Trojan.PWS.Sinowal.NCX_5b29acf9e6

by malwarelabrobot on June 16th, 2016 in Malware Descriptions.

Susp_Dropper (Kaspersky), Trojan.PWS.Sinowal.NCX (B) (Emsisoft), Trojan.PWS.Sinowal.NCX (AdAware), Backdoor.Win32.PcClient.FD, Sinowal.YR (Lavasoft MAS)
Behaviour: Trojan, Backdoor


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

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Summary
Dynamic Analysis
Static Analysis
Network Activity
Map
Strings from Dumps
Removals

MD5: 5b29acf9e68ab3b642466158adf418e3
SHA1: c935ade1d4227462eae3933f861c82439420fc6d
SHA256: ef27204c2b84ad0e6d0d039280dea36afc0a834748b1837ec0e1d81cc0cba6ea
SSDeep: 12288:evwckc2x3Vtg5eeFXJHES5yUwNjo2fBtb0op/z: V 3TgFHES5yUwNjoKtb
Size: 999424 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2005-06-03 03:07:18
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).

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:1988

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

rundll32.exe:1392

Mutexes

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

File activity

The process %original file name%.exe:1988 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\1.tmp (3802 bytes)
%Documents and Settings%\%current user%\Start Menu\Programs\Startup\scandisk.lnk (685 bytes)

The process rundll32.exe:1392 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Start Menu\Programs\Startup\scandisk.lnk (1370 bytes)
%System%\tloadmA2.dll (3802 bytes)
%Documents and Settings%\%current user%\tloadmA2.dll (3802 bytes)

Registry activity

The process %original file name%.exe:1988 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

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

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

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

[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"
"Startup" = "%Documents and Settings%\%current user%\Start Menu\Programs\Startup"

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

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3]
"1400" = "0"

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

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

"Start Menu" = "%Documents and Settings%\%current user%\Start Menu"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"CommonVideo" = "%Documents and Settings%\All Users\Documents\My Videos"
"CommonPictures" = "%Documents and Settings%\All Users\Documents\My Pictures"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "BB 8D 80 37 8B 6F 87 E2 57 CB A7 19 79 8D A0 10"

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

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

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%System%]
"reg.exe" = "Registry Console Tool"

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

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"

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]
"NvCplDaemonTool" = "rundll32.exe %System%\tloadmA2.dll,_IWMPEvents"

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 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:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"NvCplDaemonTool" = "rundll32.exe C:\DOCUME~1\"%CurrentUserName%"\tloadmA2.dll,_IWMPEvents"

The process rundll32.exe:1392 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "78 B4 EA 70 AB 1C 68 A6 D8 CD C2 70 CF A4 14 9C"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Startup" = "%Documents and Settings%\%current user%\Start Menu\Programs\Startup"

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

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

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

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

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

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

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

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

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

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3]
"1400" = "0"

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

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

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

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]
"NvCplDaemonTool" = "rundll32.exe %System%\tloadmA2.dll,_IWMPEvents"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"NvCplDaemonTool" = "rundll32.exe C:\DOCUME~1\"%CurrentUserName%"\tloadmA2.dll,_IWMPEvents"

Dropped PE files

MD5 File path
de0ec9a8891de7609adfe77e399fe57d c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\1.tmp
de0ec9a8891de7609adfe77e399fe57d c:\Documents and Settings\"%CurrentUserName%"\Start Menu\Programs\Startup\scancdiskv48.dll
de0ec9a8891de7609adfe77e399fe57d c:\Documents and Settings\"%CurrentUserName%"\tloadmA2.dll
de0ec9a8891de7609adfe77e399fe57d c:\WINDOWS\system32\tloadmA2.dll

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

VersionInfo

Company Name: Microsoft Corporation
Product Name: Microsoft Multimedia Controls
Product Version: 6.03.01.0146
Legal Copyright: Copyright (c) Microsoft Corp. 1997-1999
Legal Trademarks:
Original Filename:
Internal Name:
File Version: 6.03.01.0146
File Description: Microsoft Multimedia Controls Utilities
Comments:
Language: English (United States)

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 14744 16384 4.09011 3526c24b57b6f35d04c89a0b9e9543fe
.data 20480 958804 962560 4.91019 dfff4301c0f24da8f50ebb434c86a7f7
.data1 983040 1 4096 0.002275 1e80597e0cdc0cd088dbae224f814eea
.data2 987136 1 4096 0.002275 000dc554a56119ad12d5c983df491cfc
.rsrc 991232 840 4096 0.624802 bcf8a50d29ffe32f1abd3e04ee30cfcf
.reloc 995328 1764 4096 0.482917 a1c01130251ad6f4963199805b7f7ba3

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

URL IP
hxxp://google.com/ 173.194.113.192


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET / HTTP/1.0
Host: google.com
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0)
Connection: close


HTTP/1.0 302 Found
Cache-Control: private
Content-Type: text/html; charset=UTF-8
Location: hXXp://VVV.google.com.ua/?gfe_rd=cr&ei=M5hgV4-BCPCEygWFqrqoCw
Content-Length: 262
Date: Tue, 14 Jun 2016 23:50:11 GMT
<HTML><HEAD><meta http-equiv="content-type" content="te
xt/html;charset=utf-8">.<TITLE>302 Moved</TITLE></HE
AD><BODY>.<H1>302 Moved</H1>.The document has mov
ed.<A HREF="hXXp://VVV.google.com.ua/?gfe_rd=cr&ei=M5hgV4-BCPCE
ygWFqrqoCw">here</A>...</BODY></HTML>....


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

rundll32.exe_1392:

.text
`.data
.rsrc
msvcrt.dll
KERNEL32.dll
NTDLL.DLL
GDI32.dll
USER32.dll
IMAGEHLP.dll
rundll32.pdb
.....eZXnnnnnnnnnnnn3
....eDXnnnnnnnnnnnn3
...eDXnnnnnnnnnnnn,
.eDXnnnnnnnnnnnn,
%Xnnnnnnnnnnnnnnn1
O3$dS7"%U9
.manifest
5.1.2600.5512 (xpsp.080413-2105)
RUNDLL.EXE
Windows
Operating System
5.1.2600.5512
YThere is not enough memory to run the file %s.
Please close other windows and try again.
9The file %s or one of its components could not be opened.
0The file %s or one of its components cannot run.
MThe file %s or one of its components requires a different version of Windows.
UThe file %s or one of its components cannot run in standard or enhanced mode Windows.3Another instance of the file %s is already running./An exception occurred while trying to run "%s"
Error in %s
Missing entry:%s
Error loading %s


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:1988

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

    %Documents and Settings%\%current user%\Local Settings\Temp\1.tmp (3802 bytes)
    %Documents and Settings%\%current user%\Start Menu\Programs\Startup\scandisk.lnk (685 bytes)
    %System%\tloadmA2.dll (3802 bytes)
    %Documents and Settings%\%current user%\tloadmA2.dll (3802 bytes)

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

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "NvCplDaemonTool" = "rundll32.exe %System%\tloadmA2.dll,_IWMPEvents"

    [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
    "NvCplDaemonTool" = "rundll32.exe C:\DOCUME~1\"%CurrentUserName%"\tloadmA2.dll,_IWMPEvents"

  5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
  6. Reboot the computer.

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

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