Content
Downloader-BW.b
- Type
- Trojan
- SubType
- Downloader
- Discovery Date
- 03/18/2003
- Length
- 3,072 bytes
- Minimum DAT
- 4253 (03/19/2003)
- Updated DAT
- 4363 (05/26/2004)
- Minimum Engine
- 5.1.00
- Description Added
- 03/18/2003
- Description Modified
- 04/01/2003 1:59 PM (PT)
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Characteristics
This detection is for a downloader trojan which downloads and installs a remote executable. At the time of writing, the remote file was unavailable rendering this downloader useless. The trojan bears similarities with a previous variant.
The downloader is likely to be received via an email masquerading as a greetings card. The trojan was spammed out in this manner recently. When the downloader is run on the victim machine, a fake error message is displayed:
It then attempts to download a remote executable from :
http://view-blocked-yahoo.com/sysman32.exeThe SYSMAN32.EXE file is downloaded to %SysDir% as SYSMAN32.EXE, and a Registry key is added to launch it at subsequent system startup. For example:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run"SystemManager" = C:\WINNT\System32\sysman32.exe
Symptoms
Existence of the file SYSMAN32.EXE in %SysDir% coupled with the Registry hook detailed above.
Method of Infection
The downloader trojan is likely to be received via an email masquerading as a greetings card. The downloader downloads and installs a remote executable to %SysDir% as SYSMAN32.EXE.
Removal
All Users:
Use specified engine and DAT files for detection and removal.
Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).
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.
Aliases
- Trojan.GreetCard.3072 (Dialogue Science)
- TrojanDownloader.Win32.Greetyah (AVP)
Characteristics
Characteristics -
This detection is for a downloader trojan which downloads and installs a remote executable. At the time of writing, the remote file was unavailable rendering this downloader useless. The trojan bears similarities with a previous variant.
The downloader is likely to be received via an email masquerading as a greetings card. The trojan was spammed out in this manner recently. When the downloader is run on the victim machine, a fake error message is displayed:
It then attempts to download a remote executable from :
http://view-blocked-yahoo.com/sysman32.exeThe SYSMAN32.EXE file is downloaded to %SysDir% as SYSMAN32.EXE, and a Registry key is added to launch it at subsequent system startup. For example:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run"SystemManager" = C:\WINNT\System32\sysman32.exe
Symptoms
Symptoms -
Existence of the file SYSMAN32.EXE in %SysDir% coupled with the Registry hook detailed above.
Method of Infection
Method of Infection -
The downloader trojan is likely to be received via an email masquerading as a greetings card. The downloader downloads and installs a remote executable to %SysDir% as SYSMAN32.EXE.
Removal -
Removal -
All Users:
Use specified engine and DAT files for detection and removal.
Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).
Additional Windows ME/XP removal considerations
Variants
Variants -
N/A