Detection rules › Sigma

Use of W32tm as Timer

Severity
high
Author
frack113
Source
upstream

When configured with suitable command line arguments, w32tm can act as a delay mechanism

MITRE ATT&CK coverage

TacticTechniques
DiscoveryT1124 System Time Discovery

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: all of selection_w32tm

or:
Image|endswith: '\w32tm.exe'
OriginalFileName: w32time.dll

Stage 2: all of selection_cmd

CommandLine|contains: '/computer:'
CommandLine|contains: '/dataonly'
CommandLine|contains: '/period:'
CommandLine|contains: '/samples:'
CommandLine|contains: '/stripchart'

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.

FieldKindValues
CommandLinematch
  • /computer:
  • /dataonly
  • /period:
  • /samples:
  • /stripchart
Imageends_with
  • \w32tm.exe corpus 2 (sigma 2)
OriginalFileNameeq
  • w32time.dll