dllhost.exe

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

Hashes

Type	Hash
MD5	`AE1936CE9A4B92E69493470B1009AD5A`
SHA1	`95C4325460718F5E762347372DF4004EFFFD57FD`
SHA256	`39A4819265D67C89919672D415E22EDB5F74A47BCF28CEEF49F1ACE80A721874`
SHA384	`4DA4B4636BA5FD4A0BEA3F29B2262531C86370A7B300178F264F4859491CC124AEE366298A6CE662384DC6703FD39BB9`
SHA512	`BFAD7DCC1199682CD8857EC43FD72E15CFDD2D91F534314EAB73045E184597BE649E9A67396E3F3E9A02D1EC1ACF65CED69EDEFEACE175B8EBE052741AADF8B0`
SSDEEP	`384:n3Y36g+KrQH8xjIcSWv5WwvDBRJs1xUsl3TvT:n3KMHRcLF1Pst`
IMP	`B7F063F6E914DB6ACB4DCC8D69219A5F`
PESHA1	`CF97E8EC36CA4C62E38832771F6BA196B6AC4D45`
PE256	`8770EFE783C85F7040279DFACDCDB7EEFB2C38E0D5588CD052D035399B5F8F7D`

Runtime Data

Loaded Modules:

Path
C:\WINDOWS\SYSTEM32\ntdll.dll
C:\WINDOWS\System32\wow64.dll
C:\WINDOWS\System32\wow64base.dll
C:\WINDOWS\System32\wow64con.dll
C:\WINDOWS\System32\wow64cpu.dll
C:\WINDOWS\System32\wow64win.dll
C:\WINDOWS\SysWOW64\dllhost.exe

Signature

Status: Signature verified.
Serial: 33000002ED2C45E4C145CF48440000000002ED
Thumbprint: 312860D2047EB81F8F58C29FF19ECDB4C634CF6A
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: 10.0.22000.1 (WinBuild.160101.0800)
Product Version: 10.0.22000.1
Language: English (United States)
Legal Copyright: Microsoft Corporation. All rights reserved.
Machine Type: 32-bit

File Scan

VirusTotal Detections: 0/72
VirusTotal Link: https://www.virustotal.com/gui/file/39a4819265d67c89919672d415e22edb5f74a47bcf28ceef49f1ace80a721874/detection

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