{ "family": "globeimposter", "sample_count": 4, "category": "ransomware", "description": "Ransom:Win32/Globeimposter is a highly prevalent, aggressive crypto-ransomware family that became notorious for its devastating attacks on healthcare organizations, city governments, and enterprise networks. It is a 'Ransomware-as-a-Service' (RaaS) variant. The name 'GlobeImposter' originated because early versions explicitly copied the ransom note style and extension format of an earlier ransomware family called 'Globe', attempting to ride on its reputation.

Understanding GlobeImposter (Enterprise Ransomware)
To an end-user, a GlobeImposter attack is catastrophic: all files are encrypted, appended with unique extensions (like `.crypt`, `.doc`, `.707`, `.pscrypt`), and replaced with an HTML or TXT ransom note. For an enterprise, GlobeImposter is rarely a 'drive-by' infection. It is typically deployed manually by attackers ('hands-on-keyboard' attacks) who have already breached the network, escalated privileges, and disabled security tools, resulting in the simultaneous encryption of hundreds of servers.

Execution and Enterprise Encryption Mechanics
GlobeImposter operators frequently gain initial access by purchasing compromised Remote Desktop Protocol (RDP) credentials from Initial Access Brokers or brute-forcing internet-exposed RDP servers (`T1021.001`). Once inside, they use tools like Mimikatz to steal Domain Admin credentials (`T1003.001`) and move laterally (`T1550.002`). The ransomware payload itself is often deployed enterprise-wide via PsExec or Group Policy (`T1047`). Upon execution on a host, GlobeImposter uses a batch script (`.bat`) to aggressively delete Volume Shadow Copies and disable Windows Startup Repair (`vssadmin.exe Delete Shadows /All /Quiet`, `bcdedit /set {default} recoveryenabled No`) (`T1490`). It terminates database processes (SQL, Exchange) to ensure those files are unlocked and can be encrypted (`T1489`). It then encrypts files using RSA-2048 and AES-256 (`T1486`).

Indicators of Compromise & Impact
The impact is total operational paralysis and massive extortion demands. Host-based IoCs include EDR alerts for `vssadmin.exe` or `wmic.exe` executing shadow copy deletion commands, the sudden termination of critical database services, and massive spikes in disk I/O. The presence of specific file extensions and ransom notes (e.g., `how_to_back_files.html`) in every directory are definitive IoCs.", "cta": "Published by the SystemHelpdesk team.", "aliases": [], "enrichment_level": "expert-seo", "faq": [ { "@type": "Question", "name": "What is Globeimposter and what threat category does it belong to?", "acceptedAnswer": { "@type": "Answer", "text": "Globeimposter is classified as a Ransomware. Documented across security telemetry, it is engineered to execute unauthorized operations, establish persistent footholds on target endpoints, and facilitate malicious campaigns targeting enterprise and individual environments." } }, { "@type": "Question", "name": "How does Globeimposter establish persistence and evade defensive controls?", "acceptedAnswer": { "@type": "Answer", "text": "Globeimposter typically establishes persistence through registry run keys, scheduled tasks, or service installations, while evading signature-based antivirus solutions through code obfuscation, memory injection, or anti-analysis sandbox checks." } }, { "@type": "Question", "name": "What are the essential incident response steps for mitigating a Globeimposter compromise?", "acceptedAnswer": { "@type": "Answer", "text": "Security teams responding to Globeimposter should immediately isolate affected endpoints from the network, perform memory triage to capture volatile forensic artifacts, audit registry and startup persistence mechanisms, revoke exposed user credentials, and restore systems from verified, clean backups." } }, { "@type": "Question", "name": "What cryptographic algorithms and file targeting techniques does Globeimposter employ during execution?", "acceptedAnswer": { "@type": "Answer", "text": "Globeimposter typically leverages hybrid cryptographic architectures combining symmetric stream or block ciphers (such as AES-256 or ChaCha20) for rapid file encryption with asymmetric algorithms (such as RSA-2048 or Curve25519) to securely protect the session keys. It aggressively targets sensitive file extensions including corporate documents, databases, virtual disks, and backups while systematically executing commands to delete Volume Shadow Copies (vssadmin delete shadows /all /quiet) and disable system recovery options." } }, { "@type": "Question", "name": "Are decryptors available for Globeimposter, and what is the recommended recovery procedure?", "acceptedAnswer": { "@type": "Answer", "text": "Decryption availability for Globeimposter depends on whether security researchers or law enforcement (such as the No More Ransom initiative) have recovered the master private keys or discovered flaws in its key generation routines. Victims should never pay the extortion demand, as payment fuels criminal operations without guaranteeing file restoration. The recommended recovery procedure entails isolating infected hosts, conducting forensic disk imaging, identifying the root access vector, and restoring validated systems from immutable offline backups." } } ], "faq_count": 5, "mitre_attack": [ "T1021.001", "T1489", "T1490", "T1486" ], "cisa_advisory": null, "last_updated": "2026-06-09", "mitre_attack_detail": [ { "id": "T1486", "name": "Data Encrypted for Impact", "tactic": "Impact" }, { "id": "T1490", "name": "Inhibit System Recovery (Deleting Shadow Copies & Disabling Recovery)", "tactic": "Impact" }, { "id": "T1489", "name": "Service Stop (Terminating SQL/Exchange to unlock files)", "tactic": "Impact" }, { "id": "T1021.001", "name": "Remote Services: Remote Desktop Protocol (Primary initial access vector)", "tactic": "Initial Access" } ], "containment_steps": [ "Immediately physically disconnect all compromised and highly suspect servers from the network (pull the Ethernet cable) to halt the lateral deployment of the encryptor.", "Identify the initial point of entry (usually a compromised VPN account or an exposed RDP server) and disable the associated account/service immediately.", "Do NOT reboot infected servers; capture a live memory image (RAM dump), as there have been historical flaws in certain GlobeImposter variants where keys could be recovered from memory.", "Initiate a full enterprise-wide password reset, specifically targeting Domain Admin and service accounts, as the attackers likely hold complete control of Active Directory." ], "what_to_avoid": [ "Do not pay the ransom without consulting professional incident response firms; paying funds criminal syndicates, and decryptors provided by GlobeImposter operators are notoriously buggy and often corrupt large files.", "Avoid reconnecting restored servers to the network until the root cause (e.g., the open RDP port) has been permanently secured." ], "target_industries": [ "Healthcare", "Critical Infrastructure", "Enterprise" ], "motivation": "Financial Extortion", "threat_actors": [ "Unknown / Cybercriminal" ], "target_geographies": [ "Global" ], "attack_stage": [ "defense_evasion", "impact" ], "ecosystem": [ "windows_pe" ], "is_emerging": false, "target_platforms": [ "Windows 11", "Windows 10", "Windows Server 2022", "Windows Server 2019" ] }