Trojan.Win32.Alureon_e1eb863d68

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:1700
%original file name%.exe:392
msiexec.exe:216

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

%original file name%.exe:596

File activity

The process %original file name%.exe:596 makes changes in the file system.

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

%Program Files%\LP\D1F5\C29.exe (170162 bytes)
%Documents and Settings%\%current user%\Application Data\507CF\F2C6.07C (3946 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%System%\config\software (963 bytes)
%System%\config\SOFTWARE.LOG (2467 bytes)

Registry activity

The process %original file name%.exe:1700 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C9 9D D1 F5 95 85 A4 50 41 4A 3F 16 D0 EC 47 97"

The process %original file name%.exe:392 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C0 18 DD 22 B0 88 7D 0B E2 FA 6B 27 68 B9 21 68"

The process %original file name%.exe:596 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65452"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 16 00 00 00 03 00 00 00 14 00 00 00"

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

"Cookies" = "%Documents and Settings%\%current user%\Cookies"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"

[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]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

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

[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "1"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyServer" = "http=127.0.0.1:64202"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "31 C7 1A 93 45 E9 AB CC 73 FE DC 5B 88 3D C3 9E"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65452"

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"DefaultConnectionSettings" = "3C 00 00 00 03 00 00 00 03 00 00 00 14 00 00 00"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"C29.exe" = "%Program Files%\LP\D1F5\C29.exe"

Automatic startup of the following service is disabled:

[HKLM\System\CurrentControlSet\Services\wscsvc]
"Start" = "3"

The Trojan deletes the following value(s) in system registry:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyOverride"

The process msiexec.exe:216 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "7A 39 04 65 3F 45 67 A5 A7 74 62 9A DC 4E 51 18"

Network activity (URLs)

URL	IP
hxxp://e6845.ce.akamaiedge.net/pca3-g2.crl
hxxp://e6845.ce.akamaiedge.net/CSC3-2009.crl
hxxp://tri-countymech.com/g/logo.png?pr=gJ4WK/SUh/TNhRMw9YLJ+MSTUivqg4b0xZNbK+/bxWq1SfkIYQAE	184.168.221.25
hxxp://seeworldonlines.com/logo.png?tq=gL5HtzoYwLzEpUb5fU3HxcW3API6EsazybMRtyFZ0umG8Ar0SsSA/gSoSEU=&pr=41	69.43.161.170
hxxp://e6845.ce.akamaiedge.net/pca3.crl
hxxp://e6845.ce.akamaiedge.net/CSC3-2009-2.crl
hxxp://a26.d.akamai.net/msdownload/update/v3/static/trustedr/en/authrootseq.txt
hxxp://a26.d.akamai.net/msdownload/update/v3/static/trustedr/en/authrootstl.cab
csc3-2009-2-crl.verisign.com	23.61.69.163
crl.verisign.com	23.61.181.163
www.download.windowsupdate.com	165.254.155.26
csc3-2009-crl.verisign.com	23.61.69.163

HOSTS file anomalies

No changes have been detected.

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):

   %original file name%.exe:1700
   %original file name%.exe:392
   

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

   %Program Files%\LP\D1F5\C29.exe (170162 bytes)
   %Documents and Settings%\%current user%\Application Data\507CF\F2C6.07C (3946 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
   %System%\config\software (963 bytes)
   %System%\config\SOFTWARE.LOG (2467 bytes)

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

   [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   "C29.exe" = "%Program Files%\LP\D1F5\C29.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