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SEKOIA_Tool_Multidump_Strings

Detects MultiDump

Hack toolSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2024-03-19
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detects MultiDump

Targets: Windows PE.

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

Summary generated from the rule's metadata and condition.

Rule source

tool-multidump-strings.yarDetection Rule License 1.1
rule SEKOIA_Tool_Multidump_Strings : FILE
{
	meta:
		description = "Detects MultiDump"
		author = "Sekoia.io"
		id = "4897c898-01dd-40d2-bf28-266231c88f8a"
		date = "2024-03-19"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/tool_multidump_strings.yar#L1-L22"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "8d98cf89d56f5a949023364f94c8d55f8875408b082fb52e118f99d46533124d"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "--nodump\tDisable LSASS dumping"
		$ = "-r 192.168.1.100:5000"
		$ = "Path to save procdump.exe"
		$ = "[!] CreateFileW [R] Failed With Error"
		$ = "LSASS is Running, Continuin"
		$ = "Dumping LSASS Using ProcDump"

	condition:
		uint16be( 0 ) == 0x4d5a and filesize < 1MB and 3 of them
}

Strings (6 patterns)

IdentifierTypeValueModifiers
$text"--nodump\tDisable LSASS dumping"
$text"-r 192.168.1.100:5000"
$text"Path to save procdump.exe"
$text"[!] CreateFileW [R] Failed With Error"
$text"LSASS is Running, Continuin"
$text"Dumping LSASS Using ProcDump"

Condition

uint16be( 0 ) == 0x4d5a and filesize < 1MB and 3 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • The file must be smaller than 1MB (a cheap guard that skips large files).
  • At least 3 patterns in the rule must match.

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References

Licence & attribution

Author: Sekoia.io

Source repository: SEKOIA.IO Community @ a438a5901a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

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

Rule id: 4897c898-01dd-40d2-bf28-266231c88f8a

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE