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Win32.HLLW.Autoruner2.53903

Added to the Dr.Web virus database: 2019-07-28

Virus description added: 2019-07-30

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'ljyeq' = '%HOMEPATH%\ljyeq.exe /j'

Creates the following files on removable media

<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\dial.exe
<Drive name for removable media>:\rcx9.tmp
<Drive name for removable media>:\dashborder_96.exe
<Drive name for removable media>:\rcx8.tmp
<Drive name for removable media>:\toolbar.exe
<Drive name for removable media>:\rcx7.tmp
<Drive name for removable media>:\default.exe
<Drive name for removable media>:\rcx6.tmp
<Drive name for removable media>:\dashborder_192.exe
<Drive name for removable media>:\rcx5.tmp
<Drive name for removable media>:\tileimage.exe
<Drive name for removable media>:\rcx4.tmp
<Drive name for removable media>:\dashborder_144.exe
<Drive name for removable media>:\rcx3.tmp
<Drive name for removable media>:\dialmap.exe
<Drive name for removable media>:\rcx2.tmp
<Drive name for removable media>:\rcx1.tmp
<Drive name for removable media>:\delete.exe
<Drive name for removable media>:\ljyeq.exe
<Drive name for removable media>:\rcxa.tmp
<Drive name for removable media>:\hanni_umami_chapter.exe

Malicious functions

To complicate detection of its presence in the operating system,

forces the system hide from view:

hidden files

Modifies file system

Creates the following files

%HOMEPATH%\ljyeq.exe

Sets the 'hidden' attribute to the following files

%HOMEPATH%\ljyeq.exe
<Drive name for removable media>:\autorun.inf

Deletes the following files

<Drive name for removable media>:\delete.exe
<Drive name for removable media>:\dialmap.exe
<Drive name for removable media>:\dashborder_144.exe
<Drive name for removable media>:\tileimage.exe
<Drive name for removable media>:\dashborder_192.exe
<Drive name for removable media>:\default.exe
<Drive name for removable media>:\toolbar.exe
<Drive name for removable media>:\dashborder_96.exe
<Drive name for removable media>:\dial.exe

Substitutes the following files

<Drive name for removable media>:\delete.exe
<Drive name for removable media>:\dialmap.exe
<Drive name for removable media>:\dashborder_144.exe
<Drive name for removable media>:\tileimage.exe
<Drive name for removable media>:\dashborder_192.exe
<Drive name for removable media>:\default.exe
<Drive name for removable media>:\toolbar.exe
<Drive name for removable media>:\dashborder_96.exe
<Drive name for removable media>:\dial.exe

Network activity

Connects to

'255.255.255.255':8003

UDP

DNS ASK ns#.##ayer1352.com
DNS ASK ns#.##ayer1352.net
DNS ASK ns#.##ayer1352.org

Miscellaneous

Creates and executes the following

'%HOMEPATH%\ljyeq.exe'