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EMBEERESEARCH_Win_Havoc_Djb2_Hashing_Routine_Oct_2022

No description has been set in the source file - EmbeeResearch

Hack toolHavocEmbee ResearchDetection Rule License 1.1Compiles with YARA-X
Author
embee_research @ HuntressLabs
Date
2022-10-11
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: Havoc.

Targets: Windows PE.

It defines 2 patterns (0 text, 2 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
win-havoc-djb2-hashing-routine-oct-2022.yarDetection Rule License 1.1
rule EMBEERESEARCH_Win_Havoc_Djb2_Hashing_Routine_Oct_2022 : FILE
{
	meta:
		description = "No description has been set in the source file - EmbeeResearch"
		author = "embee_research @ HuntressLabs"
		id = "cde3e14f-0671-5bcf-93e8-e0a0af9b462c"
		date = "2022-10-11"
		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/2022/win_havoc_djb2_hashing_routine_oct_2022.yar#L1-L24"
		license_url = "N/A"
		logic_hash = "9f645480c3d78153186a247440739a1d2e627ec64a4225083bd8db4ad9bd5ef3"
		score = 75
		quality = 75
		tags = "FILE"
		vendor = "Huntress Research"

	strings:
		$dll = {b8 05 15 00 00 0f be 11 48 ff c1 84 d2 74 07 6b c0 21 01 d0 eb ef}
		$shellcode = {41 80 f8 60 76 04 41 83 e8 20 6b c0 21 45 0f b6 c0 49 ff c1 44 01 c0 eb c4}

	condition:
		( any of them ) and ( uint16( 0 ) == 0x5a4d or uint16( 0 ) == 0x00e8 or uint16( 0 ) == 0x4856 )
}

Strings (2 patterns)

IdentifierTypeValueModifiers
$dllhex{b8 05 15 00 00 0f be 11 48 ff c1 84 d2 74 07 6b c0 21 01 d0 eb ef}
$shellcodehex{41 80 f8 60 76 04 41 83 e8 20 6b c0 21 45 0f b6 c0 49 ff c1 44 01 c0 eb c4}

Condition

( any of them ) and ( uint16( 0 ) == 0x5a4d or uint16( 0 ) == 0x00e8 or uint16( 0 ) == 0x4856 )

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least one pattern in the rule must match.

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References

Licence & attribution

Author: embee_research @ HuntressLabs

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: cde3e14f-0671-5bcf-93e8-e0a0af9b462c

Metadata

vendorHuntress Research

Tags:FILE

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