Trojan:Win32/Colisi.F
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: | 90 % (High) |
| Infected Computers: | 75 |
| First Seen: | August 24, 2015 |
| Last Seen: | October 24, 2025 |
| OS(es) Affected: | Windows |
PC security researchers have received reports of Trojan:Win32/Colisi.F infections. According to these reports, their security software will detect Trojan:Win32/Colisi.F repeatedly, often flagging certain files associated with Google Chrome. In many cases, Trojan:Win32/Colisi.F detections may indicate a faulty Google Chrome installation. Although the Trojan:Win32/Colisi.F description indicates that Trojan:Win32/Colisi.F is a Trojan, this infection is better classified as a PUP (Potentially Unwanted Program). To prevent issues related to Trojan:Win32/Colisi.F, PC security researchers recommend that computer users only download software directly from reputable sources, and always avoid agreeing to the installation of any added components that may not be directly related to the installed software. If your security software is reporting the presence of Trojan:Win32/Colisi.F repeatedly, malware analysts recommend taking steps to ensure that you have installed Google Chrome properly and that all certificates are legitimate.
Table of Contents
Dealing with Trojan:Win32/Colisi.F and Similar Threats
The best way to prevent attacks involving Trojan:Win32/Colisi.F and similar threats is to take preventive measures to ensure that your computer is protected. The following are some steps that you can take to prevent Trojan:Win32/Colisi.F and similar infections:
- Malware analysts recommend that computer users use reliable security software to protect their computer. Examples of important security software that computer users should have installed on their machines include anti-virus programs, anti-malware programs capable of detecting low-level threats, anti-spam filters and a reliable firewall.
- All software, but especially security software, should be updated regularly. To prevent security breaches you should always install security updates and patches.
- Malware analysts recommend learning how to spot known tactics. Computer users should avoid opening emails from unknown sources, and avoid threatening embedded links and attachments especially. Computer users should also avoid interacting with pop-up windows containing suspicious content or connecting to websites that may be regarded as unsafe. Some examples of websites considered unsafe include pornographic websites, peer-to-peer file sharing websites and Web pages containing pirated content.
If Trojan:Win32/Colisi.F is on your computer, you should take steps to remove these types of infections. To deal with these types of infections, malware analysts recommend running a full scan of your computer. Noticing any of the following symptoms, you should take additional steps to remove possible Trojan:Win32/Colisi.F infections, even if your security software fails to detect a problem on your computer:
- A common symptom of these types of infections may include a multitude of unwanted content on the affected computer's Web browser. Examples of unwanted content associated with these types of issues include pop-up windows, redirects to unwanted content, and changes made to the affected Web browser's settings that display unwanted Web pages during startup or when opening a new window or tab.
- Problems like Trojan:Win32/Colisi.F may be linked to performance issues on affected computers. Some examples of performance issues that may be related to Trojan:Win32/Colisi.F include slow performance, crashing or freezing on affected computers, failure to load Web pages and applications that fail to load.
- Many components like Trojan:Win32/Colisi.F may interact poorly with software on affected computers. The presence of numerous error messages and notifications on a computer may indicate the presence of Trojan:Win32/Colisi.F and similar unwanted components.
To remove a Trojan:Win32/Colisi.F infection, malware analysts recommend the use of a reliable security application that is fully up-to-date. Any Trojan:Win32/Colisi.F detections are not caused by a false positive or by the presence of suspicious software. For example, some Trojan:Win32/Colisi.F problems have been related to video game emulators and other possibly suspicious applications that have been associated with certain shady online sources.
Analysis Report
General information
| Family Name: | Trojan.Symmi.E |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
4ba7b218da448145f64d4edd10534576
SHA1:
fa8421cb0352317e88a1dfcd46d0a77881d4703e
SHA256:
28479709F17114FF7B2999241CA07CC281C33F298EE0421161846A36BE32F072
File Size:
6.77 MB, 6769664 bytes
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Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have resources
- File doesn't have security information
- File has exports table
- File is 32-bit executable
- File is either console or GUI application
- File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
- File is Native application (NOT .NET application)
- 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 Traits
- dll
- HighEntropy
- 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: | 379 |
|---|---|
| Potentially Malicious Blocks: | 15 |
| Whitelisted Blocks: | 364 |
| Unknown Blocks: | 0 |
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 |
|---|---|
| Syscall Use |
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| Process Shell Execute |
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| Anti Debug |
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Shell Command Execution
Shell Command Execution
This section lists Windows shell commands that are run by the samples in this family. Windows Shell commands are often leveraged by malware for nefarious purposes and can be used to elevate security privileges, download and launch other malware, exploit vulnerabilities, collect and exfiltrate data, and hide malicious activity.
C:\WINDOWS\SysWOW64\rundll32.exe C:\WINDOWS\system32\rundll32.exe c:\users\user\downloads\fa8421cb0352317e88a1dfcd46d0a77881d4703e_0006769664.,LiQMAxHB
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