Matt Johansen Profile picture
May 28, 2024 12 tweets 4 min read Read on X
The DoJ just busted a massive scam involving North Korean IT workers infiltrating major US companies.

They had some help in the US and were posing as remote freelancers to siphon off money and sensitive info.

Holy crap, here's what we know:
How they operated:

North Korean operatives are stationed in countries like China, Russia, and parts of Eastern Europe and Southeast Asia.

They then use fake documents and buy accounts to get remote jobs in the States. Image
On May 16, the DOJ indicted five people connected to this scheme.

One is an Arizona woman who helped North Korean IT workers by validating stolen identities, making them look like US citizens. Image
This woman also hosted laptops from US companies to spoof locations

This bypassed any geofencing making it seem like the North Korean workers were based in the US. Image
The scheme has raked in millions of dollars in wages from over 300 companies.

This money likely supports North Korea's regime, including its nuclear weapons program, according to the FBI. Image
North Korea's government is highly motivated due to heavy international sanctions.

They've been behind major cyber heists like the $81 million stolen from Bangladesh Bank via the SWIFT system in 2016. Image
Facilitators, or "mules," are key players in this operation.

They manage multiple fake identities and handle risky tasks like job interviews and drug tests, then pass the credentials to the actual North Korean workers. Image
These facilitators make big money.

For example, a Ukrainian facilitator managed about 870 identities and hosted 80 computers, earning over $900,000 over six years. Image
The IT workers, often highly skilled, work under harsh conditions with strict oversight.

Their activities include cryptojacking, targeting security researchers(!!!), and other cyber attacks to fund the regime. Image
How does your company verify remote worker identities? Would your process stand up to this threat?
I cover this and dozens more cybersecurity news stories ever week in my free newsletter.

Join over 12,000 other pros here: vulnu.xyz/tw

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More from @mattjay

Apr 18
🧵 THREAD: A federal whistleblower just dropped one of the most disturbing cybersecurity disclosures I’ve ever read.

He's saying DOGE came in, data went out, and Russians started attempting logins with new valid DOGE passwords

Media's coverage wasn't detailed enough so I dug into his testimony:Image
Who’s the whistleblower?

Daniel Berulis — a senior DevSecOps architect at the National Labor Relations Board (NLRB), formerly with TS/SCI clearance.

He just told Congress the Department of Government Efficiency (DOGE) pulled off a covert cyber op inside a federal agency. Image
DOGE demanded root access.
Not auditor access. Not admin.

They were given “tenant owner” privileges in Azure — full control over the NLRB’s cloud, above the CIO himself.
This is never supposed to happen. Image
Read 13 tweets
Mar 5
MSFT released new research on Silk Typhoon's supply chain attacks.

Key shift: Group now heavily leveraging stolen API keys and PAM credentials to hit downstream customers, particularly state/local gov and IT sector targets.

Here's what we know 🧵
Initial access vectors include 0days, compromised third-party services, and password spraying.

Notable: Found several instances of corporate creds exposed via public GitHub repos being used in attacks. (They should be following @InsecureNature) Image
@InsecureNature Post-compromise, actors use stolen API keys to access downstream customer environments.

Primary focus: Data collection related to China interests, US gov policy, and LE investigations. Image
Read 8 tweets
Feb 11
Hackers are using Google Tag Manager (GTM) to inject credit card skimmers into E-commerce sites.

At least 6 compromised sites identified so far. Here's what we're seeing. 👇
Malicious GTM script reference (GTM-MLHK2N68) stored in Magento's cms_block.content table.

Attackers using GTM as delivery mechanism to bypass security controls. Image
Obfuscated JS skimmer activates on checkout pages, exfiltrating card data to C2 domain eurowebmonitortool[.]com.

Additional persistence achieved via PHP backdoor in media/index.php allowing remote code execution through base64-encoded commands.

Gives attackers ongoing access post-cleanup.Image
Read 8 tweets
Feb 6
🚨 New DPRK malware "FlexibleFerret" targeting MacOS discovered.

It's part of broader campaign that's been active since Nov 2023. Currently evading Apple's XProtect detection.

Here's what we know 👇
Campaign context: Threat actors posing as employers, targeting software devs through fake job interviews.

Previously identified by Unit 42 targeting Windows/Linux/MacOS platforms. Image
The new malware, discovered by SentinelLabs, is distributed via Apple Installer package, signed with valid Apple Developer sig + Team ID.

DPRK is apparently maintaining legitimate dev credentials. Image
Read 9 tweets
Jan 7
Hackers claim to have compromised Gravy Analytics, exposing millions of smartphone location records—including data sold to U.S. government agencies.

This could be the first major breach of a location data broker. Here’s what you need to know 👇
Potential impact:
- Precise GPS coordinates + timestamps on millions of people
- User movement classifications ("LIKELY_DRIVING")
- Customer lists (Apple, Uber, Equifax & more)
- Root access to Gravy's servers, control of domains, and Amazon S3 buckets Image
For years, firms like Gravy have sold location data to military, DHS, and even the FBI. Now hackers claim to have access dating back to 2018.

Potential risks:
- De-anonymization of individuals
- Tracking high-risk people
- Exposure of schools, clinics, and more
(img: EFF) Image
Read 5 tweets
Nov 27, 2024
This is nuts.

Major investigation reveals ExxonMobil allegedly orchestrated hack-for-hire campaign targeting 500+ climate activists and journalists. Image
The campaign deployed 28K+ malicious URLs and 100+ targeted phishing attempts.

It's annual budget is estimated at $10M+ through DCI Group (PR firm). Image
The chain that this report traced through:
DCI Group -> Israeli PI, Amit Forlit -> BellTroX InfoTech Services (India-based hack-for-hire). Image
Read 11 tweets

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