Technical Information
To ensure autorun and distribution
Creates the following services
- [<HKLM>\System\CurrentControlSet\Services\gramblrclient] 'Start' = '00000002'
- [<HKLM>\System\CurrentControlSet\Services\gramblrclient] 'ImagePath' = '%ProgramFiles%\Gramblr\gramblr.exe'
Malicious functions
Injects code into
the following user processes:
- chrome.exe
Modifies file system
Creates the following files
- %PROGRAMDATA%\gramblr\gramblr.db-journal
- %PROGRAMDATA%\gramblr\gramblr.db
- %TEMP%\etilqs_w2wuarlritm4qjv
- %TEMP%\etilqs_smub1b6fr7n0ygq
- %TEMP%\etilqs_qczafmqnwdq54hx
- %ProgramFiles%\gramblr\gramblr.exe
- %PROGRAMDATA%\microsoft\windows\start menu\programs\gramblr.lnk
- %WINDIR%\temp\etilqs_jmsx9cejc0rfsza
- %WINDIR%\temp\etilqs_fznveyo1rdv0rz3
- %WINDIR%\temp\etilqs_egjtvurtmgeckgl
- %PROGRAMDATA%\gramblr\sessions.db-journal
- %PROGRAMDATA%\gramblr\sessions.db
- %PROGRAMDATA%\gramblr\chrome.vbs
Deletes the following files
- %PROGRAMDATA%\gramblr\gramblr.db-journal
- %PROGRAMDATA%\gramblr\sessions.db-journal
Substitutes the following files
- %PROGRAMDATA%\gramblr\gramblr.db-journal
- %PROGRAMDATA%\gramblr\sessions.db-journal
Network activity
Connects to
- 'localhost':4343
TCP
HTTP GET requests
- http://lo###host:4343/api/configuration
- http://lo###host:4343/
UDP
- DNS ASK ap#.##amblrr.com
- DNS ASK clients2.google.com
- DNS ASK clients4.google.com
- DNS ASK google.com
- DNS ASK go##le.ru
- DNS ASK go###eapis.com
- DNS ASK tr######e.googleapis.com
- DNS ASK gs##tic.com
- DNS ASK ap#.#ramblr.com
- DNS ASK clients3.google.com
Miscellaneous
Searches for the following windows
- ClassName: 'Chrome_MessageWindow' WindowName: '<LS_APPDATA>\Google\Chrome\User Data'
Creates and executes the following
- '%ProgramFiles%\gramblr\gramblr.exe'
- '<SYSTEM32>\wscript.exe' "%PROGRAMDATA%\Gramblr\chrome.vbs"
Executes the following
- '<SYSTEM32>\cmd.exe' /C "powercfg.exe -SETACVALUEINDEX SCHEME_CURRENT SUB_SLEEP bd3b718a-0680-4d9d-8ab2-e1d2b4ac806d 1"
- '<SYSTEM32>\powercfg.exe' -SETACVALUEINDEX SCHEME_CURRENT SUB_SLEEP bd3b718a-0680-4d9d-8ab2-e1d2b4ac806d 1
- '<SYSTEM32>\cmd.exe' /C "wscript "%PROGRAMDATA%\Gramblr\chrome.vbs""
- '%ProgramFiles(x86)%\google\chrome\application\chrome.exe' --app=http://lo###host:4343/ --app-shell-host-window-size=1010,689 --window-position=71,87
- '%ProgramFiles(x86)%\google\chrome\application\chrome.exe' --type=gpu-process --channel="1648.0.2123736782\13178119" --supports-dual-gpus=false --gpu-driver-bug-workarounds=1,19,42 --gpu-vendor-id=0x0000 --gpu-device-id=0x0000 --gpu-driver-vendor --gpu...
- '%ProgramFiles(x86)%\google\chrome\application\chrome.exe' --type=renderer --enable-deferred-image-decoding --lang=ru --force-fieldtrials="BackgroundRendererProcesses/Disallow/BrowserBlacklist/Enabled/*CTRequiredForEVTrial/RequirementEnforced/CaptivePo...
- '%ProgramFiles(x86)%\google\chrome\application\chrome.exe' --type=renderer --enable-deferred-image-decoding --lang=ru --force-fieldtrials="BackgroundRendererProcesses/Disallow/*BrowserBlacklist/Enabled/*CTRequiredForEVTrial/RequirementEnforced/CaptiveP...
