Not-So-Common, Common-Sense Security: Insecure Password Storage
⚠️ Legal & Ethical Disclaimer
The information presented in this post is provided for educational and informational purposes only. All techniques, tools, and examples discussed are intended to be used only in environments you own or have explicit authorization to test.
The author assumes no responsibility or liability for any misuse of the information contained herein. You are solely responsible for ensuring that your actions comply with applicable laws, regulations, and organizational policies.
Overview
Despite years of security awareness training and technical safeguards, cleartext passwords remain widespread throughout enterprise environments. These credentials are rarely stored maliciously. Instead, they are distributed across documents, directory services, scripts, and configuration files as a byproduct of daily operations.
What makes this issue particularly dangerous is not just where the passwords are stored, but the assumptions made about who can access them. Files, shares, and directory attributes that appear private or low risk often turn out to be accessible to far more users or systems than intended.
From an attacker’s perspective, insecure password storage is often a fast path to compromise.
The Human Element: Convenience vs. Security
End-users often face password fatigue. With dozens of applications to manage, individuals frequently resort to storing credentials in familiar tools like Microsoft Word, Excel, or simple text files.
The logic behind this is usually rooted in productivity; users need a way to keep track of complex credentials. These files are typically stored in locations the user perceives as private, such as a personal folder on a network share or a departmental drive.
The risk emerges when perception does not match reality. In many environments, access to these locations is governed by inherited permissions from parent folders or broad group memberships. Over time, access accumulates as users change roles, groups are reused, or shares are repurposed—a phenomenon commonly referred to as permission creep. As a result, files that were originally intended for a single individual or team may become accessible to a much wider audience without anyone explicitly granting that access.
What appears to be a private document is often anything but.
Technical Debt: Service Accounts and Active Directory
It isn’t just end-users who contribute to this risk. IT professionals and system administrators often store credentials for service accounts or generic setup accounts within Active Directory attributes.
A common practice involves placing passwords or initial setup credentials in the Description, Notes, or Comments fields of a User or Computer Object. While this may seem like a convenient way to keep track of a service account's purpose, it creates a significant security gap. Because these attributes are part of the directory, they can be queried by any authenticated user in the domain. What was intended as a helpful note for a fellow admin becomes a globally readable credential for anyone on the network.
Hardcoded Credentials in Scripts and Configs
In the world of automation, credentials often end up hardcoded directly into Configuration Files (.config, .sql, .xml, .yaml) or Automation Scripts (.bat, .ps1, .sh, .py).
When an application needs to authenticate to a database or a script needs to run a scheduled task, hardcoding the password is often a quick fix during development that inadvertently makes it into production. These files frequently reside on application servers or internal code repositories where access controls are looser than intended.
Remediation: Cleaning Up the Environment
Solving the problem of cleartext passwords requires a two-pronged approach: one focused on the general workforce and one aimed at technical and administrative staff. Addressing only one side of the problem leaves gaps that convenience, legacy processes, or technical debt will quickly reopen.
For the Enterprise User
Enterprise Password Managers:
Organizations should provide a managed enterprise password manager to eliminate the perceived need for spreadsheets and text files. Solutions such as 1Password Business, keeper, Dashlane, or similar platforms give users a secure, encrypted vault while maintaining administrative visibility and control. When users are provided with an approved tool, insecure workarounds become far less common.
Targeted Awareness:
Security training should move beyond generic messaging and address the risks of convenience storage. Users should understand how permission inheritance works, why access to files and folders can expand over time, and how private locations may still be accessible to others within the organization. This context helps users make better decisions without relying solely on policy enforcement.
For the IT and Development Staff
Secrets Management:
Technical teams should transition away from hardcoded credentials by using centralized secrets management solutions such as Azure Key Vault, HashiCorp Vault, or AWS Secrets Manager. These platforms allow applications and services to retrieve credentials at runtime without storing them on disk or embedding them in source code.
Managed Service Accounts (gMSA):
Where possible, Group Managed Service Accounts should be used for Windows services. gMSAs automatically manage and rotate complex passwords, removing the need for administrators to record credentials or store them in Active Directory attributes such as Description or Notes fields.
Automated Scanning:
Organizations should leverage secret scanning tools to proactively identify cleartext credentials in file shares, scripts, and code repositories. Regular scanning helps detect insecure storage early, reducing the likelihood that exposed credentials remain undiscovered and exploitable for extended periods
MITRE ATT&CK Mapping
Insecure password storage is a primary driver for several techniques within the MITRE ATT&CK framework. Understanding this mapping helps teams visualize how stored secrets move a risk from theoretical to actionable.
| Tactic | Technique | ID | Description |
| Discovery | Account Discovery | T1087 | Enumerating user and group accounts to find high-value targets. |
| Discovery | File and Directory Discovery | T1083 | Searching for files and shares that may contain cleartext secrets. |
| Credential Access | Unsecured Credentials | T1552 | Searching for credentials stored in files, scripts, or environmental variables. |
| Credential Access | Credentials in Files | T1552.001 | Finding passwords in Word, Excel, and Text documents. |
| Discovery | Permission Groups Discovery | T1069 | Identifying security groups to see who has access to sensitive shares. |
Final Thoughts
Insecure password storage is rarely a technical failure it is a visibility failure. Organizations often underestimate how widely accessible internal data truly is.
If you take nothing else away from this post:
Assume that any file, share, or directory attribute you can access is likely accessible to more users than intended.
Eliminate cleartext credentials from documentation, scripts, and directory services—especially Active Directory attributes.
Provide approved tools, such as password managers and secrets vaults, so convenience does not drive insecure behavior.
Closing the gap between assumption and reality removes one of the most common—and preventable—paths to compromise.