Gen.Variant.MSIL.8_d90a0bc0aa – Adaware

HEUR:Trojan.Win32.Generic (Kaspersky), Gen:Variant.MSIL.8 (B) (Emsisoft), Gen:Variant.MSIL.8 (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: d90a0bc0aa133e31194451e9e7ffa1d0

SHA1: 89ca3cac79b3266f1637185312f5f89dbe7a773a

SHA256: ce18ba05eb8a388927778bf307cc4d0bdefd20ff7d62f035e6ce5525ffe4272f

SSDeep: 1536:zYo8jHrf4vZV1kKZPBurf3JoouhUQ/5i2biwk:IYvGKxy3rAhBXid

Size: 81920 bytes

File type: EXE

Platform: WIN32

Entropy: Not Packed

PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6

Company: no certificate found

Created at: 2015-10-06 17:04:35

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:424
%original file name%.exe:1108

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

svchost.exe:1260
iexplore.exe:1672

Mutexes

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

File activity

The process %original file name%.exe:424 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)

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%\Application DataMicrosoft\System\Services\18.exe (601 bytes)

Registry activity

The process %original file name%.exe:424 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "D9 84 8B BF A0 08 83 F7 64 6D D4 F1 B3 57 68 53"

[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" = "G9uJ8h"

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" = "2E 1C E7 9B F4 F4 1E 9B 20 E7 D8 99 37 59 61 12"

[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"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"18.exe" = "%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"18.exe" = "%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe"

Dropped PE files

There are no dropped PE files.

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:424
%original file name%.exe:1108
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe (601 bytes)
Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"18.exe" = "%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"18.exe" = "%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe"
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: Zz98EiHn0s
Product Name: Aa6m5X
Product Version: 38.10.15.23
Legal Copyright: c0Y3H
Legal Trademarks: Bz6o7T8Sk
Original Filename: gka43s1n.exe
Internal Name: gka43s1n.exe
File Version: 38.10.15.23
File Description: z8RDo10Yr
Comments: b4WDd96Mf
Language: English (United States)

Company Name: Zz98EiHn0sProduct Name: Aa6m5XProduct Version: 38.10.15.23Legal Copyright: c0Y3HLegal Trademarks: Bz6o7T8SkOriginal Filename: gka43s1n.exeInternal Name: gka43s1n.exeFile Version: 38.10.15.23File Description: z8RDo10YrComments: b4WDd96MfLanguage: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	8192	63604	65536	4.91094	b7db72617783763ec7051b0df0587125
.sdata	73728	99	4096	0.168716	64221dfdaad9cd6de899ce33dbb9872c
.rsrc	81920	936	4096	0.687606	d2bec33528e362e24360498f4fdfc36d
.reloc	90112	12	4096	0.011373	573cf03801c67e7eb112f34f271b5fcb

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_1260:

.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_1260_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

riable>PortMappingNumberOfEntr

NewPortMappingIndex

KWindows

TServerKeylogger

".KS|[

GetWindowsDirectoryW

RegOpenKeyExW

RegCreateKeyW

RegCloseKey

RegOpenKeyExA

FindExecutableW

ShellExecuteW

SHDeleteKeyW

URLDownloadToCacheFileW

UnhookWindowsHookEx

SetWindowsHookExW

MapVirtualKeyW

GetKeyboardLayout

GetKeyState

GetKeyboardType

GetKeyboardState

FtpPutFileW

FtpSetCurrentDirectoryW

.idata

.rdata

P.reloc

P.rsrc

%sodByt@

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

desire.noip.me

Possibldesire.noip.me

ftpuser

Server.exe

{3V1V652R-SS22-120A-6AU1-M5457LWL6666}

HKCU\Software\Microsoft\Windows\CurrentVersion\Run

PTF.ftpserver.com

iexplore.exe_1672:

%?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_1672_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

riable>PortMappingNumberOfEntr

NewPortMappingIndex

KWindows

TServerKeylogger

".KS|[

GetWindowsDirectoryW

RegOpenKeyExW

RegCreateKeyW

RegCloseKey

RegOpenKeyExA

FindExecutableW

ShellExecuteW

SHDeleteKeyW

URLDownloadToCacheFileW

UnhookWindowsHookEx

SetWindowsHookExW

MapVirtualKeyW

GetKeyboardLayout

GetKeyState

GetKeyboardType

GetKeyboardState

FtpPutFileW

FtpSetCurrentDirectoryW

.idata

.rdata

P.reloc

P.rsrc

%sodByt@

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

desire.noip.me

Possibldesire.noip.me

ftpuser

Server.exe

{3V1V652R-SS22-120A-6AU1-M5457LWL6666}

HKCU\Software\Microsoft\Windows\CurrentVersion\Run

PTF.ftpserver.com

c:\%original file name%.exe

%Program Files%\Internet Explorer\iexplore.exe