SophosLabs analysts investigated WantToCry ransomware attacks that involved the threat actors abusing the Server Message Block (SMB) service for initial access and then exfiltrating files to attacker-controlled infrastructure for remote encryption. The detection surface is significantly reduced because WantToCry operates without local malware execution, and there is no post-compromise activity beyond exfiltrating files and rewriting them to disk.
Read more…
Source: SophosLabs
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- Critical F5 BIG-IP bug impacts customers in sensitive sectors
August 25, 2021
BIG-IP application services company F5 has fixed more than a dozen high-severity vulnerabilities in its networking device, one of them being elevated to critical severity under specific conditions. The issues are part of this month’s delivery of security updates, which addresses almost 30 vulnerabilities for multiple F5 devices.. Of the thirteen high-severity flaws that F5 fixed, one ...
- New Campaign Sees LokiBot Delivered Via Multiple Methods
August 25, 2021
Trend Micro researchers recently detected an aggressive malware distribution campaign delivering LokiBot via multiple techniques, including the exploitation of older vulnerabilities. This blog entry describes and provides an example of one the methods used in the campaign, as well as a short analysis of the payload. We found that one of the command-and-control (C&C) servers ...
- Worldwide Phishing Attacks Ramped Up At the Peak of Working From Home
August 25, 2021
With more and more companies choosing to allow for flexible (hybrid/remote) work environments post-pandemic, we investigated the unique cyberthreats employees working from home face. Palo Alto analysis focused primarily on trends in Palo Alto firewall traffic and phishing pages detected by our URL Filtering service from September 2019 to April 2021. We found that in early ...
- Triada Trojan in WhatsApp mod
August 24, 2021
WhatsApp users sometimes feel the official app is lacking a useful feature of one sort or another, be it animated themes, self-destructing messages which automatically delete themselves, the option of hiding certain conversations from the main list, automatic translation of messages, or the option of viewing messages that have been deleted by the sender. This ...
- APT41 Resurfaces as Earth Baku With New Cyberespionage Campaign
August 24, 2021
Trend Micro researchers have uncovered a cyberespionage campaign being perpetrated by Earth Baku, an advanced persistent threat (APT) group with a known history of carrying out cyberattacks under the alias APT41. This is not the group’s first foray into cyberespionage, and its long list of past cybercrimes also includes ransomware and cryptocurrency mining attacks. Earth Baku ...
- Ransomware Groups to Watch: Emerging Threats
August 24, 2021
As part of Unit 42’s commitment to stop ransomware attacks, we conduct ransomware hunting operations to ensure our customers are protected against new and evolving ransomware variants. We monitor the activity of existing groups, search for dark web leak sites and fresh onion sites, identify up-and-coming players and study tactics, techniques and procedures. During our operations, ...