Virus:W32/Alman.A
Summary
Virus:W32/Alman.A infects all executable files in the system. The virus propagates over a network. It also has rootkit capabilities and is capable of contacting a remote server to forward information about the infected system.
Removal
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
- Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
- Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
- Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Technical Details
A later variant of this virus, Virus:W32/Alman.B, is also in the wild.
Variants of this family may be detected by the Generic Detection, Virus:W32/Alman.gen!A.
Infection
Alman.A infects all .EXE files in the affected system. It appends its code to the target file and sets this as an additional code section. It searches for files to infect in all fixed, shared, and removable drives.
It skips infecting files located in the following directories:
- Local Settings\Temp
- Windows
- WinNT
It also skips infecting files matching the following names:
- ó»°Î÷ÓÎ.exe
- asktao.exe
- au_unins_web.exe
- audition.exe
- autoupdate.exe
- ca.exe
- cabal.exe
- cabalmain.exe
- cabalmain9x.exe
- config.exe
- dbfsupdate.exe
- dk2.exe
- dragonraja.exe
- flyff.exe
- game.exe
- gc.exe
- hs.exe
- kartrider.exe
- main.exe
- maplestory.exe
- meteor.exe
- mhclient-connect.exe
- mjonline.exe
- mts.exe
- nbt-dragonraja2006.exe
- neuz.exe
- nmcosrv.exe
- nmservice.exe
- nsstarter.exe
- patcher.exe
- patchupdate.exe
- sealspeed.exe
- trojankiller.exe
- userpic.exe
- wb-service.exe
- woool.exe
- wooolcfg.exe
- xlqy2.exe
- xy2.exe
- xy2player.exe
- zfs.exe
- zhengtu.exe
- ztconfig.exe
- zuonline.exe
Execution
Upon execution, this network-propagating virus drops the following files:
- [Windows Directory]\linkinfo.dll - infector component
- [Windows System Directory]\drivers\DKIS6.sys - rootkit component
- [Windows System Directory]\drivers\RioDrvs.sys - rootkit component
The dropped file RioDrvs.sys is registered as a service.The file linkinfo.dll is injected into explorer.exe and is hidden by the rootkit components.
This virus terminates processes with names that match the following strings:
- c0nime.exe
- cmdbcs.exe
- ctmontv.exe
- explorer.exe
- fuckjacks.exe
- iexpl0re.exe
- iexplore.exe
- internat.exe
- logo_1.exe
- logo1_.exe
- lsass.exe
- lying.exe
- msdccrt.exe
- msvce32.exe
- ncscv32.exe
- nvscv32.exe
- realschd.exe
- rpcs.exe
- run1132.exe
- rundl132.exe
- smss.exe
- spo0lsv.exe
- spoclsv.exe
- ssopure.exe
- svch0st.exe
- svhost32.exe
- sxs.exe
- sysbmw.exe
- sysload3.exe
- tempicon.exe
- upxdnd.exe
- wdfmgr32.exe
- wsvbs.exe
However, the path of the files associated with the above mentioned processes should not contain the following strings:
- \com\
- \program files\
- \system\
- \windows\
- \winnt\
Once the process is terminated, the corresponding file is also deleted.
Propagation
The virus accesses network shares using the Administrator account name and one of the following passwords:
- !@#$
- !@#$%
- !@#$%^
- !@#$%^&
- !@#$%^&*
- !@#$%^&*(
- !@#$%^&*()
- 1
- 111
- 123
- 1234
- 12345
- 123456
- 654321
- admin
- asdf
- asdfgh
- qaz
- qazwsx
- qwer
- zxcv
Once connected, it drops a copy of itself as C$\Ins.exe. The dropped file is executed as a service with the service name DLAN.
This virus will attempt to connect to the following site to update itself or send data regarding the infected system:
- http://tj.imrw0rldwide.com/[...].asp
Process Changes
Creates these mutexes:
- __DL5EX__
- __DL_CORE_MUTEX__
- ACPI#PNP0D0D#1#Amd_DL5
Registry Modifications
Creates these keys:
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RioDrvs DisplayName = "RioDrvs Usb Driver" ImagePath = "system32\Drivers\RioDrvs.sys"
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