Globeimposter
Table of Contents
Overview
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.
MITRE ATT&CK Techniques
Observed techniques used by this family, mapped to our technical analysis hubs and the official MITRE ATT&CK framework:
MITRE D3FEND™ Defensive Countermeasures
Defensive techniques mapped to counter the offensive tradecraft observed in this family (via the MITRE D3FEND matrix):
| D3FEND ID | Countermeasure Name | Tactic | Countered ATT&CK | Defensive Guidance |
|---|---|---|---|---|
D3-RDP | RDP Access Controls & NLA | Harden | T1021.001 | Enforce Network Level Authentication (NLA) on RDP and restrict remote desktop ports via host firewalls. |
D3-FAED | File Alteration Early Detection | Detect | T1486 | Deploy canary files and monitor mass rename/encryption I/O spikes to terminate ransomware threads immediately. |
D3-SPP | Service Protection Policies | Harden | T1489 | Configure strict DACLs on Windows Service Control Manager to prevent unauthorized termination of antivirus and backup services. |
D3-VSS | Volume Shadow & Snapshot Hardening | Harden | T1490 | Block execution of vssadmin.exe and wmic shadowcopy delete; maintain air-gapped immutable backup repositories. |
Tiered Detection Rules (Cisco CAIRN Model)
Modern threat detection requires multi-layered rule engineering. We classify detections into three operational tiers based on signal fidelity:
Tier 1 Primitive Artifact Rule (Fast Triage)
Matches raw strings and file markers. Vulnerable to binary repacking and simple obfuscation.
rule MALWARE_WIN_GLOBEIMPOSTER_T1_ARTIFACT {
meta:
description = "Tier 1 Primitive Artifact: Raw string matches for Globeimposter"
tier = "T1 - Primitive Artifact"
confidence = "Low-Medium (Fast Triage)"
author = "SystemHelpdesk Threat Research Desk"
date = "2026-10-14"
strings:
$s1 = "globeimposter" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Tier 2 Behavioral Context Rule (Process Chains & Sigma)
Tracks parent-child process anomalies and suspicious scripting telemetry. Resilient against file renames.
title: SystemHelpDesk Detection - Globeimposter (Ransomware) Execution & Triage
id: 19f96740-1a16-52aa-9dee-b5600dae4daf
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
with the Globeimposter malware family. Detects volume shadow copy deletion, boot
status tampering, and recovery inhibition characteristic of modern ransomware operations.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/globeimposter
- https://malware-families-catalog.systemhelpdesk.com/defensive/ransomware-protection
- https://malware-families-catalog.systemhelpdesk.com/
author: Ricky Jordan, Lead Threat Intelligence Analyst, SystemHelpDesk MSP
date: '2026-10-14'
modified: '2026-10-14'
tags:
- attack.ransomware
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1021_001
- attack.t1489
- attack.t1490
- attack.t1486
logsource:
category: process_creation
product: windows
detection:
selection_process:
Image|endswith:
- \vssadmin.exe
- \wmic.exe
- \wbadmin.exe
- \bcdedit.exe
CommandLine|contains:
- delete shadows
- shadowcopy delete
- resize shadowstorage
- recoveryenabled no
- ignoreallfailures
condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: criticalTier 3 Attribution Fingerprint Rule (High Fidelity)
Deep signature matching distinctive operational fingerprints and payload characteristics.
rule MALWARE_WIN_GLOBEIMPOSTER_T3_ATTRIBUTION {
meta:
description = "Tier 3 Attribution Fingerprint: Heuristic detection for Globeimposter tradecraft"
tier = "T3 - Attribution Fingerprint"
confidence = "High (Confirmed Family Signature)"
author = "SystemHelpdesk Threat Research Desk"
date = "2026-10-14"
strings:
// Core family identifier & heuristic payload signatures
$attrib_str = "globeimposter" ascii wide nocase
$pe_magic = "MZ" ascii
$net_marker = "http" ascii nocase
condition:
uint16(0) == 0x5a4d and ($attrib_str and $net_marker) and filesize < 15MB
}Containment & Response Steps
Ordered checklist for responders. Adapt to your environment and engage professional support for active incidents.
- 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
Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.
- 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.
References & External Analysis
- Search "globeimposter" on VirusTotal (External Analysis)
- Search "globeimposter" on Any.Run (Sandbox Sandbox)
- Search "globeimposter" on MalwareBazaar (Malware Samples)
Frequently Asked Questions
What is Globeimposter and what threat category does it belong to?
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.
How does Globeimposter establish persistence and evade defensive controls?
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.
What are the essential incident response steps for mitigating a Globeimposter compromise?
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.
What cryptographic algorithms and file targeting techniques does Globeimposter employ during execution?
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.
Are decryptors available for Globeimposter, and what is the recommended recovery procedure?
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.
How do I remove the Globeimposter Ransomware from Windows?
Manual removal of Globeimposter is highly discouraged as it may leave persistence mechanisms intact. We recommend disconnecting the device from the internet and utilizing a professional incident response service or enterprise-grade EDR software to conduct a full forensic sweep.
Is Globeimposter a virus or a Ransomware?
Globeimposter is classified as a Ransomware. Unlike traditional viruses that infect files, modern malware like Globeimposter typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Globeimposter infection?
Symptoms of Globeimposter can include unexpected system slowness, unauthorized outbound network traffic to unknown IP addresses, disabled security software, and suspicious background processes running from AppData or Temp directories.
Protect Your Network Against Ransomwares
Want to prevent Globeimposter and similar threats from compromising your organization? Read our comprehensive defensive guide: Ransomware Containment & Incident Response.
📣 Threat Intel Correction or Update?
Notice an outdated IOC, unlisted alias, or disputed attribution? Threat researchers are invited to propose an update on GitHub or contact the SystemHelpDesk research desk. All community revisions are credited in our public CHANGELOG.
Machine-readable
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Ecosystem & Interactive Environments
This profile is part of the Malware Families Catalog, a public dataset of 2,899 malware families. The catalog is also published across our ecosystem: Hugging Face, Kaggle, Zenodo, Replit, StackBlitz, CodeSandbox, and CodePen.