Troj/Agent-GYO includes functionality to access the internet and communicate with a remote server via HTTP.
When first run Troj/Agent-GYO copies itself to <System>\cftmon.exe and creates the following files:
<System>\mshdtxt32.dat
<System>\mshyta16.dll
The files mshyta16.dll and gbf1.tmp are detected as Troj/KeyLog-KB.
The following registry entry is created to run cftmon.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
cftmon
<System>\cftmon.exe
The following registry entries are created to run code exported by mshyta16.dll on startup:
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\__A
DllName
<System>\mshyta16.dll
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\__A
Startup
fnGbf2
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\__A
Impersonate
0