Content
W32/Bagle.dk
- Type
- Trojan
- SubType
- Downloader
- Discovery Date
- 11/01/2005
- Length
- 9,278 bytes
- Minimum DAT
- 4617 (11/01/2005)
- Updated DAT
- 4984 (03/14/2007)
- Minimum Engine
- 5.1.00
- Description Added
- 11/01/2005
- Description Modified
- 11/01/2005 10:44 AM (PT)
Tab Navigation
Characteristics
This is a downloader trojan. However, like previous Bagle variants, it is likely that in the near future, the author(s) will post an accompanying EXE file on a remote server, which SPAMs new versions of Bagle (not to addresses harvested on the local system, but to addresses specified in spam lists also on remote web servers).
This trojan was mass-spammed in a ZIP attachment and may use any one of the following filenames:
- The_new_prices.zip
- Info_Prices.zip
- Health_and_knowledge.zip
- text_sms.zip
- max.zip
- Business.zip
- Business_dealing.zip
The ZIP file contains a file named loader.exe
Symptoms
When run, the trojan copies itself into the Windows system directory as HLOADER_EXE.EXE, for example:
C:\WINNT\SYSTEM32\HLOADER_EXE.EXE
It also creates a DLL file in this directory to perform its functions:
- HLEADER_DLL.DLL (5,632 bytes)
The following Registry key is added to hook system startup:
- HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Run "auto_hloader_key" = C:\WINNT\SYSTEM32\HLOADER_EXE.EXE - HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\
CurrentVersion\Run "auto_hloader_key" = C:\WINNT\SYSTEM32\HLOADER_EXE.EXE
Upon reboot, the trojan injects the HLEADER_DLL.DLL file into the explorer.exe process. This DLL contains a list of websites to check for updates.
The domains contacted are as follows:
- www.aro-tec.com
- sarancha.ru
- home.1000km.ru
- www.stanislawkowalczyk.netstrefa.com
- 1st-new-orleans-hotels.com
- www.OTT-INSIDE.de
- lifejacks.de
- 25kadr.org
- africa-tours.de
- wunderlampe.com
- charlies-truckerpage.de
- template.nease.net
- s89.tku.edu.tw
- phrmg.org
- www.etwas-mode.de
- www.rewardst.com
- 757555.ru
- www.8ingatlan.hu
- oklens.co.jp
- www.a2zhostings.com
- www.abavitis.hu
- abtechsafety.com
- acentrum.pl
- www.adamant-np.ru
- furdoszoba.info
- adavenue.net
- ccooaytomadrid.org
- abtechsafety.com
- av2026.comex.ru
- 80.146.233.41
- www.barth.serwery.pl
- www.leap.co.il
- virt33.kei.pl
- www.bmswijndepot.com
- 209.126.128.203
- www.timecontrol.com.pl
- adoptionscanada.ca
- 65.108.195.73
- tkdami.net
- www.ubu.pl
- adventecgroup.com
- sacafterdark.net
- agenciaspublicidadinternet.com
- www.agroturystyka.artneo.pl
- kepter.kz
- ahava.cafe24.com
- mijusungdo.net
- aibsnlea.org
- aikidan.com
- 202.44.52.38
- drinkwater.ru
- ala-bg.net
- allinfo.com.au
- eleceltek.com
- alevibirligi.ch
- alfaclassic.sk
- allanconi.it
- www.americarising.com
- americasenergyco.com
- amerykaameryka.com
- amistra.com
- analisisyconsultoria.com
- calamarco.com
Method of Infection
This trojan was mass spammed on November 1, 2005.
Removal
All Users:
Use current 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
- W32/Bagle.dk@MM
Characteristics
Characteristics -
This is a downloader trojan. However, like previous Bagle variants, it is likely that in the near future, the author(s) will post an accompanying EXE file on a remote server, which SPAMs new versions of Bagle (not to addresses harvested on the local system, but to addresses specified in spam lists also on remote web servers).
This trojan was mass-spammed in a ZIP attachment and may use any one of the following filenames:
- The_new_prices.zip
- Info_Prices.zip
- Health_and_knowledge.zip
- text_sms.zip
- max.zip
- Business.zip
- Business_dealing.zip
The ZIP file contains a file named loader.exe
Symptoms
Symptoms -
When run, the trojan copies itself into the Windows system directory as HLOADER_EXE.EXE, for example:
C:\WINNT\SYSTEM32\HLOADER_EXE.EXE
It also creates a DLL file in this directory to perform its functions:
- HLEADER_DLL.DLL (5,632 bytes)
The following Registry key is added to hook system startup:
- HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Run "auto_hloader_key" = C:\WINNT\SYSTEM32\HLOADER_EXE.EXE - HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\
CurrentVersion\Run "auto_hloader_key" = C:\WINNT\SYSTEM32\HLOADER_EXE.EXE
Upon reboot, the trojan injects the HLEADER_DLL.DLL file into the explorer.exe process. This DLL contains a list of websites to check for updates.
The domains contacted are as follows:
- www.aro-tec.com
- sarancha.ru
- home.1000km.ru
- www.stanislawkowalczyk.netstrefa.com
- 1st-new-orleans-hotels.com
- www.OTT-INSIDE.de
- lifejacks.de
- 25kadr.org
- africa-tours.de
- wunderlampe.com
- charlies-truckerpage.de
- template.nease.net
- s89.tku.edu.tw
- phrmg.org
- www.etwas-mode.de
- www.rewardst.com
- 757555.ru
- www.8ingatlan.hu
- oklens.co.jp
- www.a2zhostings.com
- www.abavitis.hu
- abtechsafety.com
- acentrum.pl
- www.adamant-np.ru
- furdoszoba.info
- adavenue.net
- ccooaytomadrid.org
- abtechsafety.com
- av2026.comex.ru
- 80.146.233.41
- www.barth.serwery.pl
- www.leap.co.il
- virt33.kei.pl
- www.bmswijndepot.com
- 209.126.128.203
- www.timecontrol.com.pl
- adoptionscanada.ca
- 65.108.195.73
- tkdami.net
- www.ubu.pl
- adventecgroup.com
- sacafterdark.net
- agenciaspublicidadinternet.com
- www.agroturystyka.artneo.pl
- kepter.kz
- ahava.cafe24.com
- mijusungdo.net
- aibsnlea.org
- aikidan.com
- 202.44.52.38
- drinkwater.ru
- ala-bg.net
- allinfo.com.au
- eleceltek.com
- alevibirligi.ch
- alfaclassic.sk
- allanconi.it
- www.americarising.com
- americasenergyco.com
- amerykaameryka.com
- amistra.com
- analisisyconsultoria.com
- calamarco.com
Method of Infection
Method of Infection -
This trojan was mass spammed on November 1, 2005.
Removal -
Removal -
All Users:
Use current 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
