dllhost.exe

File Path: C:\windows\system32\dllhost.exe
Description: COM Surrogate

Hashes

Type	Hash
MD5	`9361355721F51E3A25DF53702D10E9DE`
SHA1	`635D234B72F097105153A8D24080826E404F9273`
SHA256	`1128499AC255BB11F25CD617F766B15F65F9EAB1E0A531200C3878E80C96E41E`
SHA384	`E8677025A1453334CE4BD30D71EF13944F339F10FED67D0C297D3563B1CFA83AD018C9C5CCCCA559C351CE53D6D26FD8`
SHA512	`A73F73D07D8333EFF54AEF32E12709511B12AFB5012AFFAA00E7276E6A3284ECABA4A27C90A619FBF92478D5080E5D05EA0007597D0204FDDF4B9554EF5004C5`
SSDEEP	`384:m9LJSPyHpWPBOBcyQWe5WwDBRJKwlCoZG:G4ysPBOBcJd1PKA`

Signature

Status: Signature verified.
Serial: 330000004EA1D80770A9BBE94400000000004E
Thumbprint: DF3B9B7E5AEA1AA0B82EA25F542A6A00963AB890
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: 6.3.9600.17415 (winblue_r4.141028-1500)
Product Version: 6.3.9600.17415
Language: English (United States)

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