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Detection rules › Sigma

CVE-2021-44077 POC Default Dropped File

Status
test
Severity
high
Log source
product windows, category file_event
Author
Nasreddine Bencherchali (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects the creation of "msiexec.exe" in the "bin" directory of the ManageEngine SupportCenter Plus (Related to CVE-2021-44077) and public POC available (See references section)

MITRE ATT&CK coverage

TacticTechniques
ExecutionNo specific technique

Event coverage

ProviderEventTitle
SysmonEvent ID 11FileCreate

Rule body yaml

title: CVE-2021-44077 POC Default Dropped File
id: 7b501acf-fa98-4272-aa39-194f82edc8a3
status: test
description: Detects the creation of "msiexec.exe" in the "bin" directory of the ManageEngine SupportCenter Plus (Related to CVE-2021-44077) and public POC available (See references section)
references:
    - https://thedfirreport.com/2022/06/06/will-the-real-msiexec-please-stand-up-exploit-leads-to-data-exfiltration/
    - https://github.com/horizon3ai/CVE-2021-44077/blob/b7a48e25824e8ead95e028475c7fd0e107e6e6bf/exploit.py
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-06-06
tags:
    - attack.execution
    - cve.2021-44077
    - detection.emerging-threats
logsource:
    category: file_event
    product: windows
detection:
    selection:
        TargetFilename|endswith: '\ManageEngine\SupportCenterPlus\bin\msiexec.exe'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    TargetFilename|endswith: '\ManageEngine\SupportCenterPlus\bin\msiexec.exe'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
TargetFilenameends_with
  • \ManageEngine\SupportCenterPlus\bin\msiexec.exe