Buffalo in Japan is red-faced after its Website shipped Trojan-infected Windows driver updates for a bunch of its peripherals, including broadband routers, home NAS, and Bluetooth mice.
According to this notice (Google translation here), the installers were modified to include Infostealer.Bankeiya.B, which steals bank account data.
Symantec reports that Buffalo moved quickly, removing the compromised files on the same day, May 27, as they appeared.
As a result, the ten compromised files were only downloaded 856 times, from 540 unique IPs.
spotted two variants in the attack. In one, the compromised files had
the self-extracting setup.exe RAR file modified to execute a malicious
DLL during installation. This linked to a second DLL that downloaded and
In the second, “a Buffalo
installer is included within Infostealr.Bankeiya.B and
Infostealer.Bankeiya.B is made to look like a legitimate installer. This
means that running the installer will drop the setup.exe file for the
legitimate driver as well as a component of the Trojan that drops a
malicious .dll which downloads the main component of
Users that downloaded the update have
been told not to use Internet banking until they've disinfected their
machines. McAfee and Symantec products catch the Trojan, Buffalo says.