Suspicious DumpMinitool Execution

Severity: high
Author: Florian Roth (Nextron Systems)
Source: upstream

Detects suspicious ways to use the "DumpMinitool.exe" binary

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1036` Masquerading
Credential Access	`T1003.001` OS Credential Dumping: LSASS Memory

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `selection`

or:
Image|endswith: '\DumpMinitool.arm64.exe'
Image|endswith: '\DumpMinitool.exe'
Image|endswith: '\DumpMinitool.x86.exe'
OriginalFileName: DumpMinitool.arm64.exe
OriginalFileName: DumpMinitool.exe
OriginalFileName: DumpMinitool.x86.exe

Stage 2: `not filter_folder`

or:
Image|contains: '\Extensions\'
Image|contains: '\Microsoft Visual Studio\'

Stage 3: `susp_flags`

CommandLine|contains: .txt

Stage 4: `cmd_has_flags`

or:
CommandLine|contains: ' Full'
CommandLine|contains: ' Mini'
CommandLine|contains: ' WithHeap'

Stage 5: `not filter_cmd_misses_flags`

CommandLine|contains: --dumpType

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	`Full` corpus 2 (sigma 2) `Mini` corpus 2 (sigma 2) `WithHeap` corpus 2 (sigma 2) `--dumpType` `.txt` corpus 7 (sigma 7)
`Image`	ends_with	`\DumpMinitool.arm64.exe` corpus 2 (sigma 2) `\DumpMinitool.exe` corpus 2 (sigma 2) `\DumpMinitool.x86.exe` corpus 2 (sigma 2)
`Image`	match	`\Extensions\` `\Microsoft Visual Studio\` corpus 2 (sigma 2)
`OriginalFileName`	eq	`DumpMinitool.arm64.exe` corpus 2 (sigma 2) `DumpMinitool.exe` corpus 2 (sigma 2) `DumpMinitool.x86.exe` corpus 2 (sigma 2)

Suspicious DumpMinitool Execution

MITRE ATT&CK coverage

Event coverage

Stages and Predicates

Stage 1: selection

Stage 2: not filter_folder

Stage 3: susp_flags