TLP:WHITE The following information is being provided by the FBI, with no 23 March 2021 guarantees or warranties, for potential use at the sole discretion of recipients in order to protect against cyber threats. This data is Alert Number provided to help cyber security professionals and system CU-000143-MW administrators’ guard against the persistent malicious actions of cyber actors. This FLASH was coordinated with DHS-CISA. WE NEED YOUR This FLASH has been released TLP:WHITE. Subject to standard HELP! copyright rules, TLP:WHITE information may be distributed without If you find any of restriction. For comments or questions related to the content or these indicators on dissemination of this product, contact CyWatch. your networks, or have related information, please Mamba Ransomware Weaponizing DiskCryptor contact FBI CYWATCH Summary immediately. Mamba ransomware has been deployed against local governments, Email: public transportation agencies, legal services, technology services,
[email protected] industrial, commercial, manufacturing, and construction businesses. Mamba ransomware weaponizes DiskCryptor—an open source full Phone: disk encryption software— to restrict victim access by encrypting an 1-855-292-3937 entire drive, including the operating system. DiskCryptor is not inherently malicious but has been weaponized. Once encrypted, the *Note: By reporting any related system displays a ransom note including the actor’s email address, information to FBI CyWatch, ransomware file name, the host system name, and a place to enter the you are assisting in sharing decryption key. Victims are instructed to contact the actor’s email information that allows the FBI address to pay the ransom in exchange for the decryption key.