FakeAV.Win32.FakeRean_118b4678fd

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Fake-AV creates the following process(es):

nkh.exe:1772
118b4678fd570914d12c4c6d2da77ae7.exe:692

The Fake-AV injects its code into the following process(es):

nkh.exe:1484

File activity

The process nkh.exe:1484 makes changes in a file system.

The Fake-AV creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Templates\7u6goy71bol4502j1soumxa6 (355 bytes)
%Documents and Settings%\%current user%\Local Settings\Application Data\7u6goy71bol4502j1soumxa6 (355 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\7u6goy71bol4502j1soumxa6 (355 bytes)
%Documents and Settings%\All Users\Application Data\7u6goy71bol4502j1soumxa6 (355 bytes)

The Fake-AV deletes the following file(s):

C:\118b4678fd570914d12c4c6d2da77ae7.exe (0 bytes)

The process 118b4678fd570914d12c4c6d2da77ae7.exe:692 makes changes in a file system.

The Fake-AV creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Application Data\nkh.exe (226 bytes)

Registry activity

The process nkh.exe:1484 makes changes in a system registry.

The Fake-AV creates and/or sets the following values in system registry:

[HKCU\Software\Classes\exefile\shell\open\command]
"(Default)" = "%Documents and Settings%\%current user%\Local Settings\Application Data\nkh.exe -a %1 %*"

[HKCU\Software\Classes\exefile\shell\runas\command]
"IsolatedCommand" = "%1 %*"

[HKCU\Software\Classes\exefile]
"(Default)" = "Application"

[HKCU\Software\Classes\.exe\shell\runas\command]
"IsolatedCommand" = "%1 %*"

[HKLM\SOFTWARE\Clients\StartMenuInternet]
"(Default)" = "IEXPLORE.EXE"

[HKCU\Software\Classes\exefile\shell\open\command]
"IsolatedCommand" = "%1 %*"

[HKCU\Software\Classes\.exe\shell\runas\command]
"(Default)" = "%1 %*"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Local AppData" = "%Documents and Settings%\%current user%\Local Settings\Application Data"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Templates" = "%Documents and Settings%\%current user%\Templates"

[HKCU\Software\Classes\exefile\shell\runas\command]
"(Default)" = "%1 %*"

[HKCU\Software\Classes\exefile]
"Content Type" = "application/x-msdownload"

[HKCU\Software\Classes\.exe\shell\open\command]
"IsolatedCommand" = "%1 %*"

[HKCU\Software\Classes\.exe]
"(Default)" = "exefile"

[HKLM\SOFTWARE\Clients\StartMenuInternet\IEXPLORE.EXE\shell\open\command]
"(Default)" = "%Documents and Settings%\%current user%\Local Settings\Application Data\nkh.exe -a %Program Files%\Internet Explorer\iexplore.exe"

[HKCU\Software\Classes\exefile\DefaultIcon]
"(Default)" = "%1"

[HKCU\Software\Microsoft\Windows]
"Identity" = "1785233727"

[HKCU\Software\Classes\.exe\shell\open\command]
"(Default)" = "%Documents and Settings%\%current user%\Local Settings\Application Data\nkh.exe -a %1 %*"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "B2 D7 D4 71 B9 A5 1C FA CF 01 11 67 4B 2D D5 F6"

[HKCU\Software\Classes\.exe\DefaultIcon]
"(Default)" = "%1"

[HKCU\Software\Classes\.exe]
"Content Type" = "application/x-msdownload"

To automatically run itself each time Windows is booted, the Fake-AV adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"ctfmon.exe" = "%System%\ctfmon.exe"

The process 118b4678fd570914d12c4c6d2da77ae7.exe:692 makes changes in a system registry.

The Fake-AV creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "01 DE 92 07 A4 48 59 A8 63 36 77 D0 0E D9 12 9B"

[HKLM\SOFTWARE\Microsoft\Security Center]
"AntiVirusOverride" = "1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Local AppData" = "%Documents and Settings%\%current user%\Local Settings\Application Data"

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile]
"DisableNotifications" = "1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Templates" = "%Documents and Settings%\%current user%\Templates"

[HKLM\SOFTWARE\Microsoft\Security Center]
"FirewallDisableNotify" = "1"

[HKLM\SOFTWARE\Microsoft\Security Center]
"UpdatesDisableNotify" = "1"

[HKLM\SOFTWARE\Microsoft\Security Center]
"FirewallOverride" = "1"

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile]
"EnableFirewall" = "0"

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile]
"DoNotAllowExceptions" = "0"

Antivirus notifications are disabled:

[HKLM\SOFTWARE\Microsoft\Security Center]
"AntiVirusDisableNotify" = "1"

A firewall is disabled:

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"EnableFirewall" = "0"

The following service is disabled:

[HKLM\System\CurrentControlSet\Services\SharedAccess]
"Start" = "4"

Firewall notifications are disabled:

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DisableNotifications" = "1"

Network activity (URLs)

URL	IP
hxxp://mutidajil.com/1015003913	208.73.211.193
vihuhosyde.com	Unresolvable
vujetejuvax.com	Unresolvable
qybolysusefim.com	Unresolvable
sewicyzinuhe.com	Unresolvable
lofocigeced.com	Unresolvable
sonewenazo.com	Unresolvable
wytasosivude.com	Unresolvable
fehosoxukyk.com	Unresolvable
huxeqatikicare.com	Unresolvable
bipojizikagec.com	Unresolvable
mixolyzegito.com	Unresolvable
holytewuzejuk.com	Unresolvable

Rootkit activity

No anomalies have been detected.

Propagation

Removals

Remove it with Ad-Aware

1. Click (here) to download and install Ad-Aware Free Antivirus.
2. Update the definition files.
3. Run a full scan of your computer.

Manual removal*

1. Terminate malicious process(es) (How to End a Process With the Task Manager):

   nkh.exe:1772
   118b4678fd570914d12c4c6d2da77ae7.exe:692
   

2. Delete the original Fake-AV file.
   
3. Delete or disinfect the following files created/modified by the Fake-AV:

   %Documents and Settings%\%current user%\Templates\7u6goy71bol4502j1soumxa6 (355 bytes)
   %Documents and Settings%\%current user%\Local Settings\Application Data\7u6goy71bol4502j1soumxa6 (355 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\7u6goy71bol4502j1soumxa6 (355 bytes)
   %Documents and Settings%\All Users\Application Data\7u6goy71bol4502j1soumxa6 (355 bytes)
   %Documents and Settings%\%current user%\Local Settings\Application Data\nkh.exe (226 bytes)

4. Delete the following value(s) in the autorun key (How to Work with System Registry):

   [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   "ctfmon.exe" = "%System%\ctfmon.exe"

5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
   
6. Reboot the computer.
   

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

Static Analysis

Network Activity

Map

Strings from Dumps