HackTool.Win32.PassView_3fa6f1da9d

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 HackTool's file once a user opens a drive's folder in Windows Explorer.

Process activity

The HackTool creates the following process(es):

bridgemigplugin.exe:2928
vbc.exe:2392
vbc.exe:2056

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

bridgemigplugin.exe:2164
%original file name%.exe:1060
%original file name%.exe:1092
FlashUtil__ActiveX.exe:404

File activity

The process bridgemigplugin.exe:2164 makes changes in the file system.

The HackTool deletes the following file(s):

%Documents and Settings%\%current user%\Application Data\Winamp\bridgemigplugin.exe (0 bytes)

The process %original file name%.exe:1060 makes changes in the file system.

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

%Documents and Settings%\%current user%\Application Data\pid.txt (4 bytes)
%System%\wbem\Logs\wbemprox.log (150 bytes)
%Documents and Settings%\%current user%\Application Data\pidloc.txt (39 bytes)

The HackTool deletes the following file(s):

%Documents and Settings%\%current user%\Cookies\Current_User@taobao[1].txt (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\holderwb.txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@eyereturn[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@cpro.baidustatic[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@127.0.0[1].txt (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\holdermail.txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@www.msn[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@cpro.baidu[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@twitter[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@microsoft[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@c.msn[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@c.bing[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@video.ca.msn[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@java[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@support[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@alimama[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@opera[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@google[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@c.ca.msn[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@chrome[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@atdmt[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@ssl.bing[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@mmstat[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@ok365[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@adnxs[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@hm.baidu[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@dasf[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@ox-d.adobe[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@ia.nspmotion[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@oracle.112.2o7[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@c.atdmt[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@doubleclick[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@tns-counter[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@bing[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@baidu[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@cfusion[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@support.google[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@faith-hill-shows-off-new-braces-at-grammys[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@adobe[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@msn[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\index.dat (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@www.ok365[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@www.bing[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@openx[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@scorecardresearch[2].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@www.javafaq[1].txt (0 bytes)
%Documents and Settings%\%current user%\Cookies\Current_User@yandex[1].txt (0 bytes)

The process %original file name%.exe:1092 makes changes in the file system.

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

%Documents and Settings%\%current user%\Application Data\Winamp\bridgemigplugin.exe (5873 bytes)
%Documents and Settings%\%current user%\Application Data\Winamp\FlashUtil__ActiveX.exe (15 bytes)

The process vbc.exe:2392 makes changes in the file system.

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

%Documents and Settings%\%current user%\Local Settings\Temp\holderwb.txt (2 bytes)

Registry activity

The process bridgemigplugin.exe:2164 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A9 97 72 01 17 EA 25 C0 E8 8B DD 5D 85 CC 20 26"

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

The process bridgemigplugin.exe:2928 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "6E D1 61 77 9C AD 87 86 12 18 7D 59 FE B1 D2 83"

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

The process %original file name%.exe:1060 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy\traceIdentifier]
"Guid" = "5f31090b-d990-4e91-b16d-46121d0255aa"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil\traceIdentifier]
"Guid" = "8aefce96-4618-42ff-a057-3536aa78233e"

[HKLM\System\CurrentControlSet\Services\Eventlog\Application\ESENT]
"EventMessageFile" = "%System%\ESENT.dll"

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

[HKLM\System\CurrentControlSet\Services\Eventlog\Application\ESENT]
"CategoryCount" = "16"

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

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy]
"Active" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"Active" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

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

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"ControlFlags" = "1"
"LogSessionName" = "stdout"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil]
"Active" = "1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
"Hidden" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy]
"LogSessionName" = "stdout"
"ControlFlags" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg\traceIdentifier]
"Guid" = "5f31090b-d990-4e91-b16d-46121d0255aa"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "16 AA 25 64 90 44 84 2E 6B B1 FD F6 1A C3 B5 6E"

[HKLM\System\CurrentControlSet\Services\Eventlog\Application\ESENT]
"CategoryMessageFile" = "%System%\ESENT.dll"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil]
"LogSessionName" = "stdout"

[HKLM\System\CurrentControlSet\Services\Eventlog\Application\ESENT]
"TypesSupported" = "7"

[HKLM\SOFTWARE\Microsoft\ESENT\Process\3fa6f1da9dc57902a82ccd391b50e619\DEBUG]
"Trace Level" = ""

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil]
"ControlFlags" = "1"

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

[HKLM\SOFTWARE\Microsoft\ESENT\Process\3fa6f1da9dc57902a82ccd391b50e619\DEBUG]
"Trace Level"

The process %original file name%.exe:1092 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "75 1A 1B C5 57 8B 5A AD 69 9E 31 24 77 7E C6 7A"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{5c14c4f6-74da-11e2-81b0-000c29ec7fc5}]
"BaseClass" = "Drive"

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

[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\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Application Data\Winamp]
"FlashUtil__ActiveX.exe" = ""

[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"

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

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

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

"IntranetName" = "1"

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

"ProxyBypass" = "1"

The process FlashUtil__ActiveX.exe:404 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "D9 AE 38 F0 B9 48 8D 9F CF E9 42 2D 28 AF 26 0A"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{5c14c4f6-74da-11e2-81b0-000c29ec7fc5}]
"BaseClass" = "Drive"

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

[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"

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

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

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Application Data\Winamp]
"bridgemigplugin.exe" = " Offline Files Migration Plugin"

[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 Desktop" = "%Documents and Settings%\All Users\Desktop"

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

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

"ProxyBypass" = "1"

The HackTool 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 HackTool adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce]
"Microsoft .NET Framework v1.0 compatibility" = "%Documents and Settings%\%current user%\Application Data\Winamp\FlashUtil__ActiveX.exe"

The process vbc.exe:2392 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C8 73 DE 2D 85 80 EA E0 0A 04 D7 AC 27 92 0B 6F"

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

The process vbc.exe:2056 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "91 AF CB F5 3B 4B B1 54 62 B3 44 25 94 CB 1B 14"

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

Network activity (URLs)

URL	IP
hxxp://whatismyipaddress.com/	67.203.139.148
smtp.163.com	220.181.12.11

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 HackTool'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):

   bridgemigplugin.exe:2928
   vbc.exe:2392
   vbc.exe:2056

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

   %Documents and Settings%\%current user%\Application Data\pid.txt (4 bytes)
   %System%\wbem\Logs\wbemprox.log (150 bytes)
   %Documents and Settings%\%current user%\Application Data\pidloc.txt (39 bytes)
   %Documents and Settings%\%current user%\Application Data\Winamp\bridgemigplugin.exe (5873 bytes)
   %Documents and Settings%\%current user%\Application Data\Winamp\FlashUtil__ActiveX.exe (15 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\holderwb.txt (2 bytes)

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

   [HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce]
   "Microsoft .NET Framework v1.0 compatibility" = "%Documents and Settings%\%current user%\Application Data\Winamp\FlashUtil__ActiveX.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