Summary
Delf.AUY is a Borland Delphi complied malware that uses Internet Explorer to download and execute 5 other password stealing malware applications. Please see the details section for more information.
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
Once Delf.AUY is executed, it will install itself by creating a copy in the system directory as intenat.exe. It uses a temporary batch file dropped in the system directory with a filename of Deleteme.bat to delete the executed copy of itself.
Delf.AUY creates the following registry entry to enable its execution automatic upon boot up:
- [HKLM\Software\Microsoft\Windows\CurrentVersion\Run] @ = %sysdir%\intenat.exe
After the malware installs, it will then start executing its download routine. Delf.AUY searches for the installation path of Internet Explorer from the following registry entry and uses it to download some password stealing trojans:
- [HKLM\Software\Microsoft\Windows\CurrentVersion\App Paths\IEXPLORE.EXE]
If it has no value it will set it to the following hardcoded path and filename:
- C:\Program Files\Internet Explorer\IEXPLORE.EXE
Below is a list of the URLs from where it will attempt to download other malware:
- https://www.ac66.cn/down/[BLOCKED]ezi.exe detected as Trojan-PSW.Win32.Delf.pw
- https://www.ac66.cn/down/[BLOCKED]hxy.exe detected as Trojan-PSW.Win32.WOW.de
- https://www.ac66.cn/down/[BLOCKED]ichong.exe detected as Trojan-PSW.Win32.Delf.px
- https://www.ac66.cn/down/[BLOCKED]q.exe detected as Trojan-PSW.Win32.QQRob.hw
- https://www.ac66.cn/down/[BLOCKED]x.exe detected as Trojan-PSW.Win32.Lmir.bac
Delf.AUY will save and execute the downloads to these hardcoded path and filenames:
- C:\program files\system.exe
- C:\program files\system2.exe
- C:\program files\system3.exe
- C:\program files\system4.exe
- C:\program files\system5.exe
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.