TROJ_REDOSD.SMQ

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 copies of itself into the affected system:

• %System Root%\{random}

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

It drops the following file(s)/component(s):

• %Application Data%\Systems\ACDSee\Igebo.ddf%SESSIONNAME%\fupmj.cc3
• %System%\{random}.rdb

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

It creates the following folders:

• %Application Data%\Systems
• %Application Data%\Systems\ACDSee
• %Application Data%\Systems\ACDSee\Igebo.ddf%SESSIONNAME%

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

Autostart Technique

This Trojan registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Comhidserv70
ImagePath = "%System%\svchost.exe -k netsvcs"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Comhidserv70\Parameters
serviceDlL = "%Application Data%\Systems\ACDSee\Igebo.ddf%SESSIONNAME%\fupmj.cc3"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Enum\Root\LEGACY_HIDSERV\
0000
Service = "HidServ"

Other System Modifications

This Trojan adds the following registry keys as part of its installation routine:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Comhidserv70

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Enum\Root\LEGACY_HIDSERV

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\HidServ