Virus.Win32.Sality.atbh_073aa18019

by malwarelabrobot on January 4th, 2014 in Malware Descriptions.

HEUR:Trojan.Win32.Generic (Kaspersky), Virus.Win32.Sality.atbh (v) (VIPRE), Trojan.Win32.Buzus!IK (Emsisoft), GenericUSBInfector.YR, GenericAutorunWorm.YR, GenericUDPFlooder.YR, GenericIRCBot.YR, GenericInjector.YR (Lavasoft MAS)
Behaviour: Trojan, Flooder, Worm, Virus, WormAutorun, IRCBot, UDPFlooder, USBInfector


The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Summary
Technical Details
Removal Recommendations

MD5: 073aa18019284e02b95fd62425c6888d
SHA1: 08a223d0ec73441224a2807c50f9973974316359
SHA256: 66c8a10cf69f4ed74a1ba958ec9bcf1fe6b1e4b48e5f09c5ef3d79611ee07436
SSDeep: 3072:0W0UBJ3SFxH7/SudMhI58O/xVFF76oYUtcFGRj:/BJA5tr5//nLTtckj
Size: 296448 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: Armadillov171, MicrosoftVisualC, MicrosoftVisualCv50v60MFC, MicrosoftVisualC50, UPolyXv05_v6
Company: Rapiddown
Created at: 1995-09-19 02:33:02
Analyzed on: WindowsXP SP3 32-bit


Summary:

Virus. A program that recursively replicates a possibly evolved copy of itself.

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 Virus'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 Virus creates the following process(es):

Lskmkx.exe:312
%original file name%.exe:616

The Virus injects its code into the following process(es):
No processes have been created.

File activity

The process %original file name%.exe:616 makes changes in the file system.
The Virus creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\Lskmkx.exe (1425 bytes)

Registry activity

The process Lskmkx.exe:312 makes changes in the system registry.
The Virus creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "66 6D F1 52 24 98 6C B3 9F 23 AF BD EA 65 96 0B"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

The process %original file name%.exe:616 makes changes in the system registry.
The Virus creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "4A 74 13 46 77 D3 A3 F2 54 37 C1 6F D6 66 A2 89"

[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 Virus 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.

HOSTS file anomalies

No changes have been detected.

Rootkit activity

The Virus installs the following user-mode hooks in WININET.dll:

HttpSendRequestW
InternetWriteFile
HttpSendRequestA

The Virus installs the following user-mode hooks in WS2_32.dll:

send

The Virus installs the following user-mode hooks in kernel32.dll:

MoveFileA
CopyFileW
CopyFileA
MoveFileW
CreateFileW
CreateFileA

The Virus 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 Virus'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.


Remove it with Ad-Aware

  1. Click (here) to download and install Ad-Aware Free Antivirus.
  2. Update the definition files.
  3. Run a full scan of your computer.


Manual removal*

  1. Scan a system with an anti-rootkit tool.
  2. Terminate malicious process(es) (How to End a Process With the Task Manager):

    Lskmkx.exe:312
    %original file name%.exe:616

  3. Delete the original Virus file.
  4. Delete or disinfect the following files created/modified by the Virus:

    %Documents and Settings%\%current user%\Application Data\Lskmkx.exe (1425 bytes)

  5. 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"

  6. Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
  7. Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.