Backdoor.Zegost.BA
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.
| Threat Level: | 60 % (Medium) |
| Infected Computers: | 12 |
| First Seen: | September 16, 2018 |
| Last Seen: | May 14, 2021 |
| OS(es) Affected: | Windows |
Table of Contents
Analysis Report
General information
| Family Name: | Backdoor.Zegost.BA |
|---|---|
| Packers: | UPX |
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
1953c97029337ec04a8d4b69911d843f
SHA1:
0d2e61439f901e60851d7f4c17dae9b8439f0e66
SHA256:
CD8C11EC94B74FD3357E4B9ED00DFB2C1D94D9B1BBA9F6FC4D6C415AA8437B96
File Size:
46.59 KB, 46592 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 relocations information
- File doesn't have security information
- File has been packed
- 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)
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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 |
|---|---|
| Company Name | Microsoft Corporation |
| File Description | .NET Runtime Optimization Service |
| File Version | 3.0.50727.3053 |
| Internal Name | mscorsvw |
| Legal Copyright | Microsoft Corporation. All rights reserved. |
| Original Filename | mscorsvw.exe |
| Private Build | 20150830.01 |
| Product Name | Microsoft .NET Framework |
| Product Version | 3.0.50727.3053 |
File Traits
- packed
- 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: | 16 |
|---|---|
| Potentially Malicious Blocks: | 8 |
| Whitelisted Blocks: | 3 |
| Unknown Blocks: | 5 |
Visual Map
x
?
?
x
x
x
x
?
x
?
0
?
x
x
0
0
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.- Zegost.B
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:\windows\microsoft.net\framework\v3.5\mscorsvw.exe | Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 262144 |
| c:\windows\microsoft.net\framework\v3.5\mscorsvw.exe | Generic Write,Read Attributes |
| c:\windows\syswow64\10479781.bak | Synchronize,Write Data |
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::disableantispyware | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect | RegNtPreCreateKey | |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | ፮征≋ǝ | RegNtPreCreateKey |
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| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 썟徑≋ǝ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 㛝忆≋ǝ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 顆忧≋ǝ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | Ṧ怯≋ǝ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | ܺ恹≋ǝ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 跭惀≋ǝ | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecisakmppolicy{5caea1ff-4947-42b4-8372-7cc94cf7cf72}::classname | ipsecISAKMPPolicy | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecisakmppolicy{5caea1ff-4947-42b4-8372-7cc94cf7cf72}::name | ipsecISAKMPPolicy{5caea1ff-4947-42b4-8372-7cc94cf7cf72} | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::classname | ipsecFilter | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::name | ipsecFilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d} | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::ipsecname | Filter1 | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::ipsecid | {1f01df2a-e3a6-40a4-b818-619ae6efe74d} | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::ipsecdatatype | Ā | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::ipsecdata | ₵胜⻈ᇑ麨ꀀ贤ℰ | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::whenchanged | 橮 | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::classname | ipsecFilter | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::name | ipsecFilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d} | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::ipsecname | Filter1 | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::ipsecid | {1f01df2a-e3a6-40a4-b818-619ae6efe74d} | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::ipsecdatatype | Ā | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::ipsecdata | ₵胜⻈ᇑ麨ꀀ贤ℰF 唪ϔ䧌ꊾ뇲ﾪ䎈 | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::whenchanged | 橮 | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::classname | ipsecFilter | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::name | ipsecFilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d} | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::ipsecname | Filter1 | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::ipsecid | {1f01df2a-e3a6-40a4-b818-619ae6efe74d} | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::ipsecdatatype | Ā | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::ipsecdata | ₵胜⻈ᇑ麨ꀀ贤ℰ 唪ϔ䧌ꊾ뇲ﾪ䎈 䂫敜䄲瞝䩟ꮱ ƽ | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows\ipsec\policy\local\ipsecfilter{1f01df2a-e3a6-40a4-b818-619ae6efe74d}::whenchanged | 橮 | RegNtPreCreateKey |
| HKLM\software\policies\microsoft\windows defender::disableantispyware | RegNtPreCreateKey | |
| HKLM\system\controlset001\control\session manager::pendingfilerenameoperations | *1\??\C:\Windows\SystemTemp\MicrosoftEdgeUpdate.exe.old5af52 *1\??\C:\Windows\SystemTemp\CopilotUpdate.exe.old5af62 *1\??\C:\P | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 | �� * � /�� Y� d� kP~ � � �ރ �p ��^ �o � ee� Vs} 3 kP~ 3 ��1 �� 7 � �� ﺃ d B F e H e�� (P ��1 n �� f e�� i | 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 |
|---|---|
| Anti Debug |
|
| User Data Access |
|
| Process Manipulation Evasion |
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| Process Shell Execute |
|
| Syscall Use |
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| Network Winsock2 |
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| Service Control |
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| Encryption Used |
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| Process Terminate |
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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.
open netsh.exe advfirewall firewall add rule name="Microsoft.Net" dir=out program="C:\Windows\Microsoft.NET\Framework\v3.5\mscorsvw.exe" action=allow
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open netsh.exe advfirewall firewall add rule name="Microsoft.Net" dir=in program="C:\Windows\Microsoft.NET\Framework\v3.5\mscorsvw.exe" action=allow
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open netsh.exe ipsec static add policy name=Block
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open netsh.exe ipsec static add filterlist name=Filter1
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open netsh.exe ipsec static add filter filterlist=Filter1 srcaddr=any dstaddr=Me dstport=135 protocol=TCP
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open netsh.exe ipsec static add filter filterlist=Filter1 srcaddr=any dstaddr=Me dstport=139 protocol=TCP
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open netsh.exe ipsec static add filter filterlist=Filter1 srcaddr=any dstaddr=Me dstport=445 protocol=TCP
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open netsh.exe ipsec static add filteraction name=FilteraAtion1 action=block
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open netsh.exe ipsec static add rule name=Rule1 policy=Block filterlist=Filter1 filteraction=FilteraAtion1
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open netsh.exe ipsec static set policy name=Block assign=y
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