Backdoor.Ursu.O
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: | 22,709 |
| Threat Level: | 60 % (Medium) |
| Infected Computers: | 181 |
| First Seen: | February 28, 2022 |
| Last Seen: | June 14, 2026 |
| OS(es) Affected: | Windows |
Table of Contents
Analysis Report
General information
| Family Name: | Backdoor.Ursu.O |
|---|---|
| Signature status: | Hash Mismatch |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
d8affc8e6034d82b4137f7775ae10839
SHA1:
1cfaad75b796f1331937eb61f9ace7957b37b18b
SHA256:
272D12A55A64C48020DB8AD3ACF01D1791DFEC8B85CABA7DDD89EBE3FF13C75F
File Size:
1.58 MB, 1575304 bytes
|
|
MD5:
bbafc634c81ec06a2bbae7c4fb90f4a7
SHA1:
d202c413893db0fc491935dac7cb9726e0e5981a
SHA256:
AC0560950FE76493D0F197C33AE8CF9F7BB201BEB0AF0D970B328A0C00C5E87D
File Size:
2.28 MB, 2282040 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- File has TLS 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 | Roblox Corporation |
| File Description | Roblox |
| File Version |
|
| Legal Copyright | Copyright © 2020 Roblox Corporation. All rights reserved. |
| Original Filename | Roblox.exe |
| Product Name | Roblox Bootstrapper |
| Product Version |
|
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 |
|---|---|---|
| Roblox Corporation | DigiCert EV Code Signing CA (SHA2) | Hash Mismatch |
| Roblox Corporation | Symantec Class 3 Extended Validation Code Signing CA - G2 | Hash Mismatch |
File Traits
- 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: | 5,423 |
|---|---|
| Potentially Malicious Blocks: | 483 |
| Whitelisted Blocks: | 4,476 |
| Unknown Blocks: | 464 |
Visual Map
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Data truncated
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block
? - 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.- Ursu.O
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\crashpad_5288_dqfkwbzsawkovgxo | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| \device\namedpipe\crashpad_5288_dqfkwbzsawkovgxo | Generic Read,Write Data,Write Attributes,Write extended,Append data,LEFT 524288 |
| c:\users\user\appdata\local\temp\crashpad_roblox\metadata | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\temp\crashpad_roblox\settings.dat | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\temp\rbx-3732767a.log | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\rbx-837fcf8d.log | Generic Write,Read Attributes |
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 Wininet |
|
| Network Winhttp |
|
| Encryption Used |
|
| Process Manipulation Evasion |
|
| Process Shell Execute |
|
| Network Winsock |
|
| Network Info Queried |
|
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\user\downloads\d202c413893db0fc491935dac7cb9726e0e5981a_0002282040 c:\users\user\downloads\d202c413893db0fc491935dac7cb9726e0e5981a_0002282040 --crashpad --no-rate-limit --database=C:\Users\Eysnvkvu\AppData\Local\Temp\crashpad_roblox --metrics-dir=C:\Users\Eysnvkvu\AppData\Local\Temp\crashpad_roblox --url=https://upload.crashes.rbxinfra.com/post --annotation=UploadAttachmentKiloByteLimit=100 --annotation=UploadPercentage=0 --annotation=format=minidump --annotation=token=a2440b0bfdada85f34d79b43839f2b49ea6bba474bd7d126e844bc119271a1c3 --initial-client-data=0x4f4,0x4f8,0x4fc,0x4d0,0x504,0x74882c,0x74883c,0x74884c
|
