Threats Tagged 'command and control'

Recent activity has been detected linked to the Sidewinder advanced persistent threat group. The campaign utilizes a malicious document named No.9374.docx with the hash value 64f2681ad0940e6c2c9c76e6834117bf as a lure mechanism. The infrastructure supporting command and control operations includes the domain update[.]ms-office[.]app. This observation indicates ongoing operations by Sidewinder, a threat actor known for targeting specific regions and sectors. The use of weaponized documents and deceptive domains mimicking legitimate Microsoft services demonstrates continued sophisticated social engineering tactics employed by this group.

Zscaler ThreatLabz identified a new command-and-control framework implant called SnappyClient, delivered via HijackLoader. SnappyClient is a C++-based implant with data theft and remote access capabilities. It employs evasion techniques like AMSI bypass, Heaven's Gate, direct system calls, and transacted hollowing. The malware receives configuration files from its C2 server and uses a custom encrypted network protocol. SnappyClient's main functions include stealing browser data, taking screenshots, keylogging, and providing remote shell access. Analysis suggests potential ties to HijackLoader based on code similarities. The primary goal appears to be cryptocurrency theft, targeting wallet addresses and crypto-related applications.

MediumMalwareUnited StatesChinaRussia+7#hijackloader#cryptocurrency#snappyclient

A recent supply chain attack targeting EmEditor users has been uncovered, involving watering hole tactics. The investigation reveals multiple domains masquerading as EmEditor-related sites, all registered through NameSilo LLC in December 2025. The domains resolve to various IP addresses, with some changes observed in February 2026. Additional domains with similar patterns were discovered, along with peculiar HTTP header behavior. A potential early stage of the campaign was identified, sharing similar characteristics with the initial report. The attackers continued their activities even after exposure, utilizing PowerShell scripts and various domains for command and control purposes. The analysis provides a comprehensive list of indicators, including domain names, IP addresses, and file hashes associated with the attack.

MediumCampaignGermanyFranceUnited Kingdom+3#powershell#supply chain attack#emeditor

PhantomCore, a hacking group targeting Russian and Belarusian companies since 2022, launched a new wave of malicious email campaigns on January 19 and 21, 2026. The attacks targeted various sectors including utilities, finance, urban infrastructure, aerospace, consumer digital services, chemical industry, construction, consumer goods manufacturing, and e-commerce. The campaign used phishing emails with malicious attachments, leveraging compromised legitimate email addresses. The malware operates in multiple stages, including downloading decoy documents, executing PowerShell scripts, and establishing persistence through scheduled tasks. The second stage malware, similar to previously known PhantomCore.PollDL, communicates with command and control servers to receive and execute commands.

MediumMalwareRussiaBelarus#russian targets#powershell#phishing

A persistent nine-month RondoDoX botnet campaign has been targeting IoT devices and web applications. The threat actors have recently shifted to weaponizing a critical Next.js vulnerability, deploying malicious payloads like 'React2Shell' and cryptominers. The campaign, spanning from March to December 2025, shows quick adaptation to latest attack trends. The activity is divided into three phases: initial reconnaissance, web application exploitation, and IoT botnet deployment. The attackers have been using multiple command and control servers and deploying various malware variants. The campaign has intensified in December 2025 with a focus on Next.js exploitation. The impact includes widespread IoT device compromise, Next.js application risks, credential harvesting, and persistent multi-architecture threats.

MediumCampaignGermanyFranceUnited Kingdom+5#rondodox#command and control#rondo

A new malware campaign called EvilAI is spreading globally by disguising itself as legitimate AI-enhanced productivity tools. The malware uses AI-generated code and professional interfaces to evade detection, targeting organizations across sectors like manufacturing, government, and healthcare. It exploits Node.js to execute malicious JavaScript, establishes persistence through scheduled tasks and registry modifications, and communicates with command-and-control servers using encrypted channels. EvilAI enumerates installed software, terminates browser processes, and duplicates credential data. It employs sophisticated obfuscation and anti-analysis techniques to hinder reverse engineering. The malware acts as an initial access vector, potentially deploying additional payloads. This campaign highlights how AI is being weaponized to create increasingly stealthy and adaptive malware threats.

MediumMalwareFranceGermanyItaly+1#ai-generated code#node.js#evilai

A detailed analysis of a malicious PDF editor application called AppSuite PDF Editor reveals it to be a sophisticated backdoor. The software, masquerading as a legitimate productivity tool, is distributed through high-ranking websites. Once installed, it creates scheduled tasks and establishes persistence mechanisms. The backdoor communicates with command and control servers, allowing threat actors to execute arbitrary commands, exfiltrate data, and manipulate browser settings. It specifically targets Chromium-based browsers and other applications like Wave browser, Shift browser, and OneLaunch. The malware employs advanced techniques such as AES encryption, custom obfuscation, and event logging to evade detection. The analysis concludes that AppSuite PDF Editor is definitively malicious and should be classified as a trojan horse with backdoor capabilities.

MediumMalwareGermanyFranceUnited Kingdom+4#backdoor#scheduled tasks#command and control

A malicious campaign utilizing VenomRAT, a Remote Access Trojan, is analyzed. The attackers use a fake Bitdefender download website to spread malware, including VenomRAT, StormKitty, and SilentTrinity. These tools work together to provide initial access, steal credentials, and maintain long-term hidden access. The campaign's infrastructure includes multiple command and control servers and phishing sites impersonating banks and IT services. The analysis reveals the attackers' focus on harvesting financial credentials and crypto wallets while establishing persistent access for potential exploitation or sale. This campaign highlights the growing trend of sophisticated, modular malware built from open-source components, posing a significant threat to everyday internet users.

MediumMalwareGermanyUnited KingdomFrance+4#remote access trojan#silenttrinity#phishing

AsyncRAT, a remote access trojan known since 2019, has been rewritten in Rust, marking a shift from its original C# implementation. This change aims to complicate reverse engineering efforts due to limited analysis tool support for Rust. The malware retains its core functionality, including plugin installation, code execution, and persistence. It installs via scheduled tasks or temporary directory copying, stores plugins in the registry, and communicates with command and control servers over TLS. The Rust variant supports fewer commands compared to its .NET counterpart, suggesting ongoing development. The malware collects system information, including hardware ID, OS details, and antivirus software presence. Debug strings in the samples indicate active development of this Rust version.

MediumMalwareGermanyFranceNetherlands+4#reverse engineering#command and control#system information