How Infostealer Threat Actors Make a Profit
Infostealer is a type of information-stealing malware with the goal of stealing user credentials such as the user account information, cryptocurrency wallet address, and files that are saved in programs such as web browsers and email clients. According to the ASEC report for Q3 2022, Infostealers make up more than
Phishing PDF Files with CAPTCHA Screen Being Mass-distributed
Phishing PDF files that have CAPTCHA screens are rapidly being mass-distributed this year. A CAPTCHA screen appears upon running the PDF file, but it is not an invalid CAPTCHA. It is simply an image with a link that redirects to a malicious URL. Related types that have been collected by
NanoCore RAT Disguised as Notification of Foreign Currency Remittance Being Spread!
The ASEC analysis team recently discovered that the NanoCore remote access Trojan (RAT) disguised as notification of foreign currency remittance was distributed. Because the malware is usually spread through phishing mails, users need to take extra caution. The mail impersonates a capital company and is distributed with the title “[**
Malware Disguised as Job Offer Letter
The ASEC analysis team has recently discovered that KPOT Infostealer is being distributed via spam mails containing word files. There has been a number of cases ultimately downloading Infostealer programs when the macro was enabled, but this case is noticeable in that it used a word file with a particular
Fileless Remcos RAT Malware Delivery
The ASEC analysis team identified that Remcos RAT malware is being distributed through malicious macros in Excel files. As for the malware, the team introduced it in detail in the post linked below this text. While the method of coming into the system through spam mails is the same as
Attack Against Ukrainian Ministry of Defense Using E-mail Disguised as Free Bitcoin Reward
ASEC analysis team has confirmed the distribution of malicious e-mail disguised as a free Bitcoin reward that targets specific individuals in Ukrainian Ministry of Defense. This malware uses a recent hot topic, Bitcoin, and tricks people into downloading the end-stage malware through various methods. Figure 1. Phishing e-mail targeting Ukrainian
Distribution of RTF Vulnerability Malware that Takes Advantage of Microsoft Office Word’s External Connection
Distribution of RTF vulnerability (CVE-2017-11882) malware that uses external connection of MS Office Word document has been found. Employees must be on the lookout as the attacker is using spam e-mails to distribute malware to domestic shopping malls and other businesses. Recently, the distribution of MS Office Word malware using
Distribution of Malicious Word Document Disguised as a Military Security Monthly Magazine (April 2021)
On March 29th, ASEC analysis team has introduced malicious word documents containing North Korea related materials. Upon opening the file, it connects to the ‘External URL’ written within XML and downloads additional files. Recently the team has found out that malicious word documents using the mentioned method and disguised as
Analysis of Dridex Malware Distribution Method Armed with Bypass Detection
Dridex, also known as Cridex and Bugat, is a typical info-stealing malware that steals financial information. It is distributed on a massive scale by cybercrime organizations and it mainly uses macros within Microsoft Office Word or Excel document files that are included in spam mails. The most noticeable characteristic of
Malicious Word Documents with External Link of North Korea Related Materials
In the previous, ASEC analysis team has introduced various types of document-based malware. Among them, malicious documents of North Korea related materials were generally produced in HWP file format. You can check the relevant information from previous ASEC blog posts. Today, DOC (Word) documents containing North Korea related materials collected
