Home Malware Programs Trojans Dropper.Sirefef.B

Dropper.Sirefef.B

Posted: June 1, 2011

Threat Metric

Threat Level: 8/10
Infected PCs: 7,481
First Seen: June 1, 2011
Last Seen: January 20, 2022
OS(es) Affected: Windows

Aliases

TR/Drop.Sirefef.B.413 [AntiVir]Artemis!452EA76E0191 [McAfee]Artemis!4C4ABC0F73C6 [McAfee]Rootkit.Win32.SuspectCRC.Win32.SuspectCRC.Sirefef. [Ikarus]Generic Dropper!1gl [McAfee-GW-Edition]TR/Sirefef.IM [AntiVir]TR/Drop.Sirefef.B.196 [AntiVir]Gen:Variant.Barys.368 [BitDefender]a variant of Win32/Rootkit.Kryptik.KL [NOD32]Trojan-FAFL!CAA554890A03 [McAfee]Generic27.ADJM [AVG]TR/Drop.Sirefef.B.710 [AntiVir]TrojWare.Win32.Rootkit.ZAccess.CV [Comodo]Gen:Variant.Kazy.58868 [BitDefender]Trojan.Win32.Yakes.qcm [Kaspersky]
More aliases (2222)

Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:



%WINDIR%\System32\drivers\netbt.sys File name: netbt.sys
Size: 185.85 KB (185856 bytes)
MD5: e42c5ccb01fd4184ea07c7becbc44134
Detection count: 326
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: June 17, 2016
%WINDIR%\System32\drivers\netbt.sys File name: netbt.sys
Size: 162.81 KB (162816 bytes)
MD5: 03e71c5d6a62ea6a4fbbaba3f4c06d4a
Detection count: 286
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: June 17, 2016
%WINDIR%\System32\drivers\redbook.sys File name: redbook.sys
Size: 58.24 KB (58240 bytes)
MD5: f07f430836829ccdcade1b74afdfe056
Detection count: 95
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: February 22, 2013
%LOCALAPPDATA%\9c2e62ce\X File name: X
Size: 54.27 KB (54272 bytes)
MD5: 44c4a66a69e1b2b8531724c2cdfe2ae1
Detection count: 91
Path: %LOCALAPPDATA%\9c2e62ce
Group: Malware file
Last Updated: October 18, 2012
%WINDIR%\System32\drivers\i8042prt.sys File name: i8042prt.sys
Size: 54.78 KB (54784 bytes)
MD5: 7c877c89a98395ce6ad87477c646e80f
Detection count: 91
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: October 24, 2012
%WINDIR%\System32\drivers\redbook.sys File name: redbook.sys
Size: 57.6 KB (57600 bytes)
MD5: a88158f0ac39bc0aea034db303cc40d6
Detection count: 90
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: November 26, 2012
%USERPROFILE%\Configuraci?n local\Datos de programa\6de5bb83\X File name: X
Size: 54.27 KB (54272 bytes)
MD5: dbceb3bbedd13fb083765c4d4c289247
Detection count: 87
Path: %USERPROFILE%\Configuraci?n local\Datos de programa\6de5bb83
Group: Malware file
Last Updated: January 5, 2013
%WINDIR%\System32\drivers\serial.sys File name: serial.sys
Size: 83.45 KB (83456 bytes)
MD5: 48c6521196eccdf740d085ad6fc51bf6
Detection count: 86
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: October 5, 2012
%WINDIR%\System32\drivers\ipsec.sys File name: ipsec.sys
Size: 75.26 KB (75264 bytes)
MD5: f7e34abf063093749732b8340904ebd1
Detection count: 81
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: September 10, 2012
%LOCALAPPDATA%\b116d70e\X File name: X
Size: 54.78 KB (54784 bytes)
MD5: 96351fb232c11b76fdd7e81b95728037
Detection count: 61
Path: %LOCALAPPDATA%\b116d70e
Group: Malware file
Last Updated: January 21, 2013
%LOCALAPPDATA%\57e03721\X File name: X
Size: 54.78 KB (54784 bytes)
MD5: 6274ce4b85ca8a51cf1763f9a762b450
Detection count: 53
Path: %LOCALAPPDATA%\57e03721
Group: Malware file
Last Updated: December 20, 2012
%WINDIR%\System32\drivers\dfsc.sys File name: dfsc.sys
Size: 75.26 KB (75264 bytes)
MD5: 60b426e8ec759ac68a25f2f8c9bc3d0e
Detection count: 44
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: April 10, 2013
%WINDIR%\System32\drivers\netbt.sys File name: netbt.sys
Size: 162.81 KB (162816 bytes)
MD5: b805fd1449d0638787b5ac8f4ff2c6da
Detection count: 35
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: July 20, 2012
%LOCALAPPDATA%\e14742ef\X File name: X
Size: 53.76 KB (53760 bytes)
MD5: 24cc17350d07a242c97df1cab0988a3d
Detection count: 26
Path: %LOCALAPPDATA%\e14742ef
Group: Malware file
Last Updated: March 12, 2013
%WINDIR%\System32\drivers\dfsc.sys File name: dfsc.sys
Size: 75.26 KB (75264 bytes)
MD5: 048d6fec8033b3c0ed624693ec9ada2b
Detection count: 26
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: April 2, 2013
%USERPROFILE%\Configuraci?n local\Datos de programa\1ae4e484\X File name: X
Size: 55.8 KB (55808 bytes)
MD5: aa7384274ab0807565d0713b8782305b
Detection count: 16
Path: %USERPROFILE%\Configuraci?n local\Datos de programa\1ae4e484
Group: Malware file
Last Updated: November 19, 2012
%LOCALAPPDATA%\9756cbb2\X File name: X
Size: 54.78 KB (54784 bytes)
MD5: 56084d735a0ca7da9e6f2b4ebd4ecd8d
Detection count: 12
Path: %LOCALAPPDATA%\9756cbb2
Group: Malware file
Last Updated: July 23, 2012
%LOCALAPPDATA%\3468af57\X File name: X
Size: 54.27 KB (54272 bytes)
MD5: 75b17c3a2e7f0f746d59eca0db4163e7
Detection count: 9
Path: %LOCALAPPDATA%\3468af57
Group: Malware file
Last Updated: January 21, 2013
%WINDIR%\system32\drivers\cdrom.sys File name: cdrom.sys
Size: 108.54 KB (108544 bytes)
MD5: 11c061f3f301577d7949b2a85ec830cd
Detection count: 7
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\system32\drivers
Group: Malware file
Last Updated: August 21, 2012
%WINDIR%\System32\drivers\dfsc.sys File name: dfsc.sys
Size: 75.26 KB (75264 bytes)
MD5: a8f9797d685d48048d2afa7d28de08ab
Detection count: 7
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: November 2, 2012
%WINDIR%\System32\drivers\mrxsmb.sys File name: mrxsmb.sys
Size: 456.32 KB (456320 bytes)
MD5: 5a52ec4c22a8e9065bf5080432899801
Detection count: 7
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: November 12, 2012
%WINDIR%\System32\drivers\dfsc.sys File name: dfsc.sys
Size: 78.33 KB (78336 bytes)
MD5: caa554890a0340afa73cee4516d68fb9
Detection count: 5
File type: System file
Mime Type: unknown/sys
Path: %WINDIR%\System32\drivers
Group: Malware file
Last Updated: April 8, 2013

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