Trojan.Ursu.B
Table of Contents
Analysis Report
General information
| Family Name: | Trojan.Ursu.B |
|---|---|
| Signature status: | Hash Mismatch |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
807d442e33cd5ec3e504c33c9652fe95
SHA1:
a7306e88d7b5da1385a455edec4eef1f4869e34d
SHA256:
87FFA9F8593F8BCA690AA33C3AE9382E23940B1B35B8483D2EA8333DDF2034BE
File Size:
827.10 KB, 827096 bytes
|
|
MD5:
55bb029fb7339540a0f58d1c8d8a42a5
SHA1:
009054214f8d7e81f584d0eb634e61cbdae536bf
SHA256:
ADA60B4B171ED5DE5B8C75B2FB2D29E72EB9C037ECE7CF45AA2A8DD8F429B0A1
File Size:
823.30 KB, 823296 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 | (C) 2012 Roblox Corporation. All rights reserved. |
| Original Filename | Roblox.exe |
| Product Name | Roblox Bootstrapper |
| Product Version | 1, 6, 3, 0 |
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 | Symantec Class 3 Extended Validation Code Signing CA - G2 | Hash Mismatch |
| Roblox Corporation | thawte SHA256 Code Signing CA | Hash Mismatch |
File Traits
- 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: | 2,859 |
|---|---|
| Potentially Malicious Blocks: | 475 |
| Whitelisted Blocks: | 2,383 |
| Unknown Blocks: | 1 |
Visual Map
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
x
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
x
x
x
x
x
x
x
x
0
0
0
x
0
x
0
0
0
0
0
0
0
x
x
0
x
x
0
0
x
0
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
x
0
0
0
x
0
x
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
x
x
0
0
0
0
x
0
0
x
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
x
x
0
x
x
0
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
x
0
0
0
0
0
0
x
x
0
0
x
x
0
0
0
0
0
0
0
x
x
x
x
0
0
0
0
0
x
0
x
0
0
0
0
0
x
x
x
x
x
0
0
0
0
0
0
x
0
0
0
0
0
x
0
0
x
0
0
x
x
0
x
x
0
1
x
x
x
x
1
x
0
0
0
0
0
0
0
0
0
0
0
0
x
0
x
x
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
x
0
x
x
0
0
x
0
x
x
0
x
x
x
0
x
x
x
0
0
x
0
x
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
x
x
x
0
0
0
0
0
x
x
0
0
0
0
0
0
x
x
x
0
x
x
x
x
x
x
x
x
0
0
x
x
0
x
x
0
0
x
0
0
0
x
x
0
0
0
0
0
0
x
0
0
0
0
x
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
x
x
0
0
0
0
0
x
0
0
0
x
x
0
x
0
1
1
0
0
0
0
x
0
0
x
0
0
0
0
0
0
0
0
0
0
x
x
x
x
x
x
x
x
0
x
0
x
x
x
0
0
x
x
x
x
0
x
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
x
0
0
0
x
x
0
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
x
0
0
x
x
0
0
0
0
x
0
0
0
0
0
0
0
0
x
0
x
x
x
x
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
x
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
x
0
0
x
0
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
x
0
0
0
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
x
0
x
0
0
x
x
x
x
x
x
0
0
x
0
0
0
0
x
0
0
x
0
x
x
x
x
x
0
x
0
0
0
0
x
0
x
x
x
x
x
0
0
0
x
x
x
x
x
x
x
0
x
0
x
x
0
x
x
x
x
0
0
x
x
x
x
0
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
x
x
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
x
x
0
0
x
0
0
0
0
0
0
0
0
0
0
0
x
x
x
0
0
0
0
0
0
0
x
0
x
0
0
0
x
x
x
x
0
0
0
0
1
0
0
x
x
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
x
0
0
x
0
0
0
0
0
?
0
0
x
x
x
x
0
x
0
x
0
0
0
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
x
0
0
0
x
x
x
0
x
0
0
0
0
x
x
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
x
x
x
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
x
x
x
x
0
0
x
0
0
0
0
0
0
0
0
x
x
x
0
x
0
0
0
0
0
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
x
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
x
x
0
0
0
0
x
x
x
x
0
x
x
0
0
0
x
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
x
0
0
0
x
0
0
0
x
0
x
x
x
0
x
0
0
0
0
0
x
x
x
x
x
x
x
x
0
0
x
x
x
x
x
0
0
0
0
x
x
x
0
x
0
0
0
x
x
0
0
0
0
x
0
0
0
0
0
x
x
0
0
0
0
x
x
0
x
0
0
0
x
0
x
0
x
0
x
0
x
x
x
0
0
x
0
x
0
0
0
0
0
0
x
x
x
x
x
x
x
x
0
0
x
x
x
x
x
x
x
x
x
0
0
0
0
0
x
x
0
x
0
x
0
x
0
x
0
x
x
x
x
0
x
x
x
x
x
0
0
0
x
x
0
x
0
0
0
x
x
x
x
x
0
x
x
x
0
0
0
x
x
0
0
x
x
x
x
0
x
0
0
0
x
x
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
x
0
0
x
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
x
x
x
x
x
0
0
0
0
0
0
x
0
x
0
0
0
0
0
x
x
x
x
x
x
x
x
x
x
x
x
0
x
0
0
0
0
x
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
x
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
x
x
0
x
x
0
x
0
x
x
0
0
0
x
0
0
0
x
0
x
x
x
x
x
x
x
x
x
x
0
x
x
0
0
x
0
x
x
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
x
x
0
0
0
0
0
x
0
0
0
x
0
0
0
0
x
x
0
0
0
0
0
0
0
0
x
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
0
0
1
1
1
1
0
2
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
0
0
1
1
0
...
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.B
- Ursu.BF
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\temp\rbx-014de9cc.log | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\rbx-71a2f043.log | Generic Write,Read Attributes |
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 |
|---|---|---|
| HKCU\software\roblox corporation\roblox::cpath | C:\Users\user\AppData\LocalLow\rbxcsettings.rbx | 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 |
|---|---|
| Network Winsock2 |
|
| Network Info Queried |
|
| Network Wininet |
|
| Network Winhttp |
|
