While responding to an incident at one of their clients, the PT ESC CSIRT team discovered a previously unknown backdoor written in Go, which they attributed to a cybercrime gang dubbed ExCobalt.
ExCobalt focuses on cyberespionage and includes several members active since at least 2016 and presumably once part of the notorious Cobalt gang. Cobalt attacked financial institutions to steal funds. One of Cobalt’s hallmarks was the use of the CobInt tool, something ExCobalt began to use in 2022. Over the past year, the PT ESC has recorded attacks linked to ExCobalt and investigated related incidents at Russian organizations in the following sectors: Metallurgy, Telecommunications, Mining, Information technology, Government, Software development
Read more…
Source: Positive Technologies
Related:
- Finding and Decoding Multi-Step Obfuscated Malware
February 2, 2021
Recently, in the process of a threat investigation, Trend Micro researchers found an interesting event. A process (nslookup.exe) that tried to connect to a malicious URL that was already blocked by trend Micro solutions. We could have stopped at this point, but searching for the root cause is part of managed detection and response (MDR) — ...
- Raindrop Backdoor: New Malware Discovered in SolarWinds Investigation
January 20, 2021
Symantec, a division of Broadcom, has uncovered an additional piece of malware used in the SolarWinds attacks which was used against a select number of victims that were of interest to the attackers. Raindrop (Backdoor.Raindrop) is a loader which delivers a payload of Cobalt Strike. Raindrop is very similar to the already documented Teardrop tool, but ...
- XDR investigation uncovers PlugX, unique technique in APT attack
January 20, 2021
Advanced persistent threats (APT) are known — and are universally dreaded — for their stealth. Actors behind such attacks actively innovate their techniques to evade detection and ensure that they maintain a foothold inside an environment as long as possible. Through the Apex One with Endpoint Sensor (iES), we discovered one such incident wherein an ...
- VPNFilter Two Years Later: Routers Still Compromised
January 19, 2021
With the internet of things (IoT) gaining more popularity, common IoT devices such as routers, printers, cameras, and network-attached storage (NAS) devices, are becoming more frequent targets for cybercriminals. Unlike typical operating systems such as Windows and macOS, users are less likely to patch IoT devices. This is because users find the task more difficult and ...
- Sunburst backdoor – code overlaps with Kazuar
January 11, 2021
On December 13, 2020, FireEye published a blog post detailing a supply chain attack leveraging Orion IT, an infrastructure monitoring and management platform by SolarWinds. In parallel, Volexity published an article with their analysis of related attacks, attributed to an actor named “Dark Halo”. FireEye did not link this activity to any known actor; instead, ...
- Adversary Infrastructure Report 2020: A Defender’s View
January 8, 2021
Recorded Future tracks the creation and modification of new malicious infrastructure for a multitude of post-exploitation toolkits, custom malware frameworks, and open-source remote access trojans. The effort has been ongoing since 2017, when Insikt Group created methodologies to identify the deployments of open-source remote access trojans (RATs). Recorded Future collected over 10,000 unique command and control ...