Malware reports

Like Pigs in Mud: May 2001 Virus List

Anti-virus software developer Sophos has published its latest update to the “Top Ten” frequently occurring viruses according to percentage, this one for the month of May 2001.

Debuting in the top spot is the Visual Basic Script virus Mawanella (a.k.a. VBS.VBSWG.X) at 37.5%, followed by a quintet of Win32 viruses: I-Worm.Magistr at 24.5%, dropping a notch from number one last month to second; I-Worm.Hybris maintaining the third slot at 7.1%; I-Worm.Badtrans coming in fourth, up from sixth last month, at 6.9%; and I-Worm.MTX (a.k.a. Apology) stays on the chart, dropping one notch to number five at 4.4%.

The second half of the chart has two other VBS viruses placing: our old nemesis KakWorm remains on the list, dropping four spots to number six at 3.9%; and a variant of the previously mentioned Mawanella virus debuts in the seventh slot at 2.1%.

The top ten for May is rounded out by the Word 97 virus-a re-entry to the chart-Marker in the eighth slot at 1.5%; the Win32 virus RC5.b (a.k.a. Bymer) dropping down one to number nine at 1.0%; the Win32 virus FunLove (a.k.a Flcss) also coming in at nine at 1.0%, dropping four notches from last month; and the remaining 10.1% is occupied by various viruses, worms, and Trojans.

Be sure to tune in next month for the virus “Top Ten.”

Like Pigs in Mud: May 2001 Virus List

Your email address will not be published. Required fields are marked *



Lazarus targets defense industry with ThreatNeedle

In mid-2020, we realized that Lazarus was launching attacks on the defense industry using the ThreatNeedle cluster, an advanced malware cluster of Manuscrypt (a.k.a. NukeSped). While investigating this activity, we were able to observe the complete life cycle of an attack, uncovering more technical details and links to the group’s other campaigns.

Sunburst backdoor – code overlaps with Kazuar

While looking at the Sunburst backdoor, we discovered several features that overlap with a previously identified backdoor known as Kazuar. Our observations shows that Kazuar was used together with Turla tools during multiple breaches in past years.

Lazarus covets COVID-19-related intelligence

As the COVID-19 crisis grinds on, some threat actors are trying to speed up vaccine development by any means available. We have found evidence that the Lazarus group is going after intelligence that could help these efforts by attacking entities related to COVID-19 research.

Sunburst: connecting the dots in the DNS requests

We matched private and public DNS data for the SUNBURST-malware root C2 domain with the CNAME records, to identify who was targeted for further exploitation. In total, we analyzed 1722 DNS records, leading to 1026 unique target name parts and 964 unique UIDs.

Subscribe to our weekly e-mails

The hottest research right in your inbox