Submission Summary:

What's been foundSeverity Level
Downloads/requests other files from Internet.
Modifies some system settings that may have negative impact on overall system security state.
Creates a startup registry entry.
Contains characteristics of an identified security risk.

 

Technical Details:

 

Possible Security Risk

Security RiskDescription
Email-Worm.Brontok.Q Email.Worm.Brontok.Q is an email worm that propagates by sending itself to email contacts harvested from an infected machine. This worm employs several anti-removal tactics that will cause a system reboot when triggered.

Threat CategoryDescription
A network-aware worm that attempts to replicate across the existing network(s)

 

File System Modifications

#Filename(s)File SizeFile HashAlias
1 %AppData%\csrss.exe
%AppData%\inetinfo.exe
%AppData%\lsass.exe
%AppData%\services.exe
%AppData%\smss.exe
%AppData%\winlogon.exe
%Programs%\Startup\Empty.pif
%Templates%\Brengkolang.com
%Windir%\eksplorasi.exe
%Windir%\ShellNew\sempalong.exe
[file and pathname of the sample #1]
%System%\%UserName%'s Setting.scr
260,096 bytes MD5: 0xB1BF7B9D81663197231C6793F09994D2
SHA-1: 0x11E0BBA71EE787BD7847EC6BF0B615717D51A021
W32.Rontokbro@mm [Symantec]
Email-Worm.Win32.Brontok.q [Kaspersky Lab]
W32/Rontokbro.gen@MM [McAfee]
WORM_RONTKBR.GEN [Trend Micro]
W32/Brontok-D [Sophos]
Worm:Win32/Brontok@mm [Microsoft]
Email-Worm.Win32.Brontok [Ikarus]
Win32/Brontok.worm.42644 [AhnLab]
2 %Windir%\Tasks\At1.job 406 bytes MD5: 0x0468B613F163AFED7C18CCB5FB81F398
SHA-1: 0xD1ED18F067E469DDE82D8C5554235D214F108BD2
(not available)

 

Memory Modifications

Process NameProcess FilenameMain Module Size
winlogon.exe%AppData%\winlogon.exe253,952 bytes
services.exe%AppData%\services.exe253,952 bytes
lsass.exe%AppData%\lsass.exe253,952 bytes
csrss.exe%AppData%\csrss.exe253,952 bytes
inetinfo.exe%AppData%\inetinfo.exe253,952 bytes
[filename of the sample #1][file and pathname of the sample #1]253,952 bytes
smss.exe%AppData%\smss.exe253,952 bytes

 

Registry Modifications

 

Other details

 

 

All content ("Information") contained in this report is the copyrighted work of Threat Expert Ltd and its associated companies ("ThreatExpert") and may not be copied without the express permission of ThreatExpert.

The Information is provided on an "as is" basis. ThreatExpert disclaims all warranties, whether express or implied, to the maximum extent permitted by law, including the implied warranties that the Information is merchantable, of satisfactory quality, accurate, fit for a particular purpose or need, or non-infringing, unless such implied warranties are legally incapable of exclusion. Further, ThreatExpert does not warrant or make any representations regarding the use or the results of the use of the Information in terms of their correctness, accuracy, reliability, or otherwise.

Copyright © 2018 ThreatExpert. All rights reserved.