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Backdoor.Necurs

Posted: January 15, 2014

Threat Metric

Ranking: 13,361
Threat Level: 6/10
Infected PCs: 98,368
First Seen: January 15, 2014
Last Seen: September 14, 2023
OS(es) Affected: Windows

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:



C:\Users\<username>\AppData\Local\Temp\ecd992a7.tmp File name: ecd992a7.tmp
Size: 253.95 KB (253952 bytes)
MD5: 0756b23d32f9ab95a4f0b0682277612e
Detection count: 2,712
File type: Temporary File
Mime Type: unknown/tmp
Path: C:\Users\<username>\AppData\Local\Temp\ecd992a7.tmp
Group: Malware file
Last Updated: February 5, 2022
%WINDIR%\Installer\{779E6C16-DD20-CC8A-B306-D46A92885CEE}\syshost.exe File name: syshost.exe
Size: 245.87 KB (245872 bytes)
MD5: 8f548575d437d7f02bfc08f8025e9f53
Detection count: 1,724
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%\Installer\{779E6C16-DD20-CC8A-B306-D46A92885CEE}
Group: Malware file
Last Updated: September 30, 2017
C:\Windows\Installer\{A2325E97-0BA1-9B2E-D90E-20C4B8F563C2}\syshost.exe File name: syshost.exe
Size: 152.57 KB (152576 bytes)
MD5: 943a641f4336f919a14bb10cad6daa5e
Detection count: 1,225
File type: Executable File
Mime Type: unknown/exe
Path: C:\Windows\Installer\{A2325E97-0BA1-9B2E-D90E-20C4B8F563C2}\syshost.exe
Group: Malware file
Last Updated: November 7, 2021
C:\Windows\Installer\{1EFA22F1-497A-899A-7896-AC5E565220E3}\syshost.exe File name: syshost.exe
Size: 172.03 KB (172032 bytes)
MD5: 4ce11aab335b7e53a86e5a5ba59c0f91
Detection count: 1,143
File type: Executable File
Mime Type: unknown/exe
Path: C:\Windows\Installer\{1EFA22F1-497A-899A-7896-AC5E565220E3}\syshost.exe
Group: Malware file
Last Updated: September 25, 2022
%WINDIR%\Installer\{A4428EAA-2336-B8FE-25C9-914A0561DBF2}\syshost.exe File name: syshost.exe
Size: 288.76 KB (288768 bytes)
MD5: 4bc2b4c8a582983d71bd1767f6956259
Detection count: 911
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%\Installer\{A4428EAA-2336-B8FE-25C9-914A0561DBF2}\syshost.exe
Group: Malware file
Last Updated: October 18, 2021
%WINDIR%\Installer\{0C2A7C39-10D6-0DEE-6A97-C5B54A78194D}\syshost.exe File name: syshost.exe
Size: 105.98 KB (105984 bytes)
MD5: df9b7e080e31d93b6e9606818d380ef8
Detection count: 827
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%\Installer\{0C2A7C39-10D6-0DEE-6A97-C5B54A78194D}
Group: Malware file
Last Updated: April 30, 2016
C:\Users\<username>\AppData\Local\Temp\KB1357552703.exe File name: KB1357552703.exe
Size: 233.47 KB (233472 bytes)
MD5: 5fcf43009cd3c277bdc04b51f5bc59ff
Detection count: 525
File type: Executable File
Mime Type: unknown/exe
Path: C:\Users\<username>\AppData\Local\Temp\KB1357552703.exe
Group: Malware file
Last Updated: November 21, 2022
%WINDIR%\Installer\{DD90B3E8-07F5-8272-CBEA-A66FAB7581D0}\syshost.exe File name: syshost.exe
Size: 112.12 KB (112128 bytes)
MD5: 6ec2eb9d8a2df3679cf93a48644fb9e4
Detection count: 412
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%\Installer\{DD90B3E8-07F5-8272-CBEA-A66FAB7581D0}
Group: Malware file
Last Updated: June 7, 2020
%WINDIR%\Installer\{3473D297-A863-A883-3273-13421251E715}\syshost.exe File name: syshost.exe
Size: 103.93 KB (103936 bytes)
MD5: 1f816147b9dffa70e960598eafa1296e
Detection count: 379
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%\Installer\{3473D297-A863-A883-3273-13421251E715}
Group: Malware file
Last Updated: April 30, 2016
%LOCALAPPDATA%\{4D9A7FE6-6759-6531-4C99-76302C15322E}\syshost.exe File name: syshost.exe
Size: 265.72 KB (265728 bytes)
MD5: cf69dd6310138fa009ce8509c4cfbcbc
Detection count: 370
File type: Executable File
Mime Type: unknown/exe
Path: %LOCALAPPDATA%\{4D9A7FE6-6759-6531-4C99-76302C15322E}
Group: Malware file
Last Updated: August 7, 2020
C:\Users\<username>\AppData\Local\{1FCCFDFF-0FE6-27BA-9D63-928A7D3F3FCD}\syshost.exe File name: syshost.exe
Size: 208.89 KB (208896 bytes)
MD5: 0f9d31f8e6824aa99f5934f89e5a92c8
Detection count: 337
File type: Executable File
Mime Type: unknown/exe
Path: C:\Users\<username>\AppData\Local\{1FCCFDFF-0FE6-27BA-9D63-928A7D3F3FCD}\syshost.exe
Group: Malware file
Last Updated: March 24, 2022
%WINDIR%\Installer\{5852AC57-60D2-0F86-AE2C-BAAC8DFC5E4C}\syshost.exe File name: syshost.exe
Size: 110.59 KB (110592 bytes)
MD5: cc4a642b62a8b0eac345f23792f4daa2
Detection count: 222
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%\Installer\{5852AC57-60D2-0F86-AE2C-BAAC8DFC5E4C}
Group: Malware file
Last Updated: May 4, 2020
C:\Windows\Installer\{2C8A20CF-AE11-4419-A818-3A5F87C82D61}\syshost.exe File name: syshost.exe
Size: 133.58 KB (133583 bytes)
MD5: 4a14bd6ca87a5ae21727a79f284f3daa
Detection count: 215
File type: Executable File
Mime Type: unknown/exe
Path: C:\Windows\Installer\{2C8A20CF-AE11-4419-A818-3A5F87C82D61}\syshost.exe
Group: Malware file
Last Updated: April 8, 2023
%WINDIR%\Installer\{ED64E7B3-BA2B-A59B-30DB-DD81105AE17C}\syshost.exe File name: syshost.exe
Size: 100.35 KB (100352 bytes)
MD5: dc742b7d8b0d991d9bbce487d62a608a
Detection count: 213
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%\Installer\{ED64E7B3-BA2B-A59B-30DB-DD81105AE17C}
Group: Malware file
Last Updated: September 30, 2017
%WINDIR%\Installer\{67AE7120-E49E-8EE7-6E15-F69C4D97237B}\syshost.exe File name: syshost.exe
Size: 240.31 KB (240310 bytes)
MD5: f2e93490080c4793d3d043a82d5b15f9
Detection count: 208
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%\Installer\{67AE7120-E49E-8EE7-6E15-F69C4D97237B}
Group: Malware file
Last Updated: September 30, 2017
%WINDIR%\Installer\{66F4BB67-E942-F363-0044-C2E2DFE5268D}\syshost.exe File name: syshost.exe
Size: 85.5 KB (85504 bytes)
MD5: 2791a4c680d0d24c74c83962732a8631
Detection count: 187
File type: Executable File
Mime Type: unknown/exe
Path: %WINDIR%\Installer\{66F4BB67-E942-F363-0044-C2E2DFE5268D}
Group: Malware file
Last Updated: September 30, 2017
%LOCALAPPDATA%\{1CBD7270-6C9D-C4C7-9C47-FCBD7B320F77}\syshost.exe File name: syshost.exe
Size: 220.2 KB (220201 bytes)
MD5: bf258768b6df9e423ddff1ef1b4c2343
Detection count: 145
File type: Executable File
Mime Type: unknown/exe
Path: %LOCALAPPDATA%\{1CBD7270-6C9D-C4C7-9C47-FCBD7B320F77}
Group: Malware file
Last Updated: September 30, 2017
%LOCALAPPDATA%\{0297ED2D-3E22-49DE-1343-F5DAF256C729}\syshost.exe File name: syshost.exe
Size: 131.07 KB (131072 bytes)
MD5: 2cfe9c78a65207e9d473af371fb01da6
Detection count: 75
File type: Executable File
Mime Type: unknown/exe
Path: %LOCALAPPDATA%\{0297ED2D-3E22-49DE-1343-F5DAF256C729}
Group: Malware file
Last Updated: September 30, 2017

More files

Registry Modifications

The following newly produced Registry Values are:

HKEY..\..\..\..{RegistryKeys}SYSTEM\ControlSet001\Services\syshost32SYSTEM\ControlSet002\Services\syshost32SYSTEM\CurrentControlSet\Services\syshost32
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