Worm.Win32.Ainslot.VB_776638ac17

Dynamic Analysis

Payload

Behaviour	Description
WormAutorun	A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Worm's file once a user opens a drive's folder in Windows Explorer.

Process activity

The Worm creates the following process(es):

776638ac17d103657896973e5880d800.exe:1588
reg.exe:540
reg.exe:340
reg.exe:1760
reg.exe:896

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

776638ac17d103657896973e5880d800.exe:592

File activity

The process 776638ac17d103657896973e5880d800.exe:592 makes changes in a file system.

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

%Documents and Settings%\%current user%\Application Data\logs (34 bytes)
%Documents and Settings%\%current user%\Application Data\L5EDMC4O56.exe (305 bytes)

Registry activity

The process 776638ac17d103657896973e5880d800.exe:1588 makes changes in a system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "0D 3E 56 E6 44 9D A3 4B D6 61 47 C3 8B E1 D8 20"

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

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

The process 776638ac17d103657896973e5880d800.exe:592 makes changes in a system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "2D 5B DD 67 64 78 F6 4F 1F E0 C6 8D 94 24 C0 05"

[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{CFBD7D75-AEAB-F53E-4DF6-C7A728DDEB0F}]
"StubPath" = "%Documents and Settings%\%current user%\Application Data\L5EDMC4O56.exe"

[HKCU\Software\Microsoft\Active Setup\Installed Components\{CFBD7D75-AEAB-F53E-4DF6-C7A728DDEB0F}]
"StubPath" = "%Documents and Settings%\%current user%\Application Data\L5EDMC4O56.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run]
"Windows Defender" = "%Documents and Settings%\%current user%\Application Data\L5EDMC4O56.exe"

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

[HKCU\Software\VB and VBA Program Settings\INSTALL\DATE]
"RK37QA92BA" = "September 16, 2013"

[HKCU\Software\VB and VBA Program Settings\SrvID\ID]
"RK37QA92BA" = "fulnp's Bot"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Windows Defender" = "%Documents and Settings%\%current user%\Application Data\L5EDMC4O56.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Windows Defender" = "%Documents and Settings%\%current user%\Application Data\L5EDMC4O56.exe"

The process reg.exe:540 makes changes in a system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "64 6A BC 5A 41 20 62 8E 5D 13 5C 71 01 79 F3 41"

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

The process reg.exe:340 makes changes in a system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "BD 6C 26 FC 74 C8 08 0C 8E DC 73 55 8F 88 6A DD"

Adds a rule to the firewall Windows which allows any network activity:

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\%Documents and Settings%\%current user%\Application Data]
"L5EDMC4O56.exe" = "%Documents and Settings%\%current user%\Application Data\L5EDMC4O56.exe:*:Enabled:Windows Messanger"

The process reg.exe:1760 makes changes in a system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1A BC 8F 06 B1 5F 80 CE 6B 09 80 A0 AB FF 34 FC"

Adds a rule to the firewall Windows which allows any network activity:

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\c:\]
"776638ac17d103657896973e5880d800.exe" = "c:\\776638ac17d103657896973e5880d800.exe:*:Enabled:Windows Messanger"

The process reg.exe:896 makes changes in a system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "68 79 0C 0F A8 24 EE 6E 1A 5F 31 00 6D 29 1E B4"

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

Network activity (URLs)

URL	IP
hxxp://api.ipinfodb.com/v2/ip_query_country.php?key=33134207068e7a95c2b45275a388806be6b9ca837fe782832723b99fb21a7a8c&timezone=off	67.212.77.12
dbag40.no-ip.biz	72.199.120.150

Rootkit activity

No anomalies have been detected.

Propagation

A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Worm's file once a user opens a drive's folder in Windows Explorer.

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):

   776638ac17d103657896973e5880d800.exe:1588
   reg.exe:540
   reg.exe:340
   reg.exe:1760
   reg.exe:896

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

   %Documents and Settings%\%current user%\Application Data\logs (34 bytes)
   %Documents and Settings%\%current user%\Application Data\L5EDMC4O56.exe (305 bytes)

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

   [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   "Windows Defender" = "%Documents and Settings%\%current user%\Application Data\L5EDMC4O56.exe"
   
   [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   "Windows Defender" = "%Documents and Settings%\%current user%\Application Data\L5EDMC4O56.exe"

5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
   
6. Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
   
7. 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