Detecting Akira Ransomware Attack Using AhnLab EDR
Akira is a relatively new ransomware threat actor that has been active since March 2023. Like other ransomware threat actors, they breach organizations and not only encrypt their files but also exfiltrate sensitive information to use in negotiations. As shown in the following 2024 statistics, the number of companies affected
AhnLab EDR Detects CoinMiner Propagated via USB in South Korea
1. Overview CoinMiners typically secretly use the CPU and GPU resources of users’ computers to mine cryptocurrencies, which slows down the performance of the affected computers. CoinMiners are usually distributed through phishing emails, malicious websites, system vulnerabilities, and other means. For analysis of this malware, please refer to the AhnLab
Play Ransomware Attack Cases Detected by AhnLab EDR
Play ransomware, also known as Balloonfly or PlayCrypt, was first identified in June 2022 and has reportedly attacked over 300 organizations worldwide since then. A notable characteristic of the ransomware, which remains actively in use, is its addition of the “.PLAY” extension to files following encryption. Like other ransomware threat
Proxy Tools Detected by AhnLab EDR
After gaining control over infected systems, threat actors may also perform remote screen control using RDP. This is partly for convenience but can also serve the purpose of maintaining persistence. If the RDP service is not active during the attack process, threat actors may install RDP Wrappers, steal existing account
Infected Systems Controlled Through Remote Administration Tools – Detected by EDR (2)
Remote administration tools, also known as RAT, are software that provide the ability to manage and control terminals at remote locations. Recently, there has been an increase in cases where remote administration tools are installed instead of backdoor malware during the initial access or lateral movement phases to control the
BlueKeep Attack Detected by AhnLab EDR
BlueKeep (CVE-2019-0708) is a vulnerability revealed in May 2019, occurring during the Remote Desktop Protocol (RDP) connection process between a client and server. When a client sends a malicious packet through a specific channel (MS_T120), a Use-After-Free vulnerability occurs, allowing remote code execution.[1] This vulnerability has been discussed on the
BPFDoor Linux Malware Detected by AhnLab EDR
BPFDoor is a backdoor using the Berkeley Packet Filter (BPF), first revealed through a threat report by PWC in 2021 [1]. According to the report, the China-based threat actor Red Menshen has been using BPFDoor for several years in attacks targeting the Middle East and Asia regions, with its source
Linux Persistence Techniques Detected by AhnLab EDR (1)
Persistence techniques refer to methods employed by threat actors to maintain a connection to the target system after infiltration. As a single breach may not be enough to achieve all their goals, threat actors look for ways to re-access the system. Persistence can be maintained by configuring the malware to
SnakeKeylogger Malware Detected by AhnLab EDR
1. Overview SnakeKeylogger, an Infostealer created with .NET, can leak data using emails, FTP, SMTP, or Telegram. The malware has been consistently distributed and was covered in a previous ASEC Blog post. [1] This post will reveal the trace of the malicious behaviors of SnakeKeylogger analyzed in the previous post
Linux Defense Evasion Techniques Detected by AhnLab EDR (2)
The blog post “Linux Defense Evasion Techniques Detected by AhnLab EDR (1)” [1] covered methods where the threat actors and malware strains attacked Linux servers before incapacitating security services such as firewalls and security modules and then concealing the installed malware. This post will cover additional defense evasion techniques against
