Gen:Variant.MSILKrypt.6 (BitDefender), Trojan.Win32.Reconyc.fvc (Kaspersky), Gen:Variant.MSILKrypt.6 (B) (Emsisoft), Artemis!07211D142890 (McAfee), Trojan-Downloader (Ikarus), Gen:Variant.MSILKrypt.6 (FSecure), MSIL:Downloader-LD [Trj] (Avast), Backdoor.Win32.PcClient.FD, Worm.Win32.Ainslot.VB.FD, GenericAutorunWorm.YR, WormAinslot_VariantOfZeus.YR (Lavasoft MAS)Behaviour: Trojan-Downloader, Trojan, Backdoor, Worm, WormAutorun
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: 07211d142890f0f51588a68c1119c822
SHA1: e03832b46f8ec57542f420e2a19cc06f958a1a4e
SHA256: ed17c0ee17f2d3add061775e0d13d6bf3a3f113a27bc3ee78599b1b9495e7279
SSDeep: 3072:m/hCQbkcfQCYRlww1Gni2SSyrsiec280alUE0YtwNHCSZLTcK:mLm6nr7ct8E0uas
Size: 201728 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2013-11-01 17:56:38
Analyzed on: WindowsXP SP3 32-bit
Summary: Worm. A program that is primarily replicating on networks or removable drives.
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 Worm's file once a user opens a drive's folder in Windows Explorer. |
Process activity
The Worm creates the following process(es):
rundll32.exe:1520
dumprep.exe:1536
dumprep.exe:1228
The Worm injects its code into the following process(es):
%original file name%.exe:508
File activity
The process %original file name%.exe:508 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Application Data\XywU7TCHlHV\Njf6X0qm.exe (201 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\xcoca.ine (7547 bytes)
The process dumprep.exe:1536 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\WERadb6.dir00\svchost.exe.mdmp (87325 bytes)
The process dumprep.exe:1228 makes changes in the file system.
The Worm creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\WERadb6.dir00\svchost.exe.hdmp (186817 bytes)
Registry activity
The process %original file name%.exe:508 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A8 2F 4A CB D4 E9 F3 68 37 24 32 88 B4 05 E4 5A"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
"Local AppData" = "%Documents and Settings%\%current user%\Local Settings\Application Data"
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
To automatically run itself each time Windows is booted, the Worm adds the following link to its file to the system registry autorun key:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Njf6X0qm" = "%Documents and Settings%\%current user%\Local Settings\Application Data\XywU7TCHlHV\Njf6X0qm.exe"
The process rundll32.exe:1520 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "11 62 E7 FE 39 51 84 46 36 3E 62 7A C4 B8 5C 41"
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers\%Documents and Settings%\%current user%\Local Settings\Temp]
"svchost.exe" = "EnableNXShowUI"
[HKLM\System\CurrentControlSet\Control\Session Manager\AppCompatibility]
"AppCompatCache" = "EF BE AD DE 60 00 00 00 00 00 00 00 00 00 00 00"
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Local Settings\Temp]
"svchost.exe" = "Visual Basic Command Line Compiler"
The process dumprep.exe:1536 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "AF 52 CD 8C 50 A8 59 C8 4A 9E 03 4B 75 72 78 4C"
The process dumprep.exe:1228 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "2F 98 36 4E C4 83 58 25 F5 7D 8E 60 1C AF 3D 6B"
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 Worm'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):
rundll32.exe:1520
dumprep.exe:1536
dumprep.exe:1228 - Delete the original Worm file.
- Delete or disinfect the following files created/modified by the Worm:
%Documents and Settings%\%current user%\Local Settings\Application Data\XywU7TCHlHV\Njf6X0qm.exe (201 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\xcoca.ine (7547 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\WERadb6.dir00\svchost.exe.mdmp (87325 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\WERadb6.dir00\svchost.exe.hdmp (186817 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Njf6X0qm" = "%Documents and Settings%\%current user%\Local Settings\Application Data\XywU7TCHlHV\Njf6X0qm.exe" - Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
- Reboot the computer.