Trojan.Win32.DOWNLOADER.CD

This Trojan 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 Trojan 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 Trojan adds the following processes:

• {malware filepath}\{malware filename}.exe
• %User Temp%\7za.dll" x "%User Temp%\~FavPrrpvd.ex_" -o"%Favorites%\Links" -r -y
• %User Temp%\7za.dll" x "%User Temp%\~FavPrrpvd.ex_" -o"%Favorites%\链接" -r -y
• WMIC BIOS get Manufacturer

(Note: %Favorites% is the current user's Favorites folder, which is usually C:\Documents and Settings\{user name}\Favorites on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Favorites on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
MenuOrder\Favorites\链接
Order = {hex values}

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\TabbedBrowsing
NewTabPageShow = 1

Dropping Routine

This Trojan drops the following files:

• %User Temp%\~FavPrrpvd.ex_
• %Favorites%\Links\电脑店官网.url
• %Favorites%\Links\游戏娱乐.url
• %Favorites%\Links\黄历网.url
• %Favorites%\Links\热点新闻.url
• %Favorites%\Links\淘宝网.url
• %Favorites%\Links\京东购物.url
• %Favorites%\Links\百度搜索.url
• %Favorites%\Links\网址导航.url
• %Favorites%\Links\天猫购物.url
• %Favorites%\链接\电脑店官网.url
• %Favorites%\链接\游戏娱乐.url
• %Favorites%\链接\黄历网.url
• %Favorites%\链接\热点新闻.url
• %Favorites%\链接\淘宝网.url
• %Favorites%\链接\京东购物.url
• %Favorites%\链接\百度搜索.url
• %Favorites%\链接\网址导航.url
• %User Temp%\7za.dll
• %User Temp%\360Safe.dll

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Favorites% is the current user's Favorites folder, which is usually C:\Documents and Settings\{user name}\Favorites on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Favorites on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other Details

This Trojan connects to the following possibly malicious URL:

• http://tj.{BLOCKED}.com/api/soft2_token.php?softid=136&hash=f42723a5c33aaee08d43c682d7ea70da

It does the following:

• It deletes itself after execution.