Worm.Win32.Dorkbot_71c25625fd
Trojan.Win32.Tibs.i (Kaspersky), Virus.Win32.Sality.ah (v) (VIPRE), Backdoor.Win32.Ruskill!IK (Emsisoft), Worm.Win32.Dorkbot.FD, GenericUSBInfector.YR, GenericProxy.YR, GenericSYNFlooder.YR, GenericUDPFlooder.YR, GenericDNSBlocker.YR, GenericMSNWorm.YR, GenericIRCBot.YR, GenericAutorunWorm.YR, WormDorkbot.YR, GenericPhysicalDrive0.YR, GenericInjector.YR, BankerGeneric.YR (Lavasoft MAS)
Behaviour: Banker, Trojan, Backdoor, Flooder, Worm, Virus, 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.
MD5: 71c25625fdb55e988cc471b9836fcbde
SHA1: 7d49a20be756f537ce20d17310817abd88fa8378
SHA256: bca463698fd7f746649020fa5d42b6ecf5657895ff9a3d115183e4345bf15f33
SSDeep: 6144:h8qHfp/9ArDXaPNsizCGaxOnCHf5x72q3:hjR0mPadGaxOn0P3
Size: 204800 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2011-07-07 21:31:44
Summary:
Worm. A program that is primarily replicating on networks or removable drives.
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):
71c25625fdb55e988cc471b9836fcbde.exe:1712
71c25625fdb55e988cc471b9836fcbde.exe:1284
Xtkmkj.exe:1316
Xtkmkj.exe:1692
File activity
The process 71c25625fdb55e988cc471b9836fcbde.exe:1284 makes changes in a file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Application Data\Xtkmkj.exe (1281 bytes)
Registry activity
The process 71c25625fdb55e988cc471b9836fcbde.exe:1712 makes changes in a system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Security Center]
"UacDisableNotify" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center]
"AntiVirusOverride" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center\Svc]
"UpdatesDisableNotify" = "1"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
"Hidden" = "2"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\system]
"DisableRegistryTools" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center\Svc]
"FirewallOverride" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center]
"UpdatesDisableNotify" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center]
"FirewallOverride" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center]
"FirewallDisableNotify" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center\Svc]
"AntiVirusOverride" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center\Svc]
"UacDisableNotify" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center\Svc]
"FirewallDisableNotify" = "1"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\system]
"DisableTaskMgr" = "1"
Antivirus notifications are disabled:
[HKLM\SOFTWARE\Microsoft\Security Center]
"AntiVirusDisableNotify" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center\Svc]
"AntiVirusDisableNotify" = "1"
The process 71c25625fdb55e988cc471b9836fcbde.exe:1284 makes changes in a system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "11 7B F9 16 E6 71 3C DF BC 0E 9B 96 44 68 3E 09"
[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]
"Xtkmkj" = "%Documents and Settings%\%current user%\Application Data\Xtkmkj.exe"
The process Xtkmkj.exe:1316 makes changes in a system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Security Center]
"UacDisableNotify" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center]
"AntiVirusOverride" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center\Svc]
"UpdatesDisableNotify" = "1"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
"Hidden" = "2"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\system]
"DisableRegistryTools" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center\Svc]
"FirewallOverride" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center]
"UpdatesDisableNotify" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center]
"FirewallOverride" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center]
"FirewallDisableNotify" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center\Svc]
"AntiVirusOverride" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center\Svc]
"UacDisableNotify" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center\Svc]
"FirewallDisableNotify" = "1"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\system]
"DisableTaskMgr" = "1"
Antivirus notifications are disabled:
[HKLM\SOFTWARE\Microsoft\Security Center]
"AntiVirusDisableNotify" = "1"
[HKLM\SOFTWARE\Microsoft\Security Center\Svc]
"AntiVirusDisableNotify" = "1"
The process Xtkmkj.exe:1692 makes changes in a system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "8D 56 F7 DE 74 B9 D5 FE C5 E7 BF 9D CE 14 69 2A"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
Network activity (URLs)
| URL | IP |
|---|---|
| hxxp://api.wipmania.com/ (ET POLICY External IP Lookup Attempt To Wipmania ) |  69.197.137.58 |
| ng.themarketbaby.com |  59.51.114.85 |
| ng.marketallone.com |  Unresolvable |
Rootkit activity
The Worm installs the following user-mode hooks in WININET.dll:
HttpSendRequestW
InternetWriteFile
HttpSendRequestA
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
GetAddrInfoW
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
NtQueryDirectoryFile
NtEnumerateValueKey
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.
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):
71c25625fdb55e988cc471b9836fcbde.exe:1712
71c25625fdb55e988cc471b9836fcbde.exe:1284
Xtkmkj.exe:1316
Xtkmkj.exe:1692 - Delete the original Worm file.
- Delete or disinfect the following files created/modified by the Worm:
%Documents and Settings%\%current user%\Application Data\Xtkmkj.exe (1281 bytes)
- Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Xtkmkj" = "%Documents and Settings%\%current user%\Application Data\Xtkmkj.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.
*Manual removal may cause unexpected system behaviour and should be performed at your own risk.
