MSRT Disinfected 52,549 Computers from the 'Win32/Ramnit' Mailware Infection

As of May 20th, Microsoft Removal Tool (MSRT) disinfected 52,549 computers from the Win32/Ramnit infection, revealed MMPC blog. Ramnit is one of the four parasitic viruses out of the top 10 detected threat families. Win32/Ramnit was added to MSRT detection capability, last month.You may notice that Ramnit is classified as an "evolved" virus in the […]

As of May 20th, Microsoft Removal Tool (MSRT) disinfected 52,549 computers from the Win32/Ramnit infection, revealed MMPC blog. Ramnit is one of the four parasitic viruses out of the top 10 detected threat families. Win32/Ramnit was added to MSRT detection capability, last month.

You may notice that Ramnit is classified as an "evolved" virus in the chart.

"A parasitic virus, or a file infector, is a type of "old school" malware that attaches, modifies or resides in a host file on the file system. Due to its invasive spreading technique, one may wonder why malware are still in love with this old method, particularly when file infectors tend to leave the computer in an unstable state, slow and crashing often, while some even render the infected computer useless," explained Scott Wu.

"With today's malware authors aiming to make profit from their victims, one would expect the malware authors are motivated to create stealth threats with the least overhead to the machine as to keep the windows of time open long enough to harvest data (or perform other payloads)."

Parasite viruses are not going away, they are still relevant and evolving.

Top 25 detections by MSRT, May 10 - May 20

FamilyMachine CountNote
Sality202,351Classic parasitic virus
Taterf77,236Worm
Rimecud65,149Worm
Vobfus59,918Worm
Alureon58,884Evolvedparasitic virus
Parite53,778Evolvedparasitic virus
Ramnit52,549Evolvedparasitic virus
Brontok50,392Worm
Cycbot50,209Trojan
Conficker49,173Worm
Renocide48,395Worm
Bubnix45,712Trojan
FakeRean40,695Rogue
Zbot40,087Trojan
Bancos39,452Trojan
Frethog33,100Evolvedparasitic virus
Banker31,675Trojan
Jeefo22,396Classic parasitic virus
Renos21,858Trojan
Lethic21,521Trojan
Cutwail21,222Trojan
Virut20,963Classic parasitic virus
Hamweq17,102Worm
FakeVimes14,899Rogue
Hupigon14,553Trojan

[Source: MMPC]