VirTool:MSIL/Injector.AQ (Microsoft), HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.PWS.Spy.11887 (DrWeb), Win32.SuspectCrc (Ikarus), Gen:Variant.Kazy.246811 (FSecure), MSIL:Crypt-RV [Trj] (Avast), Backdoor.Win32.Xtrat.FD, GenericAutorunWorm.YR, GenericInjector.YR (Lavasoft MAS)Behaviour: Trojan, Backdoor, Worm, VirTool, WormAutorun
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: 8555d1f6e578c7bcd92133dc5f1d90d9
SHA1: e006fb5317ea7710935b07dfc75bfb4634e80f0d
SHA256: 4f9f0b7a9edf7816affbac9e27f4f33b8991648ed2a16ee03493bc467c49323a
SSDeep: 3072:DxLUc3Ac9UwOuZRB wbxzYmP3oPPC x1e5VfxkTykYUQfP44SdE6:Vwc3A00u8M3oy 3e5xxU9NLd
Size: 150016 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2014-02-15 22:31:06
Analyzed on: WindowsXP SP3 32-bit
Summary: Backdoor. Malware that enables a remote control of victim's machine.
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 Backdoor's file once a user opens a drive's folder in Windows Explorer. |
Process activity
The Backdoor creates the following process(es):
%original file name%.exe:2636
226.exe:2088
The Backdoor injects its code into the following process(es):No processes have been created.
File activity
The process %original file name%.exe:2636 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\226.exe (101 bytes)
The process 226.exe:2088 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):
%WinDir%\InstallDir\Server.exe (601 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\5AfTalb.dat (314 bytes)
The Backdoor deletes the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\x.html (0 bytes)
Registry activity
The process %original file name%.exe:2636 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "24 6E 04 21 46 B7 21 80 02 06 24 09 6C F8 71 15"
The process 226.exe:2088 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "31 47 A4 E3 58 E2 26 18 36 0E 91 C2 0D 53 04 BB"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f3-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"AutoDetect" = "1"
[HKLM\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication]
"ID" = "708992537"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{773a730e-74fb-11e2-b597-000c293bdf2f}]
"BaseClass" = "Drive"
[HKLM\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication]
"Name" = "226.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f2-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f5-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "46 00 00 00 40 00 00 00 01 00 00 00 00 00 00 00"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
[HKCU\Software\XtremeRAT]
"Mutex" = "5AfTalb"
[HKCU\Software\5AfTalb]
"ServerStarted" = "19/02/2014 02:05:23"
The Backdoor 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 Backdoor modifies IE settings for security zones to map all web-nodes that bypassing proxy to the Intranet Zone:
"ProxyBypass" = "1"
The Backdoor modifies IE settings for security zones to map all urls to the Intranet Zone:
"IntranetName" = "1"
Proxy settings are disabled:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"
The Backdoor deletes the following value(s) in system registry:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"
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 Backdoor'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:2636
226.exe:2088 - Delete the original Backdoor file.
- Delete or disinfect the following files created/modified by the Backdoor:
%Documents and Settings%\%current user%\Local Settings\Temp\226.exe (101 bytes)
%WinDir%\InstallDir\Server.exe (601 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\5AfTalb.dat (314 bytes) - Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.