A week in security (March 7 – March 13)

Last week on Malwarebytes Labs: The struggle to reduce bug-fixing time is real Update now! Mozilla patches two actively exploited vulnerabilities Google takes on Docs notification spammers When fake dating profiles try the military approach Azure AutoWarp brings automation headaches RagnarLocker...

Blunting RDP brute-force attacks with rate limiting

Thanks to the Malwarebytes Threat Intelligence Team for the information they provided for this article. Not long ago, guessing a Windows Remote Desktop Protocol RDP password successfully was widely regarded as ransomware operators number one choice for breaching a target. It attracted a lot of...

Microsoft Patch Tuesday, March 2022 Edition

Microsoft on Tuesday released software updates to plug at least 70 security holes in its Windows operating systems and related software. For the second month running, there are no scary zero-day threats looming for Windows users, and relatively few "critical" fixes. And yet we know from experienc...

Chinese state-sponsored threat group APT41 targets U.S. critical organizations using two Zero-Days

THREAT LEVEL: Red. For a detailed advisory, download the pdf file here A China state-sponsored threat group known as APT41 is observed compromising at least six U.S. state governments networks in a threat campaign beginning from May 2021. APT41 is a well-known Chinese state-sponsored espionage...

March 8, 2022—KB5011495 (OS Build 14393.5006) - EXPIRED

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Analysis and Protections for RagnarLocker Ransomware

Trellix Global Defenders: Analysis and Protections for RagnarLocker Ransomware By Taylor Mullins · February 28, 2022 The United States Federal Bureau of Investigation FBI has released a Flash Alert warning that the RagnarLocker ransomware gang has breached the networks of at least fifty-two...

Analysis and Protections for RagnarLocker Ransomware

Trellix Global Defenders: Analysis and Protections for RagnarLocker Ransomware By Taylor Mullins · February 28, 2022 The United States Federal Bureau of Investigation FBI has released a Flash Alert warning that the RagnarLocker ransomware gang has breached the networks of at least fifty-two...

Master Key for Hive Ransomware Retrieved Using a Flaw in its Encryption Algorithm

Researchers have detailed what they call the "first successful attempt" at decrypting data infected with Hive ransomware without relying on the private key used to lock access to the content. "We were able to recover the master key for generating the file encryption key without the attacker's...

[SECURITY] Fedora 35 Update: xrdp-0.9.18-5.fc35

xrdp provides a fully functional RDP server compatible with a wide range of RDP clients, including FreeRDP and Microsoft RDP client...

[SECURITY] Fedora 34 Update: xrdp-0.9.18-5.fc34

xrdp provides a fully functional RDP server compatible with a wide range of RDP clients, including FreeRDP and Microsoft RDP client...

Ransomware Awareness for Holidays and Weekends

Summary Immediate Actions You Can Take Now to Protect Against Ransomware • Make an offline backup of your data. • Do not click on suspicious links. • If you use RDP, secure and monitor it. • Update your OS and software. • Use strong passwords. • Usemulti-factor authentication. The Federal Bureau ...

FreeBSD : xrdp -- privilege escalation (fc2a9541-8893-11ec-9d01-80ee73419af3)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the fc2a9541-8893-11ec-9d01-80ee73419af3 advisory. - xrdp is an open source remote desktop protocol RDP server. In affected versions an integer underflow...

CVE-2022-23613

xrdp is an open source remote desktop protocol RDP server. In affected versions an integer underflow leading to a heap overflow in the sesman server allows any unauthenticated attacker which is able to locally access a sesman server to execute code as root. This vulnerability has been patched in...

CVE-2022-23613

CVE-2022-23613 affects xrdp, an open-source RDP server. Affected versions have an integer underflow causing a heap overflow in the sesman server, enabling an unauthenticated attacker with local sesman access to execute code as root. The issue is patched in xrdp version 0.9.18.1 and above; upgradi...

Mageia: Security Advisory (MGASA-2021-0272)

The remote host is missing an update for the SPDX-FileCopyrightText: 2022 Greenbone AG 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-only ifdescription...

Mageia: Security Advisory (MGASA-2013-0181)

The remote host is missing an update for the SPDX-FileCopyrightText: 2022 Greenbone AG 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-only ifdescription...

[SECURITY] Fedora 34 Update: guacamole-server-1.4.0-1.fc34

Guacamole is an HTML5 remote desktop gateway. Guacamole provides access to desktop environments using remote desktop protoc ols like VNC and RDP. A centralized server acts as a tunnel and proxy, allowing access to multiple desktops through a web browser. No browser plugins are needed, and no clie...

[SECURITY] Fedora 35 Update: guacamole-server-1.4.0-1.fc35

Guacamole is an HTML5 remote desktop gateway. Guacamole provides access to desktop environments using remote desktop protoc ols like VNC and RDP. A centralized server acts as a tunnel and proxy, allowing access to multiple desktops through a web browser. No browser plugins are needed, and no clie...

Fedora: Security Advisory for guacamole-server (FEDORA-2022-b9743d6af7)

The remote host is missing an update for the SPDX-FileCopyrightText: 2022 Greenbone AG 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-only ifdescription...

Fedora: Security Advisory for guacamole-server (FEDORA-2022-cc680f9f82)

The remote host is missing an update for the SPDX-FileCopyrightText: 2022 Greenbone AG 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-only ifdescription...