Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'drvsyskit' = '%APPDATA%\drivers\winupgro.exe'
Creates the following services:
- [<HKLM>\SYSTEM\ControlSet001\Services\srosa] 'Start' = '00000001'
- [<HKLM>\SYSTEM\ControlSet001\Services\sK9Ou0s] 'Start' = '00000001'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
- User Account Control (UAC)
Creates and executes the following:
- %APPDATA%\drivers\winupgro.exe
Terminates or attempts to terminate
the following user processes:
- fsavaui.exe
- fsav32.exe
- GUARD.EXE
- fsavgui.exe
- fsav.exe
- ecmd.exe
- Drwebwcl.exe
- ekrn.exe
- egni.exe
- zlclient.exe
- spidernt.exe
- mpftray.exe
- ZONEALARM.EXE
- smc.exe
- NAVAPW32.EXE
- MCAGENT.EXE
- outpost.exe
- nod32.exe
- Drwebupw.exe
- AVP.EXE
- AVGCTRL.EXE
- AVPCC.EXE
- AVP32.EXE
- AVGCC32.EXE
- ashAvast.exe
- ash.exe
- avgcc.exe
- ashAvSrv.exe
- ClamWin.exe
- ccapp.exe
- drweb386.exe
- Drweb32w.exe
- bdsubmit.exe
- AVSYNMGR.EXE
- AVPM.EXE
- bdss.exe
- bdagent.exe
Searches for windows to
detect analytical utilities:
- ClassName: '' WindowName: 'Process Monitor - Sysinternals: www.sysinternals.com'
- ClassName: 'PROCMON_WINDOW_CLASS' WindowName: ''
- ClassName: '' WindowName: 'Registry Monitor - Sysinternals: www.sysinternals.com'
- ClassName: 'RegmonClass' WindowName: ''
- ClassName: '' WindowName: 'File Monitor - Sysinternals: www.sysinternals.com'
- ClassName: 'GBDYLLO' WindowName: ''
- ClassName: 'OLLYDBG' WindowName: ''
- ClassName: 'FilemonClass' WindowName: ''
- ClassName: 'pediy06' WindowName: ''
Restores hooked functions in System Service Descriptor Table (SSDT).
Hides the following processes:
- %APPDATA%\drivers\winupgro.exe
Modifies file system :
Creates the following files:
- %APPDATA%\drivers\wfsintwq.sys
- %APPDATA%\drivers\srosa2.sys
- %APPDATA%\drivers\winupgro.exe
Network activity:
Connects to:
- 'ab##erm.sk':80
- 'localhost':1038
- '74.##5.232.51':80
TCP:
HTTP GET requests:
- ab##erm.sk/xyz.php?cr#####
UDP:
- DNS ASK ab##erm.sk
- DNS ASK google.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
- ClassName: 'AavmMessageClass' WindowName: ''
- ClassName: '18467-41' WindowName: ''
