A deep dive into Saint Bot, a new downloader

This post was authored by Hasherezade with contributions from Hossein Jazi and Erika Noerenberg In late March 2021, Malwarebytes analysts discovered a phishing email with an attached zip file containing unfamiliar malware. Contained within the zip file was a PowerShell script masquerading as a li...

User content sandbox can be confused into opening arbitrary documents

Impact The user content sandbox can be abused to trick users into opening unexpected documents after several user interactions. The content can be opened with a blob origin from the Matrix client, so it is possible for a malicious document to access user messages and secrets. Patches This has bee...

PT-2021-2327

Name of the Vulnerable Software and Affected Versions Adobe Acrobat and Reader versions 2020.013.20074 and earlier, 2020.001.30018 and earlier, 2017.011.30188 and earlier Description A heap-based buffer overflow vulnerability exists, allowing an unauthenticated attacker to achieve arbitrary code...

CVE-2020-27248

A specially crafted document can cause the document parser to copy data from a particular record type into a static-sized buffer within an object that is smaller than the size used for the copy, which will cause a heap-based buffer overflow. In version/Instance 0x0003 and 0x0014, an attacker can...

Sharing eBook With Your Kindle Could Have Let Hackers Hijack Your Account

Amazon has addressed a number of flaws in its Kindle e-reader platform that could have allowed an attacker to take control of victims' devices by simply sending them a malicious e-book. Dubbed "KindleDrip," the exploit chain takes advantage of a feature called "Send to Kindle" to send a...

Microsoft Security Essentials RCE Vulnerability (Jan 2021)

This host is missing a critical security update according to Microsoft Security Updates released for Microsoft Security Essentials Protection Engine dated 12-01-2021 SPDX-FileCopyrightText: 2021 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C ...

ALERT: North Korean hackers targeting South Korea with RokRat Trojan

A North Korean hacking group has been found deploying the RokRat Trojan in a new spear-phishing campaign targeting the South Korean government. Attributing the attack to APT37 aka Starcruft, Ricochet Chollima, or Reaper, Malwarebytes said it identified a malicious document last December that, whe...

Retrohunting APT37: North Korean APT used VBA self decode technique to inject RokRat

This post was authored by Hossein Jazi On December 7 2020 we identified a malicious document uploaded to Virus Total which was purporting to be a meeting request likely used to target the government of South Korea. The meeting date mentioned in the document was 23 Jan 2020, which aligns with the...

Digitally Signed Bandook Trojan Reemerges in Global Spy Campaign

A wave of targeted cyberattack campaigns bent on espionage is cresting around the globe, using a strain of a 13-year old backdoor trojan named Bandook. According to Check Point Research, Bandook was last spotted being used in 2015 and 2017/2018, in the “Operation Manul” and “Dark Caracal”...

CVE-2020-24436

Acrobat Pro DC versions 2020.012.20048 and earlier, 2020.001.30005 and earlier and 2017.011.30175 and earlier are affected by an out-of-bounds write vulnerability that could result in writing past the end of an allocated memory structure. An attacker could leverage this vulnerability to execute...

CVE-2020-24436: Out-of-bounds Write

Acrobat Pro DC versions 2020.012.20048 and earlier, 2020.001.30005 and earlier and 2017.011.30175 and earlier are affected by an out-of-bounds write vulnerability that could result in writing past the end of an allocated memory structure. An attacker could leverage this vulnerability to execute...

CVE-2020-24436

Acrobat Pro DC versions 2020.012.20048 and earlier, 2020.001.30005 and earlier and 2017.011.30175 and earlier are affected by an out-of-bounds write vulnerability that could result in writing past the end of an allocated memory structure. An attacker could leverage this vulnerability to execute...

Fake COVID-19 survey hides ransomware in Canadian university attack

This post was authored by Jérôme Segura with contributions from Hossein Jazi, Hasherezade and Marcelo Rivero. In recent weeks, weve observed a number of phishing attacks against universities worldwide which we attributed to the Silent Librarian APT group. On October 19, we identified a new phishi...

CVE-2020-16915

A memory corruption vulnerability exists when Windows Media Foundation improperly handles objects in memory. An attacker who successfully exploited the vulnerability could install programs; view, change, or delete data; or create new accounts with full user rights. There are multiple ways an...

The vulnerability of the Windows Media Foundation component in Windows operating systems allows attackers to install programs, view, modify, or delete data with the privileges of a legitimate user.

The vulnerability of the Windows Media Foundation component in Windows operating systems arises from operations that occur outside the buffer in memory. Exploiting this vulnerability allows a malicious actor to install programs, view, modify, or delete data with the privileges of a legitimate use...

CVE-2020-1339: Undefined Security Weakness

A remote code execution vulnerability exists when Windows Media Audio Codec improperly handles objects. An attacker who successfully exploited the vulnerability could take control of an affected system. There are multiple ways an attacker could exploit the vulnerability, such as by convincing a...

PYSEC-2020-71

In openapi-python-client before version 0.5.3, clients generated with a maliciously crafted OpenAPI Document can generate arbitrary Python code. Subsequent execution of this malicious client is arbitrary code execution...

PT-2020-3707 · Microsoft · Windows

Name of the Vulnerable Software and Affected Versions: Microsoft Windows affected versions not specified Description: The issue is related to errors in handling objects in memory within the DirectWrite API of Windows operating systems. This can allow a remote attacker to disclose protected...

CVE-2020-15900

A memory corruption issue was found in Artifex Ghostscript 9.50 and 9.52. Use of a non-standard PostScript operator can allow overriding of file access controls. The ‘rsearch’ calculation for the ‘post’ size resulted in a size that was too large, and could underflow to max uint32t. This was fixed...

Exploit for Improper Restriction of Operations within the Bounds of a Memory Buffer in Microsoft

PoC exploit for CVE-2017-11826, a Microsoft Office Word vulnerability allowing arbitrary code execution through DDE injection. The exploit targets Microsoft Office Word, specifically the vulnerability class of remote code execution RCE via DDE Dynamic Data Exchange injection. The probable entry...