Gen.Variant.Barys.290_8153f61785

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

explorer.exe.ex:1552
%original file name%.exe:964

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

rundll32.exe:552

File activity

The process %original file name%.exe:964 makes changes in the file system.

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

%Documents and Settings%\%current user%\Application Data\161 KB\sexe.jpg\12.12.12.12\explorer.exe.exe (16 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\sexe.jpg (165 bytes)

Registry activity

The process explorer.exe.ex:1552 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "08 14 58 4E 1A A6 AA 4A 96 97 49 8E 5A 12 E9 C0"

The process rundll32.exe:552 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "85 50 D8 8D 6C 30 14 94 89 83 C6 E7 6E E9 22 CA"

[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\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

The process %original file name%.exe:964 makes changes in the system registry.

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

[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\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%System%]
"shimgvw.dll" = "Windows Picture and Fax Viewer"

Dropped PE files

MD5	File path
83fc1174661b795eae9e1accfae98073	c:\Documents and Settings\"%CurrentUserName%"\Application Data\161 KB\sexe.jpg\12.12.12.12\explorer.exe.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

Removals

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):

   explorer.exe.ex:1552
   %original file name%.exe:964

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

   %Documents and Settings%\%current user%\Application Data\161 KB\sexe.jpg\12.12.12.12\explorer.exe.exe (16 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\sexe.jpg (165 bytes)

4. Reboot the computer.
   

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

Static Analysis

VersionInfo

Company Name: 161 KB
Product Name: sexe.jpg
Product Version: 12.12.12.12
Legal Copyright: sexe.jpg
Legal Trademarks: sexe.jpg
Original Filename: server2nojpg.exe
Internal Name: server2nojpg.exe
File Version: 12.12.12.12
File Description: JPEG image
Comments: JPEG image
Language: English (United States)

Company Name: 161 KBProduct Name: sexe.jpgProduct Version: 12.12.12.12Legal Copyright: sexe.jpgLegal Trademarks: sexe.jpgOriginal Filename: server2nojpg.exeInternal Name: server2nojpg.exeFile Version: 12.12.12.12File Description: JPEG imageComments: JPEG imageLanguage: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	8192	810676	811008	4.54183	494a63080db798c0aec3c8c8bca2f55d
.rsrc	819200	101432	101888	5.51695	eecca34c1da65fabd28f2e658c2faa6c
.reloc	925696	12	512	0.067931	9c41ee6f0a97c8b53a04c88b8f2ac18c

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

rundll32.exe_552:

.text

.text

`.data

`.data

.rsrc

.rsrc

msvcrt.dll

msvcrt.dll

KERNEL32.dll

KERNEL32.dll

NTDLL.DLL

NTDLL.DLL

GDI32.dll

GDI32.dll

USER32.dll

USER32.dll

IMAGEHLP.dll

IMAGEHLP.dll

rundll32.pdb

rundll32.pdb

.....eZXnnnnnnnnnnnn3

.....eZXnnnnnnnnnnnn3

....eDXnnnnnnnnnnnn3

....eDXnnnnnnnnnnnn3

...eDXnnnnnnnnnnnn,

...eDXnnnnnnnnnnnn,

.eDXnnnnnnnnnnnn,

.eDXnnnnnnnnnnnn,

%Xnnnnnnnnnnnnnnn1

%Xnnnnnnnnnnnnnnn1

O3$dS7"%U9

O3$dS7"%U9

.manifest

.manifest

5.1.2600.5512 (xpsp.080413-2105)

5.1.2600.5512 (xpsp.080413-2105)

RUNDLL.EXE

RUNDLL.EXE

Windows

Windows

Operating System

Operating System

5.1.2600.5512

5.1.2600.5512

YThere is not enough memory to run the file %s.

YThere is not enough memory to run the file %s.

Please close other windows and try again.

Please close other windows and try again.

9The file %s or one of its components could not be opened.

9The file %s or one of its components could not be opened.

0The file %s or one of its components cannot run.

0The file %s or one of its components cannot run.

MThe file %s or one of its components requires a different version of Windows.

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"

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

Error in %s

Missing entry:%s

Missing entry:%s

Error loading %s

Error loading %s