Home Malware Programs Backdoors Backdoor.Baccamun

Backdoor.Baccamun

Posted: July 28, 2014

Threat Metric

Threat Level: 8/10
Infected PCs: 342
First Seen: July 28, 2014
Last Seen: June 28, 2023
OS(es) Affected: Windows


Backdoor.Baccamun is a backdoor Trojan that creates a connection with a remote server, which may allow third parties to collect information, disable your PC's security or even control its input. Although, most recently, Backdoor.Baccamun conducted targeted attacks against South Korean entities, its functions also are applicable to PCs in other regions, and malware experts have found limited symptoms associated with this Trojan. Immediately removing Backdoor.Baccamun through preventative security measures and anti-malware tools continues to be the optimal response, as with all similar high-level threats.

A New Trojan by Mail that You may Overlook

At a minuscule nineteen KB, Backdoor.Baccamun has an easily-ignored file size and uses components that are mislabeled to disguise Backdoor.Baccamun as part of the Windows Task Manager. However, malware analysts found that this small package encompass all of the primary functions of a backdoor Trojan, enabling Backdoor.Baccamun to compromise a system's security and lead to further attacks with minimal restrictions. The most noteworthy of Backdoor.Baccamun's attack functions may include:

  • Being able to download other files, such as additional threats, which Backdoor.Baccamun may install.
  • Contacting a remote server to allow third parties to issue instructions for modifying the infected PC or transferring stolen information. This backdoor connection uses an anonymity-enabling DNS technique that may very well hinder authorities' attempts to identify the persons behind Backdoor.Baccamun's campaign.
  • Backdoor.Baccamun also may control other programs on your computer by terminating their processes automatically (for example, by forcing your firewall or anti-virus scanner to close).

Backdoor.Baccamun was first seen relatively recently in targeted attacks against South Korean institutions. As often is the case for such attacks, the distribution mode of choice is e-mail attachments. These RTF files included unsafe content enabling Backdoor.Baccamun to be installed automatically through the CVE-2012-0158 exploit, a vulnerability that also may function through Microsoft Word documents – or even website HTML content.

How to Avoid Being a Baka About Backdoor.Baccamun

Backdoor.Baccamun's creators have gone to substantial efforts to ensure that security researchers have difficulty identifying them, with Backdoor.Baccamun even utilizing a code mapping technique to make their nationalities unclear (although eastern Asian nations remain the likely places of origin). In spite of these additional efforts, Backdoor.Baccamun continues to use the standard e-mail hoaxes that threat authors find preferable for targeting companies and governments, and a competent anti-malware file scanner should be able to detect the unsafe content in Backdoor.Baccamun's RTF attachment. Updated software also can reduce the vulnerabilities like CVE-2012-0158 and similar attacks, which may distribute more than just Backdoor.Baccamun.

So far, Backdoor.Baccamun's campaign is limited to Korea, and, for now, Backdoor.Baccamun isn't seen in non-targeted attacks that would distribute Backdoor.Baccamun indiscriminately. Regardless, Backdoor.Baccamun's efficient coding and packaging make it clear that threat authors are getting no worse at hiding high-level threats in small, easily-ignored files. As always, malware researchers urge you to mind your own online behavior for possible risks, and use anti-malware protection when personal prevention is inadequate or impractical.

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:



%Windir%\Tasks\taskmgr.exe File name: %Windir%\Tasks\taskmgr.exe
Mime Type: unknown/exe
Group: Malware file

Registry Modifications

The following newly produced Registry Values are:

HKEY..\..\{Value}HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"Java Run Environment 1.1.0023\" = "%Windir%\tasks\taskmgr.exe"

Additional Information

The following URL's were detected:
www.telecom.ntdll.net
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