Content
W32/Stration.dldr
- Type
- Trojan
- SubType
- Downloader
- Discovery Date
- 10/23/2006
- Length
- Varies
- Minimum DAT
- 4879 (10/23/2006)
- Updated DAT
- 5243 (03/03/2008)
- Minimum Engine
- 5.1.00
- Description Added
- 10/23/2006
- Description Modified
- 12/13/2007 8:04 AM (PT)
Tab Navigation
Characteristics
The detection for W32/Stration.dldr is for several specific trojan variants, so this description is meant as a general guide. This detection is for trojans which are intended to retrieve and execute W32/Stration from a remote server. This file will then be automatically executed on the infected machine. The exact nature of the remote file (W32/Stration) may vary. As the presence of these trojans and remote files are discovered, sites hosting these files are frequently taken down, so the downloading may cease to function as expected. This may result in empty, 0 byte files or HTML error messages being downloaded instead, or the remote file simply not being downloaded at all.
As new W32/Stration.dldr are frequently added to this detection, users are recommended to use the latest engine/DAT combination for optimal detection. Variants are likely to be packed with a PE packer, so enabling the scanning of compressed files will also provide optimal detection.
Exact details (filenames, Registry keys, file size) will vary between variants.
Typically the downloader will install itself and/or the remote file into the Windows or System directory, and hook system startup via a Registry key such as:
- HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Run - HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\RunServices - HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\
CurrentVersion\Run - HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\
CurrentVersion\RunServices
Symptoms
- Desktop firewall program alerting that a foreign application is attempting to access the Internet.
- Unknown processes are running.
- Unknown ports are open.
- Reduced system performance.
- Introduction of new files to the system
Method of Infection
This purpose of this trojan is simply to download a file from the Internet and execute it. It does not self-replicate. W32/Stration.dldr are frequently sent in spammed emails designed to entice the recipient into running the file. Other likely distribution channels for this trojan include via IRC, via peer-to-peer file-sharing networks, as an attachment in newsgroup postings, etc. Trojans may also be received as a result of poor security practices (weak username/password combination on open shares, lack of/or misconfigured firewall protection), or unpatched and vulnerable systems.
Removal
All Users
:
Use specified engine and DAT files
for detection and removal. Delete files which contain this detection.
Variants
Variants
N/A
All Information
Overview -
This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.
However, the downloaded files are W32/Stration which are mass-mailers.
Characteristics
Characteristics -
The detection for W32/Stration.dldr is for several specific trojan variants, so this description is meant as a general guide. This detection is for trojans which are intended to retrieve and execute W32/Stration from a remote server. This file will then be automatically executed on the infected machine. The exact nature of the remote file (W32/Stration) may vary. As the presence of these trojans and remote files are discovered, sites hosting these files are frequently taken down, so the downloading may cease to function as expected. This may result in empty, 0 byte files or HTML error messages being downloaded instead, or the remote file simply not being downloaded at all.
As new W32/Stration.dldr are frequently added to this detection, users are recommended to use the latest engine/DAT combination for optimal detection. Variants are likely to be packed with a PE packer, so enabling the scanning of compressed files will also provide optimal detection.
Exact details (filenames, Registry keys, file size) will vary between variants.
Typically the downloader will install itself and/or the remote file into the Windows or System directory, and hook system startup via a Registry key such as:
- HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Run - HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\RunServices - HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\
CurrentVersion\Run - HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\
CurrentVersion\RunServices
Symptoms
Symptoms -
- Desktop firewall program alerting that a foreign application is attempting to access the Internet.
- Unknown processes are running.
- Unknown ports are open.
- Reduced system performance.
- Introduction of new files to the system
Method of Infection
Method of Infection -
This purpose of this trojan is simply to download a file from the Internet and execute it. It does not self-replicate. W32/Stration.dldr are frequently sent in spammed emails designed to entice the recipient into running the file. Other likely distribution channels for this trojan include via IRC, via peer-to-peer file-sharing networks, as an attachment in newsgroup postings, etc. Trojans may also be received as a result of poor security practices (weak username/password combination on open shares, lack of/or misconfigured firewall protection), or unpatched and vulnerable systems.
Removal -
Removal -
All Users
:
Use specified engine and DAT files
for detection and removal. Delete files which contain this detection.
Additional Windows ME/XP removal considerations
Variants
Variants -
N/A
