BKDR_NETWIRED.BA

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.

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 creates the following folders:

• %User Profile%\Application Data\BSILlzCwXBS

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Other System Modifications

This backdoor deletes the following files:

• {malware path and file name}:zone.identifier
• %User Temp%\19906EKUl5.ini
• %User Temp%\4dneHHHHVV.ini
• %User Temp%\S5fO1BI3ga.ini
• %User Temp%\j6zIg33fCu.ini
• %User Temp%\QgIKuY6wAd.ini
• %User Temp%\mKITsLeS2h.ini
• %User Temp%\uioxMAKztx.ini
• %User Temp%\6mcT4ArkMB.ini

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Dropping Routine

This backdoor drops the following files:

• %User Profile%\BSILlzCwXBS\9664.xml
• %User Startup%\KIXtKRzH.lnk
• %User Temp%\z6AB98jnkL.ini
• %User Temp%\2arkaUnBh5.ini
• %User Temp%\46Rd3gLCmV.ini
• %User Temp%\xYnQAwnBpQ.ini
• %User Temp%\QRC0yr65eG.ini
• %User Temp%\AnQNfJ1Na2.ini
• %User Temp%\JaI01UkQit.ini
• %User Temp%\XyweORh8sU.ini

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %User Startup% is the current user's Startup folder, which is usually C:\Documents and Settings\{user}\Start Menu\Programs\Startup on Windows 2000 and XP, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows Vista, 7, and 8.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Other Details

This backdoor connects to the following possibly malicious URL:

• http://{BLOCKED}a.xyz/Obi/Obi/index.php?{random characters}
• {BLOCKED}.209.242

This report is generated via an automated analysis system.