Attack Cases Against HTTP File Server (HFS) (CVE-2024-23692)
HTTP File Server (HFS) is a program that provides a simple type of web service. Because it can provide web services with just an executable file without having to build a web server, it is often used for sharing files, allowing users to connect to the address through web browsers
Keylogger Installed Using MS Office Equation Editor Vulnerability (Kimsuky)
AhnLab SEcurity intelligence Center (ASEC) has identified the details of the Kimsuky threat group recently exploiting a vulnerability (CVE-2017-11882) in the equation editor included in MS Office (EQNEDT32.EXE) to distribute a keylogger. The threat actor distributed the keylogger by exploiting the vulnerability to run a page with an embedded malicious
Microsoft Windows Security Update Advisory (CVE-2024-21338)
Overview On February 13th, 2024, Microsoft announced a Windows Kernel Elevation of Privilege Vulnerability CVE-2024-21338 patch. The vulnerability occurs at certain IOCTL of “appid.sys” known as AppLocker‘s driver, one of the Windows feature. The threat actor can read and write on a random kernel memory by exploiting the vulnerability, and
Mimo CoinMiner and Mimus Ransomware Installed via Vulnerability Attacks
AhnLab SEcurity intelligence Center (ASEC) recently observed circumstances of a CoinMiner threat actor called Mimo exploiting various vulnerabilities to install malware. Mimo, also dubbed Hezb, was first found when they installed CoinMiners through a Log4Shell vulnerability exploitation in March 2022. Up until now, all of the attack cases involved the
Apache ActiveMQ Vulnerability (CVE-2023-46604) Continuously Being Exploited in Attacks
In November 2023, AhnLab Security Emergency response Center (ASEC) published a blog post titled “Circumstances of the Andariel Group Exploiting an Apache ActiveMQ Vulnerability (CVE-2023-46604)” [1] which covered cases of the Andariel threat group exploiting the CVE-2023-46604 vulnerability to install malware. This post not only covered attack cases of the
Circumstances of the Andariel Group Exploiting an Apache ActiveMQ Vulnerability (CVE-2023-46604)
While monitoring recent attacks by the Andariel threat group, AhnLab Security Emergency response Center (ASEC) has discovered the attack case in which the group is assumed to be exploiting Apache ActiveMQ remote code execution vulnerability (CVE-2023-46604) to install malware. The Andariel threat group usually targets South Korean companies and institutions,
Warning Against Cisco IOS XE Software Web UI Vulnerabilities (CVE-2023-20198, CVE-2023-20273)
Overview This month, Cisco released a security advisory regarding two vulnerabilities currently being actively exploited in actual attacks: CVE-2023-20198 and CVE-2023-20273. These vulnerabilities are present in the web UI feature of Cisco IOS XE Software. The CVE-2023-20198 vulnerability allows an unauthorized threat actor to create an arbitrary account with level
Lazarus Threat Group Exploiting Vulnerability of Korean Finance Security Solution
As covered before here on the ASEC Blog, the Lazarus threat group exploits the vulnerabilities of INISAFE CrossWeb EX and MagicLine4NX in their attacks. New Malware of Lazarus Threat Actor Group Exploiting INITECH Process (Apr 26, 2022) A Case of Malware Infection by the Lazarus Attack Group Disabling Anti-Malware Programs
8220 Gang Uses Log4Shell Vulnerability to Install CoinMiner
Ahnlab Security Emergency response Center (ASEC) has recently confirmed that the 8220 Gang attack group is using the Log4Shell vulnerability to install CoinMiner in VMware Horizon servers. Among the systems targeted for the attack, there were Korean energy-related companies with unpatched and vulnerable systems, hence being preyed upon by multiple
Caution When Using 3CX DesktopApp (CVE-2023-29059)
Overview Details about how supply chains were attacked through the 3CX DesktopApp were published. [1] This software provides users with various communication functions, such as voice calls and video conferences, and can be operated on both Windows and MAC operating systems. Currently, the 3CX company is preparing to issue a new
