking executives at prominent companies. According to Proofpoint, an ongoing hybrid campaign has leveraged the service to target thousands of Microsoft 365 user accounts, sending approximately 120,000 phishing emails to hundreds of organizations worldwide between March and June 2023. Nearly 39% of the hundreds of compromised users are said to be C-level executives, including CEOs (9%) and CFOs (17%). The attacks have also singled out personnel with access to financial assets or sensitive information. At least 35% of all compromised users had additional account protections enabled. The campaigns are seen as a response to the increased adoption of multi-factor authentication (MFA) in enterprises, prompting threat actors to evolve their tactics to bypass new security layers by incorporating adversary-in-the-middle ( AitM ) phishing kits to ...

Interpol has announced the takedown of a phishing-as-a-service (PhaaS) platform called 16Shop, in addition to the arrests of three individuals in Indonesia and Japan. 16Shop specialized in the sales of phishing kits that other cybercriminals can purchase to mount phishing attacks on a large scale, ultimately facilitating the theft of credentials and payment details from users of popular services such as Apple, PayPal, American Express, Amazon, and Cash App, among others. "Victims typically receive an email with a pdf file or link that redirects to a site requesting the victims' credit card or other personally identifiable information," Interpol  said . "This information is then stolen and used to extract money from the victims." No less than 70,000 users across 43 countries are estimated to have been compromised via services offered on 16Shop. The law enforcement operation has also led to the arrest of the site's administrator, a 21-year-old Indonesian...