Adware.Go.Agent.B
Threat Scorecard
EnigmaSoft Threat Scorecard
EnigmaSoft Threat Scorecards are assessment reports for different malware threats which have been collected and analyzed by our research team. EnigmaSoft Threat Scorecards evaluate and rank threats using several metrics including real-world and potential risk factors, trends, frequency, prevalence, and persistence. EnigmaSoft Threat Scorecards are updated regularly based on our research data and metrics and are useful for a wide range of computer users, from end users seeking solutions to remove malware from their systems to security experts analyzing threats.
EnigmaSoft Threat Scorecards display a variety of useful information, including:
Popularity Rank: The ranking of a particular threat in EnigmaSoft’s Threat Database.
Severity Level: The determined severity level of an object, represented numerically, based on our risk modeling process and research, as explained in our Threat Assessment Criteria.
Infected Computers: The number of confirmed and suspected cases of a particular threat detected on infected computers as reported by SpyHunter.
See also Threat Assessment Criteria.
| Threat Level: | 20 % (Normal) |
| First Seen: | July 1, 2021 |
| Last Seen: | October 27, 2026 |
| OS(es) Affected: | Windows |
Adware.Go.Agent.B is an adware program that targets Windows computers. It is built using the Go programming language and packed with a UPX compressor, a technique often used to shrink file size and make the program harder for security tools to analyze. While its danger level is considered low, it can still disrupt the browsing experience and compromise a user's privacy.
Table of Contents
What Adware.Go.Agent.B Does
Like other programs in the Adware category, Go.Agent.B is designed to automatically display or download advertisements on an infected computer. These ads can show up as pop-up windows, injected banners inside a web browser, unwanted toolbars, or promotions within an ad-supported application. The purpose of this activity is to generate advertising revenue for whoever controls the adware, often with little regard for how it affects the user's system performance or browsing experience.
Beyond simply showing ads, adware of this type typically monitors a user's web browsing habits, including sites visited and ad interaction data. This information can then be transmitted to third parties, allowing them to build a profile of the user and deliver more "targeted" advertising. The sample analyzed also creates files in temporary folders and makes network connections, behavior consistent with downloading additional ad content or communicating with remote servers.
How It Usually Gets Onto Computers
Adware such as Go.Agent.B commonly spreads by being bundled with free software, including games, emoticon packs, file-sharing tools, and screensavers. Users who download free applications from unofficial or ad-heavy websites may unknowingly install this adware alongside the program they actually wanted, especially if they rush through the installation process without reviewing each step or opting out of extra "offers."
Risks for the User
Although classified as low risk, Go.Agent.B can still create real problems for users. Constant pop-ups and injected ads can slow down browsing and make the computer frustrating to use. The tracking of browsing habits and transmission of that data to third parties raises privacy concerns, as users generally have no control over who receives this information or how it is used. In some cases, adware like this can also act as a gateway, exposing users to further unwanted downloads or deceptive advertisements that lead to other questionable software.
Signs of Infection
- Frequent pop-up ads appearing even when no browser is open
- New toolbars or browser extensions that were not intentionally installed
- Unexpected redirects to advertising or promotional websites
- Unfamiliar executable files appearing in temporary folders
- Noticeably slower system or browser performance
How to Stay Protected
To reduce the risk of picking up adware like Go.Agent.B, download software only from official or trusted sources, and always choose "custom" or "advanced" installation options so you can review and deselect any bundled extras. Keep your operating system and browser updated, and periodically review installed programs and browser extensions for anything unfamiliar. Running regular scans with reputable security software and staying cautious about free downloads from unverified websites can go a long way toward keeping your system free of adware.
Analysis Report
General information
| Family Name: | Adware.Go.Agent.B |
|---|---|
| Packers: | UPX x64 |
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
7facb5878484d8d9973a7fba2da84de7
SHA1:
00af6a3dcdb5804d330a0f93c53095337474c58e
SHA256:
9DE09B8EA028719E54148AC6979AE32F083A7AD40137CE8E9C529B6B1A5910AF
File Size:
1.42 MB, 1419840 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 relocations information
- File doesn't have resources
- File doesn't have security information
- File has been packed
- File is 64-bit executable
- File is console application (IMAGE_SUBSYSTEM_WINDOWS_CUI)
- File is either console or GUI application
Show 3 more
- File is Native application (NOT .NET application)
- IMAGE_FILE_DLL is not set inside PE header (Executable)
- IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)
File Traits
- golang
- No Version Info
- packed
- x64
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: | 545 |
|---|---|
| Potentially Malicious Blocks: | 1 |
| Whitelisted Blocks: | 544 |
| Unknown Blocks: | 0 |
Visual Map
? - Unknown Block
x - Potentially Malicious Block
Similar Families
Similar Families
This section lists other families that share similarities with this family, based on EnigmaSoft’s analysis. Many malware families are created from the same malware toolkits and use the same packing and encryption techniques but uniquely extend functionality. Similar families may also share source code, attributes, icons, subcomponents, compromised and/or invalid digital signatures, and network characteristics. Researchers leverage these similarities to rapidly and effectively triage file samples and extend malware detection rules.- Bulz.LG
- Bulz.PB
- Go.Agent.B
Files Modified
Files Modified
This section lists files that were created, modified, moved and/or deleted by samples in this family. File system activity can provide valuable insight into how malware functions on the operating system.| File | Attributes |
|---|---|
| \device\namedpipe\wkssvc | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\temp\overdrive.exe | Generic Read,Write Data,Write Attributes,Write extended,Append data |
Registry Modifications
Registry Modifications
This section lists registry keys and values that were created, modified and/or deleted by samples in this family. Windows Registry activity can provide valuable insight into malware functionality. Additionally, malware often creates registry values to allow itself to automatically start and indefinitely persist after an initial infection has compromised the system.| Key::Value | Data | API Name |
|---|---|---|
| HKLM\software\microsoft\windows\currentversion\run::overdrive | C:\Users\Kcinreij\AppData\Local\Temp\overdrive.exe | RegNtPreCreateKey |
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 |
|---|---|
| Syscall Use |
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| Network Winsock2 |
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| Network Winsock |
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| User Data Access |
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