Trojan.Kryptik.Gen.JYK
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: | 26,804 |
| Threat Level: | 80 % (High) |
| Infected Computers: | 2 |
| First Seen: | September 20, 2026 |
| Last Seen: | October 16, 2026 |
| OS(es) Affected: | Windows |
Trojan.Kryptik.Gen.JYK is a Windows-based Trojan detection that covers a family of malicious executables designed to quietly infiltrate a computer, disguise themselves as legitimate software, and carry out harmful actions in the background without the user's knowledge. Classified as a high-risk threat, it is capable of giving attackers significant control over an infected machine, making prompt detection and removal important.
Table of Contents
What Trojan.Kryptik.Gen.JYK Does
Once active on a system, Trojan.Kryptik.Gen.JYK runs silently in the background, often masquerading as a harmless or even helpful application component, such as a support or update helper process. The sample associated with this detection is an unsigned, 64-bit Windows executable that does not use common packing techniques but displays high entropy, a trait often associated with obfuscated or encrypted malicious code designed to evade detection.
Behind this disguise, the Trojan performs several concerning actions. It creates and modifies files in hidden folders within the user's local application data directory, drops additional executable files, and can launch new processes, including copies of itself, to maintain its presence. It has also been observed using low-level system techniques, such as unmapping sections of process memory, which is a method sometimes used to hide malicious code inside legitimate processes or to replace parts of a running program with harmful content. These capabilities suggest the Trojan is built to operate stealthily and resist simple shutdown attempts.
Ultimately, a Trojan of this type may allow remote attackers to gain extensive control over the infected system, potentially enabling further malware downloads, data theft, system monitoring, or other damaging activity.
How It Usually Gets Onto Computers
Trojan.Kryptik.Gen.JYK typically spreads through deceptive or opportunistic means rather than through legitimate software channels. Common infection paths for this type of threat include software downloaded from untrustworthy or compromised websites, bundled installers, cracked or pirated applications, and email attachments from unknown or untrusted senders. Such attachments may be disguised using familiar file extensions, including executable files or even files made to appear as images or videos, tricking users into opening them. Exploiting outdated software or unpatched security vulnerabilities is also a typical method used by this category of malware to install itself without any direct action from the user.
Risks for the User
Because Trojans in this family can operate with elevated privileges and hide their activity, infected users face several risks, including unauthorized remote access to their system, theft of sensitive information, installation of additional malware, degraded system performance, and potential use of the computer as part of a larger malicious operation. The lack of a digital signature and the use of evasive techniques make this threat particularly difficult for an average user to detect manually.
Signs of Infection
Since this Trojan is designed to run quietly, obvious warning signs may be limited. Users should watch for unfamiliar processes or executable files appearing in local application data folders, unexpected new programs launching on their own, unusual network activity, sluggish system performance, or security tools reporting suspicious files that cannot be easily explained.
How to Stay Protected
To reduce the risk of infection, users should avoid downloading software from unofficial or unverified websites, refrain from opening email attachments from unknown senders, and keep their operating system and applications fully updated with the latest security patches. Running reputable, up-to-date security software and performing regular system scans can help detect and remove threats like Trojan.Kryptik.Gen.JYK before they cause serious harm.
Analysis Report
General information
| Family Name: | Trojan.Kryptik.Gen.JYK |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
4de505ee3c2c1891c1073fa8ad741855
SHA1:
c187074bcb3f6ae373008376e424f8456b29def6
SHA256:
7D21A30C4737407731067854EF938B117717BCFFEF328769D02C7B1FF55CB6D7
File Size:
853.50 KB, 853504 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 has TLS information
- File is 64-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
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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)
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 |
|---|---|
| Comments | Application support process helper. |
| Company Name | Riverbend Softworks |
| File Description | Application support host |
| File Version | 1.4.55.1208 |
| Internal Name | App Support |
| Legal Copyright | Copyright (C) 2021-2024 Riverbend Softworks |
| Legal Trademarks | Licensed component. |
| Original Filename | App Support.exe |
| Private Build | 1.4.55 build 1208 |
| Product Name | App Support |
| Product Version | 1.4.55.1208 |
| Special Build | Release |
File Traits
- GetConsoleWindow
- HighEntropy
- 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: | 3,701 |
|---|---|
| Potentially Malicious Blocks: | 32 |
| Whitelisted Blocks: | 3,498 |
| Unknown Blocks: | 171 |
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.- Badjoke.FDA
- Bitcoinminer.CEC
- Trojan.Agent.Gen.FRP
- Trojan.Kryptik.Gen.JQT
- Trojan.Kryptik.Gen.JYK
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 |
|---|---|
| c:\users\user\appdata\local\cversions_tum4 | Synchronize,Write Attributes |
| c:\users\user\appdata\local\cversions_tum4\imgcacheeo1.exe | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\cversions_tum4\imgcacheeo1.exe | Synchronize,Write Attributes |
| c:\users\user\appdata\local\cversions_tum4\imgcacheeo1.exe | Synchronize,Write Data |
| c:\users\user\appdata\local\cversions_tum4\imgcacheeo1.exe.tmp | Generic Write |
| c:\users\user\appdata\local\cversions_tum4\imgcacheeo1.exe.tmp | Synchronize,Write Attributes |
| c:\users\user\appdata\local\uvw1go.exe | Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 262144 |
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\policies\microsoft\windows defender\exclusions\paths::c:\users\urpplsle\appdata\local\cversions_tum4\ | RegNtPreCreateKey | |
| HKLM\software\policies\microsoft\windows defender\exclusions\paths::c:\users\urpplsle\appdata\local\cversions_tum4\ | RegNtPreCreateKey | |
| HKLM\software\policies\microsoft\windows defender\exclusions\paths::c:\users\urpplsle\appdata\local\cversions_tum4\imgcacheeo1.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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| Process Manipulation Evasion |
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| Process Shell Execute |
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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:\Users\Urpplsle\AppData\Local\uvw1go.exe "C:\Users\Urpplsle\AppData\Local\uvw1go.exe"
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C:\Users\Urpplsle\AppData\Local\cversions_Tum4\imgcacheeo1.exe "C:\Users\Urpplsle\AppData\Local\cversions_Tum4\imgcacheeo1.exe"
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