North Korea ScarCruft APT used beforehand undetected Dolphin Backdoor in opposition to South KoreaSecurity Affairs | Tech In a position

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The North Korea-linked ScarCruft group used a beforehand undocumented backdoor known as Dolphin in opposition to targets in South Korea.

ESET researchers found a beforehand undocumented backdoor known as Dolphin that was employed by the North Korea-linked ScarCruft group (also called APT37, Reaper, and Group123) in focused assaults in South Korea.

ScarCruft has been energetic since not less than 2012, making headlines in early February 2018 when researchers revealed that the APT group exploited a zero-day vulnerability in Adobe Flash Participant to ship malware to customers in South Korea.

Kaspersky first documented the group’s operations in 2016. Cyberattacks carried out by the APT37 group primarily focused authorities, protection, army, and media organizations in South Korea.

Dolphin’s backdoor helps a variety of spying capabilities, together with monitoring drives and transportable gadgets and leaking recordsdata of curiosity, keylogging and display capturing, and stealing browser credentials.

This backdoor was used in opposition to chosen targets, delivered utilizing much less subtle malware. Dolphin abuses Google Drive cloud storage for Command and Management communication.

“Throughout our investigation, we noticed continued growth of the backdoor and makes an attempt by malware authors to evade detection. One notable function of earlier variations of Dolphin that we reviewed is the flexibility to change the settings of victims’ Google and Gmail accounts to cut back their safety, most probably to take care of entry to victims’ e-mail inboxes. ”. learn the put up revealed by ESET.

The Dolphin backdoor was used as the ultimate payload of a multi-stage watering gap assault in early 2021. Risk actors used the implant in opposition to a South Korean on-line newspaper, the APT group additionally relied on an Web Explorer exploit and used one other backdoor known as BLUELIGHT (beforehand reported by safety companies Volexity and Kaspersky).

tailgate dolphin

Some of the attention-grabbing options of earlier variations of Dolphin examined by ESET is the flexibility to change the settings of victims’ Google and Gmail accounts to cut back their safety and keep away from detection.

“It steals the prevailing cookie from the logged in browser account and creates requests that modify the settings.” report continues.

Dolphin’s loader is made up of a Python script and shellcode, whereas the core backdoor is a Home windows executable written in C++.

“Dolphin is yet one more addition to ScarCruft’s intensive arsenal of backdoors abusing cloud storage companies,” concludes the report, which additionally offers indicators of compromise (IoC) for the backdoor. “An uncommon functionality present in earlier variations of the backdoor is the flexibility to change the settings of victims’ Google and Gmail accounts to cut back their safety, presumably to take care of account entry for attackers.”

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Pierluigi Paganini

(Safety Points hacking, Dolphin backdoor)













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North Korea ScarCruft APT used previously undetected Dolphin Backdoor against South KoreaSecurity Affairs

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