WORM_HAMWEQ.NBD
VirTool:Win32/VBInject.gen!BW(Microsoft), Win32/AutoRun.KS worm(Eset)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Worm
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware, Propagates via flashdrives
This worm arrives by connecting affected removable drives to a system. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
It executes commands from a remote malicious user, effectively compromising the affected system.
It performs denial of service (DoS) attacks on affected systems using specific flooding method(s).
TECHNICAL DETAILS
90,112 bytes
EXE
Yes
31 Oct 2013
Connects to URLs/IPs, Compromises system security
Arrival Details
This worm arrives by connecting affected removable drives to a system.
It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This worm drops the following files:
- {Drive Letter}:\Feast\Ival\desktOp.Ini
- %System Root%\Feast\Ival\desktOp.Ini
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It drops the following copies of itself into the affected system:
- %System Root%\Feast\Ival\Feast.exe
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It creates the following folders:
- %System Root%\Feast
- %System Root%\Feast\Ival
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- Feast_v_1
It injects itself into the following processes as part of its memory residency routine:
- explorer.exe
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{random}
StubPath = "%System Root%\Feast\Ival\Feast.exe"
Other System Modifications
This worm adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{random}
Propagation
This worm creates the following folders in all removable drives:
- {Drive Letter}:\Feast
- {Drive Letter}:\Feast\Ival
It drops the following copy(ies) of itself in all removable drives:
- {Drive Letter}:\Feast\Ival\Feast.exe
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
The said .INF file contains the following strings:
[autorun]
open=Feast\Ival\Feast.exe
;wenta mal ahlak yabnel mekaka lol ma2sodaksh enta ya zaky yalla kol sana wenta tayebjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj.
action=Open folder to view files
shell\open=Open
shell\open\command=Feast\Ival\Feast.exe
shell\open\default=1
Backdoor Routine
This worm connects to any of the following IRC server(s):
- {BLOCKED}t.{BLOCKED}rk.biz
- {BLOCKED}t.{BLOCKED}ils.net
- {BLOCKED}t.{BLOCKED}c.cz
It executes the following commands from a remote malicious user:
- Download and execute files
- Perform flooding attacks
Denial of Service (DoS) Attack
This worm performs denial of service (DoS) attacks on affected systems using the following flooding method(s):
- UDP Flood
- SYN Flood
Other Details
This worm uses the following credentials when accessing its IRC server:
- PASS Virus
- NICK VirUs-jxilocow
- USER VirUs "" "efo" : 2,1 4IaM 7MAD 7SO FUCK OFF
- JOIN #Feast# Virus
NOTES:
This worm sends message to its server once successfully propagate through removable drives with the following format:
- PRIVMSG #Feast.usb# :0,1 ViroOo Own3d 0USB Driver 4 {Drive Letter}
It does not have rootkit capabilities.
It does not exploit any vulnerability.
SOLUTION
9.300
10.392.08
06 Nov 2013
10.393.00
06 Nov 2013
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Restart in Safe Mode
Step 3
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components
- {random}
- {random}
Step 4
Search and delete these folders
- %System Root%\Feast
- {Drive Letter}:\Feast
Step 5
Search and delete AUTORUN.INF files created by WORM_HAMWEQ.NBD that contain these strings
open=Feast\Ival\Feast.exe
;wenta mal ahlak yabnel mekaka lol ma2sodaksh enta ya zaky yalla kol sana wenta tayebjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj.
action=Open folder to view files
shell\open=Open
shell\open\command=Feast\Ival\Feast.exe
shell\open\default=1
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_HAMWEQ.NBD. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
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