TROJ_OBVOD.FKZ
TrojanDownloader:Win32/Obvod.H [Microsoft];
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
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.
It uses Windows Task Scheduler to create a scheduled task that executes the dropped copy.
TECHNICAL DETAILS
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%\Documents and Settings\All Users\Application Data\{random}.exe
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It drops the following files:
- %System Root%\Documents and Settings\All Users\Application Data\{random}.exe.b
- %System Root%\Documents and Settings\All Users\Application Data\{random}.exe_.b
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It uses Windows Task Scheduler to create a scheduled task that executes the dropped copy.
Other System Modifications
This Trojan adds the following registry entries as part of its installation routine:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
DisableScriptDebuggerIE = "yes"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Error Dlg Displayed On Every Error = "no"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ScheduleHKEY_LOCAL_MACHINE\SYSTEM\
CurrentControlSet\Services\Schedule
AtTaskMaxHours = "48"