Gen:Variant.Koutodoor.6 (BitDefender), Trojan:Win32/Koutodoor.E (Microsoft), HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.Win32.Koutodoor.e (v) (VIPRE), Gen:Variant.Koutodoor.6 (B) (Emsisoft), Koutodoor.gen.g (McAfee), Trojan.Koutodoor (Symantec), Trojan.Win32.Koutodoor (Ikarus), Gen:Variant.Koutodoor.6 (FSecure), Rootkit-Pakes.AP (AVG), Win32:Caxnet [Trj] (Avast), BKDR_KTDOOR.SMIC (TrendMicro), Gen:Variant.Koutodoor.6 (AdAware)Behaviour: Trojan
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: af5bfd6aae2ee0dcfe7a87c0f550cc30
SHA1: 9cff3d784eb92da4ec9ffe1a4f4909ccf304a8be
SHA256: 9e387e6bfeddcec3b107687d7cc172797da24a7ff470e7a7d9ff9f7241228c9d
SSDeep: 1536:GJTmsIl0pJ5644XN76hc7VfYfmOoeBB6Q SPGaCwkL2TveqH5SOe:GJV7pJ56bmcZYfLoCWKCwkAH5SOe
Size: 89856 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: PackerUPXCompresorGratuitowwwupxsourceforgenet, UPolyXv05_v6
Company: no certificate found
Created at: 2010-09-06 09:54:11
Analyzed on: WindowsXP SP3 32-bit
Summary: Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).
Dynamic Analysis
Payload
No specific payload has been found.
Process activity
The Trojan creates the following process(es):
%original file name%.exe:2004
The Trojan injects its code into the following process(es):No processes have been created.
File activity
The process %original file name%.exe:2004 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%System%\drivers\dcdavvx.sys (40896 bytes)
%System%\zpu.dll (53248 bytes)
%System%\djpssp.bat (120 bytes)
Registry activity
The process %original file name%.exe:2004 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65324"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65324"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\DateTime]
"SID" = "S-1-5-21-606747145-1060284298-839522115-1004"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons\NewStartPanel]
"{871C5380-42A0-1069-A2EA-08002B30309D}" = "0"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65324"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 0C 00 00 00 01 00 00 00 00 00 00 00"
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "38 C3 2A F0 EA 50 99 68 2D 8C BA 83 5E 96 D8 07"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65324"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"MigrateProxy" = "1"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"
The Trojan 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 Trojan modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:
"ProxyBypass" = "1"
Proxy settings are disabled:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"
The Trojan modifies IE settings for security zones to map all urls to the Intranet Zone:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName" = "1"
The Trojan deletes the following value(s) in system registry:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"
Dropped PE files
There are no dropped PE files.
HOSTS file anomalies
No changes have been detected.
Rootkit activity
The Trojan's driver "%Drivers%\dcdavvx.sys" substitutes a pointer of ParseProcedure function for the object Device.
The Trojan's driver "%Drivers%\dcdavvx.sys" substitutes a pointer of ParseProcedure function for the object Key.
Using the driver "%System%\drivers\dcdavvx.sys" the Trojan controls creation and closing of processes by installing the process notifier.
Propagation
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*
- Scan a system with an anti-rootkit tool.
- Terminate malicious process(es) (How to End a Process With the Task Manager):
%original file name%.exe:2004
- Delete the original Trojan file.
- Delete or disinfect the following files created/modified by the Trojan:
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%System%\drivers\dcdavvx.sys (40896 bytes)
%System%\zpu.dll (53248 bytes)
%System%\djpssp.bat (120 bytes) - Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
- Reboot the computer.
Static Analysis
VersionInfo
Company Name:
Product Name:
Product Version: 1, 0, 0, 0
Legal Copyright: Copyright 2010
Legal Trademarks:
Original Filename:
Internal Name:
File Version: 1, 0, 0, 0
File Description:
Comments:
Language: English (United States)
Company Name: Product Name: Product Version: 1, 0, 0, 0Legal Copyright: Copyright 2010Legal Trademarks: Original Filename: Internal Name: File Version: 1, 0, 0, 0File Description: Comments: Language: English (United States)
PE Sections
Name | Virtual Address | Virtual Size | Raw Size | Entropy | Section MD5 |
---|---|---|---|---|---|
UPX0 | 4096 | 40960 | 0 | 0 | d41d8cd98f00b204e9800998ecf8427e |
UPX1 | 45056 | 86016 | 86016 | 5.37713 | ac06ab7384d890742201d14316140245 |
.rsrc | 131072 | 4096 | 2560 | 2.58534 | 591af8e314f28dbed7454d42db7c7712 |
Dropped from:
Downloaded by:
Similar by SSDeep:
Similar by Lavasoft Polymorphic Checker:
Network Activity
URLs
URL | IP |
---|---|
hxxp://www.ppzy.com/start.php?id=13 | 111.68.2.102 |
IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)
Traffic
GET /start.php?id=13 HTTP/1.1
Host: 111.68.2.102
Cache-Control: no-cache
HTTP/1.1 404 Not Found
Date: Sat, 08 Mar 2014 20:49:34 GMT
Server: Apache
Content-Length: 207
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html><head>.<title>404 Not Found</title>.</head><body>.<h1>Not Found</h1>.<p>The requested URL /start.php was not found on this server.</p>.</body></html>...