Tag cryptography

InfoSec Week 15, 2018

The U.S. Secret Service is warning about a new scam scheme where the crooks are intercepting new debit cards in the mail and replace the chips on the cards with chips from old cards. Once owners activate the cards, crooks will use stolen chips for their financial gain.

Russian state regulator Roskomnadzor have ordered to block the Telegram messaging application 48 hours after it missed a deadline to give up encryption keys to the online conversations of its users. I am not sure whether the Telegram protocol is actually blocked in Russia now.

A new Android P version will enforce applications to communicate over TLS secured connection by default.

Kudelski Security published a walk-through guide about Manger's attack against RSA OAEP. 1-bit leak from oraculum suffices to decrypt ciphertexts.

In depth article about stealing FUZE credit card content via Bluetooth.

Understanding Code Signing Abuse in Malware Campaigns. Pretty good statistics.

There is a vulnerability that results in a bypass of a tamper protection provided by the Sophos Endpoint Protection v10.7. Protection mechanism can be bypassed by deleting the unprotected registry key.

Several vulnerabilities have been found in the Apache HTTPD server. Update now.

Microsoft Windows tool certutil.exe for displaying certification authority information can be used to fetch data from the internet in the similar fashion like WGET or CURL.

There is a paper about breaking 256-bit security (NIST post-quantum candidate) WalnutDSA in under a minute.

Snallygaster - a Tool to Scan for Secrets on Web Servers

Nice map of the ongoing Linux kernel defenses. The map shows the relations between the vulnerability classes, current kernel defenses and bug detection mechanisms.

InfoSec Week 14, 2018

There is a critical flaw in Microsoft Malware Protection Engine (CVE-2018-0986). They have used the open source unrar code, changed all the signed ints, breaking the code. Remote SYSTEM memory corruption.

Blog by Latacora about the right choices and parameters when dealing with cryptography for backups, communication, authentication, etc. Nice summary, with the explanation and historical references.

An Italian football club Lazio has been scammed by a social engineering attack via email. The club sent out transfer bill of €2 million to a fraudster’s bank account instead of the Feyenoord Dutch club.

The people behind the Google Wycheproof project, which is testing crypto libraries against known attacks released test vectors for many crypto primitives.

Cloudflare announced consumer DNS service sitting on a address. Supports DNS-over-TLS, also DNS-over-HTTPS.

Good explanatory blog about the oblivious DNS and why DNS should not require our trust at all.

There is a local privilege escalation vulnerability (CVE-2018-0492) in the Debian beep package. Yes, beep package for motherboard beeping. Escalation, because setuid + race condition.

LibreSSL 2.7.0 was accepting all invalid host names as correct. A vulnerability was found by Python maintainer Christian Heimes when running tests after porting new LibreSSL to the Python 3.7. Nobody affected.

VirusTotal launches a new Android Sandbox system VirusTotal Droidy to help security researchers detect malicious apps based on behavioral analysis.

MesaLink is a new memory-safe and OpenSSL-compatible TLS library written in Rust.

InfoSec Week 11, 2018

A cyberattack on a Saudi Arabian petrochemical company was probably planed with the physical explosion in mind. They have attributed Iran, and didn't mention Stuxnet at all, so a little bit one-sided view of this cyberwarfare exchange.

There is a critical vulnerability in Credential Security Support Provider protocol (CredSSP) that affects all versions of Windows. Due to cryptographic flaw, man-in-the-middle attack could allow remote procedure calls attack and data exfiltration against the RDP and WinRM.

A vulnerability (CVE-2018-1057) in Samba allows authenticated users to change other users' password.

Kubernetes vulnerability (CVE-2017-1002101) allows containers using subpath volume mounts with any volume type to access files/directories outside of the volume, including the host’s filesystem. Updated version is already available.

Quite good exchange on the encryption policy and the government backdoor proposals between the US National Academy of Sciences and the Electronic Frontier Foundation. Relevant for all democratic regimes.

Kaspersky has discovered PlugX remote access tool (RAT) malware installed across the pharmaceutical organizations in Vietnam, aimed at stealing drug formulas and business information.

Encrypted Email Service provider ProtonMail is being blocked by internet service providers in Turkey.

CTS-Labs security researchers has published a whitepaper identifying four classes of potential vulnerabilities of the Ryzen, EPYC, Ryzen Pro, and Ryzen Mobile processor lines.

Adam Langley's blog post about the inability of the TLS 1.3 to snoop on proxy traffic.

Hacker Adrian Lamo dies at 37. He was known for his involvement in passing information on whistleblower Chelsea Manning, a former US Army soldier who leaked sensitive information to the WikiLeaks.

To find assault suspect, police in the Raleigh, North Carolina used search warrants to demand Google accounts not of specific suspects, but from any mobile devices that veered too close to the scene of a crime in specific time.

Kaspersky releases Klara, a distributed system written in Python, designed to help threat intelligence researchers hunt for new malware using Yara rules.

Nice paper about the simple manual cipher that should be resistant against the modern cryptanalysis.
LC4: A Low-Tech Authenticated Cipher for Human-To-Human Communication https://eprint.iacr.org/2017/339

InfoSec Week 9, 2018

Wandera security researchers spotted a new sophisticated Android RedDrop malware hidden in at least 53 Android applications. It can intercept SMS, record audio and exfiltrate data to the remote server.

There is an experimental support for forward secure post-quantum Extended Hash-Based Signatures (XMSS) in the OpenSSH protocol.

Blog by Matthew Green on the probable encryption key handling by Apple in the China mandated cloud. Not really satisfied explanation, only guesses, as Apple is silent about the exact key handling methodology.

Cloudflare detected new Memcached based amplification DDoS attack vector. The attacker just implants a large payload on an exposed memcached server, then, the attacker spoofs the "get" request message with target Source IP address. The memcached server could be really huge - around 1MB.

A group of computer scientists from the US and China published a paper proposing the first-ever trojan for a neural network. It's called PoTrojan and is triggered by special network input. After that, the network start to work differently.

The Cisco Talos team analyzed attribution claims around Olympic Destroyer malware. The result is to not imply blindly to Russia. Attribution is hard.

New KeePassXC version 2.3.0 was released. There are lots of new features, like new Argon2 key derivation function, SSH agent integration, browser plugin.

Trustico SSL certificate reseller revoked 23000 customer certificates by sending private keys(?!) over email to the Digicert certification authority.

There are rumors that major U.S. government contractor Cellebrite is able to unlock all current iPhone models.

An advertising network has been using a well-known malware trick, a Domain Generation Algorithm (DGA), to bypass ad blockers and deploy in-browser cryptocurrency miners since December 2017.

A novel technique is using hardware branch predictor side channel attack to bypass ASLR protection:
"Jump Over ASLR: Attacking Branch Predictors to Bypass ASLR"

InfoSec Week 8, 2018

Fraudsters are impersonating authors and publishing computer generated books so they can launder money via Amazon.

Crooks made over $3 million by installing cryptocurrency miners on Jenkins Servers by exploiting Java deserialization RCE vulnerability (CVE-2017-1000353) in the Jenkins.

Tesla's Kubernetes installed in the Amazon AWS infrastructure was compromised by hackers.They have set up private cryptocurrency mining pool there.

The co-founder of WhatsApp, Brian Acton, has given $50 millions to support Signal messenger and create a self-sustaining foundation. Very good news for this donation funded privacy technology.

Hackers are exploiting the CISCO ASA vulnerability (CVE-2018-0101) in attacks in the wild.

Security Researcher Troy Hunt published half a billion passwords collected and processed from various breaches. There is also API for this dataset, and some statistics about the password usage.

There is a critical vulnerability in Mi-Cam baby monitors that let attackers spy on infants. At least 52k users are affected.

Public key cryptography explained in the form of Ikea instructions. Check other images as well!

InfoSec Week 51, 2017

There is a remotely exploitable vulnerability in the Vitek CCTV firmware. Reverse netcat shell included.

Matthew Green thinks that the recently discovered "Extended Random" extension of the RSA’s BSAFE TLS library found in the older Canon printers could be NSA backdoor.

Filippo Valsorda presented the key recovery attack against the carry bug in x86-64 P-256 elliptic curve implementation in the Go library. JSON Web Encryption affected.

Explanation how web trackers exploit browser login managers to track users on the Internet.

According to the hacker Konstantin Kozlovsky, the creation of WannaCry and Lurk malware was supervised by the Russian FSB agency.

Short blog about the cracking encrypted (40-bit encryption) PDFs using hashcat.

Crooks behind the VenusLocker ransomware to Monero mining. They are executing Monero CPU miner XMRig as a remote thread under the legitimate Windows component wuapp.exe.

Two Romanian hackers infiltrated nearly two-thirds of the outdoor surveillance cameras in Washington, DC, as part of an extortion scheme.

Proofpoint researchers published paper on largely undocumented LazarusGroup campaigns targeting cryptocurrency individuals and organizations. The research covers implants and tactics not currently covered in the media.

InfoSec Week 47, 2017

According to the annual State of Open Source Security report, 77% of 433000 analyzed sites use at least one front-end JavaScript library with a known security vulnerability.

The AWS team published blog about the recent improvements to the secure random number generation in Linux 4.14, OpenSSL and libc.

Really good introduction to the anonymous communication network design and mix nets in general, published by Least Authority.

Those guys reverse-engineered the Furby Connect DLC file format and are able to remotely upload their own logos, songs to the device over Bluetooth.

There is a critical vulnerability in the MacOS High Sierra, anyone can login as root with empty password after clicking on login button several times. For now, it could be mitigated by just changing the root password.

Very good investigative journalism about the mysterious NSA contractor which could provided top secret documents to the Shadow Brokers.

Uber paid hackers $100k to delete stolen data on 57 million people and shut up. They have even tried to fake it as an bug bounty payment.

Someone published remote code execution exploit for the Exim Mail server (CVE-2017-16944) on GitHub. Shodan.io shows more than 400k servers with the vulnerable CHUNKING feature.

InfoSec Week 46, 2017

Multiple critical vulnerabilities were found in the Intel Management Engine, Trusted Execution Engine and Server Platform Services by Intel audit after 3rd party researchers reported the privilege escalation vulnerability.

If you have a vulnerable F5, basically attackers can sign anything with your RSA private key. An F5 BIG-IP virtual server configured with a Client SSL profile may be vulnerable to an Adaptive Chosen Ciphertext attack (AKA Bleichenbacher attack) against RSA, which when exploited, may result in plaintext recovery of encrypted messages.

MalwareHunterTeam discovered a new variant of the CryptoMix ransomware. It uses hardcoded RSA keys and can work offline.

Attackers are using Microsoft’s Office documents Dynamic Data Exchange protocol to download and install malware. Microsoft does not consider it a vulnerability.

Nice step by step guide on how to put shellcode into a legitimate PE file, and make it undetectable.

Extensive review of U2F hardware devices.

al-khaser is a PoC malware with good intentions that aims to stress your anti-malware system. It performs a bunch of nowadays malware tricks and the goal is to see if you stay under the radar.

Puffs is a domain-specific language and library for parsing untrusted file formats safely. Examples of such file formats include images, audio, video, fonts and compressed archives.

InfoSec Week 45, 2017

Researchers exploited antivirus software quarantine mechanism to gain privileges by manipulating the restore process from the virus quarantine. By abusing NTFS directory junctions, the AV quarantine restore process can be manipulated, so that previously quarantined files can be written to arbitrary file system locations.

Wikileaks released source code of leaked CIA hacking tools and it indicates that the CIA used fake certificates attributed to Kaspersky Labs for signing their malware.

A security researcher has discovered factory application in OnePlus devices. It can be used to gain root privileges, dump photos, collect WiFi & GPS information.

There was a vulnerability in CouchDB caused by a discrepancy between the database’s native JSON parser and the Javascript JSON parser used during document validation. Because CouchDB databases are meant to be exposed directly to the internet, this enabled privilege escalation, and ultimately remote code execution, on a large number of installations.

Researchers from the Princeton university have been studying third-party trackers that record sensitive personal data that users type into websites, and the results are not good.

iPhone X's Face ID facial recognition security mechanism system was circumvented by Vietnam experts using a 3D mask.

Security researcher Maxim Goryachy reports being able to execute unsigned code on computers running the Intel Management Engine through USB.

Deep dive into the Facebook sextorcism scheme using fake young girls profiles by the guys from Marseille.

Long read about how the security breaches by the Shadow Brokers damaged the US National Security Agency.

Analysis of a low cost Chinese GSM listening and location device hidden inside the plug of a standard USB data/charging cable.

Privacy Pass is a browser extension for Chrome and Firefox, which uses privacy-preserving cryptography to allow users to authenticate to the services without compromising their anonymity. It uses blind signature schemes.

InfoSec Week 43, 2017

Researchers from the Masaryk University finally published full paper of the practical cryptographic attack against the implementation of RSA in the widely used trusted platform modules / crypto tokens.
"The Return of Coppersmith’s A‚ttack: Practical Factorization of Widely Used RSA Moduli" https://crocs.fi.muni.cz/_media/public/papers/nemec_roca_ccs17_preprint.pdf

Those guys published an interesting paper about the secure cryptographic computation with the threat model without attackers based on Earth. They are proposing SpaceHSM hardware secure devices on the orbit.
"SpaceTEE: Secure and Tamper-Proof Computing in Space using CubeSats"

There is a small chance that the documents encrypted by Bad Rabbit ransomware could be recovered without paying ransom, if the shadow copies had been enabled in the Windows prior to infection. Victims can restore the original versions of the encrypted files using standard Windows backup mechanism.
For technical analysis of the Bad Rabbit ransomware, see the second link.

Google is going to deprecate the use of pinned public key certificates, public key pinning (PKP), from the Google Chrome browser.

The British government has publicly attributed North Korean government hackers as a source behind the "WannaCry" malware epidemy.

Multiple remote execution vulnerabilities (CVE-2017-13089, CVE-2017-13090) were patched in the popular software Wget. Update!

The source code of an AhMyth Android remote administration tool is available on GitHub. It can steal contact information, turn on camera, microphone, read SMS, and more.

Malscan is a robust and fully featured scanning platform for Linux servers built upon the ClamAV platform, providing all of the features of Clamscan with a host of new features and detection modes.

There is an update for the world's fastest and most advanced password recovery utility Hashcat.

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