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WhiteLock ransomware has been identified targeting Windows systems, encrypting files and appending the .Fbin extension before dropping a ransom note named c0ntact.Txt and changing the victim’s wallpaper to increase pressure to pay. During execution, the malware contacts an external server, derives a victim identifier by hashing the device’s MAC address, retrieves an RSA public key, and encrypts files with AES-CBC while protecting the AES key with RSA-2048.
The operation also attempts to hinder containment by checking for AnyDesk and TeamViewer and terminating their services while encryption is underway. The ransom note claims both file encryption and data theft, threatens to publish or sell stolen data if payment is not made, and directs victims to a Tor-based negotiation page. Reporting also links WhiteLock activity to campaigns where information-stealing malware was used for initial access before ransomware deployment, underscoring the need to monitor abnormal outbound connections, remote access tool activity, mass file changes, ransom note creation, and service termination behavior.
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AhnLab ASEC published an analysis describing WhiteLock as a Windows ransomware strain that appends the .Fbin extension, drops a ransom note named c0ntact.Txt, changes the victim wallpaper, contacts an external server for an RSA public key, and terminates AnyDesk and TeamViewer services during encryption. The report also noted ransom-note claims of data theft and links to campaigns where information-stealing malware was used for initial access before ransomware deployment.
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Acronis Threat Research Unit reported active campaigns using **LockBit 5.0**, a major update to the **LockBit** ransomware-as-a-service (RaaS) operation that broadens targeting across **Windows, Linux, and VMware ESXi** in coordinated intrusions. The variant continues **double extortion** (data theft plus encryption) and is positioned for enterprise impact by enabling attackers to hit endpoints, servers, and hypervisors—where a single ESXi compromise can disrupt many virtual machines at once. Reporting also notes the group’s claimed ability to operate against **Proxmox** virtualization environments, further expanding the potential attack surface in organizations adopting alternative hypervisors. Technical analysis highlights stronger and more enterprise-focused builds, with the **Windows** payload using advanced defense-evasion and anti-analysis techniques such as packing/obfuscation, **DLL unhooking**, **process hollowing**, and **ETW (Event Tracing for Windows) patching**, alongside log-clearing to reduce forensic visibility. The **Linux/ESXi** builds are described as less reliant on packing but use extensive string encryption to hinder detection, while maintaining strong encryption routines and using randomized file extensions; Acronis-linked reporting also cites faster encryption and continuity with LockBit 4’s design. Victimology cited in coverage indicates a heavy focus on the **U.S. business sector** and a broad spread across industries (including manufacturing, healthcare, education, financial services, and government), with dozens of recent leak-site postings used to pressure victims and demonstrate ongoing operational tempo despite law-enforcement disruption efforts.
Jun 29, 2026
Sophos reported that the **WantToCry** ransomware is targeting internet-exposed SMB services on ports `139` and `445`, using weak, brute-forced, or stolen credentials to access shared files without deploying malware on the victim host. Instead of encrypting data locally, the attackers copy files over authenticated SMB sessions to attacker-controlled servers, encrypt them remotely, and write the encrypted versions back to the original shares, appending the `.want_to_cry` extension and dropping ransom notes such as `!want_to_cry.txt` or `!Want_To_Cry.txt`. The notes direct victims to qTox or Telegram and typically demand about **$600 in Bitcoin**. Researchers said the technique reduces traditional endpoint detection opportunities because it leaves few host-based artifacts and relies on seemingly normal SMB file operations, though network and authentication traces remain visible. Sophos linked the activity to infrastructure in **Russia, Germany, the United States, and Singapore**, including systems previously associated with **NetSupport RAT** and **LockBit, Qilin, and ALPHV/BlackCat** activity, while noting the ransomware is unrelated to the 2017 **WannaCry** worm despite the similar name. The company said the attacks appear focused on hosts exposing SMB rather than broad enterprise-wide deployment and urged organizations to block inbound SMB, disable **SMBv1** and anonymous access, monitor unusual external SMB activity, and protect backups from SMB-based access.
Jun 29, 2026
LockBit 5.0 has emerged as the latest evolution of the notorious ransomware-as-a-service operation, introducing sophisticated encryption algorithms and advanced anti-analysis techniques that significantly complicate detection and recovery efforts for targeted organizations. The malware now employs a combination of ChaCha20-Poly1305 for file encryption and X25519 with BLAKE2b for secure key exchange, while also terminating Volume Shadow Copy Service processes to prevent system recovery. LockBit 5.0’s runtime flexibility allows it to operate even without specific parameters, and its use of advanced packing and obfuscation further hinders static analysis by security professionals. Despite increased law enforcement pressure, LockBit has sustained its position as a dominant global ransomware threat, accounting for a substantial share of attacks worldwide. The group’s operations have impacted a wide range of sectors, including IT, electronics, law firms, and religious institutions, resulting in billions of dollars in ransom payments and recovery costs. LockBit continues to leverage its dark web platform to publicly list compromised organizations and stolen data, using these tactics to pressure victims into paying ransoms.
Jun 29, 2026