HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.Win32.Encpk.pa (v) (VIPRE), Trojan-Dropper.Win32.Fignotok!IK (Emsisoft), Worm.Win32.Dorkbot.FD, WormDorkbot.YR, GenericUDPFlooder.YR, GenericIRCBot.YR, GenericMSNWorm.YR, GenericUSBInfector.YR, GenericDNSBlocker.YR, GenericAutorunWorm.YR, GenericSYNFlooder.YR, GenericInjector.YR, BankerGeneric.YR, GenericProxy.YR, GenericPhysicalDrive0.YR (Lavasoft MAS)Behaviour: Trojan-Dropper, Banker, Trojan, Flooder, Worm, WormAutorun, IRCBot, MSNWorm, DNSBlocker, UDPFlooder, SYNFlooder, Trojan-Proxy, USBInfector
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: 266b3e31bbfc9ea53c3261518806c4f1
SHA1: db21f8443cfe42255c4aaf51dd3b33b436f1187b
SHA256: 2cd4b9c541daea8d8bcbdaf4fb1eb2ec5a44b8118a2787299118826a49a5ef6f
SSDeep: 3072:JVa7/WQykKNGnYlQerlcowUXKNCo56QIEDdbERYY9ElRMQTjnYbQbdmV0:QfykKv5YUKTDI2dE9wRMQTLYbkmV
Size: 204800 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: Armadillov171, MicrosoftVisualC, MicrosoftVisualCv50v60MFC, MicrosoftVisualC50, UPolyXv05_v6
Company: no certificate found
Created at: 2011-09-02 17:14:07
Summary: Worm. A program that is primarily replicating on networks or removable drives.
Dynamic Analysis
Payload
Behaviour | Description |
---|---|
WormAutorun | A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Worm's file once a user opens a drive's folder in Windows Explorer. |
IRCBot | A bot can communicate with command and control servers via IRC channel. |
MSNWorm | A worm can spread its copies through the MSN Messanger. |
DNSBlocker | A program can block designated DNS servers for making it difficult for users to locate specific domains or web sites on the Internet. |
UDPFlooder | This program can make a UDP flood. A UDP flood attack is a denial-of-service attack using the User Datagram Protocol (UDP). It can be initiated by sending a large number of UDP packets to random ports on a remote host. |
SYNFlooder | This program can make a SYN flood. It is a form of denial-of-service attack in which an attacker sends a succession of SYN requests to a target's system in an attempt to consume enough server resources to make the system unresponsive to legitimate traffic. |
Trojan-Proxy | This program can launch a proxy server (SOCKS4) on a designated TCP port. |
USBInfector | A program can register a device notification with the help of RegisterDeviceNotification. So it is notified when a USB device is plugged and then the worm copies itself to the USB device plugged into the affected computer. |
Process activity
The Worm creates the following process(es):
Gpwiwo.exe:2640
Gpwiwo.exe:1268
%original file name%.exe:2388
%original file name%.exe:2492
The Worm injects its code into the following process(es):
ctfmon.exe:252
File activity
The process %original file name%.exe:2492 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Application Data\Gpwiwo.exe (1281 bytes)
Registry activity
The process ctfmon.exe:252 makes changes in the system registry.
The Worm deletes the following value(s) in system registry:
The Worm disables automatic startup of the application by deleting the following autorun value:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"internat.exe"
The process Gpwiwo.exe:2640 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "74 B9 B5 96 28 B4 65 A7 0B AB F2 CA 32 4C 22 01"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
The process Gpwiwo.exe:1268 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "79 7F F0 2F 6B E5 4B 05 9F E6 B0 86 B4 15 8B 49"
The process %original file name%.exe:2388 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E2 8F C7 AA 42 3E C9 26 32 91 18 A6 8C 53 36 C8"
The process %original file name%.exe:2492 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E0 5F 42 26 59 5D A9 4E 13 B7 B4 65 96 4B 6C 7C"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
To automatically run itself each time Windows is booted, the Worm adds the following link to its file to the system registry autorun key:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Gpwiwo" = "%Documents and Settings%\%current user%\Application Data\Gpwiwo.exe"
Network activity (URLs)
URL | IP |
---|---|
hxxp://api.wipmania.com/ (ET POLICY External IP Lookup Attempt To Wipmania ) | 69.197.137.58 |
update.jebac.net | Unresolvable |
HOSTS file anomalies
No changes have been detected.
Rootkit activity
The Worm installs the following user-mode hooks in urlmon.dll:
URLDownloadToFileA
URLDownloadToFileW
The Worm installs the following user-mode hooks in WININET.dll:
InternetWriteFile
HttpSendRequestA
HttpSendRequestW
The Worm installs the following user-mode hooks in ADVAPI32.dll:
RegCreateKeyExA
RegCreateKeyExW
The Worm installs the following user-mode hooks in WS2_32.dll:
send
getaddrinfo
The Worm installs the following user-mode hooks in kernel32.dll:
MoveFileA
CopyFileW
CopyFileA
MoveFileW
CreateFileW
CreateFileA
The Worm installs the following user-mode hooks in ntdll.dll:
LdrLoadDll
NtResumeThread
ZwQueryDirectoryFile
ZwEnumerateValueKey
Propagation
A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Worm's file once a user opens a drive's folder in Windows Explorer.A program can register a device notification with the help of RegisterDeviceNotification. So it is notified when a USB device is plugged and then the worm copies itself to the USB device plugged into the affected computer.A worm can spread its copies through the MSN Messanger.
Removals
Remove it with Ad-Aware
- Click (here) to download and install Ad-Aware Free Antivirus.
- Update the definition files.
- Run a full scan of your computer.
Manual removal*
- Scan a system with an anti-rootkit tool.
- Terminate malicious process(es) (How to End a Process With the Task Manager):
Gpwiwo.exe:2640
Gpwiwo.exe:1268
%original file name%.exe:2388
%original file name%.exe:2492 - Delete the original Worm file.
- Delete or disinfect the following files created/modified by the Worm:
%Documents and Settings%\%current user%\Application Data\Gpwiwo.exe (1281 bytes)
- Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Gpwiwo" = "%Documents and Settings%\%current user%\Application Data\Gpwiwo.exe" - Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
- Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
- Reboot the computer.