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Subtle ‘Darkish Pink’ APT Targets Authorities, Navy Organizations

By Ionut Arghire on January 12, 2023

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Cybersecurity agency Group-IB is elevating the alarm on a newly recognized superior persistent menace (APT) actor focusing on authorities and navy organizations in Asia and Europe.

Known as Darkish Pink, the menace actor was seen launching seven profitable assaults in opposition to high-profile targets since June 2022, however it seems to have been energetic since no less than mid-2021, primarily based on the exercise related to a GitHub account.

Between June and December 2022, Darkish Pink efficiently breached navy and authorities companies, a spiritual group, and a non-profit group. The targets had been situated in Bosnia and Herzegovina, Cambodia, Indonesia, Malaysia, the Philippines, and Vietnam.

Throughout the identical interval, the hacking group additionally launched a cyberattack in opposition to a European state growth company primarily based in Vietnam.

The techniques, methods, and procedures (TTPs) utilized by the menace actor are “hardly ever utilized by beforehand recognized APT teams”, such because the execution of malware triggered by a file sort affiliation, along with DLL sideloading.

Darkish Pink makes use of PowerShell scripts and customized info stealers (Cucky and Ctealer) and trojans (KamiKakaBot and TelePowerBot), can infect USB drives linked to the sufferer’s machine, and depends on the Telegram API for communication with the contaminated units.

“Darkish Pink APT’s main targets are to conduct company espionage, steal paperwork, seize the sound from the microphones of contaminated units, and exfiltrate information from messengers,” Group-IB notes.

The hacking group makes use of job application-themed spear-phishing emails containing a shortened hyperlink, luring victims into downloading a malicious ISO picture. The APT seems to be scanning on-line job emptiness portals for related info to incorporate within the tailor-made emails despatched to victims.

The malicious ISO photos seem tailor-made for every sufferer, containing a signed executable, a decoy doc, and a malicious DLL file. The executable poses as a Phrase doc containing the applicant’s resume, however is supposed to load the malicious DLL.

Group-IB recognized three totally different execution chains employed by Darkish Pink, the place the malicious DLL is sideloaded to execute TelePowerBot or KamiKakaBot – together with the Ctealer or Cucky info stealers – and to make sure persistence.

Following the preliminary compromise, Darkish Pink proceeds to reap info (system information, browser information, put in purposes, and linked USB drives and community shares) and to maneuver laterally on the community.

The attackers additionally register a brand new WMI occasion handler, so {that a} malware dropper is positioned on any USB drive that the sufferer connects to the system. The required recordsdata are fetched from the menace actors’ GitHub account, and LNK recordsdata (named the identical because the consumer’s folders) are positioned on the USB drive.

The info harvested by Darkish Pink’s malware is exfiltrated in ZIP archives to the attackers’ Telegram bot or by way of Dropbox.

The APT additionally leverages a number of methods to bypass Person Account Management (UAC) and modify Home windows Defender settings, and was additionally seen utilizing the publicly obtainable PowerSploit module Get-MicrophoneAudio to file the microphone audio on contaminated units.

Associated: New ‘ToddyCat’ APT Targets Excessive-Profile Entities in Europe, Asia

Associated: Russian APT Gamaredon Modifications Techniques in Assaults Focusing on Ukraine

Associated: Iran-Linked OilRig APT Caught Utilizing New Backdoor

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