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A malware-as-a-service (Maas) dubbed  Matanbuchus  has been observed spreading through phishing campaigns, ultimately dropping the Cobalt Strike post-exploitation framework on compromised machines. Matanbuchus, like other  malware loaders  such as  BazarLoader ,  Bumblebee , and  Colibri , is engineered to download and execute second-stage executables from command-and-control (C&C) servers on infected systems without detection. Available on Russian-speaking cybercrime forums for a price of $2,500 since February 2021, the malware is equipped with capabilities to launch .EXE and .DLL files in memory and run arbitrary PowerShell commands. The findings, released by threat intelligence firm Cyble last week, document the latest infection chain associated with the loader, which is linked to a threat actor who goes by the online moniker BelialDemon. "If we look historically, BelialDemon has been involved in the development of malware loaders," Unit 4...

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A suspected ransomware intrusion attempt against an unnamed target leveraged a Mitel VoIP appliance as an entry point to achieve remote code execution and gain initial access to the environment. The  findings  come from cybersecurity firm CrowdStrike, which traced the source of the attack to a Linux-based Mitel VoIP device sitting on the network perimeter, while also identifying a previously unknown exploit as well as a couple of anti-forensic measures adopted by the actor on the device to erase traces of their actions. The zero-day exploit in question is tracked as CVE-2022-29499 and was fixed by Mitel in April 2022 by means of a remediation script that it shared with customers. It's rated 9.8 out of 10 for severity on the CVSS vulnerability scoring system, making it a critical shortcoming. "A vulnerability has been identified in the Mitel Service Appliance component of MiVoice Connect (Mitel Service Appliances – SA 100, SA 400, and Virtual SA) which could allow a malic...

A week after it emerged that a sophisticated mobile spyware dubbed Hermit was used by the government of Kazakhstan within its borders, Google said it has notified Android users of infected devices. Additionally, necessary changes have been implemented in  Google Play Protect  — Android's built-in malware defense service — to protect all users, Benoit Sevens and Clement Lecigne of Google Threat Analysis Group (TAG)  said  in a Thursday report. Hermit, the work of an Italian vendor named RCS Lab, was  documented  by Lookout last week, calling out its modular feature-set and its abilities to harvest sensitive information such as call logs, contacts, photos, precise location, and SMS messages. Once the threat has thoroughly insinuated itself into a device, it's also equipped to record audio and make and redirect phone calls, besides abusing its permissions to accessibility services on Android to keep tabs on various foreground apps used by the victims. Its...

Researchers have discovered a number of malicious Python packages in the official third-party software repository that are engineered to exfiltrate AWS credentials and environment variables to a publicly exposed endpoint. The list of packages includes loglib-modules, pyg-modules, pygrata, pygrata-utils, and hkg-sol-utils, according to Sonatype security researcher Ax Sharma. The packages and as well as the endpoint have now been taken down. "Some of these packages either contain code that reads and exfiltrates your secrets or use one of the dependencies that will do the job," Sharma  said . The malicious code injected into "loglib-modules" and "pygrata-utils" allow the packages to harvest AWS credentials, network interface information, and environment variables and export them to a remote endpoint: "hxxp://graph.pygrata[.]com:8000/upload." Troublingly, the endpoints hosting this information in the form of hundreds of .TXT files were not secu...

A China-based advanced persistent threat (APT) group is possibly deploying short-lived ransomware families as a decoy to cover up the true operational and tactical objectives behind its campaigns. The activity cluster, attributed to a hacking group dubbed  Bronze Starlight  by Secureworks, involves the deployment of post-intrusion ransomware such as LockFile, Atom Silo, Rook, Night Sky, Pandora, and LockBit 2.0. "The ransomware could distract incident responders from identifying the threat actors' true intent and reduce the likelihood of attributing the malicious activity to a government-sponsored Chinese threat group," the researchers  said  in a new report. "In each case, the ransomware targets a small number of victims over a relatively brief period of time before it ceases operations, apparently permanently." Bronze Starlight, active since mid-2021, is also tracked by Microsoft under the emerging threat cluster moniker DEV-0401, with the tech giant empha...

A new malware tool that enables cybercriminal actors to build malicious Windows shortcut ( .LNK ) files has been spotted for sale on cybercrime forums. Dubbed Quantum Lnk Builder , the software makes it possible to spoof any extension and choose from over 300 icons, not to mention support  UAC  and  Windows SmartScreen  bypass as well as "multiple payloads per .LNK" file. Also offered are capabilities to generate .HTA and disk image (.ISO) payloads. Quantum Builder is available for lease at different price points: €189 a month, €355 for two months, €899 for six months, or as a one-off lifetime purchase for €1,500. ".LNK files are shortcut files that reference other files, folders, or applications to open them," Cyble researchers  said  in a report. "The [threat actor] leverages the .LNK files and drops malicious payloads using  LOLBins  [living-off-the-land binaries]." Early evidence of malware samples using Quantum Builder in the wild is s...