Summary
This program installs various files onto the system. Among the components installed are: a backdoor which connects to an external site to optain updates and other settings; and a component that monitors web traffic to various search engines in China and the domains of certain antivirus (AV) vendors.
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
The malware is detected as Trojan-Dropper:W32/Bohu.A and is a NullSoft installer that contains the following:
- uuse-5905.exe
- %ProgramFiles%\baidu\dsop7.xml
- %ProgramFiles%\baidu\msfsg.exe
Besides installing the files, it also modify the system's IP settings to use DHCP.
UUSE-5905.EXE
This file is an installer of a media player application. This is a decoy installed by the malware to make users think they have installed a valid application.
MSFSG.EXE
This file is some sort of utility that is being used by the malware for its different routines.
This utility is able to do the following:
- append garbage data to the end of a file
- modify DNS settings
- compress and uncompress samples
This utility is detected as Trojan.Generic.4982818.
DSOP7.XML
This file is the compressed form of another Nullsoft installer which contains the malicious components of the malware. The installer (setup321046.exe) is extracted by the malware using the msfsg.exe utility.
SETUP321046.EXE contains the following:
- %ProgramFiles%\baidu\dsetup.exe
- %ProgramFiles%\baidu\mpflt.inf
- %ProgramFiles%\baidu\mpflt_m.inf
- %ProgramFiles%\baidu\msfsg.exe
- %ProgramFiles%\baidu\newnetgar.dll
- %ProgramFiles%\baidu\siglow.dll
- %ProgramFiles%\baidu\siglow.sys
- %ProgramFiles%\baidu\spass.dll
- %ProgramFiles%\baidu\SyssData.bin
After extracting the files, SETUP321046.EXE will use msfsg.exe to append garbage data to the following files:
- %ProgramFiles%\baidu\dsetup.exe
- %ProgramFiles%\baidu\newnetgar.dll
- %ProgramFiles%\baidu\siglow.dll
- %ProgramFiles%\baidu\siglow.sys
- %ProgramFiles%\baidu\spass.dll
Then it copies the following files:
- newnetgar.dll -> %System%\nethome32.dll
- spass.dll -> %System%\netplayone\netplayone.dll
SETUP321046.EXE will create the following registry entries/service:
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\speednet_sph PathName = %System%\netplayone\netplayone.dll
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NetHomeIDE
SETUP321046.EXE will then launch DSETUP.EXE to install the following NDIS driver and notify object:
- siglow.sys -> %System%\drivers\siglow.sys
- siglow.dll -> %System%\drivers\siglow.dll
SETUP321046.EXE also attempts to change the DNS settings to 61.158.160.197 and 61.158.160.206 using the msfsg.exe utility.
NEWNETGAR.DLL / NETHOME32.DLL
This component contains routines that connects to http://[...].gogle.cn/ to obtain updates and other settings. It is detected as Backdoor:W32/Bohu.A.
SPASS.DLL / NETPLAYONE.DLL
This component monitors network traffic related to the following AV-related processes:
- safeboxtray.exe
- 360safebox.exe
- 360rp.exe
- 360safe.exe
- 360sd.exe
- dsmain.exe
- superkiller.exe
It modifies traffic made by these processes to the following addresses:
- qup.f.360.cn/file_health_info.php
- up.f.360.cn/upload.php
These addresses are related to AV cloud services. By doing this, the malware may disable cloud-based protection of the affected product.
This component also modifies traffic to several addresses related to the following domains:
- google.cn
- baidu.com
- sogou.com
It connects to the following for the settings:
- http://[...].l0086.com.cn/Service.asmx
- http://[...].02l.cn/Service.asmx
This component is detected as Trojan:W32/Bohu.A.
SIGLOW.SYS / SIGLOW.DLL
These components are responsible for dropping network traffic to the following AV related sites:
- rsup10.rising.com.cn
- rsdownauto.rising.com.cn
- cloudinfo.rising.com.cn
- cu005.www.duba.net
- cu010.www.duba.net
- cu.www.duba.net
- f-sq.ijinshan.com
- geo.kaspersky.com
- stat.ijinshan.com
- qup.f.360.cn
- h.qup.f.360.cn
- up.f.360.cn
- down.360safe.com
- dl.360safe.com
- sdup.360.cn
These components are also detected as Trojan:W32/Bohu.A.
Protect your devices from malware with F‑Secure Total
Protecting your devices from malicious software is essential for maintaining online security. F‑Secure Total makes this easy, helping you to secure your devices in a brilliantly simple way.
Award‑winning antivirus and malware protection
Online browsing, banking, and shopping protection
24/7 online identity and data breach monitoring
Unlimited VPN service to safeguard your privacy
Password manager with private data protection
Choose how many devices you want to protect to get started.
Free customer support
Cancel anytime
The trial does not obligate you to buy the product
After 30 days your subscription will renew automatically for one year at €69.99.
)
)
More Support
Community
Ask questions in our Community.
User guides
Check the user guide for instructions.
Contact Support
Chat with with or call an agent.
Submit a Sample
Submit a file or URL for analysis.