FormBook Malware Being Distributed as .NET
AhnLab’s ani-malware software, V3, detects and responds to malware with a variety of detection features including the App Isolate Scan feature. The App Isolate Scan detects and quarantines suspicious processes. This allows quarantining malware such as Infostealer and downloader in a virtual environment for detection. Therefore, V3 can protect users
CoinMiner Being Installed on Vulnerable Apache Tomcat Web Server
The ASEC analysis team has recently identified attacks targeting vulnerable Apache Tomcat web server. The Tomcat server that has not been updated to the latest version is one of the major attack vectors that exploit vulnerabilities. In the past, the ASEC blog has also covered attacks targeting Apache Tomcat servers
Amadey Bot Disguised as a Famous Korean Messenger Program Being Distributed
On October 17th, 2022, the Korean Internet & Security Agency (KISA) published a security notice titled “Advising Caution on Cyber Attacks Exploiting the Kakao Service Malfunction Issue’, and according to the notice, malware disguised as a KakaoTalk installation file (KakaoTalkUpdate.zip etc.) is being distributed via email. KISA security notice: https://www.boho.or.kr/data/secNoticeView.do?bulletin_writing_sequence=66958
GuLoader Malware Disguised as a Word File Being Distributed in Korea
The ASEC analysis team has discovered that the GuLoader malware is being distributed to Korean corporate users. GuLoader is a downloader that has been steadily distributed since the past, downloading various malware. The phishing mail being distributed is as follows, and has an HTML file attached. When the user opens
Analysis on Attack Techniques and Cases Using RDP
Overview One of the previous ASEC blog posts discussed cases where attackers abused various remote control tools that are originally used for system management purposes to gain control over infected systems.[1] This post will cover cases where RDP (Remote Desktop Protocol), a default service provided by baseline Windows OS, was
Rapidly Evolving Magniber Ransomware
The Magniber ransomware has recently been evolving rapidly. From changing its file extension, injection and to UAC bypassing techniques, the Magniber ransomware has been rapidly changing to bypass the detection of anti-malware software. This article summarizes the evolution of the Magniber ransomware in the last few months based on the
Attackers Abusing Various Remote Control Tools
Overview Ordinarily, attackers install malware through various methods such as spear phishing emails with a malicious attachment, malvertising, vulnerabilities, and disguising the malware as normal software and uploading them to websites. The malware that is installed include infostealers which steal information from the infected system, ransomware which encrypts files to
Lazarus Group Uses the DLL Side-Loading Technique (mi.dll)
While tracking the Lazarus attack group, the ASEC analysis team discovered that the attackers were using the DLL Side-Loading attack technique (T1574.002) by abusing legitimate applications in the initial compromise stage to achieve the next stage of their attack process. https://attack.mitre.org/techniques/T1574/002/ The DLL Side-Loading attack technique saves a legitimate application
GlobeImposter Ransomware Being Distributed in Korea
The ASEC analysis team has recently identified through internal monitoring that the GlobeImposter ransomware, which targets vulnerable MS-SQL servers, is being distributed. This GlobeImposter ransomware has also been mentioned in AhnLab TIP’s quarterly statistics, specifically in the ‘2022 1st and 2nd Quarter Statistical Report on Malware Targeting MS-SQL,’ and in
Qakbot Being Distributed as ISO Files Instead of Excel Macro
There is a recent increase in the distribution method of malware through ISO files. Among the malware, it has been identified that Qakbot, an online banking malware, has had its distribution method changed from Excel 4.0 Macro to ISO files. The ASEC blog introduced cases of ISO file usage for
