Downloader.Castov.B
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: | 6,482 |
| Threat Level: | 70 % (High) |
| Infected Computers: | 20,047 |
| First Seen: | August 13, 2013 |
| Last Seen: | December 5, 2025 |
| OS(es) Affected: | Windows |
Downloader.Castov.B is a Trojan that drops other malware infections onto the affected computer system. Once run, Downloader.Castov.B creates the malevolent files and registry entries so that it can launch automatically whenever the computer user starts Windows. In order to obtain the compromised PC's IP address, Downloader.Castov.B connects to the specific remote location. Downloader.Castov.B may then aim at accessing the Tor anonymity network using one of the particular web addresses. Downloader.Castov.B may then drop additional files onto the targeted computer.
Table of Contents
File System Details
Downloader.Castov.B may create the following file(s):
| # | File Name |
Detections
Detections: The number of confirmed and suspected cases of a particular threat detected on
infected computers as reported by SpyHunter.
|
|---|---|---|
| 1. | %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\alg.exe | |
| 2. | %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\svchost.exe | |
| 3. | %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\ssleay32.dll | |
| 4. | %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\spoolsv.exe | |
| 5. | %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\libeay32.dll | |
| 6. | %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\mdm.exe | |
| 7. | %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\config.ini |
Registry Details
Downloader.Castov.B may create the following registry entry or registry entries:
Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\mdm.exe\""
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"mdm" = "\"%UserProfile%\Application
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"svchost" = "\"%UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\svchost.exe\""
URLs
Downloader.Castov.B may call the following URLs:
| ipaddress.com |
Analysis Report
General information
| Family Name: | Trojan.Ulise.SA |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
d820ae8abc62ef0455db8814aee65feb
SHA1:
595650bfd6a82c25ecebe549dcbce1a172a42af9
SHA256:
021ABBBA6AB6152D9BE4423ACABC5BBA3644419EDD35DADC47C75CAB0C1263BA
File Size:
3.88 MB, 3879936 bytes
|
|
MD5:
13caa191f17dd1b52be1a56a7a4f103a
SHA1:
928fe301b26c65b90b0078923d407c8e5e995268
SHA256:
E9341EB78799E00CD4621C5C0B061CFABA9016A51AA68CEC643BDAF67855AEB6
File Size:
7.09 MB, 7089664 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- File doesn't have relocations information
- File doesn't have security information
- 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
Show More
- 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 |
|---|---|
| Assembly Version | 3.0.2.0 |
| Company Name |
|
| File Description |
|
| File Version |
|
| Internal Name |
|
| Legal Copyright |
|
| Original Filename |
|
| Product Name |
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| Product Version |
|
File Traits
- 2+ executable sections
- Enigma
- HighEntropy
- ntdll
- WriteProcessMemory
- 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: | 6,632 |
|---|---|
| Potentially Malicious Blocks: | 12 |
| Whitelisted Blocks: | 6,270 |
| Unknown Blocks: | 350 |
Visual Map
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0
0
0
0
0
0
0
0
0
0
0
0
1
0
2
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
...
Data truncated
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block
? - Unknown Block
x - Potentially Malicious Block
