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:
- Sophos fixes critical firewall hole exploited by miscreants
September 28, 2022
A critical code-injection vulnerability in Sophos Firewall has been fixed — but not before miscreants found and exploited the bug. The flaw, tracked as CVE-2022-3236, exists in the User Portal and Webadmin components of the firewall in versions 19.0 and older. While it hasn’t been issued a CVSS severity score, Sophos deemed it “critical” and noted ...
- Prilex: the pricey prickle credit card complex
September 28, 2022
Prilex is a Brazilian threat actor that has evolved out of ATM-focused malware into modular point-of-sale malware. The group was behind one of the largest attacks on ATMs in the country, infecting and jackpotting more than 1,000 machines, while also cloning in excess of 28,000 credit cards that were used in these ATMs before the ...
- Leaked LockBit 3.0 builder used by ‘Bl00dy’ ransomware gang in attacks
September 28, 2022
The relatively new Bl00Dy Ransomware Gang has started to use a recently leaked LockBit ransomware builder in attacks against companies. Last week, the LockBit 3.0 ransomware builder was leaked on Twitter after the LockBit operator had a falling out with his developer. This builder allows anyone to build a fully functional encryptor and decryptor that threat ...
- New campaign uses government, union-themed lures to deliver Cobalt Strike beacons
September 28, 2022
Cisco Talos recently discovered a malicious campaign with a modularised attack technique to deliver Cobalt Strike beacons on infected endpoints. The initial vector of this attack is a phishing email with a malicious Microsoft Word document attachment containing an exploit that attempts to exploit the vulnerability CVE-2017-0199, a remote code execution issue in Microsoft Office. If ...
- New NullMixer dropper infects your PC with a dozen malware families
September 27, 2022
A new malware dropper named ‘NullMixer’ is infecting Windows devices with a dozen different malware families simultaneously through fake software cracks promoted on malicious sites in Google Search results. NullMixer acts as an infection funnel, using a single Windows executable to launch a dozen different malware families, leading to over two dozen infections running a single ...
- SQL Server admins warned about Fargo ransomware
September 26, 2022
Organizations are being warned about a wave of attacks targeting Microsoft SQL Server with ransomware known as Fargo, which encrypts files and threatens victims that their data may be published online if they do not pay up. The warning comes in a blog posting from analysts at the AhnLab Security Emergency Response Center (ASEC), which says ...