UDS:DangerousObject.Multi.Generic (Kaspersky), Trojan.Win32.Generic!BT (VIPRE), Win32.SuspectCrc!IK (Emsisoft), 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
MD5: 2c2aab3fc7c273a83df662f6fa3e336e
SHA1: a946bb875d7ff7510bb058e0dd172127d664b3ff
SHA256: 94ae810b7bf5c001267cc43fc4aa6606697760745836b68d73bafdc884e98900
SSDeep: 6144:PvL2bHfVOrudlvby2K13/WB5fFfr1WvwFLjVd eoOppSnHbTTnY/bkRkY:PybH9OMvbOvWPdT1WvwFLBdLoJn7Tjdv
Size: 375808 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2013-08-07 19:32:46
Analyzed on: WindowsXP SP3 32-bit
Summary: Worm. A program that is primarily replicating on networks or removable drives.
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):
%original file name%.exe:1856
reg.exe:1652
reg.exe:1284
reg.exe:592
reg.exe:184
reg.exe:580
The Worm injects its code into the following process(es):
cvtres.exe:372
File activity
The process %original file name%.exe:1856 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Application Data\hJQMZ3mL\local.exe.lnk (861 bytes)
%Documents and Settings%\%current user%\Application Data\hJQMZ3mL\5po8p0eUxzTbg9ch5r (48148 bytes)
The process cvtres.exe:372 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Application Data\csrv.exe (32 bytes)
%Documents and Settings%\%current user%\Application Data\TQA3VNORDO.exe (35 bytes)
Registry activity
The process %original file name%.exe:1856 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[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 Start Menu" = "%Documents and Settings%\All Users\Start Menu"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Personal" = "%Documents and Settings%\%current user%\My Documents"
[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\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"My Pictures" = "%Documents and Settings%\%current user%\My Documents\My Pictures"
[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"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Documents" = "%Documents and Settings%\All Users\Documents"
"CommonVideo" = "%Documents and Settings%\All Users\Documents\My Videos"
"CommonMusic" = "%Documents and Settings%\All Users\Documents\My Music"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Start Menu" = "%Documents and Settings%\%current user%\Start Menu"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"CommonPictures" = "%Documents and Settings%\All Users\Documents\My Pictures"
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "BA 61 44 64 92 5C 32 59 1F A3 C8 F0 18 72 CA 75"
[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"
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"
The Worm modifies IE settings for security zones to map all urls to the Intranet Zone:
"IntranetName" = "1"
The process reg.exe:1652 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "06 7A B6 B6 DD 02 E8 AD E8 16 2C 4E 89 C3 28 8D"
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"
The process reg.exe:1284 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C7 0F 2C EA DC AE AD 5D 56 15 11 F0 54 ED 73 0B"
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"
The process reg.exe:592 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "DC 84 78 83 7E 6E 74 2A 50 FB 94 D1 E7 D3 5E 51"
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]
"TQA3VNORDO.exe" = "%Documents and Settings%\%current user%\Application Data\TQA3VNORDO.exe:*:Enabled:Windows Messanger"
The process reg.exe:184 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E8 0C B2 01 7D E3 94 08 12 C8 56 1E 8C 3A 7E 47"
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]
"cvtres.exe" = "%WinDir%\Microsoft.NET\Framework\v2.0.50727\cvtres.exe:*:Enabled:Windows Messanger"
The process reg.exe:580 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1F 12 4B 98 B2 40 D3 04 75 96 39 77 24 04 BE 2B"
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]
"csrv.exe" = "%Documents and Settings%\%current user%\Application Data\hJQMZ3mL\local.exe.lnk"
The process cvtres.exe:372 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "87 7E 21 56 24 AD 18 59 A1 FF 17 F2 08 47 E9 34"
[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]
"IZ6MDTTHGR" = "Local"
[HKCU\Software\VB and VBA Program Settings\INSTALL\DATE]
"IZ6MDTTHGR" = "January 8, 2014"
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
- Click (here) to download and install Ad-Aware Free Antivirus.
- Update the definition files.
- Run a full scan of your computer.
Manual removal*
- Terminate malicious process(es) (How to End a Process With the Task Manager):
%original file name%.exe:1856
reg.exe:1652
reg.exe:1284
reg.exe:592
reg.exe:184
reg.exe:580 - Delete the original Worm file.
- Delete or disinfect the following files created/modified by the Worm:
%Documents and Settings%\%current user%\Application Data\hJQMZ3mL\local.exe.lnk (861 bytes)
%Documents and Settings%\%current user%\Application Data\hJQMZ3mL\5po8p0eUxzTbg9ch5r (48148 bytes)
%Documents and Settings%\%current user%\Application Data\csrv.exe (32 bytes)
%Documents and Settings%\%current user%\Application Data\TQA3VNORDO.exe (35 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"csrv.exe" = "%Documents and Settings%\%current user%\Application Data\hJQMZ3mL\local.exe.lnk" - Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
- Reboot the computer.