Thursday, March 12, 2020

Threat Source newsletter (March 12, 2020)


Newsletter compiled by Jon Munshaw.

Welcome to this week’s Threat Source newsletter — the perfect place to get caught up on all things Talos from the past week.

Obviously, COVID-19 is dominating headlines everywhere, and for good reason. We hope everyone out there is staying safe and healthy and making the appropriate decisions when it comes to traveling and working.

In certainly less serious news, we have our monthly Microsoft Patch Tuesday post and the accompanying Snort rules out. There is also a large Vulnerability Spotlight out on several vulnerabilities we discovered in WAGO products, a popular producer of automation software.

And, as always, we have the latest Threat Roundup where we go through the top threats we saw — and blocked — over the past week.

Upcoming public engagements

Event: “Everyone's Advanced Now: The evolution of actors on the threat landscape” at Interop Tokyo 2020
Location: Makuhari Messe, Tokyo, Japan
Date: June 10 - 12
Speakers: Nick Biasini
Synopsis: In the past, there were two clear classes of adversary an enterprise would face: sophisticated and basic. These basic threats were commodity infections that would require simple triage and remediation. Today, these commodity infections can quickly turn into enterprise-crippling ransomware attacks, costing organizations millions of dollars to recover. Now more than ever, organizations need every advantage they can get — and threat intelligence is a big part of it. Having visibility into your own environment and attacks around the globe are equally vital to success. This talk will cover these trends and show how the gap between the sophisticated and the basic adversary is quickly disappearing.

Cyber Security Week in Review

  • With COVID-19 (more colloquially known as the coronavirus) dominating the headlines, threat actors are trying to capitalize. A recent wave of spam emails and ads promising to show maps about where the virus is spreading are stealing users’ login credentials and credit card numbers. 
  • Another security threat that the coronavirus poses: working from home. More companies are encouraging their employees to work remotely, which requires them to connect to a VPN often, opening them to man-in-the-middle attacks and snooping. 
  • Many security conferences are being canceled or postponed as a result of coronavirus-related mitigations and travel restrictions. Among them are multiple BSides locations and Kaspersky’s SAS. 
  • Microsoft spearheaded a takedown of the Necurs botnet, one of the largest spam and malware distributors in the world. The company took control of many sites controlled by Necurs’ creators and is preventing the botnet from adding new ones. 
  • The company behind providing water and electricity in Los Angeles are accused of covering up gaps in their security. An independent third-party firm found that the company’s IT network contained an “extremely high number of unpatched vulnerabilities.” 
  • Intel patched 10 high-severity vulnerabilities in some of its graphics drivers for Windows. One of the bugs, identified as CVE-2020-0551, bypasses all transient-related mitigations already in place to protect against exploits like Meltdown and Spectre. 
  • Mozilla released a security update for its Firefox browser, including patching a bug that could allow an attacker to steal information through a user’s Apple AirPods. There are also five other bugs rated with high severity. 
  • Attackers are exploiting a patched vulnerability in Microsoft Exchange’s Control Panel. Although Microsoft released an update for the software in February, there are still unpatched versions in the wild that could allow an adversary to obtain System-level privileges.  
  • A Russian threat actor is expected to be behind ransomware attacks on two local governments in North Carolina — likely even the same group that went after New Orleans last year.  

Notable recent security issues

Title: Microsoft Patch Tuesday includes 25 critical vulnerabilities 
Description: Microsoft released its monthly security update today, disclosing vulnerabilities across many of its products and releasing corresponding updates. This month's Patch Tuesday covers 117 vulnerabilities, 25 of which are considered critical. There is also one moderate vulnerability and 91 that are considered important. This month's patches include updates to Microsoft Media Foundation, the GDI+ API and Windows Defender, among others.
Snort SIDs: 52213, 52214, 53402 - 53409, 53414 - 53419, 53420 - 53424

Title: State-sponsored groups exploit bug in Microsoft Exchange servers
Description: The U.S. Department of Defense warned that multiple state-sponsored actors are exploiting a vulnerability in Microsoft Exchange servers. The bug was disclosed and patched in February, but many users out there have not updated their software. Attackers can send malicious, specially crafted requests to the Exchange control panel. The vulnerability allows adversaries to change serialized data to be unserialized, which allows them to run malicious code on the server’s backend at the system level.
Snort SIDs: 53380 - 53383

Most prevalent malware files this week

SHA 256: 3f6e3d8741da950451668c8333a4958330e96245be1d592fcaa485f4ee4eadb3
MD5: 47b97de62ae8b2b927542aa5d7f3c858
Typical Filename: qmreportupload.exe
Claimed Product: qmreportupload
Detection Name: Win.Trojan.Generic::in10.talos

SHA 256: 85b936960fbe5100c170b777e1647ce9f0f01e3ab9742dfc23f37cb0825b30b5
MD5: 8c80dd97c37525927c1e549cb59bcbf3
Typical Filename: eternalblue-2.2.0.exe
Claimed Product: N/A
Detection Name: W32.85B936960F.5A5226262.auto.Talos

SHA 256: 537056acb77c9c65e1beb3518e158eb6cc8c49616687621f00942befaf012274
MD5: aa9bb66a406b5519e2063a65479dab90
Typical Filename: output.148937912.txt
Claimed Product: N/A
Detection Name: Win.Dropper.Generic::vv

SHA 256: c0cdd2a671195915d9ffb5c9533337db935e0cc2f4d7563864ea75c21ead3f94
MD5: 7c38a43d2ed9af80932749f6e80fea6f
Typical Filename: wup.exe
Claimed Product: N/A
Detection Name: PUA.Win.File.Coinminer::1201

SHA 256: 1460fd00cb6addf9806a341fee9c5ab0a793762d1d97dca05fa17467c8705af7 
MD5: 88cbadec77cf90357f46a3629b6737e6
Typical Filename: FlashHelperServices.exe
Claimed Product: Flash Helper Services
Detection Name: PUA.Win.File.2144flashplayer::tpd

Keep up with all things Talos by following us on TwitterSnortClamAV and Immunet also have their own accounts you can follow to keep up with their latest updates. You can also subscribe to the Beers with Talos podcast here (as well as on your favorite podcast app). And, if you’re not already, you can also subscribe to the weekly Threat Source newsletter here.  

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