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Trojan.Siggen33.35077
Added to the Dr.Web virus database:
2026-08-12
Virus description added:
2026-08-14
Technical Information
Triggers a user-defined sigma rule:
4fc0deee-0057-4998-ab31-d24e46e0aba4
20f0ee37-5942-4e45-b7d5-c5b5db9df5cd
92626ddd-662c-49e3-ac59-f6535f12d189
7a02e22e-b885-4404-b38b-1ddc7e65258a
81325ce1-be01-4250-944f-b4789644556f
16a4c7b3-4681-49d0-8d58-3e9b796dcb43
d223b46b-5621-4037-88fe-fda32eead684
To ensure autorun and distribution
Modifies the following registry keys
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'WindowsLockHost' = '%LOCALAPPDATA%\jhg9zpwkig\LockAppHost.exe'
Creates or modifies the following files
<SYSTEM32>\tasks\windowslockhost
Modifies file system
Creates the following files
%TEMP%\is-s9kif.tmp\<File name>.tmp
%TEMP%\is-ntset.tmp\_isetup\_setup64.tmp
%LOCALAPPDATA%\jhg9zpwkig\is-q5osm.tmp
%LOCALAPPDATA%\jhg9zpwkig\is-h8tit.tmp
%LOCALAPPDATA%\jhg9zpwkig\is-rsdo5.tmp
%LOCALAPPDATA%\jhg9zpwkig\is-nf21m.tmp
%LOCALAPPDATA%\jhg9zpwkig\is-8p0tk.tmp
%LOCALAPPDATA%\jhg9zpwkig\is-dv26g.tmp
%LOCALAPPDATA%\jhg9zpwkig\unins000.dat
%LOCALAPPDATA%\jhg9zpwkig\lockapp_debug.log
%TEMP%\svc_log.tmp
%TEMP%\hx_agent_debug.log
%LOCALAPPDATA%\packages\microsoft.zunevideo_8wekyb3d8bbwe\ac\microsoft\cryptneturlcache\metadata\77ec63bda74bd0d0e0426dc8f8008506
%LOCALAPPDATA%\packages\microsoft.zunevideo_8wekyb3d8bbwe\ac\microsoft\cryptneturlcache\metadata\57c8edb95df3f0ad4ee2dc2b8cfd4157
%LOCALAPPDATA%\packages\microsoft.zunevideo_8wekyb3d8bbwe\ac\microsoft\cryptneturlcache\metadata\fb0d848f74f70bb2eaa93746d24d9749
%LOCALAPPDATA%\packages\microsoft.zunevideo_8wekyb3d8bbwe\ac\microsoft\cryptneturlcache\metadata\23566aa11ef6f77f638b3398b3bcc6a5_2bb724b124e2bd148ea57d3e5ad49a6c
%LOCALAPPDATA%\packages\microsoft.zunevideo_8wekyb3d8bbwe\ac\microsoft\cryptneturlcache\metadata\26c212d9399727259664bdfca073966e_912c3ca51de6018a7be4ca7bc64aafcd
%LOCALAPPDATA%\packages\microsoft.zunevideo_8wekyb3d8bbwe\ac\microsoft\cryptneturlcache\metadata\892580777767344dcaef580ffa143ea6_ef1b61dd3f93c58dbd0734f13c15c0f6
%LOCALAPPDATA%\packages\microsoft.zunevideo_8wekyb3d8bbwe\ac\microsoft\cryptneturlcache\metadata\b76be66d46c355931939d8cf818d03fd_39df7432e6ef50cda9c936e29e7da30d
%LOCALAPPDATA%\packages\microsoft.zunevideo_8wekyb3d8bbwe\ac\microsoft\cryptneturlcache\metadata\b76be66d46c355931939d8cf818d03fd_879afeb08dcb012707582d902977ff92
%LOCALAPPDATA%\packages\microsoft.zunevideo_8wekyb3d8bbwe\ac\microsoft\cryptneturlcache\metadata\e2c6cbaf0af08cf203ba74bf0d0ab6d5_eaf5d55d93603a879fa973006301f24f
%LOCALAPPDATA%\packages\microsoft.zunevideo_8wekyb3d8bbwe\ac\microsoft\cryptneturlcache\content\fb0d848f74f70bb2eaa93746d24d9749
Deletes following files that it created itself
%TEMP%\is-ntset.tmp\_isetup\_setup64.tmp
%TEMP%\is-s9kif.tmp\<File name>.tmp
Moves the following files
from %LOCALAPPDATA%\jhg9zpwkig\is-q5osm.tmp to %LOCALAPPDATA%\jhg9zpwkig\unins000.exe
from %LOCALAPPDATA%\jhg9zpwkig\is-h8tit.tmp to %LOCALAPPDATA%\jhg9zpwkig\lockhostingframework.dll
from %LOCALAPPDATA%\jhg9zpwkig\is-rsdo5.tmp to %LOCALAPPDATA%\jhg9zpwkig\msiexec.dll
from %LOCALAPPDATA%\jhg9zpwkig\is-nf21m.tmp to %LOCALAPPDATA%\jhg9zpwkig\wbem.dll
from %LOCALAPPDATA%\jhg9zpwkig\is-8p0tk.tmp to %LOCALAPPDATA%\jhg9zpwkig\lockapphost.exe
from %LOCALAPPDATA%\jhg9zpwkig\is-dv26g.tmp to %LOCALAPPDATA%\jhg9zpwkig\decoy_8707846915.mp4
Network activity
Connects to
'47.##.51.107':9527
'se######-ssl.xboxlive.com':443
'go.microsoft.com':443
'10#.#51.135.62':80
'oneocsp.microsoft.com':80
'activation.playready.microsoft.com':443
TCP
HTTP GET requests
http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?d3##############
http://oneocsp.microsoft.com/ocsp/MFQwUjBQME4wTDAJBgUrDgMCGgUABBQVgJZqCZ3Nr22JSLELeNxL%2F2feVwQUVAy87Bj3ffED4oS%2BNGREZ891H2UCE0MAVFZs%2FK8fYsU8Pd4AAABUVmw%3D
HTTP POST requests
http://47.##.51.107/api/v1/sync
Other
'47.##.51.107':9527
'se######-ssl.xboxlive.com':443
'go.microsoft.com':443
'activation.playready.microsoft.com':443
UDP
DNS ASK se######-ssl.xboxlive.com
DNS ASK go.microsoft.com
DNS ASK oneocsp.microsoft.com
DNS ASK activation.playready.microsoft.com
Miscellaneous
Searches for the following windows
ClassName: 'NarratorUIClass' WindowName: ''
Creates and executes the following
'%TEMP%\is-s9kif.tmp\<File name>.tmp' /SL5="$B02A6,3191790,826880,<Full path to file>"
'%LOCALAPPDATA%\jhg9zpwkig\lockapphost.exe'
Executes the following
'%WINDIR%\syswow64\schtasks.exe' /create /f /tn "WindowsLockHost" /tr ""%LOCALAPPDATA%\jhg9zpwkig\LockAppHost.exe"" /sc onlogon /rl highest
'%ProgramFiles%\windowsapps\microsoft.zunevideo_10.19071.19011.0_x64__8wekyb3d8bbwe\video.ui.exe' -ServerName:Microsoft.ZuneVideo.AppX758ya5sqdjd98rx6z7g95nw6jy7bqx9y.mca
'<SYSTEM32>\svchost.exe' -k appmodel -p -s camsvc
'<SYSTEM32>\svchost.exe' -k LocalSystemNetworkRestricted -p -s DisplayEnhancementService
'%LOCALAPPDATA%\jhg9zpwkig\lockapphost.exe' ' (with hidden window)
'%WINDIR%\syswow64\schtasks.exe' /create /f /tn "WindowsLockHost" /tr ""%LOCALAPPDATA%\jhg9zpwkig\LockAppHost.exe"" /sc onlogon /rl highest' (with hidden window)
Curing recommendations
Windows
macOS
Linux
Android
If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space .
If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
Switch off your device and turn it on as normal.
Find out more about Dr.Web for Android
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