Now the server looks mysteriously clean thus the only clues I have are that screenshot and the vmware snapshot.

Anyone could help me to investigate more deeply ?

The following is what I have done alone:

# vol pslist|grep logon
Volatility Foundation Volatility Framework 2.3.1
0x8967d158 winlogon.exe            412    332     18      535      0      0 2013-06-26 09:16:14 UTC+0000                                
0x88ea0918 winlogon.exe           9088    332     19      258      1      0 2013-10-30 14:33:34 UTC+0000          
    
# vol dlllist -p 412|grep -i klogon
0x10000000    0x36000        0x1 C:\WINDOWS\system32\klogon.dll
klogon looks a kaspersky logon module

# vol dlldump -b 0x10000000 -D /root/dumpprocess/

and the dumped dll looks really something about kaspersky..

# vol filescan|grep VC80
Volatility Foundation Volatility Framework 2.3.1
0x08d295d8      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86
0x08e684f0      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86
0x08f0b920      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x0905a530      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86
0x090822d0      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x09175a90      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86
0x09181e50      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x09496250      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x09509cc8      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x09555808      1      0 R--r-d \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86\msvcr80.dll
0x0958f860      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86
0x095cd168      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x095f76a0      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86
0x0960b668      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x0961d9d8      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x0961e6c8      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x096cda10      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x096f1db0      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x096f2d10      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x097c52d0      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x097fbb10      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x09809e90      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x09836350      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x09843c68      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x0985aa50      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x09872738      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x0987b340      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x09a0fea8      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86
0x09a3ada8      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86
0x09a82f90      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86
0x09bf9ef8      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6195_x-ww_44262b86
0x09d95428      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952
0x09dadd18      1      1 R--rw- \Device\HarddiskVolume1\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.6229_x-ww_449d3952