HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.Win32.Inject.ceea (v) (VIPRE), Trojan.Win32.Buzus!IK (Emsisoft), GenericUSBInfector.YR, GenericUDPFlooder.YR, GenericIRCBot.YR, GenericAutorunWorm.YR, GenericInjector.YR (Lavasoft MAS)Behaviour: Trojan, Flooder, Worm, WormAutorun, IRCBot, UDPFlooder, USBInfector
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: 0bf0f213e52aa9dc2325818dbd557c6b
SHA1: 84896a9344d9088dfebcccff5f00d70b8c827e78
SHA256: aa988333803eab8bcd857008f0a72a09344b1341d4cf832f940f861f9a08cb21
SSDeep: 3072:W op58yOdW5QzRaWzikvyDo5f65M9uc9Bx0:y58yOdW5GRaWzPko5f65M7x0
Size: 112640 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: Armadillov171, MicrosoftVisualC, MicrosoftVisualCv50v60MFC, MicrosoftVisualC50, UPolyXv05_v6
Company: no certificate found
Created at: 2011-02-17 23:06:52
Summary: Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).
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 Trojan'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. |
| 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. |
| 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 Trojan creates the following process(es):
Lskmkx.exe:812
0bf0f213e52aa9dc2325818dbd557c6b.exe:332
File activity
The process 0bf0f213e52aa9dc2325818dbd557c6b.exe:332 makes changes in a file system.
The Trojan creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Application Data\Lskmkx.exe (601 bytes)
Registry activity
The process Lskmkx.exe:812 makes changes in a system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "B0 21 E8 3A 67 D1 D9 4D 67 A7 E2 04 13 D9 F5 9C"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
The process 0bf0f213e52aa9dc2325818dbd557c6b.exe:332 makes changes in a system registry.
The Trojan creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1B A2 73 3B 83 8F 80 C1 DB D8 FC E6 B7 EA E5 55"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system]
"Shell" = "explorer.exe,%Documents and Settings%\%current user%\Application Data\Lskmkx.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System]
"Shell" = "explorer.exe,%Documents and Settings%\%current user%\Application Data\Lskmkx.exe"
To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:
[HKU\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Run]
"Lskmkx" = "%Documents and Settings%\%current user%\Application Data\Lskmkx.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Lskmkx" = "%Documents and Settings%\%current user%\Application Data\Lskmkx.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Lskmkx" = "%Documents and Settings%\%current user%\Application Data\Lskmkx.exe"
Network activity (URLs)
No activity has been detected.
Rootkit activity
The Trojan installs the following user-mode hooks in WININET.dll:
HttpSendRequestW
InternetWriteFile
HttpSendRequestA
The Trojan installs the following user-mode hooks in WS2_32.dll:
send
The Trojan installs the following user-mode hooks in kernel32.dll:
MoveFileA
CopyFileW
CopyFileA
MoveFileW
CreateFileW
CreateFileA
The Trojan 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 Trojan'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.
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):
Lskmkx.exe:812
0bf0f213e52aa9dc2325818dbd557c6b.exe:332 - Delete the original Trojan file.
- Delete or disinfect the following files created/modified by the Trojan:
%Documents and Settings%\%current user%\Application Data\Lskmkx.exe (601 bytes)
- Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKU\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Run]
"Lskmkx" = "%Documents and Settings%\%current user%\Application Data\Lskmkx.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Lskmkx" = "%Documents and Settings%\%current user%\Application Data\Lskmkx.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Lskmkx" = "%Documents and Settings%\%current user%\Application Data\Lskmkx.exe" - Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
- Reboot the computer.