Four zero-day vulnerabilities in Microsoft Exchange Servers have been linked to more than 30,000 cyber attacks taking place in the week following their discovery. Prior to the flaws being revealed, Chinese nation-state threat actors had already exploited them to infiltrate numerous companies and access their data. Even since a patch was released, many other threat groups have found success using the vulnerabilities (including in ransomware attacks). This rapidly drove up the number of daily attacks between 11 and 17 of March 2021: from 700 to 7,200. Compounding the problem are proof of concept (PoC) exploit codes published on GitHub, which cybercriminals quickly shared on forums. The widespread use of the servers and distribution of PoCs will likely lead to persistent targeting of unpatched Exchange Servers in the short-term future (one to three months).
Most Recent Flipbooks
Weekly Intelligence Summary 18 June
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Weekly Intelligence Summary 11 June
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Weekly Intelligence Summary 04 June
The latest work of the notorious Russian state-associated “NOBELIUM” threat group is an email phishing campaign against multiple countries and sectors.
Weekly Intelligence Summary 28 May
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Weekly Intelligence Summary 21 May
A “Conti” ransomware attack on Ireland’s healthcare system, the Health Service Executive (HSE), significantly delayed the delivery of medical laboratory results and affected many outpatient services.
Weekly Intelligence Summary 14 May
Colonial Pipeline Company fell victim to a cyber attack that resulted in 5,500 miles of its US fuel pipelines being shut down, causing public distress and fears of fuel shortages.
Weekly Intelligence Summary 07 May
Security researchers discovered two unrelated cyber-threat campaigns targeting Microsoft SharePoint.
Weekly Intelligence Summary 23 April
The FBI made digital copies of malicious web-shells before removing them from hundreds of vulnerable servers in the US, without any warning to affected organizations.
Weekly Intelligence Summary 16 April
A cyber-espionage campaign was found targeting the Vietnamese military and government, as well as other sectors and some entities in Thailand and Central Asia.
Weekly Intelligence Summary 09 April
A user of the cybercriminal forum RaidForums has offered 533 million records of Facebook user data for only a few US dollars.
Weekly Intelligence Summary 02 April
Insurance provider CNA Financial has announced it was targeted in a cyber attack, later confirmed as involving the newly identified “Phoenix Cryptolocker” ransomware.
Weekly Intelligence Summary 26 March
The new Internet of Things (IoT) botnet ZHtrap has been turning devices it has infected into honeypots, in a novel technique that highlights yet another risk presented by exposed IoT devices.
Weekly Intelligence Summary 12 March
A new round of software attacks has raised another red flag concerning supply-chain security and the prevalence of third-party supply-chain targeting.
Weekly Intelligence Summary 05 March
The French National Cybersecurity Agency (ANSSI) identified a new “Ryuk” ransomware variant that has the capability to self-propagate across victim networks.
Weekly Intelligence Summary 26 February
The People’s Republic of China-linked advanced persistent threat group “APT31” reportedly cloned and deployed a zero-day exploit developed by NSA's Equation Group in 2013.
Weekly Intelligence Summary 19 February
An unidentified attacker accessed the computer systems of a water treatment facility in the US, altering sodium hydroxide levels in the potable water supply.
Weekly Intelligence Summary 12 February
Following the disclosure of the SolarWinds supply-chain compromise in December 2020, details continue to emerge about the scale of the attack.
Weekly Intelligence Summary 05 February
The North Korean advanced persistent threat (APT) group “ZINC” has been targeting cyber-security professionals with social engineering that leads to malware delivery.
Weekly Intelligence Summary 29 January
A new web portal is aiding cyber-threat incident responders by detailing vulnerabilities in popular malware.