Trojan.Kryptik.UBR
Trojan.Kryptik.UBR is a detection name used by security software to identify a trojan horse threat that has been packed or obfuscated in a way that makes it difficult for antivirus engines to analyze right away. The "Kryptik" label generally refers to a family of trojans that rely on code obfuscation or encryption to hide their true purpose from security tools, rather than describing one single piece of malware with a fixed function. Because specific technical details about this particular detection are not fully documented, this article describes the typical behavior associated with threats in this category so you can understand the general risks and how to respond.
Table of Contents
What This Threat Does
Like most trojans, Trojan.Kryptik.UBR is designed to disguise itself as a legitimate or harmless file while secretly carrying out malicious actions in the background. Trojans in this family commonly act as a delivery mechanism for other malicious components, meaning the initial detection may only be the tip of the iceberg. Typical actions associated with Kryptik-family trojans include downloading and installing additional malware, modifying system settings, attempting to disable or interfere with security software, and collecting information from the infected device. Some variants may also try to establish a connection to a remote server controlled by attackers, allowing further instructions or payloads to be delivered to the compromised machine.
How It Usually Gets Onto Computers
Trojans of this type typically spread through deceptive methods rather than by exploiting a single specific vulnerability. Common infection paths include malicious email attachments disguised as invoices, receipts, or documents; bundled downloads from unofficial or pirated software sources; fake software updates or cracked program installers; and malicious links shared through phishing messages or compromised websites. Because the malware is obfuscated, it can slip past less thorough scans or appear as an unfamiliar, hard-to-identify file until a security tool flags it based on behavior or heuristic analysis.
Risks for the User
An active trojan infection can expose users to a range of risks. These commonly include theft of personal or financial information, unauthorized access to the system by remote attackers, degraded system performance due to background malicious processes, and the installation of additional threats such as ransomware, spyware, or adware. In some cases, infected systems may be added to a larger network of compromised machines used for further criminal activity. The exact impact depends on the specific payload the trojan delivers, which can vary between infections even when they share the same detection name.
Signs of Infection
Because trojans are built to operate quietly, visible symptoms are not always obvious. However, users may notice warning signs such as unexpected slowdowns, unfamiliar processes running in the task manager, changes to browser or system settings that were not made intentionally, unusual network activity, or security software repeatedly flagging the same file or location. Frequent crashes or unexpected pop-ups can also indicate a deeper compromise.
How to Stay Protected
To reduce the risk of infections like Trojan.Kryptik.UBR, avoid downloading software from unofficial sources, be cautious with email attachments and links from unknown senders, and keep your operating system and applications updated. Running regular full-system scans with reputable security software, enabling automatic threat detection, and maintaining backups of important files can also help minimize damage if an infection does occur. If a detection appears, it is best to let your security software quarantine or remove the file and to review your system for any additional suspicious activity afterward.
Analysis Report
General information
| Family Name: | Trojan.Kryptik.UBR |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
ef82adf68e32f7e2539ad81d026ea5a5
SHA1:
abadaef511ee7ab3329685ba15d267914083f73a
SHA256:
D39D472AB15F807A71AC1B86D09031D8B1508B64C5D9D31DBEF71A618F37C32A
File Size:
535.04 KB, 535040 bytes
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Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- File doesn't have security information
- 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)
- 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 |
|---|---|
| Company Name |
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| File Description |
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| File Version |
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| Internal Name |
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| Legal Copyright |
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| Original Filename |
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| Product Name |
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| Product Version |
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File Traits
- 2+ executable sections
- HighEntropy
- No Version Info
- x86
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\gmdasllogger | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\ixp000.tmp\dnx74.exe | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\ixp000.tmp\dnx74.exe | Synchronize,Write Attributes |
| c:\users\user\appdata\local\temp\ixp000.tmp\lrh86.exe | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\ixp000.tmp\lrh86.exe | Synchronize,Write Attributes |
| c:\users\user\appdata\local\temp\ixp000.tmp\tmp4351$.tmp | Generic Write,Read Attributes,Delete |
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\wow6432node\microsoft\windows\currentversion\runonce::wextract_cleanup0 | rundll32.exe C:\WINDOWS\system32\advpack.dll,DelNodeRunDLL32 "C:\Users\Ogzblasn\AppData\Local\Temp\IXP000.TMP\" | 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 |
|---|---|
| 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\Ogzblasn\AppData\Local\Temp\IXP000.TMP\dnX74.exe
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