Retrohunting APT37: North Korean APT used VBA self decode technique to inject RokRat

This post was authored by Hossein Jazi On December 7 2020 we identified a malicious document uploaded to Virus Total which was purporting to be a meeting request likely used to target the government of South Korea. The meeting date mentioned in the document was 23 Jan 2020, which aligns with the...

ScarCruft APT Adds Bluetooth Harvester to its Malware Bag of Tricks

The ScarCruft Korean-speaking APT is changing up its espionage tactics to include an unusual piece of malware devoted to harvesting Bluetooth information – while also showing some overlap with the DarkHotel APT. An analysis of ScarCruft’s binary infection procedure by Kaspersky Lab shows that in ...

ScarCruft continues to evolve, introduces Bluetooth harvester

Executive summary After publishing our initial series of blogposts back in 2016, we have continued to track the ScarCruft threat actor. ScarCruft is a Korean-speaking and allegedly state-sponsored threat actor that usually targets organizations and companies with links to the Korean peninsula. Th...

Threat Analysis: ROKRAT Malware

ROKRAT also referred to as DOGcall is a family of malware that has been used by attackers originating from North Korea. The family continues to evolve and adopt techniques from other families also used by the same attack group. The ROKRAT core payload is typically deployed by a loader, which has...

Adobe Flash Player Use After Free Remote Code Execution Vulnerability(CVE-2018-4878)

EXECUTIVE SUMMARY The 1st of February, Adobe published an advisory concerning a Flash vulnerability CVE-2018-4878. This vulnerability is a use after free that allows Remote Code Execute through a malformed Flash object. Additionally KISA Korean CERT published an advisory about a Flash 0-day used ...

New Flash Player zero-day comes inside Office document

Update 2018-02-06: Adobe has released a patch for this vulnerability. More information is available here. We tested this zero-day with a proof-of concept that was made available. Rather than launching it from within Office, we turned it into a drive-by download attack. The animation below shows...

Flash 0-Day In The Wild: Group 123 At The Controls

This blog post is authored by Warren Mercer and Paul Rascagneres. Executive Summary The 1st of February, Adobe published an advisory concerning a Flash vulnerability CVE-2018-4878. This vulnerability is a use after free that allows Remote Code Execute through a malformed Flash object. Additionall...

Korea In The Crosshairs

This blog post is authored by Warren Mercer and Paul Rascagneres and with contributions from Jungsoo An. A one year review of campaigns performed by an actor with multiple campaigns mainly linked to South Korean targets. Executive Summary This article exposes the malicious activities of Group 123...

ROKRAT Reloaded

This post was authored by Warren Mercer, Paul Rascagneres and with contributions from Jungsoo An.Executive SummaryEarlier this year, Talos published 2 articles concerning South Korean threats. The first one was about the use of a malicious HWP document which dropped downloaders used to retrieve...

New RAT Targets Koreans And Is Skilled At Evading Detection

Researchers have identified a stealthy new remote access tool dubbed ROKRAT that leverages a bevy of anti-detection measures. The RAT targets the Korean language Microsoft Word alternative Hangul Word Processor HWP. ROKRAT was detected several weeks ago by Cisco Talos, who said the malware is par...