Sigma rule: Console CodePage Lookup Via CHCP

Rule

Title

Console CodePage Lookup Via CHCP

Status

test

Level

medium

Author

_pete_0, TheDFIRReport

Date

2022-02-21

Modified

2024-03-05

File

rules/windows/process_creation/proc_creation_win_chcp_codepage_lookup.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects use of chcp to look up the system locale value as part of host discovery

Log source

product

windows

category

process_creation

Detection

selection:
    ParentImage|endswith: '\cmd.exe'
    ParentCommandLine|contains|windash:
        - ' -c '
        - ' -r '
        - ' -k '
    Image|endswith: '\chcp.com'
    CommandLine|endswith:
        - 'chcp'
        - 'chcp '
        - 'chcp  '
condition: selection

False positives (as the rule lists them)

• During Anaconda update the 'conda.exe' process will eventually execution the 'chcp' command.
• Discord was seen using chcp to look up code pages

Tags

• attack.discovery
• attack.t1614.001

MITRE ATT&CK ids this rule names

• T1614.001

References

• https://thedfirreport.com/2022/04/04/stolen-images-campaign-ends-in-conti-ransomware/
• https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/chcp

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_chcp_codepage_lookup.yml