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
Change in Magniber Ransomware (*.js → *.wsf) – September 28th
The ASEC analysis team has explained through the blog post on September 8th that the Magniber ransomware has changed from having a CPL extension to a JSE extension. Change in Magniber Ransomware (*.cpl → *.jse) – September 8th The attacker made another change after September 8th, changing the file extension
LockBit 3.0 Ransomware Distributed via Word Documents
The ASEC analysis team has identified that LockBit 3.0 ransomware distributed while disguised as job application emails in NSIS format is also being distributed in Word document format. The specific distribution channel has not yet been identified, but considering that the distributed file names include names of people such as
Analysis Report on Lazarus Group’s Rootkit Attack Using BYOVD
Since 2009, Lazarus Group, known to be a group of hackers in North Korea, has been attacking not only Korea but various countries of America, Asia, and Europe. According to AhnLab’s ASD (AhnLab Smart Defense) infrastructure, in early 2022, the Lazarus Group performed APT (Advanced Persistent Threat) attacks on Korea’s
NSIS Type of LockBit 3.0 Ransomware Disguised as Job Application Emails Being Distributed
In February and June, the ASEC Analysis team posted in the blog about LockBit 2.0 ransomware being distributed via email. In this blog, we will introduce the new version of the LockBit 3.0 ransomware that is still being distributed through similar method. While in June there were multiple cases of the
