Win32.Virtob.Gen.12_67a6ced30a – Adaware

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

ntvdm.exe:2224

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

%original file name%.exe:4008

Mutexes

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

File activity

The process %original file name%.exe:4008 makes changes in the file system.

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

C:\67a6ced30a5ac7ce9c3612e0502c09f8.usr (50117 bytes)
C:\Windows\System32\USR_Shohdi_Photo_USR.rsu (21682 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Adobe\Reader 9.3\Setup Files\Reader9\Setup.exe (444160 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Adobe\Reader 9.3\Setup Files\Setup.exe (408872 bytes)
C:\Windows\USR_Shohdi_Photo_USR.exe (6889074 bytes)

The Trojan deletes the following file(s):

C:\Users\"%CurrentUserName%"\AppData\Local\Adobe\Reader 9.3\Setup Files\Reader9\Setup.usr (0 bytes)
C:\Windows\System32\USR_Shohdi_Photo_USR.rsu (0 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Adobe\Reader 9.3\Setup Files\Setup.usr (0 bytes)

The process ntvdm.exe:2224 makes changes in the file system.

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

C:\Users\"%CurrentUserName%"\AppData\Local\Temp\scs2FD6.tmp (335 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\scs31EA.tmp (269 bytes)

The Trojan deletes the following file(s):

C:\Users\"%CurrentUserName%"\AppData\Local\Temp\scs2FD6.tmp (0 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\scs31EA.tmp (0 bytes)

Registry activity

Dropped PE files

MD5	File path
ae4dfe9f4809b33e06ad8ec487d646ca	c:\67a6ced30a5ac7ce9c3612e0502c09f8.usr

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 864 bytes in size. The following strings are added to the hosts file listed below:

127.0.0.1	jL.chura.pl
127.0.0.1	validation.sls.microsoft.com

Rootkit activity

The Trojan installs the following user-mode hooks in ntdll.dll:

NtQueryInformationProcess
ZwOpenFile
NtDeviceIoControlFile
ZwCreateUserProcess
ZwCreateProcessEx
NtCreateProcess
ZwCreateFile

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):
ntvdm.exe:2224
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
C:\67a6ced30a5ac7ce9c3612e0502c09f8.usr (50117 bytes)
C:\Windows\System32\USR_Shohdi_Photo_USR.rsu (21682 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Adobe\Reader 9.3\Setup Files\Reader9\Setup.exe (444160 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Adobe\Reader 9.3\Setup Files\Setup.exe (408872 bytes)
C:\Windows\USR_Shohdi_Photo_USR.exe (6889074 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\scs2FD6.tmp (335 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\scs31EA.tmp (269 bytes)
Restore the original content of the HOSTS file (%System%\drivers\etc\hosts): 127.0.0.1 localhost
Reboot the computer.

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

Static Analysis

VersionInfo

No information is available.

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
	4096	16384	6656	5.29942	ed41050c46cf2dea26cf5a8d78627828
.rsrc	20480	102400	102400	2.95762	fb08e890b5ddd1678bfada5f25593fe2
petite	122880	379	512	2.83683	d9152af36e3787ad41768ba5d11906da

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

%original file name%.exe_4008:

`.rsrc

D$(PSSh

ccRegVfy.exe

ccApp.exe

IEXPLORE.EXE

windows

\*.exe

.text

.data

.rsrc

msvcrt.dll

KERNEL32.dll

nddeapir.pdb

_acmdln

m.Zw%

ADVAPI32.DLL

\USERINIT.EXE

%s:*:enabled:@shell32.dll,-1

SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer

Qoysys.zief.pl

core.ircgalaxy.pl

NICK avabcadz

SFC.DLL

SFC_OS.DLL

USER32.DLL

SHLWAPI.DLL

WSOCK32.DLL

WININET.DLL

%.6x . . :%c%.8x%x %s

JOIN

127.0.0.1 jL.chura.pl

#

KERNEL32.DLL

windowsupdate

drweb

user32.dll

kernel32.dll

MSVCIRT.dll

MSVCRT.dll

5.1.2600.0 (xpclient.010817-1148)

NDDEAPIR.EXE

Windows

Operating System

5.1.2600.0

%original file name%.exe_4008_rwx_00401000_00002000: