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Russian APT Gamaredon Modifications Techniques in Assaults Focusing on Ukraine

By Ionut Arghire on December 21, 2022

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Russia-linked Gamaredon, a hacking group recognized for offering companies to different superior persistent risk (APT) actors, is among the most intrusive, repeatedly lively APTs focusing on Ukraine, Palo Alto Networks’ Unit 42 warns.

Also called Armageddon, Primitive Bear, Shuckworm, and Trident Ursa, Gamaredon has been lively since at the very least 2013, primarily centered on targets in Ukraine. The APT depends on phishing emails for malware distribution and gives entry to compromised networks and intelligence to different risk actors.

Over the previous ten months, Gamaredon was seen focusing on a big petroleum refining firm, in addition to altering its ways, methods, and procedures (TTPs) a number of occasions.

Historically, the hacking group was seen utilizing phishing lures within the Ukrainian language, nevertheless it additionally employed English language lures in some instances, prone to enhance community entry and intelligence assortment towards each Ukraine and NATO members, Unit 42 notes.

On the finish of August, the risk actor unsuccessfully tried to compromise “a big petroleum refining firm inside a NATO member nation” utilizing English language lures.

Unit 42’s safety researchers additionally found that, on February 24, the identical day that Russia invaded Ukraine, a person named Anton, who seems to have ties to Gamaredon, threatened a bunch of cybersecurity researchers who printed tweets highlighting the group’s indicators of compromise (IoCs).

Over the following few days, Anton used a number of accounts to publish threatening tweets that featured the Gamaredon hashtag, together with one containing the complete title and handle of Mikhail Kasimov, a researcher working from throughout the warfare zone.

Over the previous six months, the group was noticed utilizing varied DNS-related methods to extend the resilience of their operations, resembling the usage of “professional companies to question IP assignments for malicious domains”, successfully bypassing DNS and DNS logging, Unit 42 says.

The APT was additionally seen utilizing Telegram messenger content material to establish the newest IP used for command-and-control (C&C), flooding the quick flux DNS tables of its root domains with ‘junk’ IPs and utilizing subdomains, and counting on digital personal server (VPS) suppliers in an autonomous system (AS) for operational infrastructure exterior Russia.

Gamaredon continues to depend on .html information and Phrase paperwork for malware supply and has been noticed utilizing two totally different droppers over the previous three months, specifically a 7-Zip self-extracting (SFX) archive and a loader that depends on wscript to execute two dropped information.

Regardless of having its operations publicly detailed a number of occasions, Gamaredon continues to make use of the identical easy methods, primarily counting on heavy obfuscation and publicly out there instruments, and even reuses code in new assaults, usually registering success in its operations and remaining a significant cyberthreat to Ukraine, Unit 42 concludes.

Associated: Extra Russian Assaults Towards Ukraine Come to Mild

Associated: Extremely Lively ‘Gamaredon’ Group Gives Providers to Different APTs

Associated: Ukraine Names Russian FSB Officers Concerned in Gamaredon Cyberattacks

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