Sigma Rule Library

Lace Tempest Malware Loader Execution

Detects execution of a specific binary based on filename and hash used by Lace Tempest to load additional malware as reported by SysAid Team

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Detection logic

selection_img

Image|endswith: :\Program Files\SysAidServer\tomcat\webapps\usersfiles\user.exe

selection_hash

Hashes|contains: SHA256=B5ACF14CDAC40BE590318DEE95425D0746E85B1B7B1CBD14DA66F21F2522BF4D

Condition

1 of selection_*

Raw YAML

title: Lace Tempest Malware Loader Execution
id: 745ea50b-9673-4ba7-9426-cb45cf4a8e6d
status: test
description: Detects execution of a specific binary based on filename and hash used by Lace Tempest to load additional malware as reported by SysAid Team
references:
    - https://www.sysaid.com/blog/service-desk/on-premise-software-security-vulnerability-notification
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-11-09
tags:
    - attack.execution
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        Image|endswith: ':\Program Files\SysAidServer\tomcat\webapps\usersfiles\user.exe'
    selection_hash:
        Hashes|contains: 'SHA256=B5ACF14CDAC40BE590318DEE95425D0746E85B1B7B1CBD14DA66F21F2522BF4D'
    condition: 1 of selection_*
falsepositives:
    - Unlikely
level: high

False positives

  • Unlikely

References

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