Worm.Win32.Ainslot.VB_9723121a60

by malwarelabrobot on January 11th, 2014 in Malware Descriptions.

Trojan.MSIL.Agent.dhua (Kaspersky), Trojan.Win32.Generic!BT (VIPRE), Worm.Win32.Ainslot.VB.FD, GenericAutorunWorm.YR, WormAinslot_VariantOfZeus.YR (Lavasoft MAS)
Behaviour: Trojan, Worm, WormAutorun


The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Summary
Technical Details
Removal Recommendations

MD5: 9723121a603936d285014c2e33c07032
SHA1: 352f02ea955a5642ae9db82da171b803b570b77a
SHA256: 514d3099388092625b464b23bd8d644454b8b5fedbcd6a420eac8eb34015ed9e
SSDeep: 24576:4kTjJJjNZ4jOZUhuyShvKOSh jlfoBZumgrBffsxX3JXXTisxH4:4yjXjzUXsySNVSh xfoB5CHg5XD
Size: 1323008 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2013-11-07 21:50:27
Analyzed on: WindowsXP SP3 32-bit


Summary:

Worm. A program that is primarily replicating on networks or removable drives.

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):

reg.exe:1568
reg.exe:2764
reg.exe:2744
reg.exe:1220
fixmapi.exe:2580
AppLaunch.exe:200
AppLaunch.exe:3788
AppLaunch.exe:3896
AppLaunch.exe:1932

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

fixmapi.exe:3752
AppLaunch.exe:2504
wdmaud.exe:852
%original file name%.exe:2680
Slideshow.exe:2452

File activity

The process AppLaunch.exe:2504 makes changes in the file system.
The Worm creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\TF54VP44GD.exe (59 bytes)
%Documents and Settings%\%current user%\Application Data\Logme (33 bytes)

The process wdmaud.exe:852 makes changes in the file system.
The Worm deletes the following file(s):

%Documents and Settings%\%current user%\My Documents\My Music\wdmaud.exe (0 bytes)

The process %original file name%.exe:2680 makes changes in the file system.
The Worm creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Desktop\Slideshow.exe (5442 bytes)
%Documents and Settings%\%current user%\My Documents\My Music\fixmapi.exe (15 bytes)
%Documents and Settings%\%current user%\My Documents\My Music\wdmaud.exe (8281 bytes)

The process Slideshow.exe:2452 makes changes in the file system.
The Worm creates and/or writes to the following file(s):

%System%\d3d9caps.tmp (2644 bytes)

The Worm deletes the following file(s):

%System%\d3d9caps.dat (0 bytes)

Registry activity

The process reg.exe:1568 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "4A AC F8 81 3B 6E AE D8 98 EE 5B 84 83 E7 8A 0F"

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]
"TF54VP44GD.exe" = "%Documents and Settings%\%current user%\Application Data\TF54VP44GD.exe:*:Enabled:Windows Messanger"

The process reg.exe:2764 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "58 17 FD 9D 38 2F 6E 08 7E E4 26 5E D0 60 14 C6"

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

The process reg.exe:2744 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "55 38 D4 64 F9 7A 74 A4 C3 72 EC 97 FE 17 FC CA"

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

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\%WinDir%\Microsoft.NET\Framework\v2.0.50727]
"AppLaunch.exe" = "%WinDir%\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe:*:Enabled:Windows Messanger"

The process reg.exe:1220 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "D7 15 CE 92 85 24 A2 D7 47 CF EA 9B F7 A9 98 FF"

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

The process fixmapi.exe:3752 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "D8 A8 97 05 57 54 F3 AE C9 23 9D F4 88 7E 17 10"

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

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

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\RunOnce]
"FIXMAPI 1.0 MAPI Repair Tool" = "%Documents and Settings%\%current user%\My Documents\My Music\fixmapi.exe"

The process fixmapi.exe:2580 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "42 CF 06 87 1F 50 D6 12 6C 1C CD DB 49 3C CD 10"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f3-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"AutoDetect" = "1"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"My Music" = "%Documents and Settings%\%current user%\My Documents\My Music"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{773a730e-74fb-11e2-b597-000c293bdf2f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f2-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f5-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

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

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\My Documents\My Music]
"wdmaud.exe" = "Slideshow"

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

The Worm 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"

The Worm 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:

"UNCAsIntranet" = "1"

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

"IntranetName" = "1"

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\RunOnce]
"FIXMAPI 1.0 MAPI Repair Tool" = "%Documents and Settings%\%current user%\My Documents\My Music\fixmapi.exe"

The process AppLaunch.exe:200 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "7E 4B FA 26 CE B8 D6 A1 0C 56 AA 63 5A 95 50 25"

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

The process AppLaunch.exe:3788 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "59 C3 15 6D F4 A6 0A A9 F4 A1 79 5B FF 7D CD F2"

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

The process AppLaunch.exe:2504 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "7B 03 EA 51 E0 44 A1 FB 8D C9 27 12 6C EF C1 57"

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

[HKCU\Software\VB and VBA Program Settings\SrvID\ID]
"1URHUAYIZG" = "Home"

[HKCU\Software\VB and VBA Program Settings\INSTALL\DATE]
"1URHUAYIZG" = "January 10, 2014"

The process AppLaunch.exe:3896 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "4F 59 01 86 24 D1 3D D5 22 40 0E 75 4E ED 68 57"

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

The process AppLaunch.exe:1932 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "3F CA CE 47 DD 4F 49 76 14 9F 06 E7 4A 94 A7 92"

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

The process wdmaud.exe:852 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "5E 51 23 4C 23 4B 3F 5F 6B BC 47 3B 23 C6 B6 41"

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

The process %original file name%.exe:2680 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A4 3E 8F 54 AA C5 4A C7 2F 9E 9E 1D 8F 3A F8 30"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f3-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

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

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{773a730e-74fb-11e2-b597-000c293bdf2f}]
"BaseClass" = "Drive"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f2-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f5-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

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

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

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\My Documents\My Music]
"fixmapi.exe" = "FIXMAPI 1.0 MAPI Repair Tool"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Desktop]
"Slideshow.exe" = "Slideshow"

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

"IntranetName" = "1"

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

"ProxyBypass" = "1"

The process Slideshow.exe:2452 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "9E ED F8 66 A6 24 C9 40 D9 74 A8 8C 5C 77 99 55"

[HKCU\Software\Microsoft\Direct3D\MostRecentApplication]
"Name" = "Slideshow.exe"

Network activity (URLs)

No activity has been detected.

HOSTS file anomalies

No changes have been detected.

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.


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):

    reg.exe:1568
    reg.exe:2764
    reg.exe:2744
    reg.exe:1220
    fixmapi.exe:2580
    AppLaunch.exe:200
    AppLaunch.exe:3788
    AppLaunch.exe:3896
    AppLaunch.exe:1932

  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\TF54VP44GD.exe (59 bytes)
    %Documents and Settings%\%current user%\Application Data\Logme (33 bytes)
    %Documents and Settings%\%current user%\Desktop\Slideshow.exe (5442 bytes)
    %Documents and Settings%\%current user%\My Documents\My Music\fixmapi.exe (15 bytes)
    %Documents and Settings%\%current user%\My Documents\My Music\wdmaud.exe (8281 bytes)
    %System%\d3d9caps.tmp (2644 bytes)

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

    [HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce]
    "FIXMAPI 1.0 MAPI Repair Tool" = "%Documents and Settings%\%current user%\My Documents\My Music\fixmapi.exe"

  5. Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
  6. Reboot the computer.

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