Trojan-Downloader.Win32.Small.dcj
| Alert Level : | Medium |
| Discovered: | Oct 25 2006 |
| Tag: | Trojan Downloaders |
| Discoverer and Source: | http://www.kaspersky.com/ |
Malware Behavior and Technical Description
This Trojan downloads files via the Internet without the user’s knowledge or consent. It is a Windows PE EXE file. The file is 3,072 bytes in size. It is written in Assembler.
InstallationOnce launched, the Trojan registers itself in the system registry:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] "WinMedia" = "name_Trojan_file"
This ensures that the Trojan will be launched each time Windows is booted on the victim machine.
The Trojan also creates a unique identifier, “0b.bot” to flag its presence in the system.
Payload
The Trojan waits for the victim machine to connect to the Internet. It then connects to 245.47.***.216 on port 2514. (The port and the server address may differ according to the variant of the Trojan. The Trojan receives other malicious code from the server.
It then launches
Removal Trojan-Downloader.Win32.Small.dcj instructions:
- Use Task Manager to terminate the Trojan process.
- Delete the original Trojan file (the location will depend on how the program originally penetrated the victim machine).
- Delete the following registry keys: [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] "WinMedia" = "name_Trojan_file"
- Update your antivirus databases and perform a full scan of the computer (download a trial version of Kaspersky Anti-Virus)
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