W32/Kolabc-A is a worm with IRC backdoor functionality for the Windows platform.
W32/Kolabc-A runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.
When first run W32/Kolabc-A copies itself to <System>\vmware.exe and creates the file <User>\Application Data\temp\ec800ee4.tmp.
The following registry entries are created to run vmware.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
VMware Workstation
<System>\vmware.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
VMware Workstation
<System>\vmware.exe
The following registry entry is set, affecting internet security:
HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
<System>\vmware.exe
<System>\vmware.exe:*:Enabled:VMware Workstation
The following registry entry is set:
HKCU\Software\Microsoft\OLE
VMware Workstation
<System>\vmware.exe