dllhost.exe

File Path: C:\WINDOWS\SysWOW64\dllhost.exe
Description: COM Surrogate

Hashes

Type	Hash
MD5	`60D0B50CFF3A0722ADC274F49FB16F14`
SHA1	`E04E8DEB73F29F336A68FA62CEC8AE863EEFAB90`
SHA256	`4B878483EB200C8731F95096EEF036F285BD36AB916FE550DD484B872E60D037`
SHA384	`6E9BC7DC5C3C9FFBC3F81144668399BD60E4C28D127B5CB8679513CB04F7AAED79ADBE48183987ABDEC9D0FEB5E20056`
SHA512	`934A1D0CE45FB6EDBF0FF25325CBA44A8A99202FAF3B5B1024DECF41E46DE0F3C6FDFBF300CAB1E2FDFD592A6EABFE786FA7E9602C308C6E71A6C26F8403D034`
SSDEEP	`384:TnrG6z40eYJnRB/cCWx5WzbnmXjDBRJPraLbBlwA4BN:nR5eYRRB/cF6bmXj1P0b4`

Signature

Status: Signature verified.
Serial: 330000023241FB59996DCC4DFF000000000232
Thumbprint: FF82BC38E1DA5E596DF374C53E3617F7EDA36B06
Issuer: CN=Microsoft Windows Production PCA 2011, O=Microsoft Corporation, L=Redmond, S=Washington, C=US
Subject: CN=Microsoft Windows, O=Microsoft Corporation, L=Redmond, S=Washington, C=US

File Metadata

Original Filename: dllhost.exe
Product Name: Microsoft Windows Operating System
Company Name: Microsoft Corporation
File Version: 10.0.18362.1 (WinBuild.160101.0800)
Product Version: 10.0.18362.1
Language: English (United States)
Legal Copyright: Microsoft Corporation. All rights reserved.

File Similarity (ssdeep match)

File	Score
C:\Program Files (x86)\Common Files\microsoft shared\Ink\TabTip32.exe	30
C:\Windows\system32\backgroundTaskHost.exe	33
C:\WINDOWS\system32\backgroundTaskHost.exe	30
C:\Windows\system32\browser_broker.exe	29
C:\WINDOWS\system32\dllhost.exe	43
C:\Windows\system32\dllhost.exe	38
C:\Windows\system32\oobe\FirstLogonAnim.exe	38
C:\WINDOWS\system32\oobe\FirstLogonAnim.exe	35
C:\Windows\system32\prproc.exe	35
C:\WINDOWS\system32\prproc.exe	38
C:\Windows\system32\ScriptRunner.exe	33
C:\Windows\system32\SlideToShutDown.exe	32
C:\WINDOWS\system32\SlideToShutDown.exe	33
C:\WINDOWS\SysWOW64\backgroundTaskHost.exe	35
C:\Windows\SysWOW64\backgroundTaskHost.exe	36
C:\Windows\SysWOW64\CameraSettingsUIHost.exe	27
C:\WINDOWS\SysWOW64\CameraSettingsUIHost.exe	25
C:\Windows\SysWOW64\dllhost.exe	36
C:\WINDOWS\SysWOW64\dllhst3g.exe	47

Possible Misuse

The following table contains possible examples of dllhost.exe being misused. While dllhost.exe is not inherently malicious, its legitimate functionality can be abused for malicious purposes.

Source	Source File	Example	License
sigma	file_event_win_creation_system_file.yml	`- '\dllhost.exe'`	DRL 1.0
sigma	file_event_win_susp_adsi_cache_usage.yml	`- 'C:\windows\system32\dllhost.exe'`	DRL 1.0
sigma	file_event_win_uac_bypass_wmp.yml	`Image: 'C:\Windows\system32\DllHost.exe'`	DRL 1.0
sigma	image_load_suspicious_vss_ps_load.yml	`- '\dllhost.exe'`	DRL 1.0
sigma	net_connection_win_dllhost_net_connections.yml	`title: Dllhost Internet Connection`	DRL 1.0
sigma	net_connection_win_dllhost_net_connections.yml	`description: Detects Dllhost that communicates with public IP addresses`	DRL 1.0
sigma	net_connection_win_dllhost_net_connections.yml	`Image\\|endswith: '\dllhost.exe'`	DRL 1.0
sigma	proc_creation_win_apt_unc2452_cmds.yml	`Image\\|endswith: '\dllhost.exe'`	DRL 1.0
sigma	proc_creation_win_cmstp_com_object_access.yml	`ParentImage\\|endswith: '\DllHost.exe'`	DRL 1.0
sigma	proc_creation_win_cobaltstrike_process_patterns.yml	`ParentImage\\|endswith: '\dllhost.exe'`	DRL 1.0
sigma	proc_creation_win_mal_darkside_ransomware.yml	`ParentCommandLine\\|contains: 'DllHost.exe /Processid:{3E5FC7F9-9A51-4367-9063-A120244FBEC7}'`	DRL 1.0
sigma	proc_creation_win_script_event_consumer_spawn.yml	`- '\dllhost.exe'`	DRL 1.0
sigma	proc_creation_win_system_exe_anomaly.yml	`- '\dllhost.exe'`	DRL 1.0
LOLBAS	Dllhost.yml	`Name: Dllhost.exe`
LOLBAS	Dllhost.yml	`- Command: dllhost.exe /Processid:{CLSID}`
LOLBAS	Dllhost.yml	`Description: Use dllhost.exe to load a registered or hijacked COM Server payload.`
LOLBAS	Dllhost.yml	`- Path: C:\Windows\System32\dllhost.exe`
LOLBAS	Dllhost.yml	`- Path: C:\Windows\SysWOW64\dllhost.exe`
LOLBAS	Dllhost.yml	`- IOC: DotNet CLR libraries loaded into dllhost.exe`
LOLBAS	Dllhost.yml	`- IOC: DotNet CLR Usage Log - dllhost.exe.log`
LOLBAS	Dllhost.yml	`- IOC: Suspicious network connectings originating from dllhost.exe`
LOLBAS	Dllhost.yml	`- Link: https://nasbench.medium.com/what-is-the-dllhost-exe-process-actually-running-ef9fe4c19c08`
signature-base	crime_nopetya_jun17.yar	$s7 = “dllhost.dat” fullword wide	CC BY-NC 4.0