SpyTool.Win32.Ardamax_967b5f6cf7

Dynamic Analysis

Payload

Behaviour	Description
EmailWorm	Worm can send e-mails.

Process activity

The SpyTool creates the following process(es):

967b5f6cf732bf40409a01732ef74e5a.exe:1040

The SpyTool injects its code into the following process(es):

SOS.exe:656

File activity

The process SOS.exe:656 makes changes in a file system.

The SpyTool creates and/or writes to the following file(s):

%Documents and Settings%\All Users\Application Data\SUS\Screen_2013-08-24_16-54-34.jpg (707 bytes)
%Documents and Settings%\All Users\Application Data\SUS\SOS.005 (1944 bytes)
%Documents and Settings%\All Users\Application Data\SUS\2013-08-24_16-54-34.005 (157 bytes)
%Documents and Settings%\All Users\Application Data\SUS\Screen_2013-08-24_16-54-34.html (791 bytes)

The SpyTool deletes the following file(s):

%Documents and Settings%\All Users\Application Data\SUS\Screen_2013-08-24_16-54-34.jpg (0 bytes)
%Documents and Settings%\All Users\Application Data\SUS\Screen_2013-08-24_16-54-34.html (0 bytes)

The process 967b5f6cf732bf40409a01732ef74e5a.exe:1040 makes changes in a file system.

The SpyTool creates and/or writes to the following file(s):

%Documents and Settings%\All Users\Application Data\ACLHCX\SOS.02 (56 bytes)
%Documents and Settings%\All Users\Application Data\ACLHCX\SOS.01 (80 bytes)
%Documents and Settings%\All Users\Application Data\ACLHCX\SOS.00 (2 bytes)
%Documents and Settings%\All Users\Application Data\ACLHCX\SOS.exe (15021 bytes)

Registry activity

The process SOS.exe:656 makes changes in a system registry.

The SpyTool creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "53 E6 CB D0 2C 89 9B AC 4C C3 40 BD 3F A0 DD 50"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Programs" = "%Documents and Settings%\All Users\Start Menu\Programs"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[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]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

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

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"SOS Start" = "%Documents and Settings%\All Users\Application Data\ACLHCX\SOS.exe"

The process 967b5f6cf732bf40409a01732ef74e5a.exe:1040 makes changes in a system registry.

The SpyTool creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "B1 51 86 1D 1C C4 64 3A C3 3A C0 DB 3C C4 8A 6F"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\All Users\Application Data\ACLHCX]
"SOS.exe" = "SOS"

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

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

The SpyTool modifies IE settings for security zones to map all urls to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName" = "1"

The SpyTool modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"UNCAsIntranet" = "1"

The SpyTool modifies IE settings for security zones to map all web-nodes that bypassing proxy to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass" = "1"

Network activity (URLs)

URL	IP
smtp.mail.yahoo.com	98.138.105.21

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):

   967b5f6cf732bf40409a01732ef74e5a.exe:1040

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

   %Documents and Settings%\All Users\Application Data\SUS\Screen_2013-08-24_16-54-34.jpg (707 bytes)
   %Documents and Settings%\All Users\Application Data\SUS\SOS.005 (1944 bytes)
   %Documents and Settings%\All Users\Application Data\SUS\2013-08-24_16-54-34.005 (157 bytes)
   %Documents and Settings%\All Users\Application Data\SUS\Screen_2013-08-24_16-54-34.html (791 bytes)
   %Documents and Settings%\All Users\Application Data\ACLHCX\SOS.02 (56 bytes)
   %Documents and Settings%\All Users\Application Data\ACLHCX\SOS.01 (80 bytes)
   %Documents and Settings%\All Users\Application Data\ACLHCX\SOS.00 (2 bytes)
   %Documents and Settings%\All Users\Application Data\ACLHCX\SOS.exe (15021 bytes)

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

   [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   "SOS Start" = "%Documents and Settings%\All Users\Application Data\ACLHCX\SOS.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