HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.Win32.Generic!BT (VIPRE), Virus.ILCrypt!IK (Emsisoft), Worm.Win32.Ainslot.VB.FD, GenericAutorunWorm.YR, WormAinslot_VariantOfZeus.YR (Lavasoft MAS)Behaviour: Trojan, Worm, Virus, WormAutorun
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: 198bbd4ca9ec429ca0e8097120d85180
SHA1: 97d9c4a6a5f9137ab1e09ea390cfc9f1a784bcd0
SHA256: f1aa764e9c144d160a7c9a76f0f52ca78ef1ca176e24733f6276d6b4efce4fd9
SSDeep: 12288:IuKdfNxFV/VgM0EodfcsgagqfLzWFkYykPpqOdRZceSUGIP:yfNxemiffg9qzS2Ylo0ZcyP
Size: 651312 bytes
File type: PE32
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: StarApp
Created at: 2011-07-02 01:53:51
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):
198bbd4ca9ec429ca0e8097120d85180.exe:1340
reg.exe:524
reg.exe:1260
reg.exe:1748
reg.exe:1504
The Worm injects its code into the following process(es):
vbc.exe:1796
File activity
The process 198bbd4ca9ec429ca0e8097120d85180.exe:1340 makes changes in a file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\vbc.exe (7547 bytes)
The process vbc.exe:1796 makes changes in a file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\Va.exe (3922 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Rs (33 bytes)
Registry activity
The process 198bbd4ca9ec429ca0e8097120d85180.exe:1340 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 42 F4 64 54 E3 BF CD 06 90 D6 D0 71 34 DE B5"
[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 reg.exe:524 makes changes in a system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "99 E4 B1 00 96 CC BF 9D D2 35 6D 6F BC 4B C1 28"
Adds a rule to the firewall Windows which allows any network activity:
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\c:]
"198bbd4ca9ec429ca0e8097120d85180.exe" = "c:\198bbd4ca9ec429ca0e8097120d85180.exe:*:Enabled:Windows Messanger"
The process reg.exe:1260 makes changes in a system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A1 AC D3 A6 65 F7 4F 3C 17 5E 4F 37 FD 41 4C E7"
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"
The process reg.exe:1748 makes changes in a system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1D 32 A2 4A 61 B0 06 57 C4 89 DC 1C D0 60 30 7E"
Adds a rule to the firewall Windows which allows any network activity:
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp]
"Va.exe" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\Va.exe:*:Enabled:Windows Messanger"
The process reg.exe:1504 makes changes in a system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F5 AD 54 AE 13 E1 58 B3 D0 EE 46 B8 37 C4 EC 95"
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"
The process vbc.exe:1796 makes changes in a system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "86 91 BE C0 CB FC 28 73 D9 11 87 D9 78 7D 75 73"
[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{F9EFAFEA-AC8A-F1AB-2CBD-CBFEA4CCEC1A}]
"StubPath" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\Va.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run]
"Windows Defender" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\Va.exe"
[HKCU\Software\Microsoft\Active Setup\Installed Components\{F9EFAFEA-AC8A-F1AB-2CBD-CBFEA4CCEC1A}]
"StubPath" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\Va.exe"
[HKCU\Software\VB and VBA Program Settings\SrvID\ID]
"W8Y9GFU73N" = "7/1/2001"
[HKCU\Software\VB and VBA Program Settings\INSTALL\DATE]
"W8Y9GFU73N" = "August 12, 2013"
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" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\Va.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Windows Defender" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\Va.exe"
Network activity (URLs)
No activity has 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):
198bbd4ca9ec429ca0e8097120d85180.exe:1340
reg.exe:524
reg.exe:1260
reg.exe:1748
reg.exe:1504 - Delete the original Worm file.
- Delete or disinfect the following files created/modified by the Worm:
%Documents and Settings%\%current user%\Local Settings\Temp\vbc.exe (7547 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Va.exe (3922 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Rs (33 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Windows Defender" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\Va.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Windows Defender" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\Va.exe" - Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
- Reboot the computer.