Submission Summary:

What's been foundSeverity Level
A network-aware worm that uses known exploit(s) in order to replicate across vulnerable networks.
MS04-012: DCOM RPC Overflow exploit - replication across TCP 135/139/445/593 (common for Blaster, Welchia, Spybot, Randex, other IRC Bots).
MS04-011: LSASS Overflow exploit - replication across TCP 445 (common for Sasser, Bobax, Kibuv, Korgo, Gaobot, Spybot, Randex, other IRC Bots).
Capability to perform DoS attacks against other computers.
Capability to terminate Antivirus, Firewall and other security related processes.
Replication across networks by exploiting weekly restricted shares (common for Randex family of worms).
Communication with a remote IRC server.
Creates a startup registry entry.
Contains characteristics of an identified security risk.

 

Technical Details:

 

Possible Security Risk

Threat CategoryDescription
A network-aware worm that attempts to replicate across the existing network(s)
A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment

 

File System Modifications

#Filename(s)File SizeFile HashAlias
1 %System%\arhkstnhsc.exe 115,712 bytes MD5: 0xA6169CD22AC60CE0AD4E83739A27CBB1 Packed/FSG [PCTools]
W32.Spybot.Worm [Symantec]
WORM_RBOT.GJJ [Trend Micro]

 

Memory Modifications

Process NameProcess FilenameMain Module Size
arhkstnhsc.exe%System%\arhkstnhsc.exe1,282,048 bytes
[filename of the sample #1][file and pathname of the sample #1]1,282,048 bytes

 

Registry Modifications

 

Other details

Remote HostPort Number
cfgnzm.aswend.com7000

 

Outbound traffic (potentially malicious)

 

Heuristics Analysis

 

 

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 © 2014 ThreatExpert. All rights reserved.