Detection rules › Sigma
Copy .DMP/.DUMP Files From Remote Share Via Cmd.EXE
Detects usage of the copy builtin cmd command to copy files with the ".dmp"/".dump" extension from a remote share
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Credential Access | No specific technique |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
Rule body
title: Copy .DMP/.DUMP Files From Remote Share Via Cmd.EXE
id: 044ba588-dff4-4918-9808-3f95e8160606
status: test
description: Detects usage of the copy builtin cmd command to copy files with the ".dmp"/".dump" extension from a remote share
references:
- https://thedfirreport.com/2022/09/26/bumblebee-round-two/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-09-27
modified: 2023-09-12
tags:
- attack.credential-access
logsource:
category: process_creation
product: windows
detection:
# Example: copy \\<host>\\<folder>\\process.dmp C:\Users\process.dmp
selection_img:
- Image|endswith: '\cmd.exe'
- OriginalFileName: 'Cmd.Exe'
selection_cli:
CommandLine|contains|all:
- 'copy '
- ' \\\\'
CommandLine|contains:
- '.dmp'
- '.dump'
- '.hdmp'
condition: all of selection_*
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
all of selection_*Stage 1: selection_img
selection_img:
- Image|endswith: '\cmd.exe'
- OriginalFileName: 'Cmd.Exe'
Stage 2: selection_cli
selection_cli:
CommandLine|contains|all:
- 'copy '
- ' \\\\'
CommandLine|contains:
- '.dmp'
- '.dump'
- '.hdmp'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match |
Image | ends_with |
| field:"Image" kind:ends_with value:"\cmd.exe" |
OriginalFileName | eq |
| field:"OriginalFileName" kind:eq value:"Cmd.Exe" |