Virus.Win32.Duel_85bbc8383a

by malwarelabrobot on November 16th, 2013 in Malware Descriptions.

MemScan:Backdoor.Agent.ZQA (BitDefender), Virus:Win32/Duel.A@mm (Microsoft), HEUR:Trojan.Win32.Generic (Kaspersky), LooksLike.Win32.Malware!B (v) (VIPRE), Win32.HLLM.Dref (DrWeb), MemScan:Backdoor.Agent.ZQA (B) (Emsisoft), Generic-FAGI!85BBC8383ADC (McAfee), W32.Mixor (Symantec), Email-Worm.Win32.LoveLetter (Ikarus), MemScan:Backdoor.Agent.ZQA (FSecure), I-Worm/Loveletter.A (AVG), Win32:LoveLetter-BE [Wrm] (Avast), Mal_Xed-3 (TrendMicro), Virus.Win32.Duel.FD, GenericEmailWorm.YR, GenericIRCBot.YR (Lavasoft MAS)
Behaviour: Trojan, Backdoor, Worm, Email-Worm, EmailWorm, Virus, IRCBot


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: 85bbc8383adca63aa0612a3922a7d1d1
SHA1: 4f40a53009bd9be75eba26e5ffbd778279c61619
SHA256: 2649253f4535302db3595c2d8bfa04e1cb9aaa5a2251ca089feb16a7f1365946
SSDeep: 1536:7biUoh IlZGobbSDLqNx3DWokr/wk26n4ugDvfG4:CUEiQZx3a37 en8v
Size: 61952 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: WinterSoft
Created at: no data


Summary:

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

Payload

Behaviour Description
EmailWorm Worm can send e-mails.
IRCBot A bot can communicate with command and control servers via IRC channel.


Process activity

The Virus creates the following process(es):

dwwin.exe:368
%original file name%.exe:1120

The Virus injects its code into the following process(es):

abaiajy.cmd:956

File activity

The process dwwin.exe:368 makes changes in the file system.
The Virus creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\4JAHID6P\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\C9URGTM3\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\8E2E7.dmp (71755 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\91UHOTOH\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\QHFA4EOO\desktop.ini (67 bytes)

The process %original file name%.exe:1120 makes changes in the file system.
The Virus creates and/or writes to the following file(s):

%WinDir%\xwrm.exe (61 bytes)
D:\abaiajy.cmd (19 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\zzzzqb.bqqj.ibr (61 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\dff4_appcompat.txt (6214 bytes)

The process abaiajy.cmd:956 makes changes in the file system.
The Virus creates and/or writes to the following file(s):

%System%\WindowsUpdt.exe (19 bytes)

Registry activity

The process dwwin.exe:368 makes changes in the system registry.
The Virus creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A8 19 3D 2E 16 17 14 4F 80 17 2A 68 DF F4 95 E5"

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

[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

[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"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"MigrateProxy" = "1"

[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\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

[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"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 14 00 00 00 01 00 00 00 00 00 00 00"

[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"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Personal" = "%Documents and Settings%\%current user%\My Documents"

Proxy settings are disabled:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

The Virus deletes the following value(s) in system registry:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"

The process %original file name%.exe:1120 makes changes in the system registry.
The Virus creates and/or sets the following values in system registry:
To automatically run itself each time Windows is booted, the Virus adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"x32x" = "%WinDir%\xwrm.exe"

The Virus deletes the following registry key(s):

[HKLM\SOFTWARE\Microsoft\PCHealth\ErrorReporting\DW]

The Virus deletes the following value(s) in system registry:

[HKLM\SOFTWARE\Microsoft\PCHealth\ErrorReporting\DW]
"DWFileTreeRoot"

The process abaiajy.cmd:956 makes changes in the system registry.
The Virus creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "93 31 D1 34 DC B4 B7 0C 23 ED 48 12 39 41 11 AF"

To automatically run itself each time Windows is booted, the Virus adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"WihdowsUpdate" = "%System%\WindowsUpdt.exe"

Network activity (URLs)

No activity has been detected.

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation


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. Terminate malicious process(es) (How to End a Process With the Task Manager):

    dwwin.exe:368
    %original file name%.exe:1120

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

    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\4JAHID6P\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\C9URGTM3\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\8E2E7.dmp (71755 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\91UHOTOH\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\QHFA4EOO\desktop.ini (67 bytes)
    %WinDir%\xwrm.exe (61 bytes)
    D:\abaiajy.cmd (19 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\zzzzqb.bqqj.ibr (61 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\dff4_appcompat.txt (6214 bytes)
    %System%\WindowsUpdt.exe (19 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "x32x" = "%WinDir%\xwrm.exe"

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "WihdowsUpdate" = "%System%\WindowsUpdt.exe"

  5. Reboot the computer.

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

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