Trojan-Dropper.Win32.Vtimrun_757e30f760

by malwarelabrobot on February 12th, 2015 in Malware Descriptions.

Trojan.Win32.Chifrax.d (Kaspersky), TrojanDropperVtimrun.YR (Lavasoft MAS)
Behaviour: Trojan-Dropper, Trojan


The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

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Summary
Dynamic Analysis
Static Analysis
Network Activity
Map
Strings from Dumps
Removals

MD5: 757e30f76018132b96ba1c2068d8c81e
SHA1: b6a6408e040cfc1eb7b47b73064fc58e037538aa
SHA256: e27d0fd2bc7880f1eb87ded32bf3c138b862b197d991a61395c441f35af6d29f
SSDeep: 3072:rnj9utfUhINndIc0JOWgOiwFgkODT0jB1FFuC/DkOukB:rjDeiuWvGJcTTQOuG
Size: 104104 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2004-08-04 09:01:37
Analyzed on: WindowsXP SP3 32-bit


Summary:

Trojan-Dropper. Trojan program, intended for stealth installation of other malware into user's system.

Payload

No specific payload has been found.

Process activity

The Trojan-Dropper creates the following process(es):

eee.exe:660
%original file name%.exe:944

The Trojan-Dropper injects its code into the following process(es):

lspsurf.exe:200

Mutexes

The following mutexes were created/opened:
No objects were found.

File activity

The process lspsurf.exe:200 makes changes in the file system.
The Trojan-Dropper creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\Content\A8FABA189DB7D25FBA7CAC806625FD30 (96 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\Content\60E31627FDA0A46932B0E5948949F2A5 (933 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\MetaData\60E31627FDA0A46932B0E5948949F2A5 (164 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\MetaData\A8FABA189DB7D25FBA7CAC806625FD30 (224 bytes)

The process eee.exe:660 makes changes in the file system.
The Trojan-Dropper creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\test.htm (6 bytes)

The Trojan-Dropper deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\test.htm (0 bytes)

The process %original file name%.exe:944 makes changes in the file system.
The Trojan-Dropper creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\eee.exe (1568 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\lspsurf.exe (2892 bytes)

Registry activity

The process lspsurf.exe:200 makes changes in the system registry.
The Trojan-Dropper creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "FB C7 49 D8 BA F5 40 30 71 E2 D5 E6 CA 68 50 62"

[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"

The process eee.exe:660 makes changes in the system registry.
The Trojan-Dropper creates and/or sets the following values in system registry:

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp]
"setup.exe" = "setup"

[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" = "65452"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 1A 00 00 00 01 00 00 00 00 00 00 00"

[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 Documents" = "%Documents and Settings%\All Users\Documents"

[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\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"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[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"

"Desktop" = "%Documents and Settings%\%current user%\Desktop"

[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" = "65452"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E0 E2 95 56 1A 8D E1 32 E2 27 93 63 A2 5D AF 2E"

[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" = "65452"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"MigrateProxy" = "1"

[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"

[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"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

The Trojan-Dropper 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-Dropper 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-Dropper 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-Dropper deletes the following value(s) in system registry:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"

The process %original file name%.exe:944 makes changes in the system registry.
The Trojan-Dropper creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E2 3B 76 9F 80 BF 76 3F 5E D5 61 CB F3 76 B2 71"

To automatically run itself each time Windows is booted, the Trojan-Dropper adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce]
"wextract_cleanup0" = "rundll32.exe %System%\advpack.dll,DelNodeRunDLL32 C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\IXP000.TMP\"

Dropped PE files

MD5 File path
c06ea58b765217a2d690a2035e87018c c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\IXP000.TMP\eee.exe
1f35ef207be6a24c804d621e0ef3d4bf c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\IXP000.TMP\lspsurf.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

VersionInfo

Company Name: Autodesk, Inc
Product Name: AutoCAD
Product Version: 17.2.56.0
Legal Copyright: Copyright (c) 1982-2008 by Autodesk, Inc.
Legal Trademarks:
Original Filename: lspsurf.exe
Internal Name: lspsurf.exe
File Version: 17.2.56.0
File Description:
Comments:
Language: Language Neutral

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 39212 39424 4.55076 7417231ca1140fb5cb6c85cb43ba7e83
.data 45056 7140 1024 2.94449 99858e86526942a66950c7139f78a725
.rsrc 53248 62340 62464 5.24942 47d3f16c076d9a25da67a4c0a4efacfc

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

URL IP
hxxp://zone.yourfreehosting.net/new.exe 72.52.4.120
hxxp://e6845.ce.akamaiedge.net/pca3.crl
hxxp://e6845.ce.akamaiedge.net/CSC3-2004.crl
hxxp://crl.verisign.com/pca3.crl 23.51.117.163
hxxp://CSC3-2004-crl.verisign.com/CSC3-2004.crl
csc3-2004-crl.verisign.com 23.51.117.163


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /CSC3-2004.crl HTTP/1.1
Accept: */*
User-Agent: Microsoft-CryptoAPI/5.131.2600.5512
Host: CSC3-2004-crl.verisign.com
Connection: Keep-Alive
Cache-Control: no-cache
Pragma: no-cache


HTTP/1.1 200 OK
Server: Apache
ETag: "ebe17570c320308aa2ad2ace99e2cd49:1423602313"
Last-Modified: Tue, 10 Feb 2015 21:05:13 GMT
Date: Wed, 11 Feb 2015 06:36:57 GMT
Transfer-Encoding:  chunked
Connection: keep-alive
Connection: Transfer-Encoding
Content-Type: application/pkix-crl
00006000..0..y.0..x.0...*.H........0..1.0...U....US1.0...U....VeriSign
, Inc.1.0...U....VeriSign Trust Network1;09..U...2Terms of use at http
s://VVV.verisign.com/rpa (c)041.0,..U...%VeriSign Class 3 Code Signing
 2004 CA..150210210001Z..150220210001Z0..w.0!.....'...._.=.t.{...06041
1095352Z0!........]...n.d.^...041210180734Z0!....B.38..I....Z.Z..06052
2202503Z0!.....V..=.&..p.K_...041223173514Z0!...$fd{........ZKI..05072
7182105Z0!...'..P..Tk....i ...081114114704Z0!...*m.......$.e.iw..05011
3162826Z0!...4..&.....(.V.bD..060717184318Z0!...>.h`a.nZM.VIP....06
1027222850Z0!...?..!.....Z..%....080514074106Z0!...A.*T-.NB>Ro.S.~.
.070627153307Z0!...Wf....0?.1.<G4...080827011731Z0!...[.}7.8.t.....
....070607081209Z0!...^[email protected]..`..061207041025Z0!...ol4....{.....
....080520210256Z0!.....oP...._. .a....061205224400Z0!.....}...../5.=.
....041018225848Z0!.....B.w5$.h..,."...060707142917Z0!....]....d......
....041217144015Z0!.........1.9.fwI.a..050926191715Z0!............*.&g
t;W....041221185802Z0!...."....J..l.......050712133504Z0!....X.r..'7hK
._.....080804054612Z0!....Q)..6.....4.[...051018015040Z0!.........Y.=.
U=y....060308034429Z0!....:..I.. ......Y..060912161745Z0!......t..Au..
.e `...060406020106Z0!........&.zR.....J..080220163354Z0!...%.&.f./...
.>.H...070216105424Z0!...8....n..#b.dM....090505134237Z0!...E..1..&
gt;..........070621145128Z0!...L.k'.W..!.;w0....060711202546Z0!...U...
....Te.c.....080829025216Z0!...qo..b..>...C.....081214140650Z0!....
...?....War.y...061019142712Z0!.......^i7.6_m..W...070122210641Z0!
<<< skipped >>>


GET /pca3.crl HTTP/1.1
Accept: */*
User-Agent: Microsoft-CryptoAPI/5.131.2600.5512
Host: crl.verisign.com
Connection: Keep-Alive
Cache-Control: no-cache
Pragma: no-cache


HTTP/1.1 200 OK
Server: Apache
ETag: "66304c4a5660ab8615727e6bb27b3cdb:1418950819"
Last-Modified: Fri, 19 Dec 2014 01:00:19 GMT
Date: Wed, 11 Feb 2015 06:36:57 GMT
Content-Length: 933
Connection: keep-alive
Content-Type: application/pkix-crl
0...0...0...*.H........0_1.0...U....US1.0...U....VeriSign, Inc.1705..U
....Class 3 Public Primary Certification Authority..141210000000Z..150
331235959Z0..x0!...v....a_>..2......020924164823Z0!.....A.....{2..Y
.#..140129175709Z0!...,.|.|...<...j ...080605174907Z0!...`y..q.....
..fh...020923171400Z0!...?A....a.nF`.P....020923171548Z0!............R
.e.53..010207212458Z0!..!......Y...ISi....010706171411Z0!..$-..I{r....
u<._...080403172226Z0!..&.."?..y..51}..1..010706172118Z0!..4....2..
..{W......080605175030Z0!..B....c............070411175910Z0!..H.Py...N
....* [email protected]!..Y......w
`G........070411175657Z0!..Z`[email protected].*q..080403172017Z0!..l....I..
.Y..] .c..010706171749Z0"......T=deQ...1u.]...010207212247Z0".....p..1
..7<.....e..010207211822Z0...*.H............5..v...V.._)....A... ..
..>.5]....6.(.0uFW.*:T...6$.....R...Y.N.k........%Jn..I.j*.6.3~...r
../[email protected]?....0.A.HTTP/1.1 200 OK..Server: Apache.
.ETag: "66304c4a5660ab8615727e6bb27b3cdb:1418950819"..Last-Modified: F
ri, 19 Dec 2014 01:00:19 GMT..Date: Wed, 11 Feb 2015 06:36:57 GMT..Con
tent-Length: 933..Connection: keep-alive..Content-Type: application/pk
ix-crl..0...0...0...*.H........0_1.0...U....US1.0...U....VeriSign, Inc
.1705..U....Class 3 Public Primary Certification Authority..1412100000
00Z..150331235959Z0..x0!...v....a_>..2......020924164823Z0!.....A..
...{2..Y.#..140129175709Z0!...,.|.|...<...j ...080605174907Z0!...`y
..q.......fh...020923171400Z0!...?A....a.nF`.P....020923171548Z0!.
<<< skipped >>>

The Trojan-Dropper connects to the servers at the folowing location(s):

%original file name%.exe_944:

.text
`.data
.rsrc
ADVAPI32.dll
KERNEL32.dll
NTDLL.DLL
GDI32.dll
USER32.dll
COMCTL32.dll
VERSION.dll
advapi32.dll
advpack.dll
wininit.ini
Software\Microsoft\Windows\CurrentVersion\App Paths
setupapi.dll
setupx.dll
IXPd.TMP
TMP4351$.TMP
FINISHMSG
USRQCMD
ADMQCMD
msdownld.tmp
wextract.pdb
PSSSSSSh
RegCloseKey
RegOpenKeyExA
RegCreateKeyExA
RegQueryInfoKeyA
GetWindowsDirectoryA
ExitWindowsEx
MsgWaitForMultipleObjects
rundll32.exe %s,InstallHinfSection %s 128 %s
SHELL32.DLL
Software\Microsoft\Windows\CurrentVersion\RunOnce
PendingFileRenameOperations
System\CurrentControlSet\Control\Session Manager\FileRenameOperations
wextract_cleanup%d
%s /D:%s
rundll32.exe %sadvpack.dll,DelNodeRunDLL32 "%s"
Command.com /c %s
C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\IXP000.TMP\
eee.exe
lspsurf.exe
%]W5.KI%
l.uE)
8x%Skpv
SQL9YQ
"lspsurf.exe"
"eee.exe"
Please read the following license agreement. Press the PAGE DOWN key to see the rest of the agreement.
CFailed to get disk space information from: %s.
System Message: %s.&A required resource cannot be located. Are you sure you want to cancel?
8Unable to retrieve operating system version information.!Memory allocation request failed.
Filetable full.Ên not change to destination folder.
Setup could not find a drive with %s KB free disk space to install the program. Please free up some space first and press RETRY or press CANCEL to exit setup.KThat folder is invalid. Please make sure the folder exists and is writable.IYou must specify a folder with fully qualified pathname or choose Cancel.!Could not update folder edit box.5Could not load functions required for browser dialog.7Could not load Shell32.dll required for browser dialog.
(Error creating process <%s>. Reason: %s1The cluster size in this system is not supported.,A required resource appears to be corrupted.QWindows 95 or Windows NT 4.0 Beta 2 or greater is required for this installation.
Error loading %shGetProcAddress() failed on function '%s'. Possible reason: incorrect version of advpack.dll being used./Windows 95 or Windows NT is required to install
Could not create folder '%s'
To install this program, you need %s KB disk space on drive %s. It is recommended that you free up the required disk space before you continue.
Error retrieving Windows folder
$NT Shutdown: OpenProcessToken error.)NT Shutdown: AdjustTokenPrivileges error.!NT Shutdown: ExitWindowsEx error.}Extracting file failed. It is most likely caused by low memory (low disk space for swapping file) or corrupted Cabinet file.aThe setup program could not retrieve the volume information for drive (%s) .
System message: %s.xSetup could not find a drive with %s KB free disk space to install the program. Please free up some space and try again.eThe installation program appears to be damaged or corrupted. Contact the vendor of this application.
/C:<Cmd> -- Override Install Command defined by author.
eAnother copy of the '%s' package is already running on your system. Do you want to run another copy?
Could not find the file: %s.
:The folder '%s' does not exist. Do you want to create it?hAnother copy of the '%s' package is already running on your system. You can only run one copy at a time.OThe '%s' package is not compatible with the version of Windows you are running.SThe '%s' package is not compatible with the version of the file: %s on your system.
17.2.56.0
17.2.0.0


Remove it with Ad-Aware

  1. Click (here) to download and install Ad-Aware Free Antivirus.
  2. Update the definition files.
  3. Run a full scan of your computer.


Manual removal*

  1. Terminate malicious process(es) (How to End a Process With the Task Manager):

    eee.exe:660
    %original file name%.exe:944

  2. Delete the original Trojan-Dropper file.
  3. Delete or disinfect the following files created/modified by the Trojan-Dropper:

    %Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\Content\A8FABA189DB7D25FBA7CAC806625FD30 (96 bytes)
    %Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\Content\60E31627FDA0A46932B0E5948949F2A5 (933 bytes)
    %Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\MetaData\60E31627FDA0A46932B0E5948949F2A5 (164 bytes)
    %Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\MetaData\A8FABA189DB7D25FBA7CAC806625FD30 (224 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\test.htm (6 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\eee.exe (1568 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\lspsurf.exe (2892 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce]
    "wextract_cleanup0" = "rundll32.exe %System%\advpack.dll,DelNodeRunDLL32 C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\IXP000.TMP\"

  5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
  6. Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

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