This New Malware Family Using CLFS Log Files to Avoid Detection

Cybersecurity researchers have disclosed details about a new malware family that relies on the Common Log File System CLFS to hide a second-stage payload in registry transaction files in an attempt to evade detection mechanisms. FireEye's Mandiant Advanced Practices team, which made the discovery...

Applied YARA training Q&A

Introduction On August 31, 2021 we ran a joint webinar between VirusTotal and Kaspersky, with a focus on YARA rules best practices and real world examples. If you didnt have the chance to watch the webinar live, you can see it as a recording on Brighttalk: Applied YARA training. During the webina...

Detecting Embedded Content in OOXML Documents

On Advanced Practices, we are always looking for new ways to find malicious activity and track adversaries over time. Today we’re sharing a technique we use to detect and cluster Microsoft Office documents—specifically those in the Office Open XML OOXML file format. Additionally, we’re releasing ...

CVE-2021-3402

An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earlier could allow an attacker to either cause denial of service or information disclosure via a malicious Mach-O file. Affects all versions before libyara 4.0.4...

CVE-2021-3402

An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earlier could allow an attacker to either cause denial of service or information disclosure via a malicious Mach-O file. Affects all versions before libyara 4.0.4...

UBUNTU-CVE-2021-3402

An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earlier could allow an attacker to either cause denial of service or information disclosure via a malicious Mach-O file. Affects all versions before libyara 4.0.4...

Integer overflow

An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earlier could allow an attacker to either cause denial of service or information disclosure via a malicious Mach-O file. Affects all versions before libyara 4.0.4...

CVE-2021-3402

An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earlier could allow an attacker to either cause denial of service or information disclosure via a malicious Mach-O file. Affects all versions before libyara 4.0.4...

CVE-2021-3402

An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earlier could allow an attacker to either cause denial of service or information disclosure via a malicious Mach-O file. Affects all versions before libyara 4.0.4...

CVE-2021-3402

CVE-2021-3402 affects YARA v4.0.3 and earlier due to an integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c. This can allow a malicious Mach-O file to cause a denial of service or information disclosure . The vulnerability is fixed in libyara 4.0.4 ; upgrading to t...

[SECURITY] Fedora 33 Update: python-yara-4.1.0-1.fc33

Python binding for the YARA pattern matching tool. YARA is a tool aimed at but not limited to helping malware researchers to identify and classify malware samples. With YARA you can create descriptions of malware families or whatever you want to describe based on textual or binary patterns. Each...

[SECURITY] Fedora 33 Update: yara-4.1.0-1.fc33

YARA is a tool aimed at but not limited to helping malware researchers to identify and classify malware samples. With YARA you can create descriptions of malware families or whatever you want to describe based on textual or binary patterns. Each description, a.k.a rule, consists of a set of strin...

Fedora: Security Advisory for python-yara (FEDORA-2021-dd62918333)

The remote host is missing an update for the Copyright C 2021 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

Fedora: Security Advisory for yara (FEDORA-2021-dd62918333)

The remote host is missing an update for the Copyright C 2021 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

[SECURITY] Fedora 34 Update: yara-4.1.0-1.fc34

YARA is a tool aimed at but not limited to helping malware researchers to identify and classify malware samples. With YARA you can create descriptions of malware families or whatever you want to describe based on textual or binary patterns. Each description, a.k.a rule, consists of a set of strin...

[SECURITY] Fedora 34 Update: python-yara-4.1.0-1.fc34

Python binding for the YARA pattern matching tool. YARA is a tool aimed at but not limited to helping malware researchers to identify and classify malware samples. With YARA you can create descriptions of malware families or whatever you want to describe based on textual or binary patterns. Each...

Fedora: Security Advisory for yara (FEDORA-2021-f41d5fc954)

The remote host is missing an update for the Copyright C 2021 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

Fedora: Security Advisory for python-yara (FEDORA-2021-f41d5fc954)

The remote host is missing an update for the Copyright C 2021 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

YARA 输入验证错误漏洞

YARA is a set of tools used to help software researchers identify and categorize malware samples. An input validation error vulnerability in YARA v4.0.3 and earlier, which stems from integer overflow and buffer overflow reads in libyara/modules/macho/macho.c, allows attackers to cause a denial of...

Detecting Post-Compromise Threat Activity Using the CHIRP IOC Detection Tool

Summary Updated April 15, 2021: The U.S. Government attributes this activity to the Russian Foreign Intelligence Service SVR. Additional information may be found in astatement from the White House. For more information on SolarWinds-related activity, go to...