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Microsoft Patch Tuesday, June 2022 Edition

mercredi 15 juin 2022 à 06:52

Microsoft on Tuesday released software updates to fix 60 security vulnerabilities in its Windows operating systems and other software, including a zero-day flaw in all supported Microsoft Office versions on all flavors of Windows that’s seen active exploitation for at least two months now. On a lighter note, Microsoft is officially retiring its Internet Explorer (IE) web browser, which turns 27 years old this year.

Three of the bugs tackled this month earned Microsoft’s most dire “critical” label, meaning they can be exploited remotely by malware or miscreants to seize complete control over a vulnerable system. On top of the critical heap this month is CVE-2022-30190, a vulnerability in the Microsoft Support Diagnostics Tool (MSDT), a service built into Windows.

Dubbed “Follina,” the flaw became public knowledge on May 27, when a security researcher tweeted about a malicious Word document that had surprisingly low detection rates by antivirus products. Researchers soon learned that the malicious document was using a feature in Word to retrieve a HTML file from a remote server, and that HTML file in turn used MSDT to load code and execute PowerShell commands.

“What makes this new MS Word vulnerability unique is the fact that there are no macros exploited in this attack,” writes Mayuresh Dani, manager of threat research at Qualys. “Most malicious Word documents leverage the macro feature of the software to deliver their malicious payload. As a result, normal macro-based scanning methods will not work to detect Follina. All an attacker needs to do is lure a targeted user to download a Microsoft document or view an HTML file embedded with the malicious code.”

Kevin Beaumont, the researcher who gave Follina its name, penned a fairly damning account and timeline of Microsoft’s response to being alerted about the weakness. Beaumont says researchers in March 2021 told Microsoft they were able achieve the same exploit using Microsoft Teams as an example, and that Microsoft silently fixed the issue in Teams but did not patch MSDT in Windows or the attack vector in Microsoft Office.

Beaumont said other researchers on April 12, 2022 told Microsoft about active exploitation of the MSDT flaw, but Microsoft closed the ticket saying it wasn’t a security issue. Microsoft finally issued a CVE for the problem on May 30, the same day it released recommendations on how to mitigate the threat from the vulnerability.

Microsoft also is taking flak from security experts regarding a different set of flaws in its Azure cloud hosting platform. Orca Security said that back on January 4 it told Microsoft about a critical bug in Azure’s Synapse service that allowed attackers to obtain credentials to other workspaces, execute code, or leak customer credentials to data sources outside of Azure.

In an update to their research published Tuesday, Orca researchers said they were able to bypass Microsoft’s fix for the issue twice before the company put a working fix in place.

“In previous cases, vulnerabilities were fixed by the cloud providers within a few days of our disclosure to the affected vendor,” wrote Orca’s Avi Shua. “Based on our understanding of the architecture of the service, and our repeated bypasses of fixes, we think that the architecture contains underlying weaknesses that should be addressed with a more robust tenant separation mechanism. Until a better solution is implemented, we advise that all customers assess their usage of the service and refrain from storing sensitive data or keys in it.”

Amit Yoran, CEO of Tenable and a former U.S. cybersecurity czar, took Microsoft to task for silently patching an issue Tenable reported in the same Azure Synapse service.

“It was only after being told that we were going to go public, that their story changed…89 days after the initial vulnerability notification…when they privately acknowledged the severity of the security issue,” Yoran wrote in a post on LinkedIn. “To date, Microsoft customers have not been notified. Without timely and detailed disclosures, customers have no idea if they were, or are, vulnerable to attack…or if they fell victim to attack prior to a vulnerability being patched. And not notifying customers denies them the opportunity to look for evidence that they were or were not compromised, a grossly irresponsible policy.”

Also in the critical and notable stack this month is CVE-2022-30136, which is a remote code execution flaw in the Windows Network File System (NFS version 4.1) that earned a CVSS score of 9.8 (10 being the worst). Microsoft issued a very similar patch last month for vulnerabilities in NFS versions 2 and 3.

“This vulnerability could allow a remote attacker to execute privileged code on affected systems running NFS. On the surface, the only difference between the patches is that this month’s update fixes a bug in NFSV4.1, whereas last month’s bug only affected versions NSFV2.0 and NSFV3.0,” wrote Trend Micro’s Zero Day Initiative. “It’s not clear if this is a variant or a failed patch or a completely new issue. Regardless, enterprises running NFS should prioritize testing and deploying this fix.”

Beginning today, Microsoft will officially stop supporting most versions of its Internet Explorer Web browser, which was launched in August 1995. The IE desktop application will be disabled, and Windows users who wish to stick with a Microsoft browser are encouraged to move to Microsoft Edge with IE mode, which will be supported through at least 2029.

For a closer look at the patches released by Microsoft today and indexed by severity and other metrics, check out the always-useful Patch Tuesday roundup from the SANS Internet Storm Center. And it’s not a bad idea to hold off updating for a few days until Microsoft works out any kinks in the updates: AskWoody.com usually has the dirt on any patches that may be causing problems for Windows users.

As always, please consider backing up your system or at least your important documents and data before applying system updates. And if you run into any problems with these updates, please drop a note about it here in the comments.

Ransomware Group Debuts Searchable Victim Data

mardi 14 juin 2022 à 21:53

Cybercrime groups that specialize in stealing corporate data and demanding a ransom not to publish it have tried countless approaches to shaming their victims into paying. The latest innovation in ratcheting up the heat comes from the ALPHV/BlackCat ransomware group, which has traditionally published any stolen victim data on the Dark Web. Today, however, the group began publishing individual victim websites on the public Internet, with the leaked data made available in an easily searchable form.

The ALPHV site claims to care about people’s privacy, but they let anyone view the sensitive stolen data.

ALPHV recently announced on its victim shaming and extortion website that it had hacked a luxury spa and resort in the western United States. Sometime in the last 24 hours, ALPHV published a website with the same victim’s name in the domain, and their logo on the homepage.

The website claims to list the personal information of 1,500 resort employees, and more than 2,500 residents at the facility. At the top of the page are two “Check Yourself” buttons, one for employees, and another for guests.

Brett Callow, a threat analyst with security firm Emsisoft, called the move by ALPHV “a cunning tactic” that will most certainly worry their other victims.

Callow said most of the victim shaming blogs maintained by the major ransomware and data ransom groups exist on obscure, slow-loading sites on the Darknet, reachable only through the use of third-party software like Tor. But the website erected by ALPHV as part of this new pressure tactic is available on the open Internet.

“Companies will likely be more concerned about the prospect of their data being shared in this way than of simply being posted to an obscure Tor site for which barely anyone knows the URL,” Callow said. “It’ll piss people off and make class actions more likely.”

It’s unclear if ALPHV plans to pursue this approach with every victim, but other recent victims of the crime group include a school district and a U.S. city. Most likely, this is a test run to see if it improves results.

“We are not going to stop, our leak distribution department will do their best to bury your business,” the victim website reads. “At this point, you still have a chance to keep your hotel’s security and reputation. We strongly advise you to be proactive in your negotiations; you do not have much time.”

Emerging in November 2021, ALPHV is perhaps most notable for its programming language (it is written in Rust). ALPHV has been actively recruiting operators from several ransomware organizations — including REvilBlackMatter and DarkSide — offering affiliates up to 90 percent of any ransom paid by a victim organization.

Many security experts believe ALPHV/BlackCat is simply a rebrand of another ransomware group — “Darkside” a.k.a. “BlackMatter,” the same gang responsible for the 2021 attack on Colonial Pipeline that caused fuel shortages and price spikes for several days last summer.

Callow said there may be an upside to this ALPHV innovation, noting that his wife recently heard directly from a different ransomware group — Cl0p.

“On a positive note, stunts like this mean people may actually find out that their PI has been compromised,” he said. “Cl0p emailed my wife last year. The company that lost her data still hasn’t made any public disclosure or notified the people who were impacted (at least, she hasn’t heard from the company.)”

“Downthem” DDoS-for-Hire Boss Gets 2 Years in Prison

mardi 14 juin 2022 à 02:09

A 33-year-old Illinois man was sentenced to two years in prison today following his conviction last year for operating services that allowed paying customers to launch powerful distributed denial-of-service (DDoS) attacks against hundreds of thousands of Internet users and websites.

The user interface for Downthem[.]org.

Matthew Gatrel of St. Charles, Ill. was found guilty for violations of the Computer Fraud and Abuse Act (CFAA) related to his operation of downthem[.]org and ampnode[.]com, two DDoS-for-hire services that had thousands of customers who paid to launch more than 200,000 attacks.

Despite admitting to FBI agents that he ran these so-called “booter” services (and turning over plenty of incriminating evidence in the process), Gatrel opted to take his case to trial, defended the entire time by public defenders. Gatrel’s co-defendant and partner in the business, Juan “Severon” Martinez of Pasadena, Calif., pleaded guilty just before the trial.

After a nine-day trial in the Central District of California, Gatrel was convicted on all three counts, including conspiracy to commit unauthorized impairment of a protected computer, conspiracy to commit wire fraud, and unauthorized impairment of a protected computer.

Prosecutors said Downthem sold subscriptions allowing customers to launch DDoS attacks, while AmpNode provided “bulletproof” server hosting to customers — with an emphasis on “spoofing” servers that could be pre-configured with DDoS attack scripts and lists of vulnerable “attack amplifiers” used to launch simultaneous cyberattacks on victims.

Booter and stresser services let customers pick from among a variety of attack methods, but almost universally the most powerful of these methods involves what’s known as a “reflective amplification attack.” In such assaults, the perpetrators leverage unmanaged Domain Name Servers (DNS) or other devices on the Web to create huge traffic floods.

Ideally, DNS servers only provide services to machines within a trusted domain — such as translating an Internet address from a series of numbers into a domain name, like example.com. But DNS reflection attacks rely on consumer and business routers and other devices equipped with DNS servers that are (mis)configured to accept queries from anywhere on the Web.

Attackers can send spoofed DNS queries to these DNS servers, forging the request so that it appears to come from the target’s network. That way, when the DNS servers respond, they reply to the spoofed (target) address.

The bad guys also can amplify a reflective attack by crafting DNS queries so that the responses are much bigger than the requests. For example, an attacker could compose a DNS request of less than 100 bytes, prompting a response that is 60-70 times as large. This “amplification” effect is especially pronounced if the perpetrators query dozens of DNS servers with these spoofed requests simultaneously.

The government charged that Gatrel and Martinez constantly scanned the Internet for these misconfigured devices, and then sold lists of Internet addresses tied to these devices to other booter service operators.

“Gatrel ran a criminal enterprise designed around launching hundreds of thousands of cyber-attacks on behalf of hundreds of customers,” prosecutors wrote in a memorandum submitted in advance of his sentencing. “He also provided infrastructure and resources for other cybercriminals to run their own businesses launching these same kinds of attacks. These attacks victimized wide swaths of American society and compromised computers around the world.”

The U.S. and United Kingdom have been trying to impress on would-be customers of these booter services that hiring them for DDoS attacks is illegal. The U.K. has even taken out Google ads to remind U.K. residents when they search online for terms common to booter services.

The case against Gatrel and Martinez was brought as part of a widespread crackdown on booter services in 2018, when the FBI joined law enforcement partners overseas to seize 15 different booter service domains.

Those actions have prompted a flurry of prosecutions, with wildly varying sentences when the booter service owners are invariably found guilty. However, DDoS experts say booter and stresser services that remain in operation continue to account for the vast majority of DDoS attacks launched daily around the globe.

Adconion Execs Plead Guilty in Federal Anti-Spam Case

samedi 11 juin 2022 à 02:04

At the outset of their federal criminal trial for hijacking vast swaths of Internet addresses for use in large-scale email spam campaigns, three current or former executives at online advertising firm Adconion Direct (now Amobee) have pleaded guilty to lesser misdemeanor charges of fraud and misrepresentation via email.

In October 2018, prosecutors in the Southern District of California named four Ad employees — Jacob BychakMark ManoogianPetr Pacas, and Mohammed Abdul Qayyum —  in a ten-count indictment (PDF) on felony charges of conspiracy, wire fraud, and electronic mail fraud.

The government alleged that between December 2010 and September 2014, the defendants engaged in a conspiracy to identify or pay to identify blocks of Internet Protocol (IP) addresses that were registered to others but which were otherwise inactive.

Prosecutors said the men also sent forged letters to an Internet hosting firm claiming they had been authorized by the registrants of the inactive IP addresses to use that space for their own purposes.

All four defendants pleaded not guilty when they were charged back in 2018, but this week Bychak, Manoogian and Qayyum each entered a plea deal.

“The defendants’ jobs with Adconion were to acquire fresh IP addresses and employ other measures to circumvent the spam filters,” reads a statement released today by the U.S. Attorney for the Southern District of California, which said the defendants would pay $100,000 in fines each and perform 100 hours of community service.

“To conceal Adconion’s ties to the stolen IP addresses and the spam sent from these IP addresses, the defendants used a host of DBAs, virtual addresses, and fake names provided by the company,” the statement continues. “While defendants touted ties to well-known name brands, the email marketing campaigns associated with the hijacked IP addresses included advertisements such as ‘BigBeautifulWomen,’ ‘iPhone4S Promos,’ and ‘LatinLove[Cost-per-Click].'”

None of the three plea agreements are currently available on PACER, the online federal court document clearinghouse. However, PACER does show that on June 7 — the same day the pleas were entered by the defendants —  the government submitted to the court a superseding set of just two misdemeanor charges (PDF) of fraud in connection with email.

Another document filed in the case says the fourth defendant — Pacas — accepted a deferred prosecution deal, which includes a probationary period and a required $50,000 “donation” to a federal “crime victims fund.”

There are fewer than four billion so-called “Internet Protocol version 4” or IPv4 addresses available for use, but the vast majority of them have already been allocated. The global dearth of available IP addresses has turned them into a commodity wherein each IP can fetch between $15-$25 on the open market.

This has led to boom times for those engaged in the acquisition and sale of IP address blocks, but it has likewise emboldened those who specialize in absconding with and spamming from dormant IP address blocks without permission from the rightful owners.

In May, prosecutors published information about the source of some IP address ranges from which the Adconion employees allegedly spammed. For example, the government found the men leased some of their IP address ranges from a Dutch company that’s been tied to a scandal involving more than four million addresses siphoned from the African Network Information Centre (AFRINIC), the nonprofit responsible for overseeing IP address allocation for African organizations.

In 2019, AFRINIC fired a top employee after it emerged that in 2013 he quietly commandeered millions of IPs from defunct African entities or from those that were long ago acquired by other firms, and then conspired to sell an estimated $50 million worth of the IPs to marketers based outside Africa.

“Exhibit A” in a recent government court filing shows that in 2013 Adconion leased more than 65,000 IP addresses from Inspiring Networks, a Dutch network services company. In 2020, Inspiring Networks and its director Maikel Uerlings were named in a dogged, multi-part investigation by South African news outlet MyBroadband.co.za and researcher Ron Guilmette as one of two major beneficiaries of the four million IP addresses looted from AFRINIC by its former employee.

Exhibit A, from a May 2022 filing by U.S. federal prosecutors.

The address block in the above image — 196.246.0.0/16 — was reportedly later reclaimed by AFRINIC following an investigation into the findings by MyBroadband.co.za. Inspiring Networks has not responded to requests for comment.

Prosecutors allege the Adconion employees also obtained hijacked IP address blocks from Daniel Dye, another man tied to this case who was charged separately. For many years, Dye was a system administrator for Optinrealbig, a Colorado company that relentlessly pimped all manner of junk email, from mortgage leads and adult-related services to counterfeit products and Viagra. In 2018, Dye pleaded guilty to violations of the CAN-SPAM Act.

Optinrealbig’s CEO was the spam king Scott Richter, who changed the name of the company to Media Breakaway after being successfully sued for spamming by AOL, MicrosoftMySpace, and the New York Attorney General Office, among others. In 2008, this author penned a column for The Washington Post detailing how Media Breakaway had hijacked tens of thousands of IP addresses from a defunct San Francisco company for use in its spamming operations.

The last-minute plea deals by the Adconion employees were reminiscent of another recent federal criminal prosecution for IP address sleight-of-hand. In November 2021, the CEO of South Carolina technology firm Micfo pleaded guilty just two days into his trial, admitting 20 counts of wire fraud in connection with an elaborate network of phony companies set up to obtain more than 700,000 IPs from the American Registry for Internet Numbers (ARIN) — AFRINIC’s counterpart in North America.

Adconion was acquired in June 2014 by Amobee, a Redwood City, Calif. online ad platform that has catered to some of the world’s biggest brands. Amobee’s parent firm — Singapore-based communications giant Singtel — bought Amobee for $321 million in March 2012.

But as Reuters reported in 2021, Amobee cost Singtel nearly twice as much in the last year alone — $589 million — in a “non-cash impairment charge” Singtel disclosed to investors. Marketing industry blog Digiday.com reported in February that Singtel was seeking to part ways with its ad tech subsidiary.

One final note about Amobee: In response to my 2019 story on the criminal charges against the Adconion executives, Amobee issued a statement saying “Amobee has fully cooperated with the government’s investigation of this 2017 matter which pertains to alleged activities that occurred years prior to Amobee’s acquisition of the company.”

Yet as the government’s indictment points out, the alleged hijacking activities took place up until September 2014, which was after Amobee’s acquisition of Adconion Direct in June 2014. Also, the IP address ranges that the Adconion executives were prosecuted for hijacking were all related to incidents in 2013 and 2014, which is hardly “years prior to Amobee’s acquisition of the company.”

Amobee has not yet responded to requests for comment.

KrebsOnSecurity in New Netflix Series on Cybercrime

mardi 7 juin 2022 à 16:58

Netflix has a new documentary series airing next week — “Web of Make Believe: Death, Lies & the Internet” — in which Yours Truly apparently has a decent amount of screen time. The debut episode explores the far-too-common harassment tactic of “swatting” — wherein fake bomb threats or hostage situations are phoned in to police as part of a scheme to trick them into visiting potentially deadly force on a target’s address.

Image: Netflix.com

The producers of the Netflix show said footage from an interview I sat for in early 2020 on swatting and other threats should appear in the first episode. They didn’t specify what additional topics the series would scrutinize, but Netflix’s teaser for the show suggests it concerns cybercrimes that result in deadly, real-world kinetic attacks.

“Conspiracy. Fraud. Violence. Murder,” reads the Netflix short description for the series. “What starts out virtual can get real all too quickly — and when the web is worldwide, so are the consequences.”

Our family has been victimized by multiple swatting attacks over the past decade. Our first swatting, in March 2013, resulted in Fairfax County, Va. police surrounding our home and forcing me into handcuffs at gunpoint. For an excruciating two minutes, I had multiple police officers pointing rifles, shotguns and pistols directly at me.

More recently, our family was subjected to swatting attacks by a neo-Nazi group that targeted journalists, judges and corporate executives. We’ve been fortunate that none of our swatting events ended in physical harm, and that our assailants have all faced justice.

But these dangerous hoaxes can quickly turn deadly: In March 2019, 26-year-old serial swatter Tyler Barriss was sentenced to 20 years in prison for making a phony emergency call to police in late 2017 that resulted in the shooting death of an innocent Kansas resident.

In 2021, an 18-year-old Tennessee man who helped set in motion a fraudulent distress call to police that led to the death of a 60-year-old grandfather in was sentenced to five years in prison.

The first season of the new documentary series will be available on Netflix starting June 15. See you on TV!