ThreatExpert Report: W32.Ramnit!inf, Virus.Win32.Nimnul.a, W32/Ramnit.a, W32/Patched-I..

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Submission Summary:

Submission details:

Submission received: 15 June 2017, 04:28:16
Processing time: 5 min 57 sec
Submitted sample:

File MD5: 0x6D3B810632D77EAF0863E4AC303BB47E
File SHA-1: 0x83C966D34DC046F52220379AC0F3546DE8E490BD
Filesize: 180,224 bytes
Alias:

W32.Ramnit!inf [Symantec]
Virus.Win32.Nimnul.a [Kaspersky Lab]
W32/Ramnit.a [McAfee]
W32/Patched-I [Sophos]
Virus:Win32/Ramnit.A [Microsoft]
Win32.SuspectCrc [Ikarus]
Win32/Ramnit.B [AhnLab]

Summary of the findings:

What's been found	Severity Level
Capability to block security-related software by modifying firewall settings and by disabling security services, such as Windows Update, Norton Autoprotect, Kaspersky Anti-Virus, etc.
Produces outbound traffic.
There were some system executable files modified, which might indicate the presence of a PE-file infector.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! The following threat category was identified:

Threat Category	Description
	A virus capable to modify other files by infecting, prepending, or overwriting them them with its own body

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%System%\nannaa.exe [file and pathname of the sample #1]	180,224 bytes	MD5: 0x6D3B810632D77EAF0863E4AC303BB47E SHA-1: 0x83C966D34DC046F52220379AC0F3546DE8E490BD	W32.Ramnit!inf [Symantec] Virus.Win32.Nimnul.a [Kaspersky Lab] W32/Ramnit.a [McAfee] W32/Patched-I [Sophos] Virus:Win32/Ramnit.A [Microsoft] Win32.SuspectCrc [Ikarus] Win32/Ramnit.B [AhnLab]
2	%System%\nannaaSrv.exe [part of the sample filename]1Srv.exe	85,713 bytes	MD5: 0xC5C99988728C550282AE76270B649EA1 SHA-1: 0x113E8FF0910F393A41D5E63D43EC3653984C63D6	W32.Virut.CF [Symantec] Packed.Win32.Krap.hm [Kaspersky Lab] PWS-Zbot.gen.pq [McAfee] Mal/Agent-IE [Sophos] Virus.Win32.Virut [Ikarus]

Note:

%System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

The following files were modified:

[pathname with a string SHARE]\msinfo32.exe
[pathname with a string SHARE]\sapisvr.exe
%ProgramFiles%\Internet Explorer\Connection Wizard\icwconn1.exe
%ProgramFiles%\Internet Explorer\Connection Wizard\icwconn2.exe
%ProgramFiles%\Internet Explorer\Connection Wizard\icwrmind.exe
%ProgramFiles%\Internet Explorer\Connection Wizard\icwtutor.exe
%ProgramFiles%\Internet Explorer\Connection Wizard\inetwiz.exe
%ProgramFiles%\Internet Explorer\Connection Wizard\isignup.exe
%ProgramFiles%\Internet Explorer\iedw.exe
%ProgramFiles%\Internet Explorer\IEXPLORE.EXE
%ProgramFiles%\MSN\MSNIA\msniasvc.exe
%ProgramFiles%\MSN\MSNIA\prestp.exe
%ProgramFiles%\MSN\MsnInstaller\msninst.exe
%ProgramFiles%\NetMeeting\cb32.exe
%ProgramFiles%\NetMeeting\conf.exe
%ProgramFiles%\NetMeeting\wb32.exe
%ProgramFiles%\Outlook Express\msimn.exe
%ProgramFiles%\Outlook Express\oemig50.exe
%ProgramFiles%\Outlook Express\setup50.exe
%ProgramFiles%\Outlook Express\wab.exe
%ProgramFiles%\Outlook Express\wabmig.exe
%ProgramFiles%\Web Publish\WPWIZ.EXE
%ProgramFiles%\Windows Media Player\migrate.exe
%ProgramFiles%\Windows Media Player\mplayer2.exe
%ProgramFiles%\Windows Media Player\setup_wm.exe
%ProgramFiles%\Windows Media Player\wmplayer.exe
%ProgramFiles%\Windows NT\Accessories\wordpad.exe
%ProgramFiles%\Windows NT\dialer.exe
%ProgramFiles%\Windows NT\hypertrm.exe
%ProgramFiles%\Windows NT\Pinball\PINBALL.EXE
%Windir%\Cache\Adobe Reader 6.0.1\ENUBIG\setup.exe
%Windir%\hh.exe
%Windir%\inf\unregmp2.exe
%Windir%\Installer\{350C97B0-3D7C-4EE8-BAA9-00BCB3D54227}\places.exe
%Windir%\Microsoft.NET\Framework\NETFXSBS10.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\aspnet_compiler.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\aspnet_regbrowsers.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\aspnet_regsql.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\CasPol.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\dfsvc.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\IEExec.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\jsc.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
%Windir%\msagent\agentsvr.exe
%Windir%\mui\muisetup.exe
%Windir%\NOTEPAD.EXE
%Windir%\pchealth\helpctr\binaries\HelpCtr.exe
%Windir%\pchealth\helpctr\binaries\HelpHost.exe
%Windir%\pchealth\helpctr\binaries\HelpSvc.exe
%Windir%\pchealth\helpctr\binaries\HscUpd.exe
%Windir%\pchealth\helpctr\binaries\msconfig.exe
%Windir%\pchealth\helpctr\binaries\notiflag.exe
%Windir%\pchealth\UploadLB\Binaries\UploadM.exe
%Windir%\regedit.exe
%System%\accwiz.exe
%System%\actmovie.exe
%System%\ahui.exe
%System%\arp.exe
%System%\asr_fmt.exe
%System%\asr_ldm.exe
%System%\asr_pfu.exe
%System%\at.exe
%System%\atmadm.exe
%System%\attrib.exe
%System%\auditusr.exe
%System%\blastcln.exe
%System%\bootcfg.exe
%System%\bootok.exe
%System%\bootvrfy.exe
%System%\cacls.exe
%System%\calc.exe
%System%\charmap.exe
%System%\chkdsk.exe
%System%\chkntfs.exe
%System%\cidaemon.exe
%System%\cipher.exe
%System%\cisvc.exe
%System%\ckcnv.exe
%System%\cleanmgr.exe
%System%\clean_all.exe
%System%\cliconfg.exe
%System%\clipbrd.exe
%System%\clipsrv.exe
%System%\cmd.exe
%System%\cmdl32.exe
%System%\cmmon32.exe
%System%\cmstp.exe
%System%\Com\comrepl.exe
%System%\Com\comrereg.exe
%System%\comp.exe
%System%\compact.exe
%System%\conime.exe
%System%\control.exe
%System%\convert.exe
%System%\cscript.exe
%System%\ctfmon.exe
%System%\dcomcnfg.exe

Notes:

%ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.
%Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

The following directories were created:

c:\System Volume Information\.
c:\System Volume Information\..

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
nannaa.exe	%System%\nannaa.exe	188,416 bytes
nannaaSrv.exe	%System%\nannaaSrv.exe	77,824 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	188,416 bytes

There was a new service created in the system:

Service Name	Display Name	Status	Service Filename
WinHelp32	Windows Help System	"Running"	%System%\nannaa.exe

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_WINHELP32
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_WINHELP32\0000
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_WINHELP32\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinHelp32
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinHelp32\Security
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinHelp32\Enum
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINHELP32
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINHELP32\0000
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINHELP32\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinHelp32
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinHelp32\Security
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinHelp32\Enum

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_WINHELP32\0000\Control]

*NewlyCreated* = 0x00000000
ActiveService = "WinHelp32"

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_WINHELP32\0000]

Service = "WinHelp32"
Legacy = 0x00000001
ConfigFlags = 0x00000000
Class = "LegacyDriver"
ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
DeviceDesc = "Windows Help System"

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_WINHELP32]

NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinHelp32\Enum]

0 = "Root\LEGACY_WINHELP32\0000"
Count = 0x00000001
NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinHelp32\Security]

Security = 01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 00 04 00 00 00 00 00 14 00 FD 01 02 00 01 01 00 00 00 00 00 05 12 00 00 00 00 00 18 00 FF 01 0F 0

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinHelp32]

Type = 0x00000010
Start = 0x00000002
ErrorControl = 0x00000000
ImagePath = "%System%\nannaa.exe"
DisplayName = "Windows Help System"
ObjectName = "LocalSystem"
Description = "Windows Help System for X32 windows desktop"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINHELP32\0000\Control]

*NewlyCreated* = 0x00000000
ActiveService = "WinHelp32"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINHELP32\0000]

Service = "WinHelp32"
Legacy = 0x00000001
ConfigFlags = 0x00000000
Class = "LegacyDriver"
ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
DeviceDesc = "Windows Help System"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINHELP32]

NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinHelp32\Enum]

0 = "Root\LEGACY_WINHELP32\0000"
Count = 0x00000001
NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinHelp32\Security]

Security = 01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 00 04 00 00 00 00 00 14 00 FD 01 02 00 01 01 00 00 00 00 00 05 12 00 00 00 00 00 18 00 FF 01 0F 0

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinHelp32]

Type = 0x00000010
Start = 0x00000002
ErrorControl = 0x00000000
ImagePath = "%System%\nannaa.exe"
DisplayName = "Windows Help System"
ObjectName = "LocalSystem"
Description = "Windows Help System for X32 windows desktop"

The following Registry Values were modified:

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\ServiceCurrent]

(Default) =

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ServiceCurrent]

(Default) =

Other details

Analysis of the file resources indicate the following possible countries of origin:

	China
	Russian Federation

To mark the presence in the system, the following Mutex objects were created:

KyUffThOkYwRRtgPP
WinHelp32

The following port was open in the system:

Port	Protocol	Process
1035	TCP	nannaa.exe (%System%\nannaa.exe)

The following Host Names were requested from a host database:

157.52.160.68
ilo.brenz.pl
exevlw.com
ejpsun.com
bgxoom.com
xvgmal.com
vhuydo.com
yracnr.com
yetpar.com
yawopg.com
iozqml.com
shhugt.com
bfazxu.com
ant.trenz.pl
xbodab.com
dkcyeg.com
ypmpie.com
etngio.com
aysziu.com
irbueh.com
bisaao.com
gbpnpw.com
cwijov.com
ssrabe.com
dkfolt.com
eezvam.com
oyqgiz.com
rofmlj.com
fcebaq.com
fvyezo.com
puayjc.com
vowdom.com
cscuad.com
poidcg.com
xwlglu.com
eiwsmu.com
onslrb.com
dhpxto.com
diasou.com
vsstui.com
qpexiy.com
fotlce.com
khuofe.com
euyenc.com
osvkuh.com
sazfic.com
gtmugz.com
ymqagh.com
yvfyih.com
rataex.com
bnvebf.com
eafgyk.com
uwmdoi.com
krqaqy.com
emddcw.com
ewervk.com
edtffx.com
cwuluh.com
pmejur.com
gwotxr.com
argsly.com
maxagw.com
gbauwe.com
pwukqb.com
ojfbgp.com
pptijm.com
aifnop.com
uevyha.com
kflzyv.com
pagdan.com
sgimey.com
kmuaeb.com
pmfina.com
mlwhbv.com
tyfqrz.com
oalsvf.com
miopzu.com
sweiuh.com
psmagw.com
egiqxi.com
excqaa.com
tfpoxz.com
gxkowk.com
ccumpe.com
gstlmx.com
zxcawz.com
ucisyy.com
oyvzbu.com
ycjscm.com
ghqrqg.com
optryf.com
chfoon.com
uoyhhd.com
nbzudn.com
eiioci.com
kivzey.com
eyuuwy.com
ygizyg.com
awejdf.com
tyxxoy.com

There were registered attempts to establish connection with the remote hosts. The connection details are:

Remote Host	Port Number
157.52.160.68	8000
exevlw.com	443
83.133.119.197	80

Outbound traffic (potentially malicious)

There was an outbound traffic produced on port 8000:

00000000 | 0200 0000 5769 6E64 6F77 7320 5850 0000 | ....Windows XP..
00000010 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000020 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000030 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000040 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000050 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000060 | 0000 0000 0000 0000 0100 0000 0000 0000 | ................
00000070 | B70B 0000 0000 0000 0028 2400 A4FC A200 | .........($.....
00000080 | 00B0 FD7F A4FC A200 948E 917C 54FC A200 | ...........|T...
00000090 | 878F 917C 00B0 FD7F 00E0 FD7F 0000 0000 | ...|............
000000A0 | 1400 0000 0100 0000 0000 0000 0000 0000 | ................
000000B0 | 1000 0000 0000 0000 0000 0000 0000 0000 | ................
000000C0 | 0000 0000 0000 0000 0000 0000 00E0 FD7F | ................
000000D0 | C120 4F77 A41E 2400 48FC A200 0000 0000 | . Ow..$.H.......
000000E0 | 0CFD A200 18EE 907C D08E 917C FFFF FFFF | .......|...|....
000000F0 | 748E 917C C4E8 907C FA8D 917C 30FD A200 | t..|...|...|0...
00000100 | 18EE 907C 0000 0000 0000 0000 0000 0000 | ...|............
00000110 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000120 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000130 | 0000 0000 0000 0000 00B0 FD7F 0000 0000 | ................
00000140 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000150 | B0FC A200 0000 0000 FFFF FFFF 18EE 907C | ...............|
00000160 | 008E 917C FFFF FFFF FA8D 917C 25D6 907C | ...|.......|%..|
00000170 | CFEA 907C 30FD A200 0100 0000 1700 0100 | ...|0...........
00000180 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000190 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
000001A0 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
000001B0 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
000001C0 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
000001D0 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
000001E0 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
000001F0 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000200 | 0000 0000 0000 0000 0000 0000 3800 0000 | ............8...
00000210 | 2300 0000 2300 0000 E0FC 9200 18EE 907C | #...#..........|
00000220 | 0000 0000 FFFF FFFF 3207 917C 7023 4000 | ........2..|p#@.
00000230 | EB06 917C 5608 817C 1B00 0000 0002 0000 | ...|V..|........
00000240 | FCFF A200 2300 0000 0000 0000 0000 0000 | ....#...........
00000250 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000260 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000270 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000280 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000290 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
000002A0 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
000002B0 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
000002C0 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
000002D0 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
000002E0 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
000002F0 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000300 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000310 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000320 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000330 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000340 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000350 | 0000 0000 0000 0000 0000 0000 0000 0000 | ................
00000360 | BC61 6781 248C 93F7 D99A 4F80 E19A 4F80 | .ag.$.....O...O.
00000370 | 8C61 6781 2060 6781 5460 6781 0000 0000 | .ag. `g.T`g.....
00000380 | 8683 6380 8822 6581 2060 6781 00B0 FD7F | ..c.."e. `g.....
00000390 | 848C 93F7 2C01 5080 0000 0000 0500 0000 | ....,.P.........
000003A0 | 0000 0000 0000 0000 0000 0000 30D0 4F80 | ............0.O.
000003B0 | 0000 0000 0000 0000 ECD0 4F80 E202 6D80 | ..........O...m.
000003C0 | 2060 6781 508D 93F7 0000 0000 0000 0000 |  `g.P...........
000003D0 | 0100 0000 0000 0000 8822 6581 DEFC 4F80 | ........."e...O.
000003E0 | 0000 0000 0000 0000 0000 0000 1401 5080 | ..............P.
000003F0 | 9C8C 93F7 350C 6D80 0000 0000 B0FF A200 | ....5.m.........
00000400 | 7A23 4000                               | z#@.

There was an outbound traffic produced on port 443:

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