Microsoft addresses App Installer abuse

28 October 2024 Update Microsoft disabled the ms-appinstaller URI scheme handler by default in App Installer on 28 December 2023 as a security response to protect customers from attackers’ evolving techniques against previous safeguards for CVE-2021-43890. Microsoft is pleased to announce that we...

LUCR-3: Scattered Spider Getting SaaS-y in the Cloud

LUCR-3 overlaps with groups such as Scattered Spider, Oktapus, UNC3944, and STORM-0875 and is a financially motivated attacker that leverages the Identity Provider IDP as initial access into an environment with the goal of stealing Intellectual Property IP for extortion. LUCR-3 targets Fortune 20...

RedLine/Vidar Abuses EV Certificates, Shifts to Ransomware

In this blog, we investigate how threat actors used information-stealing malware with EV code signing certificates and later delivered ransomware payloads to its victims via the same delivery method...

Old certificate, new signature: Open-source tools forge signature timestamps on Windows drivers

Cisco Talos has observed threat actors taking advantage of a Windows policy loophole that allows the signing and loading of cross-signed kernel mode drivers with signature timestamp prior to July 29, 2015. Actors are leveraging multiple open-source tools that alter the signing date of kernel mode...

Service Provider SAML Signing Certificate FAQ

Q: What is SAML signing? A: SAML signing certificates are X.509 certificates used to verify data sent between the Service Provider SP and SAML provider IdP. Your SAML provider IdP uses the Citrix Cloud SAML signing certificate to verify the signature sent by Citrix Cloud within its SAML...

CertVerify - A Scanner That Files With Compromised Or Untrusted Code Signing Certificates

The CertVerify is a tool designed to detect executable files exe, dll, sys that have been signed with untrusted or leaked code signing certificates. The purpose of this tool is to identify potentially malicious files that have been signed using certificates that have been compromised, stolen, or...

SUSE CVE-2013-2030

keystone/middleware/authtoken.py in OpenStack Nova Folsom, Grizzly, and Havana uses an insecure temporary directory for storing signing certificates, which allows local users to spoof servers by pre-creating this directory, which is reused by Nova, as demonstrated using /tmp/keystone-signing-nova...

GitHub Breach: Hackers Stole Code-Signing Certificates for GitHub Desktop and Atom

GitHub on Monday disclosed that unknown threat actors managed to exfiltrate encrypted code signing certificates pertaining to some versions of GitHub Desktop for Mac and Atom apps. As a result, the company is taking the step of revoking the exposed certificates out of abundance of caution. The...

GitHub Breach: Hackers Stole Code-Signing Certificates for GitHub Desktop and Atom

GitHub on Monday disclosed that unknown threat actors managed to exfiltrate encrypted code signing certificates pertaining to some versions of GitHub Desktop for Mac and Atom apps. As a result, the company is taking the step of revoking the exposed certificates out of abundance of caution. The...

OpenStack Nova uses insecure keystone middleware tmpdir by default

keystone/middleware/authtoken.py in OpenStack Nova Folsom, Grizzly, and Havana uses an insecure temporary directory for storing signing certificates, which allows local users to spoof servers by pre-creating this directory, which is reused by Nova, as demonstrated using /tmp/keystone-signing-nova...

GHSA-PXXV-RV32-2QGV OpenStack Nova uses insecure keystone middleware tmpdir by default

keystone/middleware/authtoken.py in OpenStack Nova Folsom, Grizzly, and Havana uses an insecure temporary directory for storing signing certificates, which allows local users to spoof servers by pre-creating this directory, which is reused by Nova, as demonstrated using /tmp/keystone-signing-nova...

USN-5402-1: OpenSSL vulnerabilities

Elison Niven discovered that OpenSSL incorrectly handled the crehash script. A local attacker could possibly use this issue to execute arbitrary commands when crehash is run. CVE-2022-1292 Raul Metsma discovered that OpenSSL incorrectly verified certain response signing certificates. A remote...

Deep Panda deploys new rootkit “Fire Chili” by exploiting Log4shell in VMware horizon

THREAT LEVEL: Red For a detailed advisory, download the pdf file here Deep Panda, a Chinese APT group, took advantage of the well-known Log4Shell vulnerability in VMware Horizon servers to deploy a backdoor, rootkit, and steal sensitive data. This threat actor is primarily targeting firms in the...

Mandiant-Azure-AD-Investigator - PowerShell module for detecting artifacts that may be indicators of UNC2452 and other threat actor activity

This repository contains a PowerShell module for detecting artifacts that may be indicators of UNC2452 and other threat actor activity. Some indicators are "high-fidelity" indicators of compromise, while other artifacts are so called "dual-use" artifacts. Dual-use artifacts may be related to thre...

New BLISTER Malware Using Code Signing Certificates to Evade Detection

Cybersecurity researchers have disclosed details of an evasive malware campaign that makes use of valid code signing certificates to sneak past security defenses and stay under the radar with the goal of deploying Cobalt Strike and BitRAT payloads on compromised systems. The binary, a loader, has...

Google Warns of a New Way Hackers Can Make Malware Undetectable on Windows

Cybersecurity researchers have disclosed a novel technique adopted by a threat actor to deliberately evade detection with the help of malformed digital signatures of its malware payloads. "Attackers created malformed code signatures that are treated as valid by Windows but are not able to be...

Hacked Security Software Used in Novel South Korean Supply-Chain Attack

The Lazarus cybercriminal group is using a novel supply-chain attack against visitors to websites operated by the South Korean government and financial firms, in order to deliver dropper malware that eventually plants a remote access trojan on victim’s PCs. The attacks use stolen digital...

Trojanized Security Software Hits South Korea Users in Supply-Chain Attack

Cybersecurity researchers took the wraps off a novel supply chain attack in South Korea that abuses legitimate security software and stolen digital certificates to distribute remote administration tools RATs on target systems. Attributing the operation to the Lazarus Group, also known as Hidden...

Unbreakable Enterprise kernel security update

4.1.12-124.44.4 - scsi: qla2xxx: Fix NULL pointer crash due to active timer for ABTS [email protected] Orabug: 32020790 4.1.12-124.44.3 - qed: Reduce verbosity of unimplemented MFW messages Mintz, Yuval Orabug: 31959299 - kexec: validate pe files against the systemblacklistkeyring Eric...

PT-2020-1289

Name of the Vulnerable Software and Affected Versions Windows CryptoAPI Crypt32.dll versions prior to the fixed version Description A spoofing vulnerability exists in the way Windows CryptoAPI validates Elliptic Curve Cryptography ECC certificates. An attacker could exploit the vulnerability by...