Malware reports

Virus Top Twenty for November 2003

 

1NewI-Worm.Mimail.c
34.57%
2NewI-Worm.Mimail.g
15.16%
3– 2I-Worm.Swen
13.01%
4+ 2 I-Worm.Sober
12.14%
5– 2I-Worm.Mimail.a
4.95%
6re-entry I-Worm.Klez.h
2.18%
7re-entryI-Worm.Lentin.m
1.91%
8re-entryI-Worm.Dumaru.a
1.25%
9re-entryI-Worm.Lentin.g
1.12%
10NewI-Worm.Mimail.h
0.97%
11– 3 I-Worm.Sobig.f
0.86%
12NewI-Worm.Hawawi.g
0.73%
13NewI-Worm.Mimail.e
0.67%
14– 12 I-Worm.Tanatos
0.53%
15NewI-Worm.Mimail.f
0.45%
16NewI-Worm.Mimail.j
0.42%
17re-entryI-Worm.Lovelorn.a
0.38%
18– 14 Worm.Win32.Lovesan
0.36%
19– 7Backdoor.Agobot.3.gen
0.33%
20– 14 Backdoor.SdBot.gen
0.18%
Other malicious programs*
7.84%

Position Change Name Percentage by Occurrance
* not included in the top 20

November’s list of the 20 most widespread viruses is marked by the appearance of several new variations of the Mimail network worm, most notable is I-Worm.Mimail.c which heads the chart with 34.57% of all registered incidences. Six new modifications of Mimail made the top twenty in November, and altogether accounted for nearly 62%. This dominating performance is the result of the code from the Mimail family’s first variant being published on the Internet.

Mimail managed to crowd the previous month’s leader, I-Worm.Swen, down to third place, while the undisputed leader for 2003, Sobig.f, slid down to 11th place. Making their return to the stage are ‘old friends’ Klez and Lentin.

Other worms making their return to the Top Twenty are Dumaru and Lovelorn, with Dumaru.a quickly taking 8th position.

Boldly moving up two spots is the German worm, Sober, which now maintains fourth place.

November saw Trojan programs lose considerable ground with only two malicious programs of this type (backdoor utilities used to gain unsanctioned access) – Agobot and Sdbot, filling the final two spots and dropping 7 and 14 places respectively from the previous month.

For November, Internet worms virtually monopolized the virus statistics, allowing Trojan programs a bit more than one half of one percentage point, while computer viruses were knocked completely off the list.

Malicious Program Types

Summary:

  • Making their debuts on the list are: Mimail worm family – c,e,f,g,h,j, and Hawawi.g
  • The only virus improving its position is Sober
  • Dropping are Swen, Mimail.a, Sobig.f, Tanatos.b, Lovesan, Agobot, SdBot
  • Returning to the hit parade are: Klez.h, Lentin.g and Lentin.m, Dumaru.a and Lovelorn

Virus Top Twenty for November 2003

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

 

Reports

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