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DJVU Ransomware's Latest Variant 'Xaro' Disguised as Cracked Software

DJVU Ransomware's Latest Variant 'Xaro' Disguised as Cracked Software

Nov 29, 2023 Ransomware / Cyber Threat
A variant of a ransomware strain known as DJVU has been observed to be distributed in the form of cracked software. "While this attack pattern is not new, incidents involving a DJVU variant that appends the .xaro extension to affected files and demanding ransom for a decryptor have been observed infecting systems alongside a host of various commodity loaders and infostealers," Cybereason security researcher Ralph Villanueva  said . The new variant has been codenamed Xaro by the American cybersecurity firm. DJVU, in itself, is a  variant of the STOP ransomware , typically arrives on the scene masquerading as legitimate services or applications. It's also delivered as a payload of  SmokeLoader . A significant aspect of DJVU attacks is the deployment of additional malware, such as information stealers (e.g., RedLine Stealer and Vidar), making them more damaging in nature. In the latest attack chain documented by Cybereason, Xaro is propagated as an archive file from a...
PrivateLoader PPI Service Found Distributing Info-Stealing RisePro Malware

PrivateLoader PPI Service Found Distributing Info-Stealing RisePro Malware

Dec 26, 2022 Cyber Crime / Data Security
The pay-per-install (PPI) malware downloader service known as PrivateLoader is being used to distribute a previously documented information-stealing malware dubbed  RisePro . Flashpoint spotted the newly identified stealer on December 13, 2022, after it discovered "several sets of logs" exfiltrated using the malware on an illicit cybercrime marketplace called Russian Market. A C++-based malware, RisePro is said to share similarities with another info-stealing malware referred to as Vidar stealer, itself a fork of a stealer codenamed  Arkei  that emerged in 2018. "The appearance of the stealer as a payload for a pay-per-install service may indicate a threat actor's confidence in the stealer's abilities," the threat intelligence company  noted  in a write-up last week. Cybersecurity firm SEKOIA, which  released  its own analysis of RisePro , further identified partial source code overlaps with PrivateLoader. This encompasses the string scrambling...
Want to Grow Vulnerability Management into Exposure Management? Start Here!

Want to Grow Vulnerability Management into Exposure Management? Start Here!

Dec 05, 2024Attack Surface / Exposure Management
Vulnerability Management (VM) has long been a cornerstone of organizational cybersecurity. Nearly as old as the discipline of cybersecurity itself, it aims to help organizations identify and address potential security issues before they become serious problems. Yet, in recent years, the limitations of this approach have become increasingly evident.  At its core, Vulnerability Management processes remain essential for identifying and addressing weaknesses. But as time marches on and attack avenues evolve, this approach is beginning to show its age. In a recent report, How to Grow Vulnerability Management into Exposure Management (Gartner, How to Grow Vulnerability Management Into Exposure Management, 8 November 2024, Mitchell Schneider Et Al.), we believe Gartner® addresses this point precisely and demonstrates how organizations can – and must – shift from a vulnerability-centric strategy to a broader Exposure Management (EM) framework. We feel it's more than a worthwhile read an...
Researchers Find Link b/w PrivateLoader and Ruzki Pay-Per-Install Services

Researchers Find Link b/w PrivateLoader and Ruzki Pay-Per-Install Services

Sep 16, 2022
Cybersecurity researchers have exposed new connections between a widely used pay-per-install (PPI) malware service known as PrivateLoader and another PPI platform offered by a cybercriminal actor dubbed ruzki. "The threat actor ruzki (aka les0k, zhigalsz) advertises their PPI service on underground Russian-speaking forums and their Telegram channels under the name ruzki or zhigalsz since at least May 2021," SEKOIA said. The cybersecurity firm said its investigations into the twin services led it to conclude that PrivateLoader is the proprietary loader of the ruzki PPI malware service. PrivateLoader, as the name implies, functions as a C++-based loader to download and deploy additional malicious payloads on infected Windows hosts. It's primarily distributed through SEO-optimized websites that claim to provide cracked software. Although it was  first documented  earlier this February by Intel471, it's said to have been put to use starting as early as May 2021. S...
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Hackers Using PrivateLoader PPI Service to Distribute New NetDooka Malware

Hackers Using PrivateLoader PPI Service to Distribute New NetDooka Malware

May 06, 2022
A pay-per-install (PPI) malware service known as PrivateLoader has been spotted distributing a "fairly sophisticated" framework called NetDooka, granting attackers complete control over the infected devices. "The framework is distributed via a pay-per-install (PPI) service and contains multiple parts, including a loader, a dropper, a protection driver, and a full-featured remote access trojan (RAT) that implements its own network communication protocol," Trend Micro  said  in a report published Thursday. PrivateLoader, as documented by Intel 471 in February 2022, functions as a downloader responsible for downloading and installing additional malware onto the infected system, including SmokeLoader, RedLine Stealer, Vidar, Raccoon, GCleaner, and  Anubis . Featuring anti-analysis techniques, PrivateLoader is written in the C++ programming language and is said to be in active development, with the downloader malware family gaining traction among multiple threat ac...
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