Trojan.Win32.IEDummy_86a6c00cd7

by malwarelabrobot on January 23rd, 2014 in Malware Descriptions.

Generic.Rebhip.E14B61CE (BitDefender), Worm:Win32/Rebhip.A (Microsoft), HEUR:Trojan.Win32.Generic (Kaspersky), Worm.Win32.Rebhip.A (v) (VIPRE), BackDoor.Siggen.49176 (DrWeb), Generic.Rebhip.E14B61CE (B) (Emsisoft), Trojan.Gen.2 (Symantec), Worm.Win32.Rebhip (Ikarus), Generic.Rebhip.E14B61CE (FSecure), Luhe.Boxed.A (AVG), Win32:Malware-gen (Avast), TSPY_SPATET.SMT (TrendMicro), Trojan.Win32.IEDummy.FD, GenericAutorunWorm.YR, GenericInjector.YR (Lavasoft MAS)
Behaviour: Trojan, Worm, WormAutorun


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: 86a6c00cd7a5abcd0b6e47b205717032
SHA1: fe4b0a7b6c50a64ff30a732e6ca120873bb3e13f
SHA256: d8eddbf408d2d47c15c4996ed735b513928960a52c17e0222393cd83d6b3fd3f
SSDeep: 3072:JiG9e40HjRWBfvHz7eItPPjtq0svSojstQ9xae1h8geqF/f9DG2FWHJMfXdDv0BH:z4KfvHz7eICYo5xFh8geqRf9hFWHqi
Size: 199680 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: .
Created at: 1992-06-20 01:22:17
Analyzed on: WindowsXP SP3 32-bit


Summary:

Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).

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.


Process activity

The Trojan creates the following process(es):

%original file name%.exe:1744

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

iexplore.exe:1616

File activity

The process iexplore.exe:1616 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\XxX.xXx (64 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\UuU.uUu (72 bytes)
%Documents and Settings%\%current user%\Application Data\logs.dat (15 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\UuU.uUu (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\XxX.xXx (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\XX--XX--XX.txt (0 bytes)

The process %original file name%.exe:1744 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\XX--XX--XX.txt (144 bytes)
C:\Windat\sound\drv\muyss.exe (1281 bytes)

Registry activity

The process iexplore.exe:1616 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "4C 0A 88 B5 40 DC 7C D1 2C 37 91 B6 86 EB A9 3C"

[HKCU\Software\ORM]
"FirstExecution" = "22/01/2014 -- 07:50"
"NewIdentification" = "ORM"

The process %original file name%.exe:1744 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F7 0B 09 4E 4A AF E3 BC 6C 00 65 43 45 D7 1B 6B"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run]
"Policies" = "c:\Windat\sound\drv\muyss.exe"

[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{RJIX537V-BP72-1NF1-6OMV-84TYETB1MJFG}]
"StubPath" = "c:\Windat\sound\drv\muyss.exe Restart"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run]
"Policies" = "c:\Windat\sound\drv\muyss.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:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"HKCU" = "c:\Windat\sound\drv\muyss.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"HKLM" = "c:\Windat\sound\drv\muyss.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

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.


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):

    %original file name%.exe:1744

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

    %Documents and Settings%\%current user%\Local Settings\Temp\XxX.xXx (64 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\UuU.uUu (72 bytes)
    %Documents and Settings%\%current user%\Application Data\logs.dat (15 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\XX--XX--XX.txt (144 bytes)
    C:\Windat\sound\drv\muyss.exe (1281 bytes)

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

    [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
    "HKCU" = "c:\Windat\sound\drv\muyss.exe"

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "HKLM" = "c:\Windat\sound\drv\muyss.exe"

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

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