Foidan
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.
| Popularity Rank: | 3,484 |
| Threat Level: | 80 % (High) |
| Infected Computers: | 197 |
| First Seen: | October 9, 2013 |
| Last Seen: | October 14, 2025 |
| OS(es) Affected: | Windows |
The Foidan family of Trojans is a group of threats that are designed to alter how the victim's Web browser behaves. Criminals may use Foidan to cause browser redirects, spy on the victim's online activities and take over the victim's Web browser in a variety of ways. Foidan attacks seldom occur on their own and Foidan Trojans may be coupled with other types of threats. If your computer is infected with a variety of Foidan, it is important to use a strong, reliable anti-malware application to protect your computer.
Table of Contents
Attack Tactics of Foidan and Similar Trojans
The origin of the Trojan name is the Trojan Horse from the Iliad. Like the legendary Trojan Horse, Trojans carry out a similar tactic to infiltrate a computer. A Trojan is usually disguised as a legitimate file or beneficial program which, once opened, delivers an unsafe payload in the form of harmful code that may cause a variety of problems on the victim's computer. Foidan Trojans are no exception. Trojans in the Foidan family of threats may be disguised as video codecs or as PDF file attachments. Once opened, they install threatening components on the victim's computer which are programed to seize the victim's PC and monitor its online activities. Trojans in the Foidan family may also cause other problems on the victim's computer, affecting the infected computer's performance and Internet connectivity. Other characteristics of some Foidan variants include the ability to block legitimate security software and make PC security researchers' work more difficult by preventing the study of these suspicious files on virtual machines or using tools commonly used to study threats in a control environment.
The Purpose of Trojans in the Foidan Family of Malware
In the end, the main purpose of threats in the Foidan family is to generate revenue at the expense of the computer user. Trojans that take over the victim's Web browser allow criminals to generate profits in a variety of ways. For example, criminals may use Foidan Trojans to spy on the victim's online activities. Data gathered in this way may be used to deliver targeted advertisements to the victim's Web browser. Foidan Trojans may also be used to force computer users to visit certain websites in order to boost these pages' page ranking and generate significant profits from advertising and marketing.
File System Details
| # | File Name |
Detections
Detections: The number of confirmed and suspected cases of a particular threat detected on
infected computers as reported by SpyHunter.
|
|---|---|---|
| 1. | %APPDATA% \ie_util.exe | |
| 2. | %APPDATA% \fnmod_32.exe |
Registry Details
Analysis Report
General information
| Family Name: | Trojan.Snojan.A |
|---|---|
| Signature status: | Root Not Trusted |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
5a06d1f46a3568555ea80d3b02ab0443
SHA1:
0d35a4b2732d6d8013289747a9e41343e37d4240
SHA256:
C7F8D6F9B3A499CCFEC213E0F9E9DB6CB9A3C03B09828728A511B44476F66F6C
File Size:
293.90 KB, 293896 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 is 32-bit executable
- File is console application (IMAGE_SUBSYSTEM_WINDOWS_CUI)
- File is either console or GUI application
- File is Native application (NOT .NET application)
- File is not packed
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- IMAGE_FILE_DLL is not set inside PE header (Executable)
- IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)
Digital Signatures
Digital Signatures
This section lists digital signatures that are attached to samples within this family. When analyzing and verifying digital signatures, it is important to confirm that the signature’s root authority is a well-known and trustworthy entity and that the status of the signature is good. Malware is often signed with non-trustworthy “Self Signed” digital signatures (which can be easily created by a malware author with no verification). Malware may also be signed by legitimate signatures that have an invalid status, and by signatures from questionable root authorities with fake or misleading “Signer” names.| Signer | Root | Status |
|---|---|---|
| MicroWorld Technologies Inc. | Class 3 Public Primary Certification Authority | Root Not Trusted |
File Traits
- HighEntropy
- No Version Info
- 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: | 566 |
|---|---|
| Potentially Malicious Blocks: | 144 |
| Whitelisted Blocks: | 341 |
| Unknown Blocks: | 81 |
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 |
|---|---|
| Network Winsock2 |
|
