Gen.Heur.SMHeist.2_578ed484c9

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:1740
crypt.exe:888
WScript.exe:228

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

crypt.exe:464
WScript.exe:464

Mutexes

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

File activity

The process %original file name%.exe:1740 makes changes in the file system.

The Trojan creates and/or writes to the following file(s):

%Program Files%\Gorn\Gorn\prostoigra.bat (1 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\$inst\temp_0.tmp (196 bytes)
%Program Files%\Gorn\Gorn\2.txt (27 bytes)
%Program Files%\Gorn\Gorn\Uninstall.exe (4989 bytes)
%Program Files%\Gorn\Gorn\crypt.exe (979 bytes)
%Program Files%\Gorn\Gorn\neznoesvidanie.vbs (276 bytes)
%Program Files%\Gorn\Gorn\dns_bablo.vbs (817 bytes)
%Program Files%\Gorn\Gorn\Uninstall.ini (2 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\$inst\2.tmp (68 bytes)
%Program Files%\Gorn\Gorn\1.txt (16 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\$inst (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\$inst\2.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\$inst\temp_0.tmp (0 bytes)

The process WScript.exe:228 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)

Registry activity

The process %original file name%.exe:1740 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Gorn 1.3]
"EstimatedSize" = "179"
"Publisher" = "Gorn"

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Gorn 1.3]
"DisplayIcon" = "%Program Files%\Gorn\Gorn\Uninstall.exe"

[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\Uninstall\Gorn 1.3]
"NoModify" = "1"
"UninstallString" = "%Program Files%\Gorn\Gorn\Uninstall.exe"

[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"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Gorn 1.3]
"DisplayName" = "Gorn 1.3"
"InstallDate" = "20150117"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Documents" = "%Documents and Settings%\All Users\Documents"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Gorn 1.3]
"NoRepair" = "1"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Program Files%\Gorn\Gorn]
"crypt.exe" = "Vamp"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%System%]
"wscript.exe" = "Microsoft (R) Windows Based Script Host"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Program Files%\Gorn\Gorn]
"prostoigra.bat" = "prostoigra"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "3F 3A 5D 01 05 B9 D8 2C BF 00 16 CB BB F0 55 8E"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Gorn 1.3]
"VersionMajor" = "1"

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Gorn 1.3]
"InstallSource" = "c:\"

[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\Uninstall\Gorn 1.3]
"Language" = "1033"
"VersionMinor" = "3"
"InstallLocation" = "%Program Files%\Gorn\Gorn\"
"DisplayVersion" = "1.3"

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"

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Gorn" = "%Program Files%\Gorn\Gorn\crypt.exe"

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 process crypt.exe:464 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "38 AA 53 6B 81 51 FD 07 70 C9 55 8A 02 F0 3C 34"

[HKCU\Software\NVIDIA Corporation\Global\nvUpdate]
"Value" = "20150108"
"Guid" = "c2316aa7-818e-4876-9b98-07aa7935e0f3"

The process crypt.exe:888 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "6D C4 F4 FF 50 03 44 72 6D B6 43 5E E7 93 DB FA"

[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 WScript.exe:464 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "EF CC D8 AC 4C CF F4 CC E8 33 7E FF A1 03 3B C3"

The process WScript.exe:228 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" = "65452"
"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" = "65452"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

"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\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" = "65452"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 16 00 00 00 01 00 00 00 00 00 00 00"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "EC 21 CA 33 80 A1 9C A0 90 8E 5D 87 F6 2F 89 9B"

[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\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

MD5	File path
e3e0d8d110b52b93ffab9842516ed8ec	c:\Program Files\Gorn\Gorn\Uninstall.exe
78c365012a03fcd0c976d961464a4064	c:\Program Files\Gorn\Gorn\crypt.exe

HOSTS file anomalies

The Trojan modifies "%System%\drivers\etc\hosts" file which is used to translate DNS entries to IP addresses. The modified file is 1165 bytes in size. The following strings are added to the hosts file listed below:

108.61.165.61	my.mail.ru
108.61.165.61	m.my.mail.ru
108.61.165.61	vk.com
108.61.165.61	ok.ru
108.61.165.61	m.vk.com
108.61.165.61	odnoklassniki.ru
108.61.165.61	vk.com
108.61.165.61	www.odnoklassniki.ru
108.61.165.61	m.odnoklassniki.ru
108.61.165.61	ok.ru
108.61.165.61	m.ok.ru
108.61.165.61	www.odnoklassniki.ru
108.61.165.61	sotialmonstercookie.ru
217.20.152.226	st.mycdn.me
217.20.156.72	mycdn.me

Rootkit activity

No anomalies have been detected.

Propagation

Removals

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):

   %original file name%.exe:1740
   crypt.exe:888
   WScript.exe:228

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

   %Program Files%\Gorn\Gorn\prostoigra.bat (1 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\$inst\temp_0.tmp (196 bytes)
   %Program Files%\Gorn\Gorn\2.txt (27 bytes)
   %Program Files%\Gorn\Gorn\Uninstall.exe (4989 bytes)
   %Program Files%\Gorn\Gorn\crypt.exe (979 bytes)
   %Program Files%\Gorn\Gorn\neznoesvidanie.vbs (276 bytes)
   %Program Files%\Gorn\Gorn\dns_bablo.vbs (817 bytes)
   %Program Files%\Gorn\Gorn\Uninstall.ini (2 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\$inst\2.tmp (68 bytes)
   %Program Files%\Gorn\Gorn\1.txt (16 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)

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

   [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   "Gorn" = "%Program Files%\Gorn\Gorn\crypt.exe"

5. Restore the original content of the HOSTS file (%System%\drivers\etc\hosts): 127.0.0.1 localhost
   
6. Reboot the computer.
   

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

Static Analysis

VersionInfo

Company Name: Gorn
Product Name:
Product Version:
Legal Copyright: Gorn
Legal Trademarks:
Original Filename:
Internal Name:
File Version: 1.3
File Description: Gorn 1.3 Installation
Comments:
Language: Spanish (Spain, International Sort)

Company Name: Gorn Product Name: Product Version: Legal Copyright: Gorn Legal Trademarks: Original Filename: Internal Name: File Version: 1.3File Description: Gorn 1.3 Installation Comments: Language: Spanish (Spain, International Sort)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
CODE	4096	148684	148992	4.57087	bac8bae7a5e5326cf49943b90d1c062a
DATA	155648	10388	10752	2.62963	abafcbfbd7f8ac0226ca496a92a0cf06
BSS	167936	4341	0	0	d41d8cd98f00b204e9800998ecf8427e
.idata	176128	6040	6144	3.38637	7a4934595db0efc364c3982c4e335d8c
.tls	184320	8	0	0	d41d8cd98f00b204e9800998ecf8427e
.rdata	188416	24	512	0.14174	c4fdd0c5c9efb616fcc85d66056ca490
.reloc	192512	6276	6656	4.56552	867a1120317d51734587a74f6ee70016
.rsrc	200704	17716	17920	4.23731	37d7c69179fd9026e20bc284cac35cd0

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 3
8fa1d401efdc8f2d6f38889e0ff3ae17
1a9e563e5c736d2d50c73ed1baeb96c2
f348e9bdf1b1048e57e6294acffc3f08

Network Activity

URLs

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Map

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

Strings from Dumps

wuauclt.exe_1252:

.text

.text

`.data

`.data

.rsrc

.rsrc

@.reloc

@.reloc

wuauclt.pdb

wuauclt.pdb

GetProcessHeap

GetProcessHeap

KERNEL32.dll

KERNEL32.dll

_wcmdln

_wcmdln

_amsg_exit

_amsg_exit

msvcrt.dll

msvcrt.dll

ntdll.dll

ntdll.dll

ole32.dll

ole32.dll

RegCloseKey

RegCloseKey

RegOpenKeyExW

RegOpenKeyExW

RegCreateKeyExW

RegCreateKeyExW

ADVAPI32.dll

ADVAPI32.dll

USER32.dll

USER32.dll

OLEAUT32.dll

OLEAUT32.dll

SHLWAPI.dll

SHLWAPI.dll

zcÁ

zcÁ

version="6.0.0.0"

version="6.0.0.0"

name="Microsoft.Windows.windowsupdate.wuauclt"

name="Microsoft.Windows.windowsupdate.wuauclt"

true

true

name="Microsoft.Windows.Common-Controls"

name="Microsoft.Windows.Common-Controls"

publicKeyToken="6595b64144ccf1df"

publicKeyToken="6595b64144ccf1df"

wuaueng.dll

wuaueng.dll

Error: 0xx. wuauclt handler: failed to spawn COM server

Error: 0xx. wuauclt handler: failed to spawn COM server

Error: 0xx. wuauclt handler: failed to load wuaueng

Error: 0xx. wuauclt handler: failed to load wuaueng

/ReportNow

/ReportNow

/ShowWindowsUpdate

/ShowWindowsUpdate

/CloseWindowsUpdate

/CloseWindowsUpdate

wuauclt.exe failed to get proc address for UI export object with error %#lx

wuauclt.exe failed to get proc address for UI export object with error %#lx

Failed to load %s with error %X

Failed to load %s with error %X

wucltui.dll

wucltui.dll

wucltux.dll

wucltux.dll

call RunAUClientUI on wucltui.dll/wucltux.dll

call RunAUClientUI on wucltui.dll/wucltux.dll

Ntdll.dll

Ntdll.dll

WuSqm %ls session datapoint (id:%d) is incremented with dword %d.

WuSqm %ls session datapoint (id:%d) is incremented with dword %d.

wuauclt.exe is exiting with code 0xX

wuauclt.exe is exiting with code 0xX

wuauclt.exe launched with command line %s

wuauclt.exe launched with command line %s

kernel32.dll

kernel32.dll

WUWeb

WUWeb

Report

Report

7.6.7600.256

7.6.7600.256

Global\WindowsUpdateTracingMutex

Global\WindowsUpdateTracingMutex

WindowsUpdate.log

WindowsUpdate.log

SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Trace

SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Trace

Windows

Windows

shell32.dll

shell32.dll

%s: %s [

%s: %s [

%s: %s

%s: %s

%s\%s

%s\%s

= Module: %s

= Module: %s

= Module:

= Module:

= Process: %s

= Process: %s

= Process:

= Process:

=========== Logging initialized (build: %s, tz: %s) ===========

=========== Logging initialized (build: %s, tz: %s) ===========

wups2.dll

wups2.dll

wups.dll

wups.dll

Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\Setup\ServiceStartup\

Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\Setup\ServiceStartup\

%hs %ls page "%ls", hr=%X

%hs %ls page "%ls", hr=%X

Microsoft.WindowsUpdate

Microsoft.WindowsUpdate

wupdmgr.exe

wupdmgr.exe

Failed to cocreate IShellWindows, error = 0xlX

Failed to cocreate IShellWindows, error = 0xlX

Failed to obtain window doc for window %d, error = 0xlX

Failed to obtain window doc for window %d, error = 0xlX

Failed to obtain folder view for window %d, error = 0xlX

Failed to obtain folder view for window %d, error = 0xlX

Failed to obtain folder IPersist for window %d, error = 0xlX

Failed to obtain folder IPersist for window %d, error = 0xlX

Window %d is NOT a WU window

Window %d is NOT a WU window

Done enumerating windows

Done enumerating windows

Quit for window %d failed: 0xlX

Quit for window %d failed: 0xlX

Window %d is a WU window. Attempting to close

Window %d is a WU window. Attempting to close

Failed to obtain class ID for window %d, error = 0xlX

Failed to obtain class ID for window %d, error = 0xlX

Got NULL disp interface for window %d

Got NULL disp interface for window %d

Got %d instead of VT_DISPATCH for window %d

Got %d instead of VT_DISPATCH for window %d

Failed to obtain IWebBrowserApp for window %d, error = 0xlX

Failed to obtain IWebBrowserApp for window %d, error = 0xlX

Failed to enumerate window %d, error = 0xlX

Failed to enumerate window %d, error = 0xlX

Found %d explorer windows

Found %d explorer windows

Closing WU explorer windows

Closing WU explorer windows

Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\VolatileData

Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\VolatileData

WUAppNotificationWindows

WUAppNotificationWindows

SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\RebootRequired

SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\RebootRequired

SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\RebootRequired\Mandatory

SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\RebootRequired\Mandatory

SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\PostRebootReporting

SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\PostRebootReporting

SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Services\Pending\

SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Services\Pending\

%chdhd

%chdhd