Trojan-Downloader.Win32.Zlob.absq (Kaspersky), Virus.Win32.Virut.b (v) (VIPRE), Trojan.Win32.Agent!IK (Emsisoft), GenericAutorunWorm.YR, GenericInjector.YR, GenericIRCBot.YR (Lavasoft MAS)Behaviour: Trojan-Downloader, Trojan, Worm, Virus, WormAutorun, IRCBot
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: 680f27396e0467f827ef8b4465dd6482
SHA1: fe50ace5fadf6f55da75715ba3b07d73565393ef
SHA256: 314794c877ca8b7bb9a5e240ab8df0ea78924e53217197ceda8d9ee2eab826de
SSDeep: 1536:pwaoqQp3U76fUt2KOKhcYxIwspLFrSvDE83 Ne86x64yUlfWxcv:ExU76wbckXstFrGQxD4yOWxc
Size: 89088 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: BorlandDelphi30, UPolyXv05_v6
Company: no certificate found
Created at: no data
Analyzed on: WindowsXP SP3 32-bit
Summary: Trojan-Downloader. Trojan program, which downloads files from the Internet without user's notice and executes them.
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-Downloader'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. |
Process activity
The Trojan-Downloader creates the following process(es):
%original file name%.exe:1648
Reader_sl.exe:1064
wuauclt.exe:344
jusched.exe:1056
The Trojan-Downloader injects its code into the following process(es):No processes have been created.
File activity
The process %original file name%.exe:1648 makes changes in the file system.
The Trojan-Downloader creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\3ZILFCAH\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\K5670HEX\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\ANW7E3GB\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\CPQNC967\desktop.ini (67 bytes)
%System%\drivers\winlogon.exe (601 bytes)
The process wuauclt.exe:344 makes changes in the file system.
The Trojan-Downloader creates and/or writes to the following file(s):
%WinDir%\SoftwareDistribution\DataStore\Logs\edb.chk (100 bytes)
%WinDir%\SoftwareDistribution\DataStore\Logs\edb.log (3576 bytes)
%WinDir%\SoftwareDistribution\DataStore\DataStore.edb (100 bytes)
The Trojan-Downloader deletes the following file(s):
%WinDir%\SoftwareDistribution\DataStore\Logs\tmp.edb (0 bytes)
The process jusched.exe:1056 makes changes in the file system.
The Trojan-Downloader creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\jusched.log (347 bytes)
Registry activity
The process %original file name%.exe:1648 makes changes in the system registry.
The Trojan-Downloader creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "67 FF 27 7D A5 3D F8 09 28 2E C1 E1 C5 A9 F0 3F"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65452"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65452"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions]
"j" = "c:\%original file name%.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"
To automatically run itself each time Windows is booted, the Trojan-Downloader adds the following link to its file to the system registry autorun key:
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"winlogon.exe" = "%System%\drivers\winlogon.exe"
The process Reader_sl.exe:1064 makes changes in the system registry.
The Trojan-Downloader creates and/or sets the following values in system registry:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
Network activity (URLs)
URL | IP |
---|---|
www.topgameland.com | Unresolvable |
mail.fucuzzy.com | Unresolvable |
mail.tiktikz.com | Unresolvable |
www.genesisstore.sk | Unresolvable |
HOSTS file anomalies
No changes have been detected.
Rootkit activity
No anomalies have been detected.
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-Downloader's file once a user opens a drive's folder in Windows Explorer.
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*
- Terminate malicious process(es) (How to End a Process With the Task Manager):
%original file name%.exe:1648
wuauclt.exe:344 - Delete the original Trojan-Downloader file.
- Delete or disinfect the following files created/modified by the Trojan-Downloader:
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\3ZILFCAH\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\K5670HEX\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\ANW7E3GB\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\CPQNC967\desktop.ini (67 bytes)
%System%\drivers\winlogon.exe (601 bytes)
%WinDir%\SoftwareDistribution\DataStore\Logs\edb.chk (100 bytes)
%WinDir%\SoftwareDistribution\DataStore\Logs\edb.log (3576 bytes)
%WinDir%\SoftwareDistribution\DataStore\DataStore.edb (100 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\jusched.log (347 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"winlogon.exe" = "%System%\drivers\winlogon.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.