Gen.Variant.Barys.53633_5a3f92a92c – Adaware

HEUR:Trojan.Win32.Generic (Kaspersky), Gen:Variant.Barys.53633 (B) (Emsisoft), Gen:Variant.Barys.53633 (AdAware), Backdoor.Win32.Farfli.FD, Backdoor.Win32.Xtrat.FD, Trojan.Win32.IEDummy.FD, GenericAutorunWorm.YR, GenericInjector.YR (Lavasoft MAS)Behaviour: Trojan, Backdoor, Worm, WormAutorun

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

Summary

MD5: 5a3f92a92c1fd9542172179dec6d362b

SHA1: eaaa75506500b2ac1cd68e03adefbb2022964fce

SHA256: 8b021c9842bf92867297fd8f8609f40f76151934affc2a93ab0ff10a932bfa64

SSDeep: 6144:R2GhNoBLL/nAwpCwlTLFD6cNbcQQO6O8WYxqgVLgIvnRBDkZ4icIZV1NNXq:R2iNyLF6cNbxDljYx5sI/G4uw

Size: 362596 bytes

File type: EXE

Platform: WIN32

Entropy: Packed

PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6

Company: no certificate found

Created at: 2015-10-10 23:31:55

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

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 Trojan's file once a user opens a drive's folder in Windows Explorer.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:1108
Yewzjyuhur.exe:1088

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

svchost.exe:2016
iexplore.exe:1784

Mutexes

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

File activity

The process %original file name%.exe:1108 makes changes in the file system.

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

%Documents and Settings%\%current user%\Local Settings\Temp\Yewzjyuhur.exe (4708 bytes)

The process Yewzjyuhur.exe:1088 makes changes in the file system.

The Trojan 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:1108 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1A 76 3F 01 B7 36 F6 94 EF B6 3F E8 71 EF 77 94"

[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"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Local Settings\Temp]
"Yewzjyuhur.exe" = "Yewzjyuhur"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

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

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

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

The Trojan modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:

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

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:

"UNCAsIntranet" = "1"

The Trojan modifies IE settings for security zones to map all urls to the Intranet Zone:

"IntranetName" = "1"

The process Yewzjyuhur.exe:1088 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "DB 2D A7 D7 2A 5D 36 59 5C 6B 9C 81 B7 E7 EA B1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[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"

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

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

[HKCU\Software\XtremeRAT]
"Mutex" = "D8V4hZo5G"

Dropped PE files

MD5	File path
260a87d19dbd307c06b2be851d9b4f1d	c:\Documents and Settings\"%CurrentUserName%"\Application Data\InstallDir\svchost.exe
260a87d19dbd307c06b2be851d9b4f1d	c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\Yewzjyuhur.exe

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 Trojan'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:1108
Yewzjyuhur.exe:1088
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
%Documents and Settings%\%current user%\Local Settings\Temp\Yewzjyuhur.exe (4708 bytes)
Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
Reboot the computer.

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

Static Analysis

VersionInfo

Company Name:
Product Name:
Product Version: 1.0.0.0
Legal Copyright:
Legal Trademarks:
Original Filename: Software.exe
Internal Name: Software.exe
File Version: 1.0.0.0
File Description:
Comments:
Language: English (United States)

Company Name: Product Name: Product Version: 1.0.0.0Legal Copyright: Legal Trademarks: Original Filename: Software.exeInternal Name: Software.exeFile Version: 1.0.0.0File Description: Comments: Language: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	8192	323924	324096	5.36452	539db6afce603e6a293fcedd111a79d3
.sdata	335872	126	512	1.29372	9f8d18efca8c7e95c060707261b6a7b0
.rsrc	344064	2520	2560	2.77683	7644664b435e6caf7ef0caf8a0837410
.reloc	352256	12	512	0.070639	b441ccce7f015b4e756a606707958a5f

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

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

svchost.exe_2016:

.text

`.data

.rsrc

ADVAPI32.dll

KERNEL32.dll

NTDLL.DLL

RPCRT4.dll

NETAPI32.dll

ole32.dll

ntdll.dll

RegCloseKey

RegOpenKeyExW

GetProcessHeap

NtOpenKey

svchost.pdb

\PIPE\

Software\Microsoft\Windows NT\CurrentVersion\Svchost

\Registry\Machine\System\CurrentControlSet\Control\SecurePipeServers\

5.1.2600.5512 (xpsp.080413-2111)

svchost.exe

Windows

Operating System

5.1.2600.5512

svchost.exe_2016_rwx_10000000_0004D000:

`.rsrc

ServerKeyloggerU

789:;

%SERVER%

URLMON.DLL

shell32.dll

hXXp://

advapi32.dll

kernel32.dll

mpr.dll

version.dll

comctl32.dll

gdi32.dll

opengl32.dll

user32.dll

wintrust.dll

msimg32.dll

KWindows

TServerKeylogger

GetWindowsDirectoryW

RegOpenKeyExW

RegCreateKeyW

RegCloseKey

RegOpenKeyExA

FindExecutableW

ShellExecuteW

SHDeleteKeyW

URLDownloadToCacheFileW

UnhookWindowsHookEx

SetWindowsHookExW

MapVirtualKeyW

GetKeyboardLayout

GetKeyState

GetKeyboardType

GetKeyboardState

FtpPutFileW

FtpSetCurrentDirectoryW

.idata

.rdata

P.reloc

P.rsrc

URLDb

KERNEL32.DLL

ntdll.dll

oleaut32.dll

shlwapi.dll

wininet.dll

x.html

HKEY_CLASSES_ROOT

HKEY_CURRENT_USER

HKEY_LOCAL_MACHINE

HKEY_USERS

HKEY_CURRENT_CONFIG

[Execute]

KeyDelBackspace

.html

XtremeKeylogger

Software\Microsoft\Windows\CurrentVersion\Run

.functions

icon=shell32.dll,4

shellexecute=

autorun.inf

\Microsoft\Windows\

ÞFAULTBROWSER%

svchost.exe

pedrinhomitador.no-ip.org

C:\Windows\system32\WINNSI.pedrinhomitador.no-ip.org

C:\Windows\system32\WINNSI.

{RJ5447FU-OW36-0W3T-405L-P61S5K3JFJJB}

HKCU\Software\Microsoft\Windows\CurrentVersion\Run

Bin%SERVER%

ftpuser

PTF.ftpserver.com

iexplore.exe_1784:

%?9-*09,*19}*09

.text

`.data

.rsrc

msvcrt.dll

KERNEL32.dll

NTDLL.DLL

USER32.dll

SHLWAPI.dll

SHDOCVW.dll

Software\Microsoft\Windows\CurrentVersion\Explorer\BrowseNewProcess

IE-X-X

rsabase.dll

System\CurrentControlSet\Control\Windows

dw15 -x -s %u

watson.microsoft.com

IEWatsonURL

%s -h %u

iedw.exe

Iexplore.XPExceptionFilter

jscript.DLL

mshtml.dll

mlang.dll

urlmon.dll

wininet.dll

shdocvw.DLL

browseui.DLL

comctl32.DLL

IEXPLORE.EXE

iexplore.pdb

ADVAPI32.dll

MsgWaitForMultipleObjects

IExplorer.EXE

IIIIIB(II<.fg>

7?_____ZZSSH%

)z.UUUUUUUU

,....Qym

````2```

{.QLQIIIKGKGKGKGKGKG

;33;33;0

8888880

8887080

browseui.dll

shdocvw.dll

6.00.2900.5512 (xpsp.080413-2105)

Windows

Operating System

6.00.2900.5512

iexplore.exe_1784_rwx_10000000_0004D000:

`.rsrc

ServerKeyloggerU

789:;

%SERVER%

URLMON.DLL

shell32.dll

hXXp://

advapi32.dll

kernel32.dll

mpr.dll

version.dll

comctl32.dll

gdi32.dll

opengl32.dll

user32.dll

wintrust.dll

msimg32.dll

KWindows

TServerKeylogger

GetWindowsDirectoryW

RegOpenKeyExW

RegCreateKeyW

RegCloseKey

RegOpenKeyExA

FindExecutableW

ShellExecuteW

SHDeleteKeyW

URLDownloadToCacheFileW

UnhookWindowsHookEx

SetWindowsHookExW

MapVirtualKeyW

GetKeyboardLayout

GetKeyState

GetKeyboardType

GetKeyboardState

FtpPutFileW

FtpSetCurrentDirectoryW

.idata

.rdata

P.reloc

P.rsrc

URLDb

KERNEL32.DLL

ntdll.dll

oleaut32.dll

shlwapi.dll

wininet.dll

x.html

HKEY_CLASSES_ROOT

HKEY_CURRENT_USER

HKEY_LOCAL_MACHINE

HKEY_USERS

HKEY_CURRENT_CONFIG

[Execute]

KeyDelBackspace

.html

XtremeKeylogger

Software\Microsoft\Windows\CurrentVersion\Run

.functions

icon=shell32.dll,4

shellexecute=

autorun.inf

\Microsoft\Windows\

ÞFAULTBROWSER%

svchost.exe

pedrinhomitador.no-ip.org

C:\Windows\system32\WINNSI.pedrinhomitador.no-ip.org

C:\Windows\system32\WINNSI.

{RJ5447FU-OW36-0W3T-405L-P61S5K3JFJJB}

HKCU\Software\Microsoft\Windows\CurrentVersion\Run

Bin%SERVER%

ftpuser

PTF.ftpserver.com

%Documents and Settings%\%current user%\Local Settings\Temp\Yewzjyuhur.exe

%Program Files%\Internet Explorer\iexplore.exe