Threat Huntlowtest
CodePage Modification Via MODE.COM
Detects a CodePage modification using the "mode.com" utility. This behavior has been used by threat actors behind Dharma ransomware.
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Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.
Launch
Nasreddine Bencherchali (Nextron Systems), Joseliyo SanchezCreated Fri Jan 19d48c5ffa-3b02-4c0f-9a9e-3c275650dd0ewindows
Hunting Hypothesis
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic2 selectors
detection:
selection_img:
- Image|endswith: '\mode.com'
- OriginalFileName: 'MODE.COM'
selection_cli:
CommandLine|contains|all:
- ' con '
- ' cp '
- ' select='
condition: all of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Rule Metadata
Rule ID
d48c5ffa-3b02-4c0f-9a9e-3c275650dd0e
Status
test
Level
low
Type
Threat Hunt
Created
Fri Jan 19
Path
rules-threat-hunting/windows/process_creation/proc_creation_win_mode_codepage_change.yml
Raw Tags
attack.defense-evasionattack.t1036detection.threat-hunting