Malware

November 22, 2023

In the course of our routine investigation, we discovered a DLL file, identified as hrserv.dll, which is a previously unknown web shell exhibiting sophisticated features such as custom encoding methods for client communication and in-memory execution. Kaspersky analysis of the sample led to the discovery of related variants compiled in 2021, indicating a potential correlation between ...

November 22, 2023

Microsoft Threat Intelligence has uncovered a supply chain attack by the North Korea-based threat actor Diamond Sleet (ZINC) involving a malicious variant of an application developed by CyberLink Corp., a software company that develops multimedia software products. This malicious file is a legitimate CyberLink application installer that has been modified to include malicious code that downloads, ...

November 20, 2023

FortiGuard Labs recently identified the use of a Russian-language Word document equipped with a malicious macro in the ongoing Konni campaign. Despite the document’s creation date of September, ongoing activity on the campaign’s C2 server is evident in internal telemetry. This campaign relies on a remote access trojan (RAT) capable of extracting information and executing commands ...

November 20, 2023

Microsoft has observed ongoing activity from mobile banking trojan campaigns targeting users in India with social media messages designed to steal users’ information for financial fraud. Using social media platforms like WhatsApp and Telegram, attackers are sending messages designed to lure users into installing a malicious app on their mobile device by impersonating legitimate organizations, such ...

November 17, 2023

Gamaredon, also known as Primitive Bear, ACTINIUM, and Shuckworm, is a unique player in the Russian espionage ecosystem that targets a wide variety of almost exclusively Ukrainian entities. While researchers often struggle to uncover evidence of Russian espionage activities, Gamaredon is notably conspicuous. The group behind it conducts large-scale campaigns while still primarily focusing on regional ...

November 15, 2023

The Rhysida group was first identified in May 2023, when they claimed their first victim. This group deploys a ransomware variant known as Rhysida and also offers it as Ransomware-as-a-service (RaaS). The group has listed around 50 victims so far in 2023. The investigation conducted by the FortiGuard IR team and MDR team uncovered some of ...

November 9, 2023

This report consists of six main sections – Incidents involving Asian APT groups in various regions of the planet Information on five unique incidents that Kaspersky researchers detected in different parts of the world. Each incident is a unique case within a specific country and industry, and they provide a description of the actions and TTPs ...

October 30, 2023

Proofpoint researchers identified TA571 delivering the Forked variant of IcedID in two campaigns on 11 and 18 October 2023. Both campaigns included over 6,000 messages, each impacting over 1,200 customers in a variety of industries globally. Emails in the campaigns purported to be replies to existing threads. This is known as thread hijacking. The emails contained ...

October 26, 2023

It’s just another cryptocurrency miner… Nobody would even suspect the mining malware was merely a mask, masquerading behind an intricate modular framework that supports both Linux and Windows. It comes equipped with a built-in TOR network tunnel for communication with command servers, along with update and delivery functionality through trusted services such as GitLab, GitHub, ...

October 25, 2023

Mystic Stealer is a relatively new downloader and information stealer that emerged in early 2023. The malware harvests data from a large number of web browsers and cryptocurrency wallet applications. Mystic can also be used to steal Steam game credentials and arbitrary files from an infected system. Mystic stands out for the level of obfuscation ...