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Microsoft-Windows-Sysmon › Event 27

Event ID 27 — FileBlockExecutable

Provider
Microsoft-Windows-Sysmon
Channel
Operational
Level
Informational
Task
File Block Executable (rule: FileBlockExecutable)
Opcode
Info

Description

This event is generated when Sysmon detects and blocks the creation of executable files.

Message #

File Block Executable:
RuleName: %1
UtcTime: %2
ProcessGuid: %3
ProcessId: %4
User: %5
Image: %6
TargetFilename: %7
Hashes: %8

Fields #

NameDescription
RuleName UnicodeString → string—
UtcTime UnicodeString → string—
ProcessGuid GUID → GUID—
ProcessId UInt32 → PID—
User UnicodeString → string—
Image UnicodeString → string—
TargetFilename UnicodeString → string—
Hashes UnicodeString → string—

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Sysmon",
    "guid": "5770385F-C22A-43E0-BF4C-06F5698FFBD9",
    "event_source_name": "",
    "event_id": 27,
    "version": 5,
    "level": 4,
    "task": 27,
    "opcode": 0,
    "keywords": 9223372036854775808,
    "time_created": "2022-08-29T04:43:48.128507Z",
    "event_record_id": 1341,
    "correlation": {},
    "execution": {
      "process_id": 2060,
      "thread_id": 7132
    },
    "channel": "Microsoft-Windows-Sysmon/Operational",
    "computer": "DESKTOP-VQBONAV",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {
    "RuleName": "ImageBlock",
    "UtcTime": "2022-08-29 04:43:48.117",
    "ProcessGuid": "3E153517-4404-630C-0003-000000000400",
    "ProcessId": 8636,
    "User": "DESKTOP-VQBONAV\\user",
    "Image": "C:\\Windows\\system32\\certutil.exe",
    "TargetFilename": "C:\\Users\\user\\AppData\\LocalLow\\Microsoft\\CryptnetUrlCache\\Content\\02E7958E9A9619FDA0A027756E601291",
    "Hashes": "MD5=E112A827FAB9F8378C76040187A6F336,SHA256=ED369187681A62247E38D930320F1CD771756D0B7B67072D8EC655EF99E14AEB,IMPHASH=8EEAA9499666119D13B3F44ECD77A729"
  }
}

Detection Rules #

View all rules referencing this event →

Sigma # view in reference

References #