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EMBEERESEARCH_Win_Icedid_Snowloader_Bytecodes_Oct_2023

No description has been set in the source file - EmbeeResearch

MalwareIcedidEmbee ResearchDetection Rule License 1.1Compiles with YARA-X
Author
Matthew @ Embee_Research
Date
2023-08-27
Modified
2023-10-18
Score / Quality
75 / 75

What this rule detects

No description has been set in the source file - EmbeeResearch

Associated malware family: Icedid.

Targets: Windows PE.

It defines 3 patterns (0 text, 3 hex, 0 regex). YARA modules used: pe.

Summary generated from the rule's metadata and condition.

Rule source

Includes the imports needed to compile it on its own.

win-icedid-snowloader-bytecodes-oct-2023.yarDetection Rule License 1.1
import "pe"

rule EMBEERESEARCH_Win_Icedid_Snowloader_Bytecodes_Oct_2023
{
	meta:
		description = "No description has been set in the source file - EmbeeResearch"
		author = "Matthew @ Embee_Research"
		id = "ad5d7bf5-813d-519d-91ae-e6a69fd557df"
		date = "2023-08-27"
		modified = "2023-10-18"
		reference = "https://github.com/embee-research/Yara-detection-rules/"
		source_url = "https://github.com/embee-research/Yara-detection-rules//blob/ac56d6f6fd2a30c8cb6e5c0455d6519210a8b0f4/Rules/win_icedid_snowloader_bytecodes_oct_2023.yar#L2-L23"
		license_url = "N/A"
		hash = "e096de90f65ff83ed0e929b330aa765a8e2322625325fb042775bff1748467cc"
		hash = "e87928fcddf13935c91a0b5577e28efd29bb6a5c1d98e5129dec63e231601053"
		hash = "82a01607ebdcaa73b9ff201ccb76780ad8de4a99dd3df026dcb71b0f007456ed"
		logic_hash = "5baa308ce130cbbe80f94fc127b083f26ae87552910c2bc6f3bae3008cf1aa63"
		score = 75
		quality = 75
		tags = ""

	strings:
		$s_1 = {4c 77 26 07}
		$s_2 = {58 a4 53 e5}
		$s_3 = {10 e1 8a c3}

	condition:
		( all of ( $s* ) ) and pe.number_of_exports > 20
}

Strings (3 patterns)

IdentifierTypeValueModifiers
$s_1hex{4c 77 26 07}
$s_2hex{58 a4 53 e5}
$s_3hex{10 e1 8a c3}

Condition

( all of ( $s* ) ) and pe.number_of_exports > 20

In plain words (Heuristic)

  • All patterns in ( $s* ) must match.
  • Uses the pe module.
  • Checks exported functions or the DLL name.

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References

Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

  • e096de90f65ff83ed0e929b330aa765a8e2322625325fb042775bff1748467cc
  • e87928fcddf13935c91a0b5577e28efd29bb6a5c1d98e5129dec63e231601053
  • 82a01607ebdcaa73b9ff201ccb76780ad8de4a99dd3df026dcb71b0f007456ed

Licence & attribution

Author: Matthew @ Embee_Research

Source repository: Embee Research @ ac56d6f6fd

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: ad5d7bf5-813d-519d-91ae-e6a69fd557df

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