Backdoor.Win32.Bandok.ii

Avast detected ia virus when it arrived (I think) and I chose to delete it. However a file Oxf9.exe was recognized later Kaspersky as the virusBackdoor.Win32.Bandok.ii. Could it be the same? Panda found it also but called it Adware/picsplace; McAfee could not find it; and running Avast does not find it either. HouseCall found Adwawre_adclicker; Adware_inet; and Adaware_memwatcher and apparently cleand these.

I have run Kaspersky again and the it detectes the virus in the fil just as before.

In Avast’s Warning log I have the following:
18/10/2008 23:43:31 SYSTEM 1332 Sign of “Win32:Trojan-gen {Other}” has been found in “C:\DOCUME~1\Qimi\LOCALS~1\Temp\csrss5.dll” file.

How do I clean it manually? Can I just delete the file Oxf9.exe? Is this related to csrss5.dll which I cannot find anymore?

Meanwhile until you reply, I am going to rename the extension and move it elsewhere.

Incidentally, I turned off System Restore before I did the scans and the first Kaspersky, Panda, McAfee and HouseCall were done in Safe Mode

Help

Thank you

qim

You can clean temp files with a program like CCleaner:

http://www.ccleaner.com/

What was the name and location of the file Kaspersky detected?

c:\Oxf9.exe

:slight_smile: Hi :

When it comes to possible “Backdoor” Detections, it would be wise to read the
Info @ www.geekstogo.com/2007/10/03/what-is-a-backdoor-trojan AND
http://aumha.net/viewtopic.php?f=26&t=28580 .

Thanks. I appreciate your advice. But right now what I need is some help identifying the culprit (Oxf9.exe) and how to safely remove it.

Can you help?

For instance is Oxf9.exe related to the Warning I received from Avast: “Win32:Trojan-gen {Other}” has been found in “C:\DOCUME~1\Qimi\LOCALS~1
\Temp\csrss5.dll” file

And why did Avast not deal with it, if it is the same thing?

Thanks

Thanks. I appreciate your advice. But right now what I need is some help identifying the culprit (Oxf9.exe) and how to safely remove it.

Can you help?

c:\Oxf9.exe

Please upload the above files to VirusTotal for analysis. Post the results here.

For instance is Oxf9.exe related to the Warning I received from Avast: "Win32:Trojan-gen {Other}" has been found in "C:\DOCUME~1\Qimi\LOCALS~1 \Temp\csrss5.dll" file

And why did Avast not deal with it, if it is the same thing?

Really hard to say. Malware often has many component parts, and one AV may recognise some parts but not others, especially as malware writers constantly try to disguise their malware by creating new variants. On the other hand, it may be something entirely unrelated.

File 0xf9.exe received on 10.19.2008 22:07:30 (CET)
Current status: Loading … queued waiting scanning finished NOT FOUND STOPPED

Result:
Loading server information…
Your file is queued in position: 1.
Estimated start time is between 40 and 57 seconds.
Do not close the window until scan is complete.
The scanner that was processing your file is stopped at this moment, we are going to wait a few seconds to try to recover your result.
If you are waiting for more than five minutes you have to resend your file.
Your file is being scanned by VirusTotal in this moment,
results will be shown as they’re generated.
Compact Print results
Your file has expired or does not exists.
Service is stopped in this moments, your file is waiting to be scanned (position: ) for an undefined time.

You can wait for web response (automatic reload) or type your email in the form below and click “request” so the system sends you a notification when the scan is finished.
Email:

Antivirus Version Last Update Result
Additional information
File size: 65536 bytes
MD5…: eddea7bec9b4c671f4d20aa75ed17515
SHA1…: ae1a84bda4691b0b12fe3954c0e6f9bd5238b1c8
SHA256: 9b9249b1f549356f3222afcb35e79da49f3d457c09701adf24d8078f315c66ba
SHA512: a275abb697f3ddc811ad2eb065db36692c845dc10bdbc99031e4c9d33a7e4528
ef16e1ca627310b0f0b6ef805dae2d6ea24e0d9ca827b73079ae9df5dc80a939
PEiD…: -
TrID…: File type identification
UPX compressed Win32 Executable (39.5%)
Win32 EXE Yoda’s Crypter (34.3%)
Win32 Executable Generic (11.0%)
Win32 Dynamic Link Library (generic) (9.8%)
Generic Win/DOS Executable (2.5%)
PEInfo: PE Structure information

( base data )
entrypointaddress.: 0x6c0710
timedatestamp…: 0x48f9fb04 (Sat Oct 18 15:04:36 2008)
machinetype…: 0x14c (I386)

( 3 sections )
name viradd virsiz rawdsiz ntrpy md5
UPX0 0x1000 0x2b0000 0x0 0.00 d41d8cd98f00b204e9800998ecf8427e
UPX1 0x2b1000 0x10000 0xfa00 7.90 19dd05f472beb3aee2b3015adc9f8055
UPX2 0x2c1000 0x1000 0x200 3.86 1198f4818554e7c232be3bac33e4f159

( 6 imports )

KERNEL32.DLL: LoadLibraryA, GetProcAddress, VirtualProtect, VirtualAlloc, VirtualFree, ExitProcess
ADVAPI32.dll: RegCloseKey
SHELL32.dll: SHGetSpecialFolderPathA
USER32.dll: SendNotifyMessageA
WININET.dll: InternetOpenA
WSOCK32.dll: -

( 0 exports )

Please note that I changed the file extension more than once from .exe to .exit and back again and that I took it out of the root C:\ directory and placed in a folder on the Desktop. What you got now is the Desktop version with the .exe extension. I will go now and change it back again before it executes…

Found something

I have a csrss.exe in HK_Current User\Software\Microsoft\Windows\CurrentVersion\Run pointing to c:\Documents&Settings\AllUsers\ ApplicationData\csrss.exe

Shouldn’t e there, right? I’ve unchecked in the startup tab of MSConfig. What next?

Hello qim,

Here you can find all the instructions to manually remove this malware from your computer:
http://www.exterminate-it.com/malpedia/remove-banbot

polonus

The VirusTotal report didn’t come out right.

Ok, as for Polonus help, I did not find any of those entries in regedit or any of the files. So, I’m not sure what that means.

Now, for VirusTotal. What do you mean by it did not come out right? You mean there is a virus or the results are incomplete?

There is no listing of the 36 scanners and what they found or didn’t find, just copy and paste the URL from your browsers address window once the virus total completes its scan.

Here it goes and thank you very much for your help.

http://www.virustotal.com/analisis/2225853b7d13c3bf036f709104049140

Antivirus Version Last Update Result
AhnLab-V3 2008.10.18.0 2008.10.19 -
AntiVir 7.9.0.5 2008.10.19 TR/Downloader.Gen
Authentium 5.1.0.4 2008.10.19 -
Avast 4.8.1248.0 2008.10.15 -
AVG 8.0.0.161 2008.10.19 -
BitDefender 7.2 2008.10.19 -
CAT-QuickHeal 9.50 2008.10.18 -
ClamAV 0.93.1 2008.10.19 -
DrWeb 4.44.0.09170 2008.10.19 Trojan.Suslik
eSafe 7.0.17.0 2008.10.19 Suspicious File
eTrust-Vet 31.6.6154 2008.10.17 -
Ewido 4.0 2008.10.19 -
F-Prot 4.4.4.56 2008.10.19 -
F-Secure 8.0.14332.0 2008.10.19 Backdoor.Win32.Bandok.ii
Fortinet 3.113.0.0 2008.10.19 -
GData 19 2008.10.19 -
Ikarus T3.1.1.44.0 2008.10.19 -
K7AntiVirus 7.10.498 2008.10.18 -
Kaspersky 7.0.0.125 2008.10.20 Backdoor.Win32.Bandok.ii
McAfee 5408 2008.10.17 -
Microsoft 1.4005 2008.10.19 TrojanProxy:Win32/Dosenjo.A
NOD32 3536 2008.10.19 -
Norman 5.80.02 2008.10.17 -
Panda 9.0.0.4 2008.10.19 Suspicious file
PCTools 4.4.2.0 2008.10.20 -
Prevx1 V2 2008.10.20 -
Rising 20.66.62.00 2008.10.19 Trojan.Win32.Undef.rnb
SecureWeb-Gateway 6.7.6 2008.10.19 Trojan.Downloader.Gen
Sophos 4.34.0 2008.10.19 Mal/Emogen-G
Sunbelt 3.1.1732.1 2008.10.18 -
Symantec 10 2008.10.19 -
TheHacker 6.3.1.0.119 2008.10.18 -
TrendMicro 8.700.0.1004 2008.10.17 PAK_Generic.001
VBA32 3.12.8.7 2008.10.19 -
ViRobot 2008.10.18.1426 2008.10.18 -
VirusBuster 4.5.11.0 2008.10.19 -
Additional information
File size: 65536 bytes
MD5…: eddea7bec9b4c671f4d20aa75ed17515
SHA1…: ae1a84bda4691b0b12fe3954c0e6f9bd5238b1c8
SHA256: 9b9249b1f549356f3222afcb35e79da49f3d457c09701adf24d8078f315c66ba
SHA512: a275abb697f3ddc811ad2eb065db36692c845dc10bdbc99031e4c9d33a7e4528
ef16e1ca627310b0f0b6ef805dae2d6ea24e0d9ca827b73079ae9df5dc80a939
PEiD…: -
TrID…: File type identification
UPX compressed Win32 Executable (39.5%)
Win32 EXE Yoda’s Crypter (34.3%)
Win32 Executable Generic (11.0%)
Win32 Dynamic Link Library (generic) (9.8%)
Generic Win/DOS Executable (2.5%)
PEInfo: PE Structure information

( base data )
entrypointaddress.: 0x6c0710
timedatestamp…: 0x48f9fb04 (Sat Oct 18 15:04:36 2008)
machinetype…: 0x14c (I386)

( 3 sections )
name viradd virsiz rawdsiz ntrpy md5
UPX0 0x1000 0x2b0000 0x0 0.00 d41d8cd98f00b204e9800998ecf8427e
UPX1 0x2b1000 0x10000 0xfa00 7.90 19dd05f472beb3aee2b3015adc9f8055
UPX2 0x2c1000 0x1000 0x200 3.86 1198f4818554e7c232be3bac33e4f159

( 6 imports )

KERNEL32.DLL: LoadLibraryA, GetProcAddress, VirtualProtect, VirtualAlloc, VirtualFree, ExitProcess
ADVAPI32.dll: RegCloseKey
SHELL32.dll: SHGetSpecialFolderPathA
USER32.dll: SendNotifyMessageA
WININET.dll: InternetOpenA
WSOCK32.dll: -

( 0 exports )

packers (F-Prot): UPX
packers (Kaspersky): PE_Patch.UPX, UPX

Try a scan with DrWeb CureIT!

Try this online scan. (Disable avast! while scanning.)

F-Secure

Thanks FreewheelinFrank

I am becoming very wary of unknown programs. Before I do any mor scans could you tell me what the 6 imports signify?

(6 imports )

KERNEL32.DLL: LoadLibraryA, GetProcAddress, VirtualProtect, VirtualAlloc, VirtualFree, ExitProcess
ADVAPI32.dll: RegCloseKey
SHELL32.dll: SHGetSpecialFolderPathA
USER32.dll: SendNotifyMessageA
WININET.dll: InternetOpenA
WSOCK32.dll: -

For istance, I assume that InternetOpenA opens Internet in the Firewall of Windows. I have corrected hat. What about the others?

Thank you for your help.

The information is for people who really understand the bowels of Windows. (I don’t)

You certainly want to remove the file, and DrWeb or F-Secure online scanner will do that.

Also read the advice posted by Spiritsongs.