Trojan.DownLoader3.19289

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Kaseya Agent Service Helper' = '"%PROGRAM_FILES%\Kaseya\Agent\KaUsrTsk.exe"'

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\KaseyaAgent] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\KaseyaAgent] 'ImagePath' = '"%PROGRAM_FILES%\Kaseya\Agent\AgentMon.exe"'

Malicious functions:

Creates and executes the following:

%PROGRAM_FILES%\Kaseya\Agent\AgentMon.exe -s
%PROGRAM_FILES%\Kaseya\Agent\KaUsrTsk.exe
%CommonProgramFiles%\InstallShield\Engine\6\Intel 32\IKernel.exe /REGSERVER -Embedding -RegServer

Modifies file system :

Creates the following files:

%PROGRAM_FILES%\Kaseya\Agent\Agenefe9.rra
%PROGRAM_FILES%\Kaseya\Agent\KaUsefaa.rra
%PROGRAM_FILES%\Kaseya\Agent\KPrtef7b.rra
%PROGRAM_FILES%\Kaseya\Agent\kGetf066.rra
%PROGRAM_FILES%\Kaseya\Agent\KEvef131.rra
%PROGRAM_FILES%\Kaseya\Agent\Psapf0f2.rra
%PROGRAM_FILES%\Kaseya\Agent\sporf0d3.rra
%ALLUSERSPROFILE%\Start Menu\Programs\Kaseya\Kaseya Agent.lnk
%PROGRAM_FILES%\InstallShield Installation Information\{48C76121-4F90-11D5-9884-0050BA85A903}\dataeb36.rra
%PROGRAM_FILES%\InstallShield Installation Information\{48C76121-4F90-11D5-9884-0050BA85A903}\dataeb26.rra
%PROGRAM_FILES%\InstallShield Installation Information\{48C76121-4F90-11D5-9884-0050BA85A903}\layoeb07.rra
%PROGRAM_FILES%\InstallShield Installation Information\{48C76121-4F90-11D5-9884-0050BA85A903}\Setueb74.rra
%PROGRAM_FILES%\InstallShield Installation Information\{48C76121-4F90-11D5-9884-0050BA85A903}\Setup.ini
%PROGRAM_FILES%\InstallShield Installation Information\{48C76121-4F90-11D5-9884-0050BA85A903}\setuebb3.rra
%PROGRAM_FILES%\InstallShield Installation Information\{48C76121-4F90-11D5-9884-0050BA85A903}\Setueb93.rra
%PROGRAM_FILES%\Kaseya\Agent\LogPf160.rra
%PROGRAM_FILES%\Kaseya\Agent\custom\blink.ico
%PROGRAM_FILES%\Kaseya\Agent\custom\noremote.ico
%PROGRAM_FILES%\Kaseya\Agent\KaseyaD.ini
%PROGRAM_FILES%\Kaseya\Agent\custom\offline.ico
%PROGRAM_FILES%\Kaseya\Agent\AgentMon.log
%PROGRAM_FILES%\Kaseya\Agent\KasError.log
%PROGRAM_FILES%\Kaseya\Agent\custom\online.ico
<DRIVERS>\kasef400.rra
%PROGRAM_FILES%\Kaseya\Agent\Kasef2d7.rra
<SYSTEM32>\kasef21b.rra
%PROGRAM_FILES%\Kaseya\Agent\KAgef19e.rra
%PROGRAM_FILES%\Kaseya\Agent\Kasef306.rra
<DRIVERS>\kapff3e0.rra
<DRIVERS>\Kasef3c1.rra
<DRIVERS>\KaPFf3b1.rra
%TEMP%\pft3.tmp\setup.iss
%TEMP%\pft3.tmp\Setup.exe
%TEMP%\pft3.tmp\Setup.bmp
%TEMP%\pft3.tmp\data2.cab
%TEMP%\pft3.tmp\setup.inx
%TEMP%\pft3.tmp\Setup.ini
%TEMP%\pft3.tmp\layout.bin
%TEMP%\pft3.tmp\data1.hdr
%TEMP%\KaseyaD.ini
%TEMP%\KAgentSilent.exe
%TEMP%\KASetup.log
%TEMP%\ext2.tmp
%TEMP%\pft3.tmp\data1.cab
%TEMP%\pft3.tmp\pftw1.pkg
%TEMP%\plf1.tmp
%TEMP%\pft3.tmp\ikernel.ex_
%TEMP%\{48c76121-4f90-11d5-9884-0050ba85a903}\value29a.rra
%TEMP%\{48c76121-4f90-11d5-9884-0050ba85a903}\Psape23d.rra
%TEMP%\{48c76121-4f90-11d5-9884-0050ba85a903}\KSete20e.rra
%TEMP%\{48c76121-4f90-11d5-9884-0050ba85a903}\isrte2e9.rra
%TEMP%\pft3.tmp\setup.log
%TEMP%\{48c76121-4f90-11d5-9884-0050ba85a903}\_IsRe3a4.rra
%TEMP%\{48c76121-4f90-11d5-9884-0050ba85a903}\defae337.rra
%TEMP%\{48c76121-4f90-11d5-9884-0050ba85a903}\setue181.rra
%CommonProgramFiles%\InstallShield\Engine\6\Intel 32\cored4ee.rra
%CommonProgramFiles%\InstallShield\Engine\6\Intel 32\temp.000
%TEMP%\IEC4.tmp
%CommonProgramFiles%\InstallShield\Engine\6\Intel 32\ctord52d.rra
%CommonProgramFiles%\InstallShield\IScript\iscrd9a2.rra
%CommonProgramFiles%\InstallShield\Engine\6\Intel 32\iused721.rra
%CommonProgramFiles%\InstallShield\Engine\6\Intel 32\objed6d3.rra