Troj/JSAgent-CK

Posted: July 20, 2012

Threat Metric

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The following fields listed on the Threat Meter containing a specific value, are explained in detail below:

Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.

Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.

Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.

Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.

% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.

Threat Level:	10/10
Infected PCs:	70

First Seen:	July 20, 2012
OS(es) Affected:	Windows

Troj/JSAgent-CK is an HTM file that redirects you to a malicious site, currently noted as a host for one version of the Blackhole Exploit Kit (a configurable PC threat that allows harmful software to be installed on your computer without your consent). Troj/JSAgent-CK is readily-discernible as a file attachment that's distributed in e-mail spamming campaigns, with current formats of Troj/JSAgent-CK's e-mails using fake notifications of electronic money transferals. This mean of distribution is common to many other Trojans besides Troj/JSAgent-CK, and SpywareRemove.com malware researchers always encourage you to interact with unusual e-mail messages with a high level of wariness. Scanning files prior to downloading them can detect Troj/JSAgent-CK before Troj/JSAgent-CK has a chance to redirect your browser, and it should be noted that legitimate wire transfer companies will never ask you to open e-mail file attachments due to the inherent security risk.

Troj/JSAgent-CK: Just the Newest in Mailbox-Delivered Saboteurs

While not especially creative, Troj/JSAgent-CK's distribution tactics are reasonably effective, as noted with previous examples of e-mail-propagated PC threats like Troj/Agent-WXL, Troj/Agent-WMO, members of the BredoZp family of Trojans, Win32/Cbeplay.P, and Mal/Zbot-FV. As a widely-spammed file attachment, Troj/JSAgent-CK's presence in your e-mail inbox is disguised as a message about a 'wire transfer confirmation.' Since these messages either imply that an unwarranted transfer has taken place or that a legitimate transfer has failed, careless individuals may be persuaded to trust the accompanying file attachment, which some prominent PC security companies detect as Troj/JSAgent-CK.

After launching, Troj/JSAgent-CK will redirect your browser with a simple 'Please wait a moment. You will be forwarded' message. Of course, instead of redirecting you to a legitimate site, SpywareRemove.com malware experts have found that Troj/JSAgent-CK will take your browser to a hostile site that hosts the Black Hole Exploit Kit (also known as BEK or Blacole). BEK exploits can be configured for different payloads, although they always entail the installation of unwanted and potentially harmful software onto your computer. If you've fallen for a Troj/JSAgent-CK attack, you should consider your computer potentially compromised until you have an opportunity to scan it with anti-malware software.

Dodging Troj/JSAgent-CK's Gravity Towards a Black Hole That's Trickier to Escape

E-mails that contain Troj/JSAgent-CK can be deleted on sight as the most efficient means of protecting your PC from Troj/JSAgent-CK and its related Black Hole attacks. Exposure to Black Hole Kit attacks can, themselves, be guarded against if your browser uses strong security and you have active anti-malware applications to block browser-based attacks. SpywareRemove.com malware experts have especially taken notice of BEK's usage of JavaScript and Adobe software, which should be kept updated to lower the amount of vulnerabilities that Blacole, Troj/JSAgent-CK and related PC threats can use to their benefit.

There are no symptoms of a successful Troj/JSAgent-CK attack, but common payloads for Blacole include banking Trojans, keyloggers, browser hijacks and rogue security programs among their possibilities.

Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:

Wire_AMBA01-Rejected.htm

File name: Wire_AMBA01-Rejected.htm
Mime Type: unknown/htm
Group: Malware file