Trojan.DownLoader4.11601

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SYSTEM\ControlSet001\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000004] 'PackedCatalogItem' = ''
[<HKLM>\SYSTEM\ControlSet001\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000005] 'PackedCatalogItem' = ''
[<HKLM>\SYSTEM\ControlSet001\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000003] 'PackedCatalogItem' = ''
[<HKLM>\SYSTEM\ControlSet001\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000001] 'PackedCatalogItem' = ''
[<HKLM>\SYSTEM\ControlSet001\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000002] 'PackedCatalogItem' = ''

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\NetHomeIDE] 'Start' = '00000002'

Malicious functions:

Creates and executes the following:

%PROGRAM_FILES%\baidu\setup953631.exe /VERYSILENT /NORESTART
%PROGRAM_FILES%\baidu\dsetup.exe install
%PROGRAM_FILES%\baidu\ipseccmd.exe -p Block7 -r Block7 -f 125.39.102.*+0 -n BLOCK -x -p Block6 -r Block6 -f 125.39.100.*+0 -n BLOCK -x -p Block8 -r Block8 -f 220.181.126.*+0 -n BLOCK -x -p Block0 -r Block0 -f 118.145.31.*+0 -n BLOCK -x -p Block9 -r Block9 -f 221.194.142.*+0 -n BLOCK -x -p Block2 -r BlockNEW -f 119.188.4.*+0 -n BLOCK -x -p Block1 -r BlockTCP -f 119.147.91.*+0 -n BLOCK -x -p Block3 -r BlockTWO -f 122.70.130.*+0 -n BLOCK -x -p Block5 -r Block5 -f 124.238.244.*+0 -n BLOCK -x -p Block4 -r BlockTHREE -f 124.238.243.*+0 -n BLOCK -x
<Current directory>\uuse-5482.exe
%PROGRAM_FILES%\baidu\msfsg.exe md5 -s spass.dll -d spass.dll md5 -s dsetup.exe -d dsetup.exe md5 -s sumpod-nos.sys -d sumpod-nos.sys md5 -s newnetgar.dll -d newnetgar.dll md5 -s ipseccmd.exe -d ipseccmd.exe -l 10000000 uncompress -s s0001.xml -d ipseccmd.exe md5 -s passthru.dll -d passthru.dll uncompress -s dsop7.xml -d setup953631.exe

Executes the following:

<SYSTEM32>\rundll32.exe <SYSTEM32>\idecomp.dll RundllInstall NetHomeIDE
<SYSTEM32>\svchost.exe -k mysysgroup3
<SYSTEM32>\sc.exe start PolicyAgent
<SYSTEM32>\runonce.exe -r

Modifies file system :

Creates the following files:

<SYSTEM32>\hardpol\MyIEData\main.ini
%PROGRAM_FILES%\baidu\is-CUJT8.tmp
%PROGRAM_FILES%\baidu\is-19E9K.tmp
%PROGRAM_FILES%\baidu\passthru.dll
%PROGRAM_FILES%\baidu\newnetgar.dll
%PROGRAM_FILES%\baidu\spass.dll
%PROGRAM_FILES%\baidu\dsetup.exe
%PROGRAM_FILES%\baidu\is-T6E1O.tmp
%PROGRAM_FILES%\baidu\is-K64BN.tmp
%PROGRAM_FILES%\baidu\is-B8M32.tmp
%PROGRAM_FILES%\baidu\is-8JR2C.tmp
%PROGRAM_FILES%\baidu\is-BGNHB.tmp
%PROGRAM_FILES%\baidu\is-1HUG0.tmp
%PROGRAM_FILES%\baidu\is-UO0TN.tmp
%PROGRAM_FILES%\baidu\is-VSQGN.tmp
%APPDATA%\MyIEData\main.ini
<DRIVERS>\SET15.tmp
<SYSTEM32>\SET14.tmp
<SYSTEM32>\idecomp.dll
<DRIVERS>\sumpod.sys
<SYSTEM32>\hardpol\MyIEData\SysDat.bin
<SYSTEM32>\hardpol\hardpol.dll
%WINDIR%\inf\INFCACHE.0
%APPDATA%\Microsoft\Crypto\RSA\S-1-5-21-1275210071-117609710-1801674531-500\a18ca4003deb042bbee7a40f15e1970b_ffcb838e-6d3b-4e44-a259-8ac8f5c94c4f
%APPDATA%\Microsoft\Protect\S-1-5-21-1275210071-117609710-1801674531-500\66bcf8b3-5e06-4914-88e2-80d303bcebb5
%PROGRAM_FILES%\baidu\sumpod-nos.sys
%WINDIR%\inf\oem15.inf
%WINDIR%\inf\oem16.PNF
%WINDIR%\inf\oem16.inf
%WINDIR%\inf\oem15.PNF
%TEMP%\is-OBHPG.tmp\spass.dll
%TEMP%\nsm4.tmp\ioSpecial.ini
%TEMP%\nse2.tmp\Internet.dll
%TEMP%\nse2.tmp\AccessControl.dll
%TEMP%\nsm4.tmp\modern-wizard.bmp
%TEMP%\nse2.tmp\nsExec.dll
%PROGRAM_FILES%\baidu\ipseccmd.exe
%TEMP%\nsm4.tmp\InstallOptions.dll
%TEMP%\nse2.tmp\nsRandom.dll
%PROGRAM_FILES%\baidu\s0001.xml
%PROGRAM_FILES%\baidu\msfsg.exe
%PROGRAM_FILES%\baidu\dsop7.xml
<Current directory>\uuse-5482.exe
%PROGRAM_FILES%\baidu\un1202103501865.exe
%PROGRAM_FILES%\baidu\temp555.ini
%TEMP%\nse2.tmp\System.dll
%TEMP%\nse2.tmp\nsF.tmp
%TEMP%\nse2.tmp\nsE.tmp
%TEMP%\nse2.tmp\nsD.tmp
%PROGRAM_FILES%\baidu\setup953631.exe
%TEMP%\is-OBHPG.tmp\_isetup\_shfoldr.dll
%TEMP%\is-OBHPG.tmp\_isetup\_RegDLL.tmp
%TEMP%\is-505K8.tmp\setup953631.tmp
%TEMP%\nse2.tmp\nsC.tmp
%TEMP%\nse2.tmp\ns7.tmp
%TEMP%\nse2.tmp\ns6.tmp
%TEMP%\nse2.tmp\ns5.tmp
%TEMP%\nse2.tmp\ns8.tmp
%TEMP%\nse2.tmp\nsB.tmp
%TEMP%\nse2.tmp\nsA.tmp
%TEMP%\nse2.tmp\ns9.tmp