Incidents

Live Twitter XSS

It’s one of these days where I just had one of these “Oh no…” moments when I logged into my Twitter account and suddenly a message box with my cookie popped up.

Apparently, there is an actively exploited XSS vulnerability on Twitter. From my first preliminary analysis, you’ll have to hover over a link to activate it and so far I have just seen some proof of concepts from people I follow. However, this vulnerability looks at least semi-wormable, so better turn JavaScript off on Twitter for now!

Update (14:05 CEST): This vulnerability is confirmed to be exploitable with no user interaction automatically. Turn off JavaScript for Twitter!

Update 2 (14:13 CEST): It is possible to load secondary JavaScript from an external URL with no user interaction, which makes this definitely wormable and dangerous.

Update 3 (14:24 CEST): Worm code for this vulnerability has been posted on IRC, making the rounds.

Update 4 (14:36 CEST): Worm is live already…

Update 5 (14:59 CEST): It appears Twitter now properly escapes links, that specific vulnerability seems closed.

Update on Infection Rates (posted by Costin): During the peak of the infection, we noticed roughly 100 posts per second which seemed to be related to the exploit. Thanks to Paul Roberts who pointed out a simple way of looking at the outbreak using Twitscoop:

The graph suggests 93 posts per second, which is not far from the peak we observed.

Although accurate numbers are hard to extrapolate from the existing data, the total number of malicious posts could have easily exceeded half a million.

Live Twitter XSS

Your email address will not be published.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