Nuevas variantes (DROPPER Y DRIVER) de SIREFEF aun muy poco detectadas por los actuales AV (por solo 5 de 43)

Otras variantes de este malware pasan a ser controlada a partir de la versión 1.21 del ELISIREF de hoy.

El preanalisis del virustotal ofrece el siguiente informe:

DROPPER:

File name: 7.exe
Submission date: 2011-12-14 14:03:45 (UTC)
Result: 5/ 43 (11.6%)
VT Community

not reviewed
Safety score: –
Compact Print results Antivirus Version Last Update Result
AhnLab-V3 2011.12.13.01 2011.12.14 –
AntiVir 7.11.19.106 2011.12.14 –
Antiy-AVL 2.0.3.7 2011.12.14 –
Avast 6.0.1289.0 2011.12.14 –
AVG 10.0.0.1190 2011.12.14 –
BitDefender 7.2 2011.12.14 Gen:Variant.Kazy.48330
ByteHero 1.0.0.1 2011.12.07 Virus.Win32.Heur.c
CAT-QuickHeal 12.00 2011.12.14 –
ClamAV 0.97.3.0 2011.12.14 –
Commtouch 5.3.2.6 2011.12.14 –
Comodo 10951 2011.12.14 –
DrWeb 5.0.2.03300 2011.12.14 –
Emsisoft 5.1.0.11 2011.12.14 –
eSafe 7.0.17.0 2011.12.13 –
eTrust-Vet 37.0.9623 2011.12.14 –
F-Prot 4.6.5.141 2011.12.13 –
F-Secure 9.0.16440.0 2011.12.14 –
Fortinet 4.3.388.0 2011.12.14 –
GData 22.307/22.576 2011.12.14 Gen:Variant.Kazy.48330
Ikarus T3.1.1.109.0 2011.12.14 –
Jiangmin 13.0.900 2011.12.13 –
K7AntiVirus 9.119.5671 2011.12.13 –
Kaspersky 9.0.0.837 2011.12.14 –
McAfee 5.400.0.1158 2011.12.14 –
McAfee-GW-Edition 2010.1E 2011.12.14 –
Microsoft 1.7903 2011.12.14 –
NOD32 6711 2011.12.14 Win32/Sirefef.DK
Norman 6.07.13 2011.12.14 –
nProtect 2011-12-14.01 2011.12.14 –
Panda 10.0.3.5 2011.12.14 –
PCTools 8.0.0.5 2011.12.14 –
Prevx 3.0 2011.12.14 –
Rising 23.88.02.02 2011.12.14 –
Sophos 4.72.0 2011.12.14 Troj/ZAccess-U
SUPERAntiSpyware 4.40.0.1006 2011.12.14 –
Symantec 20111.2.0.82 2011.12.14 –
TheHacker 6.7.0.1.356 2011.12.11 –
TrendMicro 9.500.0.1008 2011.12.14 –
TrendMicro-HouseCall 9.500.0.1008 2011.12.14 –
VBA32 3.12.16.4 2011.12.13 –
VIPRE 11249 2011.12.14 –
ViRobot 2011.12.14.4825 2011.12.14 –
VirusBuster 14.1.114.0 2011.12.13 –
Additional informationShow all
MD5   : 823ea07bbb878ffd513cbecf4da14872
SHA1  : d5f0268e983b856dfc7861df94c0adae65b67dd2

File size : 361984 bytes

________

DRIVER:

File name: cdrom.sys
Submission date: 2011-12-14 14:12:49 (UTC)

Result: 5/ 43 (11.6%)
VT Community

not reviewed
Safety score: –
Compact Print results Antivirus Version Last Update Result
AhnLab-V3 2011.12.13.01 2011.12.14 –
AntiVir 7.11.19.106 2011.12.14 TR/Rootkit.Gen
Antiy-AVL 2.0.3.7 2011.12.14 –
Avast 6.0.1289.0 2011.12.14 –
AVG 10.0.0.1190 2011.12.14 –
BitDefender 7.2 2011.12.14 Rootkit.Sirefef.J
ByteHero 1.0.0.1 2011.12.07 –
CAT-QuickHeal 12.00 2011.12.14 –
ClamAV 0.97.3.0 2011.12.14 –
Commtouch 5.3.2.6 2011.12.14 –
Comodo 10951 2011.12.14 –
DrWeb 5.0.2.03300 2011.12.14 –
Emsisoft 5.1.0.11 2011.12.14 Rootkit.Win32.ZAccess!IK
eSafe 7.0.17.0 2011.12.13 –
eTrust-Vet 37.0.9623 2011.12.14 –
F-Prot 4.6.5.141 2011.12.13 –
F-Secure 9.0.16440.0 2011.12.14 –
Fortinet 4.3.388.0 2011.12.14 –
GData 22 2011.12.14 –
Ikarus T3.1.1.109.0 2011.12.14 Rootkit.Win32.ZAccess
Jiangmin 13.0.900 2011.12.13 –
K7AntiVirus 9.119.5671 2011.12.13 –
Kaspersky 9.0.0.837 2011.12.14 –
McAfee 5.400.0.1158 2011.12.14 –
McAfee-GW-Edition 2010.1E 2011.12.14 –
Microsoft 1.7903 2011.12.14 –
NOD32 6711 2011.12.14 –
Norman 6.07.13 2011.12.14 –
nProtect 2011-12-14.01 2011.12.14 –
Panda 10.0.3.5 2011.12.14 –
PCTools 8.0.0.5 2011.12.14 –
Prevx 3.0 2011.12.14 –
Rising 23.88.02.02 2011.12.14 –
Sophos 4.72.0 2011.12.14 Mal/ZAccess-C
SUPERAntiSpyware 4.40.0.1006 2011.12.14 –
Symantec 20111.2.0.82 2011.12.14 –
TheHacker 6.7.0.1.356 2011.12.11 –
TrendMicro 9.500.0.1008 2011.12.14 –
TrendMicro-HouseCall 9.500.0.1008 2011.12.14 –
VBA32 3.12.16.4 2011.12.13 –
VIPRE 11249 2011.12.14 –
ViRobot 2011.12.14.4825 2011.12.14 –
VirusBuster 14.1.114.0 2011.12.13 –
Additional informationShow all
MD5   : 18b20ce67b12bb5ebdba806b2cb81b62
SHA1  : c2719aacc6ab0f6e50c5674d28766387e741a0cf

File size : 62976 bytes

Dicha version del ELISIREF 1.21 que lo detecta y elimina, estará disponible en neustra web a partir de las 19 h CEST de hoy

saludos

ms, 14-12-2011