Trojan.DownLoader26.11645

Technical Information

Malicious functions

Reads files which store third party applications passwords

%APPDATA%\mozilla\firefox\profiles.ini
%LOCALAPPDATA%\google\chrome\user data\default\web data
%LOCALAPPDATA%\google\chrome\user data\default\login data
%APPDATA%\opera software\opera stable\login data

Modifies file system

Creates the following files

%APPDATA%\v1.exe
%TEMP%\costura.leaf.xnet.dll.compressed
%TEMP%\costura.microsoft.bcl.asyncinterfaces.dll.compressed
%TEMP%\costura.netstandard.dll.compressed
%TEMP%\costura.newtonsoft.json.dll.compressed
%TEMP%\costura.system.buffers.dll.compressed
%TEMP%\costura.system.collections.immutable.dll.compressed
%TEMP%\costura.system.drawing.common.dll.compressed
%TEMP%\costura.system.interactive.async.dll.compressed
%TEMP%\costura.system.linq.async.dll.compressed
%TEMP%\costura.system.memory.dll.compressed
%TEMP%\costura.system.numerics.vectors.dll.compressed
%TEMP%\whysosad
%TEMP%\costura.system.runtime.compilerservices.unsafe.dll.compressed
%TEMP%\costura.metadata
%TEMP%\ss.png
%TEMP%\compile.bat
%TEMP%\compile.vbs
%ALLUSERSPROFILE%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\policy.vpol
%ALLUSERSPROFILE%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\3ccd5499-87a8-4b10-a215-608888dd3b55.vsch
%ALLUSERSPROFILE%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\2f1a6504-0641-44cf-8bb5-3612d865f2e5.vsch
%LOCALAPPDATA%\microsoft\vault\4bf4c442-9b8a-41a0-b380-dd4a704ddb28\policy.vpol
%TEMP%\user_passwords.txt
%TEMP%\cookies3
%TEMP%\cookies2
%TEMP%\costura.dotnetzip.dll.compressed
%TEMP%\costura.dotnetzip.pdb.compressed
%TEMP%\costura.discord.net.webhook.dll.compressed
%TEMP%\costura.discord.net.rest.dll.compressed
%TEMP%\costura.discord.net.core.dll.compressed
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\desktop.ini
%LOCALAPPDATA%\microsoft\windows\history\low\desktop.ini
%LOCALAPPDATA%\microsoft\windows\history\low\history.ie5\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\index.dat
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\dwwzz7qp\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\bnav4fdw\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\s04t6xen\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\506e54ko\desktop.ini
%APPDATA%\microsoft\windows\cookies\low\index.dat
%LOCALAPPDATA%\microsoft\windows\history\low\history.ie5\index.dat
%TEMP%\cookies1
%TEMP%\costura.system.threading.tasks.extensions.dll.compressed
%TEMP%\config
%TEMP%\bfsvc.cfg
%TEMP%\xwizard.cfg
%TEMP%\bfsvc.exe
%TEMP%\winhlp32.exe
%TEMP%\hh.exe
%TEMP%\splwow64.exe
%TEMP%\xwizard.exe
%TEMP%\snuvcdsm.exe
%TEMP%\costura.costura.dll.compressed
%TEMP%\costura.costura.pdb.compressed
%TEMP%\costura.discord webhook.dll.compressed
%APPDATA%\ตัวแข็ง+ทะลุ holy.exe
%TEMP%\rtkbtmanserv.exe
%TEMP%\user_cookies.txt

Sets the 'hidden' attribute to the following files

%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\dwwzz7qp\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\bnav4fdw\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\s04t6xen\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\506e54ko\desktop.ini
%LOCALAPPDATA%\microsoft\windows\history\low\history.ie5\desktop.ini

Deletes the following files

%TEMP%\ss.png
%TEMP%\costura.dotnetzip.dll.compressed
%TEMP%\costura.dotnetzip.pdb.compressed
%TEMP%\costura.leaf.xnet.dll.compressed
%TEMP%\costura.metadata
%TEMP%\costura.microsoft.bcl.asyncinterfaces.dll.compressed
%TEMP%\costura.netstandard.dll.compressed
%TEMP%\costura.discord.net.rest.dll.compressed
%TEMP%\costura.discord.net.webhook.dll.compressed
%TEMP%\costura.newtonsoft.json.dll.compressed
%TEMP%\costura.system.drawing.common.dll.compressed
%TEMP%\costura.system.interactive.async.dll.compressed
%TEMP%\costura.system.linq.async.dll.compressed
%TEMP%\costura.system.memory.dll.compressed
%TEMP%\costura.system.numerics.vectors.dll.compressed
%TEMP%\costura.system.runtime.compilerservices.unsafe.dll.compressed
%TEMP%\costura.system.buffers.dll.compressed
%TEMP%\costura.system.collections.immutable.dll.compressed
%TEMP%\costura.discord.net.core.dll.compressed
%TEMP%\costura.discord webhook.dll.compressed
%TEMP%\costura.costura.pdb.compressed
%TEMP%\compile.vbs
%TEMP%\cookies1
%TEMP%\cookies2
%TEMP%\cookies3
%TEMP%\user_cookies.txt
%TEMP%\config
%TEMP%\xwizard.exe
%TEMP%\compile.bat
%TEMP%\splwow64.exe
%TEMP%\snuvcdsm.exe
%TEMP%\hh.exe
%TEMP%\bfsvc.cfg
%TEMP%\bfsvc.exe
%TEMP%\whysosad
%TEMP%\xwizard.cfg
%TEMP%\costura.costura.dll.compressed
%TEMP%\winhlp32.exe
%TEMP%\costura.system.threading.tasks.extensions.dll.compressed
%TEMP%\rtkbtmanserv.exe

Modifies the following files

Substitutes the following files

%TEMP%\compile.bat
%TEMP%\compile.vbs

Network activity

Connects to

'ra#.####ubusercontent.com':443
'ap###.ipify.org':443
'microsoft.com':80
'di##ord.com':443

TCP

HTTP GET requests

http://www.microsoft.com/pki/certs/MicRooCerAut_2010-06-23.crt

Other

'ra#.####ubusercontent.com':443
'ap###.ipify.org':443
'di##ord.com':443

UDP

DNS ASK ra#.####ubusercontent.com
DNS ASK it####lvehacker.gq
DNS ASK ap###.ipify.org
DNS ASK microsoft.com
DNS ASK di##ord.com

Miscellaneous

Creates and executes the following

'%APPDATA%\v1.exe'
'%APPDATA%\ตัวแข็ง+ทะลุ holy.exe'
'%TEMP%\rtkbtmanserv.exe' ZhXl39BlhP84+Y4kurA8wpehxxqA0X22IMYZ6Vpiqs5XBLI/EjNfvK7Os96aMoR/T7VzbUs8kJ4Ca+1rVZGeSSYozxkdhYOl5sEuQ806c+iZRFjQQSlQg+HYyXDsLnuNT91OL2E40a5n1seMEdMlKo41e3f2Te4j+Wr40GG27C0=
'<SYSTEM32>\wscript.exe' "%TEMP%\compile.vbs"
'%TEMP%\bfsvc.exe' /capture /Filename "%TEMP%\capture.png"
'%TEMP%\snuvcdsm.exe' /stext "%TEMP%\user_Passwords.txt"
'%TEMP%\winhlp32.exe' /stext "%TEMP%\Cookies1"
'%TEMP%\splwow64.exe' /stext "%TEMP%\Cookies2"
'%TEMP%\hh.exe' /stext "%TEMP%\Cookies3"
'%TEMP%\xwizard.exe' /stext "%TEMP%\user_History.txt"
'<SYSTEM32>\cmd.exe' /c compile.bat' (with hidden window)
'<SYSTEM32>\cmd.exe' /C choice /C Y /N /D Y /T 3 & Del "%TEMP%\RtkBtManServ.exe"' (with hidden window)

Executes the following

'<SYSTEM32>\rundll32.exe' "<SYSTEM32>\WININET.dll",DispatchAPICall 1
'<SYSTEM32>\cmd.exe' /c compile.bat
'<SYSTEM32>\wscript.exe' "%TEMP%\compile.vbs"
'<SYSTEM32>\cmd.exe' /C choice /C Y /N /D Y /T 3 & Del "%TEMP%\RtkBtManServ.exe"
'<SYSTEM32>\choice.exe' /C Y /N /D Y /T 3