Trojan.Win32.CONVAGENT.0NA103AQ24

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 drops the following files:

• %Favorites%\{Random Character}.url
• %User Temp%\Temp\{Random Character}.tmp
• %User Temp%\{Random Character}TMP\{Random Character}.tmp
• %Favorites%\淘宝购物\icon.ico
• %Favorites%\驴家旅游\icon.ico
• %Favorites%\淘宝购物\Desktop.ini
• %Favorites%\驴家旅游\Desktop.ini
• %User Temp%\{Random Character}.tmp → Deleted afterward
• %User Temp%\fbinst.dll → Deleted afterward

(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).. %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).)

It adds the following processes:

• %AppDataLocal%\{Random Character}TMP\Fav~Url.tmp -y -o"%Favorites%"
• %System%\cmd.exe /c %User Temp%\fbinst.dll "%System%\uqdOnce\SUPPORT.IM_" output IMG/* %~nx
• %System%\cmd.exe /c ping 127.0.0.1 -n 50® add "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /d "http://www.{BLOCKED}0.com/?3" /f
• %System%\cmd.exe /c ping 127.0.0.1 -n 3&del /q "{Malware File Path}"
• reg add "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /d "http://www..{BLOCKED}0.com/?3" /f

Autostart Technique

This Trojan modifies the following registry entries to ensure it automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
ctfmon.exe = %System%\ctfmon.exe

Other System Modifications

This Trojan adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Apache
DependOnService = Tcpip, Afd

HKLM\SYSTEM\ControlSet001\
services\Apache
Description = Apache/2.2.19 (Win32) PHP/5.2.9-1

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Apache
DisplayName = Apache

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Apache
ErrorControl = 1

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Apache
ImagePath = "%Windows%\Apache\bin\httpd.exe" -k runservice

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Apache
ObjectName = LocalSystem

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Apache
Start = 2

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Apache
Type = 16

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Apache\Parameters
ConfigArgs = -f, %Windows%\Apache\conf\httpd.conf, -d, %Windows%\Apache\.

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Apache\Security
Security = {Hex values}

Other Details

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\360safe

HKEY_CURRENT_USER\Software\360safe\
360se

HKEY_CURRENT_USER\Software\360

HKEY_CURRENT_USER\Software\360\
360se3

HKEY_CURRENT_USER\Software\360\
360se5

HKEY_CURRENT_USER\Software\360\
360se5\default

HKEY_CURRENT_USER\Software\360\
360se5\default\LastUrls

HKEY_CURRENT_USER\Software\360\
360se5\default\option

HKEY_CURRENT_USER\Software\360chrome

HKEY_CURRENT_USER\Software\360chrome\
Homepage

HKEY_CURRENT_USER\Software\360chrome\
Homepage\Default

HKEY_CURRENT_USER\Software\360\
360se6

HKEY_CURRENT_USER\Software\360\
360se6\Chrome

HKEY_CURRENT_USER\Software\360\
360se5\default\Wnd

HKEY_CURRENT_USER\Software\360\
360se5\default\Search

HKEY_CURRENT_USER\Software\360\
360se5\default\main

HKEY_CURRENT_USER\Software\PPStream

HKEY_CURRENT_USER\Software\PPStream\
main

HKEY_CURRENT_USER\Software\Baidu

HKEY_CURRENT_USER\Software\Baidu\
BaiduBrowser

HKEY_CURRENT_USER\Software\Baidu\
BaiduBrowser\updateinfo

HKEY_LOCAL_MACHINE\SOFTWARE\360SD

HKEY_LOCAL_MACHINE\SOFTWARE\360Safe

HKEY_LOCAL_MACHINE\SOFTWARE\360Safe\
Coop

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Synacast

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Apache

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Apache\Parameters

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Apache\Security

It does the following:

• Deletes itself after execution.