Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'NSecAgent' = '"%CommonProgramFiles(x86)%\NSecsoft\NSec\NSecAgent.exe" -startup'
- [HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce] 'GrpConv' = 'grpconv -o'
- [HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'NSecAgent' = '"%CommonProgramFiles(x86)%\NSecsoft\NSec\NSecAgent.exe" -startup'
Sets the following service settings
- [HKLM\System\CurrentControlSet\Services\NSecRTS] 'Start' = '00000002'
- [HKLM\System\CurrentControlSet\Services\NSecRTS] 'ImagePath' = '%CommonProgramFiles(x86)%\NSecsoft\NSec\NSecRTS.exe -r'
- [HKLM\System\CurrentControlSet\Services\nsrawfilter] 'Start' = '00000001'
- [HKLM\System\CurrentControlSet\Services\nsrawfilter] 'ImagePath' = 'system32\drivers\nsrawfilter.sys'
- [HKLM\System\CurrentControlSet\Services\nFsFlt] 'ImagePath' = 'system32\DRIVERS\nFsFlt64.sys'
- [HKLM\System\CurrentControlSet\Services\NSecKrnl] 'ImagePath' = '%CommonProgramFiles(x86)%\NSecsoft\NSec\NSecKrnl64.sys'
- [HKLM\System\CurrentControlSet\Services\nsprotocolfilter] 'Start' = '00000001'
- [HKLM\System\CurrentControlSet\Services\nsprotocolfilter] 'ImagePath' = 'system32\drivers\nsprotocolfilter.sys'
Creates the following services
- 'NSecRTS' %CommonProgramFiles(x86)%\NSecsoft\NSec\NSecRTS.exe -r
- 'nsrawfilter' system32\drivers\nsrawfilter.sys
- 'nFsFlt' system32\DRIVERS\nFsFlt64.sys
- 'NSecKrnl' %CommonProgramFiles(x86)%\NSecsoft\NSec\NSecKrnl64.sys
- 'nsprotocolfilter' system32\drivers\nsprotocolfilter.sys
Malicious functions
Registers file system filter
- [HKLM\System\CurrentControlSet\Services\nFsFlt] 'Group' = 'FSFilter Activity Monitor'
Modifies file system
Creates the following files
- %TEMP%\nsbe14a.tmp
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nss\softokn3.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nss\smime3.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nss\plds4.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nss\plc4.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nss\nss3.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nss\nspr4.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nss\mozcrt19.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nss\certutil.exe
- %CommonProgramFiles(x86)%\nsecsoft\nsec\cer\netfiltersdk.cer
- %CommonProgramFiles(x86)%\nsecsoft\nsec\wpcap.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\webxml.dat
- %CommonProgramFiles(x86)%\nsecsoft\nsec\urllib.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\ssleay32.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\phlib64.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\phlib32.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\pcapt.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nvnserver.exe
- %TEMP%\nsmea60.tmp\nsexec.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nfsflt64.inf
- ctrlsmnsprotocolfilter
- %APPDATA%\nsec\debug\log\nsx64.exe_2024-03-25.log
- %APPDATA%\nsec\debug\log\iexplore.exe_2024-03-25.log
- %APPDATA%\nsec\debug\log\explorer.exe_2024-03-25.log
- %WINDIR%\temp\udd1dcf.tmp
- %WINDIR%\temp\udd1dbf.tmp
- <DRIVERS>\nsprotocolfilter.sys
- %APPDATA%\nsec\debug\log\grpconv.exe_2024-03-25.log
- %CommonProgramFiles(x86)%\nsecsoft\nsec\packet.dll
- D:\nsec\cache.ini
- C:\nsec\cache.ini
- %APPDATA%\nsec\debug\log\runonce.exe_2024-03-25.log
- %WINDIR%\temp\udd14d8.tmp
- %WINDIR%\temp\udd1489.tmp
- C:\nsec\debug\log\fixit.exe_2024-03-25.log
- C:\nsec\debug\log\nsecrts.exe_2024-03-25.log
- <DRIVERS>\setf6b.tmp
- <DRIVERS>\nsrawfilter.sys
- %APPDATA%\nsec\debug\log\rundll32.exe_2024-03-25.log
- %CommonProgramFiles(x86)%\nsecsoft\nsec\npf64.sys
- %APPDATA%\nsec\debug\log\nsecagent.exe_2024-03-25.log
- %CommonProgramFiles(x86)%\nsecsoft\nsec\npf.sys
- %CommonProgramFiles(x86)%\nsecsoft\nsec\screc.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\pcinfo.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\packetnt6.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\packetnt5.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nsx64.exe
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nshellext64.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nshellext32.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nsecrts.exe
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nseckrnl64.sys
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nseckrnl32.sys
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nsecagent.exe
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nfpcore.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\fixit.exe
- %CommonProgramFiles(x86)%\nsecsoft\nsec\dtcore64.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\dtcore32.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\detours64.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\detours32.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\config.exe
- %CommonProgramFiles(x86)%\nsecsoft\nsec\protocolfilters.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\showsth.exe
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nfapi.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\usbmgr.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\netfilter_wfp_win8_x86.sys
- %CommonProgramFiles(x86)%\nsecsoft\nsec\netfilter_wfp_win8_x64.sys
- %CommonProgramFiles(x86)%\nsecsoft\nsec\netfilter_wfp_win7_x86.sys
- %CommonProgramFiles(x86)%\nsecsoft\nsec\netfilter_wfp_win7_x64.sys
- %CommonProgramFiles(x86)%\nsecsoft\nsec\netfilter_tdi_xp_x86.sys
- %CommonProgramFiles(x86)%\nsecsoft\nsec\netfilter_tdi_xp_x64.sys
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nfsflt64.sys
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nfsflt32.sys
- %CommonProgramFiles(x86)%\nsecsoft\nsec\libeay32.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\libcurl.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\knurt.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\imau.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\htmlparser64.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\htmlparser32.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\devcon64.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\devcon32.dll
- %CommonProgramFiles(x86)%\nsecsoft\nsec\actag.dat
- %CommonProgramFiles(x86)%\nsecsoft\nsec\nfcore.dll
- ctrlsmnsrawfilter
Deletes the following files
- %TEMP%\nsmea60.tmp\nsexec.dll
- %WINDIR%\temp\udd1489.tmp
- %WINDIR%\temp\udd14d8.tmp
- %WINDIR%\temp\udd1dbf.tmp
- %WINDIR%\temp\udd1dcf.tmp
Moves the following files
- from <DRIVERS>\setf6b.tmp to <DRIVERS>\nfsflt64.sys
Modifies the following files
- %LOCALAPPDATA%\microsoft\windows\explorer\explorerstartuplog_runonce.etl
Network activity
Connects to
- 'localhost':59979
TCP
Other
- 'localhost':49185
Miscellaneous
Creates and executes the following
- '%CommonProgramFiles(x86)%\nsecsoft\nsec\config.exe' -ip
- '%CommonProgramFiles(x86)%\nsecsoft\nsec\nsecagent.exe'
- '%CommonProgramFiles(x86)%\nsecsoft\nsec\nsx64.exe'
- '%CommonProgramFiles(x86)%\nsecsoft\nsec\nsecrts.exe' -i
- '%CommonProgramFiles(x86)%\nsecsoft\nsec\nsecrts.exe' -r
- '%CommonProgramFiles(x86)%\nsecsoft\nsec\fixit.exe' -df
- '%CommonProgramFiles(x86)%\nsecsoft\nsec\config.exe' -ip' (with hidden window)
- '%CommonProgramFiles(x86)%\nsecsoft\nsec\nsx64.exe' ' (with hidden window)
- '%CommonProgramFiles(x86)%\nsecsoft\nsec\nsecrts.exe' -i' (with hidden window)
- '<SYSTEM32>\rundll32.exe' <SYSTEM32>\setupapi.dll,InstallHinfSection DefaultInstall 132 %CommonProgramFiles(x86)%\NSecsoft\NSec\nFsFlt64.inf' (with hidden window)
- '%CommonProgramFiles(x86)%\nsecsoft\nsec\fixit.exe' -df' (with hidden window)
- '%WINDIR%\syswow64\regsvr32.exe' /s "%CommonProgramFiles(x86)%\NSecsoft\NSec\NShellExt32.dll"' (with hidden window)
- '%WINDIR%\syswow64\regsvr32.exe' /s "%CommonProgramFiles(x86)%\NSecsoft\NSec\NShellExt64.dll"' (with hidden window)
- '%WINDIR%\syswow64\net.exe' start nFsFlt' (with hidden window)
Executes the following
- '<SYSTEM32>\rundll32.exe' <SYSTEM32>\setupapi.dll,InstallHinfSection DefaultInstall 132 %CommonProgramFiles(x86)%\NSecsoft\NSec\nFsFlt64.inf
- '<SYSTEM32>\runonce.exe' -r
- '<SYSTEM32>\grpconv.exe' -o
- '%WINDIR%\syswow64\regsvr32.exe' /s "%CommonProgramFiles(x86)%\NSecsoft\NSec\NShellExt32.dll"
- '%WINDIR%\syswow64\regsvr32.exe' /s "%CommonProgramFiles(x86)%\NSecsoft\NSec\NShellExt64.dll"
- '<SYSTEM32>\regsvr32.exe' /s "%CommonProgramFiles(x86)%\NSecsoft\NSec\NShellExt64.dll"
- '%WINDIR%\syswow64\net.exe' start nFsFlt
- '%WINDIR%\syswow64\net1.exe' start nFsFlt
