Distribution of Malware via Resume/Copyright-Related Emails (Ransomware, Infostealer)
ASEC analysis team has confirmed the malware under the disguise of a resume is still being distributed. This time, it disguised as resume and copyright-related files. The file that is being recently distributed also takes the form of NSIS (Nullsoft Scriptable Install System) and is being distributed under various filenames
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
Caution – Emails with the Title ‘Request for Purchase Order’ being Distributed to Companies
Multiple malicious emails with the title ‘Request for Purchase Order’ are being distributed to multiple companies. These spam mail attacks, which were first distributed in the second half of last year to random companies with the purpose of stealing user account, are still being distributed. To steal a user’s company
![[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
