Suspicious Response File Execution Via Odbcconf.EXE

Severity: high
Author: Nasreddine Bencherchali (Nextron Systems)
Source: upstream

Detects execution of "odbcconf" with the "-f" flag in order to load a response file with a non-".rsp" extension.

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1218.008` System Binary Proxy Execution: Odbcconf

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `all of selection_img`

or:
Image|endswith: '\odbcconf.exe'
OriginalFileName: odbcconf.exe

Stage 2: `all of selection_cli`

CommandLine|contains: ' -f '

Stage 3: `not 1 of filter_main_*`

or:
CommandLine|contains: '.exe /E /F "C:\WINDOWS\system32\odbcconf.tmp"'
Image: 'C:\Windows\System32\odbcconf.exe'
ParentImage: 'C:\Windows\System32\runonce.exe'
CommandLine|contains: .rsp

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.

Field	Kind	Values
`CommandLine`	match	`-f` corpus 5 (sigma 5) `.exe /E /F "C:\WINDOWS\system32\odbcconf.tmp"` `.rsp` corpus 2 (sigma 2)
`Image`	ends_with	`\odbcconf.exe` corpus 11 (sigma 11)
`Image`	eq	`C:\Windows\System32\odbcconf.exe`
`OriginalFileName`	eq	`odbcconf.exe` corpus 9 (sigma 9)
`ParentImage`	eq	`C:\Windows\System32\runonce.exe`