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YARA · ditekSHen detection

DITEKSHEN_INDICATOR_OLE_Metadatacmd

Detects OLE documents with Windows command-line utilities commands (certutil, powershell, etc.) stored in the metadata (author, last modified by, etc.).

Suspicious / huntingditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekSHen
Date
2020-11-06
Modified
2024-09-06
Score / Quality
75 / 75

What this rule detects

Detects OLE documents with Windows command-line utilities commands (certutil, powershell, etc.) stored in the metadata (author, last modified by, etc.).

It defines 6 patterns (0 text, 6 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
indicator-ole-metadatacmd.yarBSD 2-Clause License
rule DITEKSHEN_INDICATOR_OLE_Metadatacmd : FILE
{
	meta:
		description = "Detects OLE documents with Windows command-line utilities commands (certutil, powershell, etc.) stored in the metadata (author, last modified by, etc.)."
		author = "ditekSHen"
		id = "63b23630-b344-5fba-95f4-950d072beaff"
		date = "2020-11-06"
		modified = "2024-09-06"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/indicator_office.yar#L330-L349"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "0562d026a1ad4510310ebff5da154064f92afc7bf714973f7de362435476772c"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$cmd1 = { 00 1E 00 00 00 [1-4] 00 00 (63|43) (6D|4D) (64|44) (00|20) }
		$cmd2 = { 00 1E 00 00 00 [1-4] 00 00 (6D|4D) (73|53) (68|48) (74|54) (61|41) (00|20) }
		$cmd3 = { 00 1E 00 00 00 [1-4] 00 00 (77|57) (73|53) (63|43) (72|52) (69|49) (70|50) (74|54) (00|20) }
		$cmd4 = { 00 1E 00 00 00 [1-4] 00 00 (63|42) (65|45) (72|52) (74|54) (75|55) (74|54) (69|49) (6C|4C) (00|20) }
		$cmd5 = { 00 1E 00 00 00 [1-4] 00 00 (70|50) (6F|4F) (77|57) (65|45) (72|52) (73|43) (68|48) (65|45) (6C|4C) (6C|4C) (00|20) }
		$cmd6 = { 00 1E 00 00 00 [1-4] 00 00 (6E|4E) (65|45) (74|54) 2E (77|57) (65|45) (62|42) (63|43) (6C|4C) (69|49) (65|45) (6E|4E) (74|54) (00|20) }

	condition:
		uint16( 0 ) == 0xcfd0 and any of them
}

Strings (6 patterns)

IdentifierTypeValueModifiers
$cmd1hex{ 00 1E 00 00 00 [1-4] 00 00 (63|43) (6D|4D) (64|44) (00|20) }
$cmd2hex{ 00 1E 00 00 00 [1-4] 00 00 (6D|4D) (73|53) (68|48) (74|54) (61|41) (00|20) }
$cmd3hex{ 00 1E 00 00 00 [1-4] 00 00 (77|57) (73|53) (63|43) (72|52) (69|49) (70|50) (74|54) (00|20) }
$cmd4hex{ 00 1E 00 00 00 [1-4] 00 00 (63|42) (65|45) (72|52) (74|54) (75|55) (74|54) (69|49) (6C|4C) (00|20) }
$cmd5hex{ 00 1E 00 00 00 [1-4] 00 00 (70|50) (6F|4F) (77|57) (65|45) (72|52) (73|43) (68|48) (65|45) (6C|4C) (6C|4C) (00|20) }
$cmd6hex{ 00 1E 00 00 00 [1-4] 00 00 (6E|4E) (65|45) (74|54) 2E (77|57) (65|45) (62|42) (63|43) (6C|4C) (69|49) (65|45) (6E|4E) (74|54) (00|20) }

Condition

uint16( 0 ) == 0xcfd0 and any of them

In plain words (Heuristic)

  • At least one pattern in the rule must match.

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References

Licence & attribution

Author: ditekSHen

Source repository: ditekSHen detection @ e76c93dcde

Licence: BSD 2-Clause License (repository licence)

Copyright notice: Copyright 2021 by ditekSHen (https://github.com/ditekshen/detection).

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 63b23630-b344-5fba-95f4-950d072beaff

Tags:FILE

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