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Worm.Win32.Ainslot.VB_45f2f4c4be


UDS:DangerousObject.Multi.Generic (Kaspersky), Worm.Win32.Ainslot!IK (Emsisoft), Trojan.Win32.Delphi.FD, Trojan.Win32.Sasfis.FD, VirTool.Win32.DelfInject.FD, Worm.Win32.Ainslot.VB.FD, WormAinslot_VariantOfZeus.YR, GenericAutorunWorm.YR, GenericInjector.YR (Lavasoft MAS)Behaviour: Trojan, Worm, VirTool, WormAutorun

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

Summary

MD5: 45f2f4c4be8931861c07bea4d660c65d

SHA1: 5350891b2e3380c14ca9f4f988082bbb321ff29d

SHA256: 79453e53a298d8301ccbedbe8459fe8c5727d5de8f9a1d09dde9f37be90cf42e

SSDeep: 24576:nyycxd5m3Fv0/2Z ohhhs6G C7 4ws2OrF4LM:nZsm3Sa 0hhs5N7XlRF

Size: 947727 bytes

File type: EXE

Platform: WIN32

Entropy: Packed

PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6

Company: StarApp

Created at: 2013-04-16 10:33:27

Analyzed on: WindowsXP SP3 32-bit

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

Dynamic Analysis

Payload

Behaviour Description
WormAutorunA 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:1068
reg.exe:1760
reg.exe:1564
reg.exe:872
winhost.exe:648
winhost.exe:1140
winhost.exe:1124
winhost.exe:456
iexplore.exe:1532
iexplore.exe:2040
iexplore.exe:1080
iexplore.exe:452
iexplore.exe:1628
iexplore.exe:1500
iexplore.exe:1520
iexplore.exe:1468
iexplore.exe:1452
iexplore.exe:1484
iexplore.exe:1744
iexplore.exe:648
iexplore.exe:1676
iexplore.exe:1664
iexplore.exe:528
iexplore.exe:248
iexplore.exe:1512
%original file name%.exe:216
%original file name%.exe:1976

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

560webhost.exe:356
iexplore.exe:900
847bspers.exe:280

File activity

The process winhost.exe:648 makes changes in the file system.


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

%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Bs3kVDkr1FPY\Bs3kVDkr1FPY.nfo (3 bytes)

The Worm deletes the following file(s):

%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Bs3kVDkr1FPY\Bs3kVDkr1FPY.nfo (0 bytes)

The process winhost.exe:1124 makes changes in the file system.


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

%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Bs3kVDkr1FPY\Bs3kVDkr1FPY.nfo (3 bytes)

The Worm deletes the following file(s):

%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Bs3kVDkr1FPY\Bs3kVDkr1FPY.svr (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\x.html (0 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Bs3kVDkr1FPY\Bs3kVDkr1FPY.nfo (0 bytes)

The process 847bspers.exe:280 makes changes in the file system.


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

%Documents and Settings%\%current user%\Application Data\bspers.exe (161 bytes)
%Documents and Settings%\%current user%\Application Data\noinstall (34 bytes)

The process %original file name%.exe:1976 makes changes in the file system.


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

%System%\560webhost.exe (157 bytes)
%System%\560webhost.exe.exe (4 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\winhost.exe (7345 bytes)
%System%\847bspers.exe (181 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Bs3kVDkr1FPY\Bs3kVDkr1FPY.dat (298 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Bs3kVDkr1FPY\Bs3kVDkr1FPY.nfo (3 bytes)
%System%\847bspers.exe.exe (4 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Bs3kVDkr1FPY\Bs3kVDkr1FPY.svr (1651 bytes)

The Worm deletes the following file(s):

%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Bs3kVDkr1FPY\Bs3kVDkr1FPY.svr (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\x.html (0 bytes)

Registry activity

The process reg.exe:1068 makes changes in the system registry.


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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F0 73 06 25 68 23 F8 DB 9E F5 9F 72 EC 6D 09 5B"

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

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


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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "B1 16 FA 95 8E E9 2D 97 84 5F 8D FB 92 93 FB 04"

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

The process reg.exe:1564 makes changes in the system registry.


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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "FE 7F C6 42 58 AC EF 77 31 91 7F 4D 83 CE 26 74"

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

The process reg.exe:872 makes changes in the system registry.


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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A7 F3 C7 EF 82 8C E6 B7 20 6B CB C5 CB B1 B7 E2"

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

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\%System%]
"847bspers.exe" = "%System%\847bspers.exe:*:Enabled:Windows Messanger"

The process 560webhost.exe:356 makes changes in the system registry.


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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C1 A5 D1 C3 B4 3E 60 F2 F4 01 7E 84 EF D4 14 41"

The process winhost.exe:648 makes changes in the system registry.


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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "7D 09 3F 35 AF 25 A2 F8 6D 26 EE 3E C7 D6 E1 17"

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"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\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

The process winhost.exe:1140 makes changes in the system registry.


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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E6 EB 05 2B F0 1C 92 31 41 16 4F A6 44 44 E0 EE"

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

The process winhost.exe:1124 makes changes in the system registry.


The Worm 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\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

[HKCU\Software\Bs3kVDkr1FPY]
"ServerStarted" = "12/13/2013 6:41:14 AM"

[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{41K2X672-0Y1F-0AXL-4TT0-2CLY2H32D027}]
"StubPath" = "%Documents and Settings%\%current user%\Application Data\Microsoft\winhost.exe restart"

[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"

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

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

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

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

[HKCU\Software\1124]
"Mutex" = "Bs3kVDkr1FPY"

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

[HKCU\Software\Bs3kVDkr1FPY]
"InstalledServer" = "%Documents and Settings%\%current user%\Application Data\Microsoft\winhost.exe"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "80 2F 2E CF 4D CD 4C 9D 3B 70 BA 67 88 C7 0B 1E"

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

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

[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"

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

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

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

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

The process winhost.exe:456 makes changes in the system registry.


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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "92 48 89 32 C0 F4 27 88 13 F7 38 32 D3 21 51 25"

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

The process iexplore.exe:900 makes changes in the system registry.


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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "5C 66 10 E6 92 01 10 DC DD C0 25 81 04 F5 7F 14"

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"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\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{41K2X672-0Y1F-0AXL-4TT0-2CLY2H32D027}]
"StubPath" = "%Documents and Settings%\%current user%\Application Data\Microsoft\winhost.exe restart"

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]
"HKCU" = "%Documents and Settings%\%current user%\Application Data\Microsoft\winhost.exe"

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

The Worm deletes the following registry key(s):

[HKCU\Software\1124]

The process 847bspers.exe:280 makes changes in the system registry.


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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "BB 9B 32 87 9F E1 C5 9A 10 8C 8D 9C A3 3F C6 BC"

[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{BD1DBCAB-4EFF-A63E-DFDE-BDBD2FDDBAAF}]
"StubPath" = "%Documents and Settings%\%current user%\Application Data\bspers.exe"

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

[HKCU\Software\VB and VBA Program Settings\INSTALL\DATE]
"Z8WZMQENKH" = "December 13, 2013"

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

[HKCU\Software\Microsoft\Active Setup\Installed Components\{BD1DBCAB-4EFF-A63E-DFDE-BDBD2FDDBAAF}]
"StubPath" = "%Documents and Settings%\%current user%\Application Data\bspers.exe"

[HKCU\Software\VB and VBA Program Settings\SrvID\ID]
"Z8WZMQENKH" = "bspers"

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

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

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

The process %original file name%.exe:216 makes changes in the system registry.


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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "8A C6 4A 76 2F C4 5E 0D 2B 28 25 84 35 A5 C3 7A"

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

The process %original file name%.exe:1976 makes changes in the system registry.


The Worm 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"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Application Data\Microsoft]
"winhost.exe" = "LibreOffice Calc"

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

[HKCU\Software\Bs3kVDkr1FPY]
"ServerStarted" = "12/13/2013 6:41:01 AM"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%System%]
"560webhost.exe" = "560webhost"

[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{41K2X672-0Y1F-0AXL-4TT0-2CLY2H32D027}]
"StubPath" = "%Documents and Settings%\%current user%\Application Data\Microsoft\winhost.exe restart"

[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"

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

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

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

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

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

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

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%System%]
"847bspers.exe" = "847bspers"

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

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

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

[HKCU\Software\Bs3kVDkr1FPY]
"InstalledServer" = "%Documents and Settings%\%current user%\Application Data\Microsoft\winhost.exe"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "3F 40 B6 42 AC 8B 0E 2A 74 76 AD D7 34 75 97 D9"

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

[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"

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

[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"

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

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 web-nodes that bypassing proxy to the Intranet Zone:

"ProxyBypass" = "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:

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"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\Run]
"HKCU" = "%Documents and Settings%\%current user%\Application Data\Microsoft\winhost.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.

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):

    reg.exe:1068
    reg.exe:1760
    reg.exe:1564
    reg.exe:872
    winhost.exe:648
    winhost.exe:1140
    winhost.exe:1124
    winhost.exe:456
    iexplore.exe:1532
    iexplore.exe:2040
    iexplore.exe:1080
    iexplore.exe:452
    iexplore.exe:1628
    iexplore.exe:1500
    iexplore.exe:1520
    iexplore.exe:1468
    iexplore.exe:1452
    iexplore.exe:1484
    iexplore.exe:1744
    iexplore.exe:648
    iexplore.exe:1676
    iexplore.exe:1664
    iexplore.exe:528
    iexplore.exe:248
    iexplore.exe:1512
    %original file name%.exe:216
    %original file name%.exe:1976

  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\Microsoft\Windows\Bs3kVDkr1FPY\Bs3kVDkr1FPY.nfo (3 bytes)
    %Documents and Settings%\%current user%\Application Data\bspers.exe (161 bytes)
    %Documents and Settings%\%current user%\Application Data\noinstall (34 bytes)
    %System%\560webhost.exe (157 bytes)
    %System%\560webhost.exe.exe (4 bytes)
    %Documents and Settings%\%current user%\Application Data\Microsoft\winhost.exe (7345 bytes)
    %System%\847bspers.exe (181 bytes)
    %Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Bs3kVDkr1FPY\Bs3kVDkr1FPY.dat (298 bytes)
    %System%\847bspers.exe.exe (4 bytes)
    %Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Bs3kVDkr1FPY\Bs3kVDkr1FPY.svr (1651 bytes)

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

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

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

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

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

Static Analysis

Network Activity

Map

Strings from Dumps