Nueva variante de BIFROSE que se disfraza de Regedit.exe

Un fichero de nombre Regedit.exe, (y de tamaño 108804 bytes),  pero ubicado en la carpata de sistema (lo cual no s normal, ya que habitualmente se instala en C:\windows\, ha sido detectado como Backdoor de la familia BIFROSE :

File name: regedit.exe
Submission date: 2010-09-06 15:07:21 (UTC)
Current status: finished
Result: 36 /43 (83.7%)
 VT Community

not reviewed
 Safety score: – 
Compact Print results Antivirus Version Last Update Result
AhnLab-V3 2010.09.05.00 2010.09.04 Dropper/Win32.VB
AntiVir 8.2.4.50 2010.09.06 TR/Dropper.Gen
Antiy-AVL 2.0.3.7 2010.09.03 –
Authentium 5.2.0.5 2010.09.06 W32/Backdoor2.DWJR
Avast 4.8.1351.0 2010.09.06 –
Avast5 5.0.594.0 2010.09.06 Win32:Trojan-gen
AVG 9.0.0.851 2010.09.06 BackDoor.Generic10.ATMG
BitDefender 7.2 2010.09.06 Trojan.Dropper.VB.AWU
CAT-QuickHeal 11.00 2010.09.06 Win32.VirTool.VBInject.gen!BP.3
ClamAV 0.96.2.0-git 2010.09.06 Trojan.Dropper-18742
Comodo 5988 2010.09.06 TrojWare.Win32.TrojanDropper.VB.AWU0
DrWeb 5.0.2.03300 2010.09.06 BackDoor.Bifrost.788
Emsisoft 5.0.0.37 2010.09.06 Riskware.Win32.VBInject!IK
eSafe 7.0.17.0 2010.09.05 Win32.TRDropper
eTrust-Vet 36.1.7838 2010.09.06 –
F-Prot 4.6.1.107 2010.09.01 W32/Backdoor2.DWJR
F-Secure 9.0.15370.0 2010.09.06 Trojan.Dropper.VB.AWU
Fortinet 4.1.143.0 2010.09.05 –
GData 21 2010.09.06 Trojan.Dropper.VB.AWU
Ikarus T3.1.1.88.0 2010.09.06 VirTool.Win32.VBInject
Jiangmin 13.0.900 2010.09.06 TrojanDropper.VB.dwa
K7AntiVirus 9.63.2442 2010.09.04 Backdoor
Kaspersky 7.0.0.125 2010.09.06 Trojan-Dropper.Win32.VB.jpt
McAfee 5.400.0.1158 2010.09.06 BackDoor-DVL
McAfee-GW-Edition 2010.1B 2010.09.06 Heuristic.BehavesLike.Win32.Downloader.D
Microsoft 1.6103 2010.09.06 VirTool:Win32/VBInject.gen!Z
NOD32 5427 2010.09.06 a variant of Win32/TrojanDropper.VB.NMP
Norman 6.05.11 2010.09.06 W32/Suspicious_Gen2.BHPQW
nProtect 2010-09-06.01 2010.09.06 Trojan.Dropper.VB.AWU
Panda 10.0.2.7 2010.09.06 Adware/AccesMembre
PCTools 7.0.3.5 2010.09.06 Trojan-Dropper.VB.JPT
Prevx 3.0 2010.09.06 High Risk System Back Door
Rising 22.64.00.04 2010.09.06 Trojan.Win32.Generic.521A4B68
Sophos 4.57.0 2010.09.06 Mal/VBDrop-G
Sunbelt 6838 2010.09.06 Trojan.Win32.Buzus (v)
SUPERAntiSpyware 4.40.0.1006 2010.09.06 –
Symantec 20101.1.1.7 2010.09.06 Backdoor.Trojan
TheHacker 6.5.2.1.365 2010.09.06 –
TrendMicro 9.120.0.1004 2010.09.06 WORM_MAINBOT.MCL
TrendMicro-HouseCall 9.120.0.1004 2010.09.06 WORM_MAINBOT.MCL
VBA32 3.12.14.0 2010.09.06 Trojan-Dropper.Win32.VB.jpt
ViRobot 2010.9.6.4028 2010.09.06 –
VirusBuster 12.64.19.0 2010.09.06 Trojan.DR.VB.HGRO
Additional informationShow all 
MD5   : eba0b0667ae0d60d14cd095b3c60218d
SHA1  : dc4caca2111bb8b6cb6a3d97140227a01a93d1e1

A partir del ELIITRIIP 6.92 hemos pasado a controlar y eliminar dicha variante.

saludos

ms, 7-9-2010