PHP Reinfector and Backdoor Malware Target WordPress Sites
Understand the threat of PHP reinfector malware on WordPress sites, compromising plugins like Imagify and using malicious admin users.
HZ Rat backdoor for macOS harvests data from WeChat and DingTalk
Kaspersky experts discovered a macOS version of the HZ Rat backdoor, which collects user data from WeChat and DingTalk messengers.
CloudSorcerer APT uses cloud services and GitHub as C2 | Securelist
Kaspersky discovered a new APT CloudSorcerer targeting Russian government entities and using cloud services as C2, just like the CloudWizard actor.
XZ backdoor behavior inside OpenSSH
In this article, we analyze XZ backdoor behavior inside OpenSSH, after it has achieved RSA-related function hook.
Kaspersky analysis of the backdoor in XZ
Kaspersky analysis of the backdoor recently found in XZ, which is used in many popular Linux distributions and in OpenSSH server process.
Hackers exploit Ivanti SSRF flaw to deploy new DSLog backdoor
Hackers are exploiting a server-side request forgery (SSRF) vulnerability in Ivanti Connect Secure, Policy Secure, and ZTA gateways to deploy the new DSLog backdoor on vulnerable devices.
New RustDoor macOS malware impersonates Visual Studio update
A new Rust-based macOS malware spreading as a Visual Studio update to provide backdoor access to compromised systems uses infrastructure linked to the infamous ALPHV/BlackCat ransomware gang.
A backdoor with a cryptowallet stealer inside cracked macOS software
We review a new macOS backdoor that piggybacks on cracked software to replace Bitcoin and Exodus wallets with malware.
Analyzing DPRK's SpectralBlur
In both his twitter (err, X) thread and in a subsequent posting he provided a comprehensive background and triage of the malware dubbed SpectralBlur. In terms of its capabilities he noted: SpectralBlur is a moderately capable backdoor, that can upload/download files, run a shell, update its configuration, delete files, hibernate or sleep, based on commands issued from the C2. -Greg He also pointed out similarities to/overlaps with the DPRK malware known as KandyKorn (that we covered in our “Mac Malware of 2024” report), while also pointing out there was differences, leading him to conclude: We can see some similarities ... to the KandyKorn. But these feel like families developed by different folks with the same sort of requirements. -Greg
Trojanized Free Download Manager found to contain a Linux backdoor
Kaspersky researchers analyzed a Linux backdoor disguised as Free Download Manager software that remained under the radar for at least three years.
Fragments of Cross-Platform Backdoor Hint at Larger Mac OS Attack
During routine detection maintenance, our Mac researchers stumbled upon a small set of files with backdoor capabilities that seem to form part of a more complex malware toolkit. The following analysis is incomplete, as we are trying to identify the puzzle pieces that are still missing.
From RM3 to LDR4: URSNIF Leaves Banking Fraud Behind
A new variant of the URSNIF malware, first observed in June 2022, marks an important milestone for the tool. Unlike previous iterations of URSNIF, this new variant, dubbed LDR4, is not a banker, but a generic backdoor (similar to the short-lived SAIGON variant), which may have been purposely built to enable operations like ransomware and data theft extortion. This is a significant shift from the malware’s original purpose to enable banking fraud, but is consistent with the broader threat landscape.
MSSQL, meet Maggie. A novel backdoor for Microsoft SQL…
Continuing our monitoring of signed binaries, DCSO CyTec recently found a novel backdoor malware targeting Microsoft SQL servers. The malware comes in form of an “Extended Stored Procedure” DLL, a…
The SessionManager IIS backdoor: a possibly overlooked GELSEMIUM artefact
In early 2022, we investigated an IIS backdoor called SessionManager. It has been used against NGOs, government, military and industrial organizations in Africa, South America, Asia, Europe, Russia and the Middle East.
New SysJoker Backdoor Targets Windows, Linux, and macOS
In December 2021, we discovered a new multi-platform backdoor that targets Windows, Mac, and Linux that we have named SysJoker.
From RM3 to LDR4: URSNIF Leaves Banking Fraud Behind
A new variant of the URSNIF malware, first observed in June 2022, marks an important milestone for the tool. Unlike previous iterations of URSNIF, this new variant, dubbed LDR4, is not a banker, but a generic backdoor (similar to the short-lived SAIGON variant), which may have been purposely built to enable operations like ransomware and data theft extortion. This is a significant shift from the malware’s original purpose to enable banking fraud, but is consistent with the broader threat landscape.
MSSQL, meet Maggie. A novel backdoor for Microsoft SQL…
Continuing our monitoring of signed binaries, DCSO CyTec recently found a novel backdoor malware targeting Microsoft SQL servers. The malware comes in form of an “Extended Stored Procedure” DLL, a…
The SessionManager IIS backdoor: a possibly overlooked GELSEMIUM artefact
In early 2022, we investigated an IIS backdoor called SessionManager. It has been used against NGOs, government, military and industrial organizations in Africa, South America, Asia, Europe, Russia and the Middle East.
New SysJoker Backdoor Targets Windows, Linux, and macOS
In December 2021, we discovered a new multi-platform backdoor that targets Windows, Mac, and Linux that we have named SysJoker.
The SessionManager IIS backdoor: a possibly overlooked GELSEMIUM artefact
In early 2022, we investigated an IIS backdoor called SessionManager. It has been used against NGOs, government, military and industrial organizations in Africa, South America, Asia, Europe, Russia and the Middle East.
New SysJoker Backdoor Targets Windows, Linux, and macOS
In December 2021, we discovered a new multi-platform backdoor that targets Windows, Mac, and Linux that we have named SysJoker.