BKDR_BIFROSE.WINP

This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It deletes the initially executed copy of itself.

Arrival Details

This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This backdoor drops a copy of itself in the following folders using different file names:

• %System%\wminanp.exe

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other System Modifications

This backdoor adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{UID}

HKEY_CURRENT_USER\Identities

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{UID}
StubPath = "%System%\wminanp.exe -a"

HKEY_CURRENT_USER\Identities
Last Name = "{hex values}"

Other Details

This backdoor connects to the following possibly malicious URL:

• a3release070108.{BLOCKED}ix.com
• wqertbbs.{BLOCKED}n.com

It deletes the initially executed copy of itself