PUP.MSIL.Rostpay.A
PUP.MSIL.Rostpay.A is a detection for a potentially unwanted program (PUP) built on the Microsoft .NET (MSIL) framework. Programs in this category are flagged not because they are aggressive malware, but because they exhibit behavior users generally do not want — such as installing without clear consent, bundling extra components, or accessing data and system resources beyond what their stated purpose requires.
Behavioral analysis of a sample under this detection shows user-data access, encryption use, and anti-debugging activity — a mix that is more secretive than a typical harmless utility, which is why it is flagged for review. Files flagged under this detection are typically unsigned.
Table of Contents
What Is a PUP?
A potentially unwanted program sits in the gray area between legitimate software and outright malware. It may arrive bundled with other downloads, run background processes, collect information, or make changes to a system that the user did not knowingly approve. Even when not overtly malicious, PUPs waste resources and can weaken privacy and security.
How It Spreads
PUPs of this kind commonly spread through software bundling, download portals, and misleading advertisements. Rushing through an installer with default settings is the most common way they end up on a system.
Potential Concerns
- Unwanted installation: may arrive alongside other software without clear disclosure.
- Data access: observed behavior includes reaching into user data.
- Evasion traits: anti-debugging activity is unusual for benign utilities.
Symptoms
- An unfamiliar program running in the background.
- Software installed without a clear record of you choosing it.
- Minor performance or privacy concerns.
Why This Detection Matters
PUPs that behave secretively deserve scrutiny: at best they are unwanted clutter, and at worst they shade into spyware. Removing anything you did not intentionally install keeps your system clean and your data private.
How to Remove PUP.MSIL.Rostpay.A
Because this threat runs as a file-based Windows infection, removal has two goals: stop the malicious process and delete every component it dropped, then confirm nothing was left behind to reinstall it.
Manual Steps
- Disconnect the computer from the internet to cut the malware off from its command-and-control server.
- Restart Windows in Safe Mode with Networking so the threat is not loaded at startup.
- Open Task Manager and end any unfamiliar or suspicious background processes.
- Check Settings → Apps and uninstall any program you do not recognize or did not intentionally install.
- Review startup entries (Task Manager → Startup) and the
Runregistry keys for entries that point to random file names in temporary folders. - Review recently installed programs and browser extensions, and remove anything you do not recognize.
- Clear temporary files to remove staging copies of the payload.
Recommended: Run a Full Malware Scan
Manual removal is difficult because modern threats hide components and can restore themselves. The most reliable way to fully remove PUP.MSIL.Rostpay.A and any additional malware it may have downloaded is to scan the system with a professional, up-to-date anti-malware tool such as SpyHunter. A complete scan will detect and remove the threat's files, registry entries, and related infections, helping restore the device to a clean, secure state.
Conclusion
PUP.MSIL.Rostpay.A flags a .NET program whose behavior is more secretive than a harmless tool should be. If you did not deliberately install it, remove it and scan the system with a trusted security tool to confirm nothing else came along with it.
Analysis Report
General information
| Family Name: | PUP.MSIL.Rostpay.A |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
062866979189b4a4f7e40a4005d39d7d
SHA1:
c6563260ed4b958659930672fb8e16443ba690d8
SHA256:
BDB89C4FD35DA8A90BE33AECA55B5EB8F82CEF34EBD64B56E803B335C991284A
File Size:
826.37 KB, 826368 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have debug information
- File doesn't have exports table
- File doesn't have security information
- File is .NET application
- File is 32-bit executable
- File is either console or GUI application
- File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
- File is not packed
- IMAGE_FILE_DLL is not set inside PE header (Executable)
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- IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)
File Icons
File Icons
This section displays icon resources found within family samples. Malware often replicates icons commonly associated with legitimate software to mislead users into believing the malware is safe.
Windows PE Version Information
Windows PE Version Information
This section displays values and attributes that have been set in the Windows file version information data structure for samples within this family. To mislead users, malware actors often add fake version information mimicking legitimate software.| Name | Value |
|---|---|
| Assembly Version | 4.5.6.0 |
| Company Name | ОБЩЕСТВО С ОГРАНИЧЕННОЙ ОТВЕТСТВЕННОСТЬЮ РОСТПЭЙ |
| File Description | DriverHub Installer |
| File Version | 4.5.6.0 |
| Internal Name | DriverHubInstaller.exe |
| Legal Copyright | © ОБЩЕСТВО С ОГРАНИЧЕННОЙ ОТВЕТСТВЕННОСТЬЮ РОСТПЭЙ. All rights reserved. |
| Original Filename | DriverHubInstaller.exe |
| Product Name | DriverHub |
| Product Version | 4.5.6.0 |
File Traits
- .NET
- Installer Version
- x86
Block Information
Block Information
During analysis, EnigmaSoft breaks file samples into logical blocks for classification and comparison with other samples. Blocks can be used to generate malware detection rules and to group file samples into families based on shared source code, functionality and other distinguishing attributes and characteristics. This section lists a summary of this block data, as well as its classification by EnigmaSoft. A visual representation of the block data is also displayed, where available.| Total Blocks: | 2,165 |
|---|---|
| Potentially Malicious Blocks: | 1,088 |
| Whitelisted Blocks: | 956 |
| Unknown Blocks: | 121 |
Visual Map
? - Unknown Block
x - Potentially Malicious Block
Windows API Usage
Windows API Usage
This section lists Windows API calls that are used by the samples in this family. Windows API usage analysis is a valuable tool that can help identify malicious activity, such as keylogging, security privilege escalation, data encryption, data exfiltration, interference with antivirus software, and network request manipulation.| Category | API |
|---|---|
| User Data Access |
|
| Encryption Used |
|
| Anti Debug |
|
