Mapstosteal

Overview

Executive Summary

Infection Vector and Technical Capabilities

• Targeted Harvesting: The malware is often custom-configured with specific file paths, database connection strings, or regular expressions to locate high-value assets (e.g., searching for `.sln` files, `web.config` files containing credentials, or CAD diagrams).
• Data Staging and Compression: To avoid triggering network Data Loss Prevention (DLP) alerts with massive, sudden transfers, the stealer quietly aggregates the stolen data into hidden staging directories and heavily compresses/encrypts it (often using custom algorithms or password-protected archives like 7zip or RAR).
• Covert Exfiltration: The staged data is then slowly exfiltrated out of the network. MapsToSteal often abuses legitimate cloud services (e.g., Dropbox, Mega, Google Drive APIs) or uses standard, encrypted protocols (HTTPS/TLS) to blend the exfiltration traffic with normal corporate web usage.

Threat Assessment

Incident Response and Remediation

• Halt Exfiltration Immediately (Network Segmentation): The absolute highest priority is to stop the data loss. Instantly sever the internet connection of the infected host and any staging servers identified. Implement strict egress filtering on the corporate firewall to block connections to known cloud storage providers or unauthorized IP addresses.
• Forensic Analysis of Staging Directories: Locate the hidden staging directories used by the malware to determine exactly what data was targeted and packaged for exfiltration. This is critical for regulatory breach notification and damage assessment.
• Enterprise-Wide Eradication: The presence of a specialized exfiltration tool means the attacker has deep access. A coordinated, enterprise-wide incident response effort is required to identify all compromised accounts, establish a new security perimeter, and completely rebuild all affected systems from bare metal.

Known aliases

Threat reports may refer to this family under multiple names:

• Trojan.MapsToSteal
• Spyware.DataExfil
• Infostealer.Targeted

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):

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:

rule MALWARE_WIN_MAPSTOSTEAL_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Mapstosteal"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "mapstosteal" ascii wide nocase
        $s2 = "trojan.mapstosteal" ascii wide nocase
        $s3 = "spyware.dataexfil" ascii wide nocase
        $s4 = "infostealer.targeted" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Mapstosteal (Trojan) Execution & Triage
id: 154dd803-61f2-54f0-8ec0-4a34ad2cfbf1
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Mapstosteal malware family. Detects suspicious execution from temporary
  user directories with hidden window flags and background transfer utilities.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/mapstosteal
- https://malware-families-catalog.systemhelpdesk.com/defensive/downloader-dropper-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.trojan
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1005
- attack.t1074
- attack.t1048_003
- attack.t1567
logsource:
  category: process_creation
  product: windows
detection:
  selection_process:
    Image|endswith:
    - \cmd.exe
    - \powershell.exe
    - \cscript.exe
    - \wscript.exe
    CommandLine|contains:
    - AppData\Local\Temp
    - -WindowStyle Hidden
    - /e:jscript
    - bitsadmin /transfer
  condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: medium

rule MALWARE_WIN_MAPSTOSTEAL_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Mapstosteal 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 = "mapstosteal" 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.

1. Sever network connectivity for the flagged endpoint to terminate persistent command-and-control (C2) communication channels and stop Mapstosteal from retrieving secondary stage payloads.
2. Capture process memory triage to detect and terminate malicious threads injected by Mapstosteal into legitimate system processes such as explorer.exe or svchost.exe.
3. Audit Windows Registry Run keys (HKCU\Software\Microsoft\Windows\CurrentVersion\Run) and Task Scheduler entries to locate and purge Mapstosteal persistence hooks.
4. Deploy updated enterprise EDR detection signatures and conduct an out-of-band endpoint scan to isolate dropped binaries and staged payloads.
5. Rotate all credentials, domain user passwords, and session cookies active on the system during the Mapstosteal execution timeframe.

What to Avoid

Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.

1. Do not assume the incident is resolved simply because an antivirus tool removed the initial Mapstosteal dropper; always verify that secondary payloads and persistence hooks have been eradicated.
2. Avoid logging in with Domain Admin or privileged credentials on a machine suspected of running Mapstosteal until memory triage is complete.
3. Do not delay host isolation; automated lateral movement and credential dumping can occur within minutes of initial execution.

References & External Analysis

• Search "mapstosteal" on VirusTotal (External Analysis)
• Search "mapstosteal" on Any.Run (Sandbox Sandbox)
• Search "mapstosteal" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Trojan)

Explore other documented threats in the same operational category:

• Detnat
• Ircfast
• Ramnif
• Midie
• Bunitu
• Luhn
• Alyak
• Vbcryptent

Machine-readable

Get this profile as JSON: https://malware-families-catalog.systemhelpdesk.com/api/mapstosteal.json

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.