New Malware Targets Windows Subsystem for Linux to Evade Detection

A number of malicious samples have been created for the Windows Subsystem for Linux WSL with the goal of compromising Windows machines, highlighting a sneaky method that allows the operators to stay under the radar and thwart detection by popular anti-malware engines. The "distinct tradecraft"...

Linux Implementation of Cobalt Strike Beacon Targeting Organizations Worldwide

Researchers on Monday took the wraps off a newly discovered Linux and Windows re-implementation of Cobalt Strike Beacon that's actively set its sights on government, telecommunications, information technology, and financial institutions in the wild. The as-yet undetected version of the penetratio...

TeamTNT’s New Tools Target Multiple OSes

The TeamTNT malware pushers have a slew of new toys with which to wreak havoc – multiple shell/batch scripts, open-source tools, a cryptocurrency miner, an IRC and more – that have inflicted more than 5,000 infections globally as antivirus AV tools struggle to catch up with the newest malware...

Experts Uncover Mobile Spyware Attacks Targeting Kurdish Ethnic Group

Cybersecurity researchers on Tuesday released new findings that reveal a year-long mobile espionage campaign against the Kurdish ethnic group to deploy two Android backdoors that masquerade as legitimate apps. Active since at least March 2020, the attacks leveraged as many as six dedicated Facebo...

Cisco Web Security Appliance (WSA) Server Name Identification Data Exfiltration (cisco-sa-sni-data-exfil-mFgzXqLN)

According to its self-reported version, Cisco Web Security Appliance WSA is affected by a vulnerability in Server Name Identification SNI request filtering that allows an unauthenticated, remote attacker to bypass filtering technology on an affected device and exfiltrate data from a compromised...

ShadowPad Malware is Becoming a Favorite Choice of Chinese Espionage Groups

ShadowPad, an infamous Windows backdoor that allows attackers to download further malicious modules or steal data, has been put to use by five different Chinese threat clusters since 2017. "The adoption of ShadowPad significantly reduces the costs of development and maintenance for threat actors,...

How Ready Are You for a Ransomware Attack?

Determining how hard a target you present for the current wave of human-driven ransomware involves multiple considerations. There are four steps to analyzing how prepared you are for a ransomware attack. Such analysis roughly breaks down as follows: 1 How easy it is to break into your environment...

Researchers Find New Evidence Linking Diavol Ransomware to TrickBot Gang

Cybersecurity researchers have disclosed details about an early development version of a nascent ransomware strain called Diavol that has been linked to threat actors behind the infamous TrickBot syndicate. The latest findings from IBM X-Force show that the ransomware sample shares similarities t...

CVE-2021-34749

A vulnerability in Server Name Identification SNI request filtering of Cisco Web Security Appliance WSA, Cisco Firepower Threat Defense FTD, and the Snort detection engine could allow an unauthenticated, remote attacker to bypass filtering technology on an affected device and exfiltrate data from...

CVE-2021-34749

A vulnerability in Server Name Identification SNI request filtering of Cisco Web Security Appliance WSA, Cisco Firepower Threat Defense FTD, and the Snort detection engine could allow an unauthenticated, remote attacker to bypass filtering technology on an affected device and exfiltrate data from...

Command injection

A vulnerability in Server Name Identification SNI request filtering of Cisco Web Security Appliance WSA, Cisco Firepower Threat Defense FTD, and the Snort detection engine could allow an unauthenticated, remote attacker to bypass filtering technology on an affected device and exfiltrate data from...

CVE-2021-34749

CVE-2021-34749 affects Cisco WSA/FTD and the Snort detection engine. The issue stems from inadequate filtering of the SSL handshake in the SNI data path, allowing an unauthenticated remote attacker to bypass filters and exfiltrate data from a compromised host, potentially enabling command-and-con...

CVE-2021-34749 Multiple Cisco Products Server Name Identification Data Exfiltration Vulnerability

A vulnerability in Server Name Identification SNI request filtering of Cisco Web Security Appliance WSA, Cisco Firepower Threat Defense FTD, and the Snort detection engine could allow an unauthenticated, remote attacker to bypass filtering technology on an affected device and exfiltrate data from...

PT-2021-3823 · Cisco · Snort +2

Name of the Vulnerable Software and Affected Versions: Cisco Web Security Appliance affected versions not specified Cisco Firepower Threat Defense affected versions not specified Snort detection engine affected versions not specified Description: A vulnerability in Server Name Identification SNI...

CVE-2021-36798

A Denial-of-Service DoS vulnerability was discovered in Team Server in HelpSystems Cobalt Strike 4.2 and 4.3. It allows remote attackers to crash the C2 server thread and block beacons' communication with it...

Angry Affiliate Leaks Conti Ransomware Gang Playbook

An apparently vengeful affiliate of the Conti Gang has leaked the playbook of the ransomware group after alleging that the notorious cybercriminal organization underpaid him for doing its dirty work. A security researcher shared a comment from an online forum allegedly posted by someone who did...

New Chinese Spyware Being Used in Widespread Cyber Espionage Attacks

A threat actor presumed to be of Chinese origin has been linked to a series of 10 attacks targeting Mongolia, Russia, Belarus, Canada, and the U.S. from January to July 2021 that involve the deployment of a remote access trojan RAT on infected systems, according to new research. The intrusions ha...

Defending Against Malicious Cyber Activity Originating from Tor

Summary This advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge ATT &CK® and Pre-ATT&CK framework. See the ATT&CK for Enterprise and Pre-ATT&CK frameworks for referenced threat actor techniques. This advisory—written by the Cybersecurity Security and Infrastructure...

Chinese Hackers Implant PlugX Variant on Compromised MS Exchange Servers

A Chinese cyberespionage group known for targeting Southeast Asia leveraged flaws in the Microsoft Exchange Server that came to light earlier this March to deploy a previously undocumented variant of a remote access trojan RAT on compromised systems. Attributing the intrusions to a threat actor...

Combing through the fuzz: Using fuzzy hashing and deep learning to counter malware detection evasion techniques

Today’s cybersecurity threats continue to find ways to fly and stay under the radar. Cybercriminals use polymorphic malware because a slight change in the binary code or script could allow the said threats to avoid detection by traditional antivirus software. Threat actors customize their wares...