Sample Analysis instance
The sample is an executable file disguised as a wmv media file,
Using the wmvfile icon, because Windows does not display the extended name of the known file, the actual name of the target sample is wr.wmv.exe.
Analysis process:
1) create a Snapshot for restoration in the test environment. Ghost can be used in the test environment of the physical server for the same purpose.
2) Start InstallRite and ProcessMonitor in sequence, and configure Filter for ProcessMonitor first:
Programs that may be used by the target sample, such as labels.
Use InstallRite to take a snapshot of the system status:
Note: you can pause monitoring of ProcessMonitor when using InstallRite for snapshot.
3) Target running sample
The 4)processmonitorstatement shows that iexplore.exeand svchost.exe are started at the runtime of the target sample:
Use InstallRite to compare the system status before and after the target sample is executed. Select ReviewInstallation on the InstallRite interface to view the comparison result:
New file:
New registry key:
Deleted files:
2 files, paramstr.txtand svchost.exe, were created for the target sample in C: \ programfiles \ CommonFiles \ MicrosoftShared \ msinfo.pdf, and a service named Svchost was added. After the two operations are completed, the target sample deletes itself.
