Chaos RaaS Emerges After BlackSuit Takedown, Demanding $300K from U.S. Victims

A newly emerged ransomware-as-a-service RaaS gang called Chaos is likely made up of former members of the BlackSuit crew, as the latter's dark web infrastructure has been the subject of a law enforcement seizure. Chaos, which sprang forth in February 2025, is the latest entrant in the ransomware...

Unwrapping the emerging Interlock ransomware attack

Cisco Talos Incident Response Talos IR recently observed an attacker conducting big-game hunting and double extortion attacks using the relatively new Interlock ransomware. Our analysis uncovered that the attacker used multiple components in the delivery chain including a Remote Access Tool RAT...

2024 State of Malware in Education report: Top 6 cyberthreats facing K-12 and Higher Ed

Educational institutions may face a range of cyberthreats in 2024, but our 2024 State of Malware in Education report identifies the six most critical ones. Ransomware, for example, stands out as a key threat for schools and universities. The report covers how last year, we witnessed a 92% increas...

3 important lessons from a devastating ransomware attack

In October 2023, The British Library was attacked by the Rhysida ransomware gang in a devastating cyberattack. The library, a vast repository of over 170 million items, is still deep in the recovery process, but recently released an eighteen page cyber incident review describing the attack, its...

Ransomware review: March 2024

This article is based on research by Marcelo Rivero, Malwarebytes ransomware specialist, who monitors information published by ransomware gangs on their Dark Web sites. In this report, "known attacks" are those where the victim did not pay a ransom. This provides the best overall picture of...

ALPHV is singling out healthcare sector, say FBI and CISA

In an updated StopRansomware security advisory, the Cybersecurity and Infrastructure Security Agency CISA, the Federal Bureau of Investigation FBI, and the Department of Health and Human Services HHS has warned the healthcare industry about the danger of the ALPHV ransomware group, also known as...

Europol Dismantles Ragnar Locker Ransomware Infrastructure, Nabs Key Developer

Europol on Friday announced the takedown of the infrastructure associated with Ragnar Locker ransomware, alongside the arrest of a "key target" in France. "In an action carried out between 16 and 20 October, searches were conducted in Czechia, Spain, and Latvia," the agency said. "The main...

Ransomware review: August 2023

This article is based on research by Marcelo Rivero, Malwarebytes' ransomware specialist, who monitors information published by ransomware gangs on their Dark Web sites. In this report, "known attacks" are those where the victim did not pay a ransom. This provides the best overall picture of...

Ransomware Extortion Skyrockets in 2023, Reaching $449.1 Million and Counting

Ransomware has emerged as the only cryptocurrency-based crime to grow in 2023, with cybercriminals extorting nearly $175.8 million more than they did a year ago, according to findings from Chainalysis. "Ransomware attackers are on pace for their second-biggest year ever, having extorted at least...

Threat Source newsletter (May 26, 2022) — BlackByte adds itself to the grocery list of big game hunters

By Jon Munshaw. Welcome to this week’s edition of the Threat Source newsletter. Given the recent tragedies in the U.S., I don’t feel it’s appropriate to open by being nostalgic or trying to be witty — let’s just stick to some security news this week. The one big... This is only the beginning!...

biggamefishingri.com Improper Access Control vulnerability OBB-2425951

Following the coordinated and responsible vulnerability disclosure guidelines of the ISO 29147 standard, Open Bug Bounty has: a. verified the vulnerability and confirmed its existence; b. notified the website operator about its existence. Technical details of the vulnerability are currently hidde...

Avaddon ransomware campaign prompts warnings from FBI, ACSC

Both the Australian Cyber Security Centre ACSC and the US Federal Bureau of Investigation FBI have issued warnings about an ongoing cybercrime campaign that is using Avaddon ransomware. The FBI states that is has received notifications of unidentified cyber actors using Avaddon ransomware against...

A Closer Look at the DarkSide Ransomware Gang

The FBI confirmed this week that a relatively new ransomware group known as DarkSide is responsible for an attack that caused Colonial Pipeline to shut down 5,550 miles of pipe, stranding countless barrels of gasoline, diesel and jet fuel on the Gulf Coast. Heres a closer look at the DarkSide...

FBI warns of increase in PYSA ransomware attacks targeting education

On March 16, the Federal Bureau of Investigation FBI issued a "Flash" alert on PYSA ransomware after an uptick on attacks this month against institutions in the education sector, particularly higher ed, K-12, and seminaries. According to the alert PDF, the United Kingdom and 12 states in the US...

WastedLocker Goes "Big-Game Hunting" in 2020

By Ben Baker, Edmund Brumaghin, JJ Cummings and Arnaud Zobec. Threat summary After initially compromising corporate networks, the attacker behind WastedLocker performs privilege escalation and lateral movement prior to activating ransomware and demanding ransom payment.The use of "dual-use" tools...

Looks Like Russian Hackers Are on an Email Scam Spree

A group dubbed Cosmic Lynx uses surprisingly sophisticated methods—and targets big game...

AZORult brings friends to the party

By Vanja Svajcer. NEWS SUMMARY We are used to ransomware attacks and big game hunting making the headlines, but there is an undercurrent of other attack types that allow attackers to monetize their efforts in a less intrusive way.Here, we discuss a multi-pronged cyber criminal attack using a numb...

Threat spotlight: the curious case of Ryuk ransomware

Ryuk. A name once unique to a fictional character in a popular Japanese comic book and cartoon series is now a name that appears in several rosters of the nastiest ransomware to ever grace the wild web. For an incredibly young strain—only 15 months old—Ryuk ransomware gaining such notoriety is...