Summary
Agent.BAO, a variant of Agent, is a Trojan. Agent.BAO downloads different trojans and backdoors and activate them on an affected system without user's approval.
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
Agent.BAO is a trojan downloader. It connects to a specified site on the Internet and gets more malicious download links.
Upon execution, it drops a copy of itself from the following location:
- %sysdir%\SVCH0ST.exe
It also creates a service with the following service name:
- 000Kendy Demo Service
It adds the following service registry entry:
- [HKLM\System\CurrentControlSet\Services\000Kendy Service]ImagePath=%sysdir%\svch0st.exe
It downloads a text file from the following site:
- https://kkpic.net/ggg/adc/[REMOVED].txt
This text file contains download links of other malware.
Below is the list of some of the download sites gathered and the corresponding detection name of the downloaded files:
- http://222.220.16.185/data6/j[REMOVED].exe - Packed.Win32.NSAnti.b
- https://222.220.16.185/data6/w[REMOVED].exe - Trojan-PSW.Win32.Lmir.bdb
- https://222.220.16.185/data6/m[REMOVED].exe - Trojan-Downloader.Win32.Small.bxa
- https://222.220.16.185/data6/w[REMOVED].exe - Trojan-PSW.Win32.Agent.im
- https://222.220.16.185/data6/m[REMOVED].exe - Trojan-PSW.Win32.Delf.fz
- https://222.220.16.185/data6/j[REMOVED].exe - Backdoor.Win32.Agent.aex
- https://222.220.16.185/data6/w[REMOVED].exe - Backdoor.Win32.Agent.aex
- https://222.220.16.185/data6/z[REMOVED].exe - Trojan-PSW.Win32.WOW.qm
- https://222.220.16.185/data6/q[REMOVED].exe - Trojan-PSW.Win32.QQPass.hn
- https://222.220.16.185/data6/c[REMOVED].exe - Trojan-Dropper.Win32.Agent.ayv
Note: The download links may vary depending on the content of the downloaded text file.
Moreover, Agent.BAO also creates a file named autorun.inf in the directory where the copy of the trojan is located. This is used to automatically execute the trojan when the folder is opened.
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