Received Estimate/Purchase Order Email? Take Caution When Opening Them!
With the start of 2021, malicious emails disguised as business emails are being discovered as numerous companies have started their business. Thus, users must remain vigilant when opening email. The discovered attacks used e-mails disguised as business-related content, such as ‘estimate request’ or ‘purchase orders,’ with malicious files attached. Upon
Distribution of Malware Disguised as ‘2021 Ministry of National Defense Work Report Revised’
On January 24, ASEC discovered the distribution of malware disguised as ‘2021 Ministry of National Defense Work Report Revised.’ As shown below, the extension of the distributed malware is *.pif, but it is an executable file just like the EXE extension. Once run, a file that is identical to that
BlueCrab Ransomware Installing Hacking Tool CobaltStrike in Corporate Environments
The ASEC analysis team confirmed that during the BlueCrab ransomware (=Sodinokibi, REvil) infection process, which is distributed in JS form, the CobaltStrike hacking tool was distributed under certain conditions. CobaltStrike hacking tool is a limited tool used for mock hacking test purposes under legitimate purposes; however, it has been actively
BlueCrab Ransomware’s Continuous Attempts to Bypass Detection
BlueCrab Ransomware (=Sodinokibi Ransomware) is a ransomware that is being vigorously distributed to Korean users. It distributes through a fake forum web page created using various search keywords. The infection process begins at the moment when a user runs the JS file downloaded from the distribution page. The distribution page
![[Threat Analysis] CLOP Ransomware that Attacked Korean Distribution Giant](https://asec.ahnlab.com/wp-content/uploads/2021/01/15_cyber-threat_01.png)
[Threat Analysis] CLOP Ransomware that Attacked Korean Distribution Giant
In November last year, there was a case that shocked not only the security industry, but also all of the Korean industries. The system of E-Land Group, the distribution giant, was infected by the ‘CLOP Ransomware.’ According to the press report that quoted an associate of the company, over half
Malware Distributed via Discord along with Illegal Pornography
The ASEC analysis team recently discovered batches of RAT (Remote Administration Tool) malware that is being distributed via Discord messenger. Currently, a downloader malware that downloads these batches of malware is being distributed under the name ‘porn URL.exe’ and when this malware is run, it downloads various RAT malwares externally
Magniber Ransomware Changed Vulnerability (CVE-2019-1367 -> CVE-2020-0968) and Attempted to Bypass Behavior Detection
At the beginning of this year, ASEC analysis team published the change of vulnerability which is used by the developer of Magniber to distribute the ransomware. Since September 23, 2019, CVE-2019-1367 vulnerability, which the developer of Magniber used for distribution, stopped operating in the systems with emergency security patch (Version
PHP WebShell Malware using Image Files
WebShell is a file that is uploaded to a web server which runs file navigation or system shell commands. The attacker can use the web browser to navigate through the files of the server system and issue shell commands. Certain file extensions for uploaded files can be restricted to prevent
Remcos RAT Malware being Distributed as Spam Mail
Remcos is a RAT (Remote Access Trojan) malware that has been distributed through spam mail for the past few years. Remcos is being sold by its developer using the website below, describing it as a RAT tool for remote management, it has been updated regularly until recent days. According to
Infostealer Malware Azorult Being Distributed Through Spam Mails
The ASEC analysis team recently discovered that Azorult malware is being distributed through spam mails. Azorult is a kind of Infostealer that accesses a C&C server to receive DLL files and commands used to leak information, and steals information such as user data files and account information to leak it
