Trojan-Dropper.MSIL.Agent.vfw (Kaspersky), Win32.SuspectCrc!IK (Emsisoft), Worm.Win32.Ainslot.VB.FD, GenericAutorunWorm.YR, WormAinslot_VariantOfZeus.YR (Lavasoft MAS)Behaviour: Trojan-Dropper, Trojan, Worm, WormAutorun
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: a4545fda14181a25f0467a0ef3edda61
SHA1: cea5525d2b545778763a500d337a3dc9af1f28ee
SHA256: 2c25e8ccbcdc806752eff103bcfed34d4578b03a02f3b3ee34d22a223e0bf704
SSDeep: 12288:aBBFGW9LetSg8r5IkssHcUepjv9QFjjMw3E3k4MlRVZQrKlPWaUAjSAPVY3Goe:PRkbrSgBepjvOAhk48RVZMKlUGPVf
Size: 755712 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2011-07-23 18:25:40
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:1420
reg.exe:436
reg.exe:1580
reg.exe:448
reg.exe:516
The Worm injects its code into the following process(es):
%original file name%.exe:184
File activity
The process %original file name%.exe:1420 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Application Data\uFAw2LfDcMUp.exe (5441 bytes)
The process %original file name%.exe:184 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Application Data\WinLogon.exe (1913 bytes)
%Documents and Settings%\%current user%\Application Data\data.dat (34 bytes)
Registry activity
The process %original file name%.exe:1420 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "64 31 46 73 34 6D F9 65 56 42 B3 0E 08 17 7A BB"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
"Hidden" = "2"
[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"
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]
"Graphic Driver" = "%Documents and Settings%\%current user%\Application Data\uFAw2LfDcMUp.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Audio Device" = "%Documents and Settings%\%current user%\Application Data\uFAw2LfDcMUp.exe"
The process %original file name%.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" = "B3 9F B2 4B 48 47 99 33 F6 DF 25 70 C1 C8 99 A8"
[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]
"NE7QGLU2WN" = "23.07"
[HKCU\Software\VB and VBA Program Settings\INSTALL\DATE]
"NE7QGLU2WN" = "December 15, 2013"
The process reg.exe:436 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "81 92 E4 8A E0 90 42 6B CD 7E 50 C6 91 BA E4 E2"
Adds a rule to the firewall Windows which allows any network activity:
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\c:]
"%original file name%.exe" = "c:\%original file name%.exe:*:Enabled:Windows Messanger"
The process reg.exe:1580 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "2A 38 A9 36 32 9D 19 F4 04 AA E8 6C FB F1 C1 D7"
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]
"WinLogon.exe" = "%Documents and Settings%\%current user%\Application Data\WinLogon.exe:*:Enabled:Windows Messanger"
The process reg.exe:448 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "72 75 81 D1 E7 D7 3E 3A B2 21 72 21 D2 AF 61 A3"
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"
The process reg.exe:516 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C6 52 70 E6 03 08 2D 3E 4B 0C 8A C2 9A 7F 38 A9"
[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile]
"DoNotAllowExceptions" = "0"
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:1420
reg.exe:436
reg.exe:1580
reg.exe:448
reg.exe:516 - Delete the original Worm file.
- Delete or disinfect the following files created/modified by the Worm:
%Documents and Settings%\%current user%\Application Data\uFAw2LfDcMUp.exe (5441 bytes)
%Documents and Settings%\%current user%\Application Data\WinLogon.exe (1913 bytes)
%Documents and Settings%\%current user%\Application Data\data.dat (34 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Graphic Driver" = "%Documents and Settings%\%current user%\Application Data\uFAw2LfDcMUp.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Audio Device" = "%Documents and Settings%\%current user%\Application Data\uFAw2LfDcMUp.exe" - Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
- Reboot the computer.