sigmahighHunting

Suspicious HH.EXE Execution

Detects a suspicious execution of a Microsoft HTML Help (HH.exe)

MITRE ATT&CK

T1047 T1059.001 T1059.003 T1059.005 T1059.007 T1218 T1218.001 T1218.010 T1218.011 T1566 T1566.001

defense-evasionexecutioninitial-access

Detection Query

selection_img:
  - OriginalFileName: HH.exe
  - Image|endswith: \hh.exe
selection_paths:
  CommandLine|contains:
    - .application
    - \AppData\Local\Temp\
    - \Content.Outlook\
    - \Downloads\
    - \Users\Public\
    - \Windows\Temp\
condition: all of selection_*

Author

Maxim Pavlunin

Created

2020-04-01

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.defense-evasionattack.executionattack.initial-accessattack.t1047attack.t1059.001attack.t1059.003attack.t1059.005attack.t1059.007attack.t1218attack.t1218.001attack.t1218.010attack.t1218.011attack.t1566attack.t1566.001

Raw Content

title: Suspicious HH.EXE Execution
id: e8a95b5e-c891-46e2-b33a-93937d3abc31
status: test
description: Detects a suspicious execution of a Microsoft HTML Help (HH.exe)
references:
    - https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/chm-badness-delivers-a-banking-trojan/
    - https://github.com/elastic/protections-artifacts/commit/746086721fd385d9f5c6647cada1788db4aea95f#diff-27939090904026cc396b0b629c8e4314acd6f5dac40a676edbc87f4567b47eb7
    - https://www.ptsecurity.com/ww-en/analytics/pt-esc-threat-intelligence/higaisa-or-winnti-apt-41-backdoors-old-and-new/
    - https://www.zscaler.com/blogs/security-research/unintentional-leak-glimpse-attack-vectors-apt37
author: Maxim Pavlunin
date: 2020-04-01
modified: 2023-04-12
tags:
    - attack.defense-evasion
    - attack.execution
    - attack.initial-access
    - attack.t1047
    - attack.t1059.001
    - attack.t1059.003
    - attack.t1059.005
    - attack.t1059.007
    - attack.t1218
    - attack.t1218.001
    - attack.t1218.010
    - attack.t1218.011
    - attack.t1566
    - attack.t1566.001
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - OriginalFileName: 'HH.exe'
        - Image|endswith: '\hh.exe'
    selection_paths:
        CommandLine|contains:
            - '.application'
            - '\AppData\Local\Temp\'
            - '\Content.Outlook\'
            - '\Downloads\'
            - '\Users\Public\'
            - '\Windows\Temp\'
            # - '\AppData\Local\Temp\Temp?_'
            # - '\AppData\Local\Temp\Rar$'
            # - '\AppData\Local\Temp\7z'
            # - '\AppData\Local\Temp\wz'
            # - '\AppData\Local\Temp\peazip-tmp'
    condition: all of selection_*
falsepositives:
    - Unknown
level: high