Another malvertising campaign has been detected, redirecting users to the HanJuan exploit kit (EK) also known as Timba Trojan and Fobber. An advertising service – Ad.fly has been compromised and exploited to link users to a piece of malicious software designed to harvest login details. The attack itself may be considered a man-in-the-middle one since the user’s browser is disposed to seize various credentials. Ad.fly is a URL shortener that displays an ad before the user reaches the final content via the shortened link.
URL shortening services are often employed by cyber criminals to masquerade malicious links. However, the present malvertising campaign is designed to exploit not the short link but an embedded advertisement within the Ad.fly service. Hence, the malicious advertising happens and the user is redirected to the exploit kit.
The HanJuan EK Malvertising Campaign Description
As just mentioned, the attack begins with the exploitation of the Ad.fly service. Basically, the shortener uses interstitial advertising. Interstitials are web pages that are shown to the user before or after he reaches the desired content. Usually, interstitials are controlled by an ad server.
Login Details Theft
As with most malicious campaigns of the scale, the final goal is the stealing of sensitive information.
Another version of the Tinba Trojan
According to the Dutch security company Fox-IT, the threat is yet another variant of the Tinba banking Trojan also known as Tiny Banker and Trojan.Tinba.B. Tinba was detected by Symantec back in September 2014. Its threat level was considered low, its primary purpose being the theft of banking credentials.
Another malicious campaign associated with HanJuan EK was detected in March this year. Any user who had visited the New York Daily website, Metacafe and several other less popular ones, could have been compromised by a malvertising campaign redirecting to the HanJuan EK. An Adobe Flash Player vulnerability was similarly exploited.
HanJuan Exploit Kit Detection and Removal
To stay protected against exploit kits, users can follow some security tips such as:
- Frequently update Java, Adobe products, and Flash.
- Turn off Java and Flash when not needed.
- Implement a routine patching program.
- Sustain a powerful anti-malware solution.
The following security tip goes to business owners:
- Eliminate or restrict admin-level rights for non-expert employees.
To make sure the computer hasn’t been affected by the HanJuan EK, performing a full system scan is recommended. Several removal steps that apply to information stealing Trojans are also provided.
Spy Hunter scanner will only detect the threat. If you want the threat to be automatically removed, you need to purchase the full version of the anti-malware tool.Find Out More About SpyHunter Anti-Malware Tool / How to Uninstall SpyHunter