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SEKOIA_Loader_Win_Dodgebox

Detect the DodgeBox malware using several criteria

MalwareSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X (with warnings)
Author
Sekoia.io
Date
2024-07-15
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detect the DodgeBox malware using several criteria

Targets: Windows PE.

It has no patterns: the condition alone decides (modules, file properties or other rules). YARA modules used: pe, hash.

YARA-X says: warning[deprecated_field]: field `number_of_sections` is deprecated

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

Includes the imports needed to compile it on its own.

loader-win-dodgebox.yarDetection Rule License 1.1
import "pe"
import "hash"

rule SEKOIA_Loader_Win_Dodgebox
{
	meta:
		description = "Detect the DodgeBox malware using several criteria"
		author = "Sekoia.io"
		id = "8d5f94f3-1add-4f34-ba9e-f8f576c4e5b8"
		date = "2024-07-15"
		modified = "2024-12-19"
		reference = "https://www.zscaler.com/blogs/security-research/dodgebox-deep-dive-updated-arsenal-apt41-part-1"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/loader_win_dodgebox.yar#L4-L29"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		hash = "c6a3a1ea84251aed908702a1f2a565496d583239c5f467f5dcd0cfc5bfb1a6db"
		hash = "33fd050760e251ab932e5ca4311b494ef72cee157b20537ce773420845302e49"
		logic_hash = "e859da15a065454d273c4040b4e3409c3046cbcee135497bdcce6cff620c3cfb"
		score = 75
		quality = 80
		tags = ""
		version = "1.0"
		classification = "TLP:CLEAR"

	condition:
		pe.imphash( ) == "aeea1135af87e6b6b23fa7da995967ea" or hash.md5 ( pe.rich_signature.clear_data ) == "1c850cf955b35f60ee6c12d01161d95d" or for any i in ( 0 .. pe.number_of_sections -1 ) : ( hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "4a80edcce2a5ac85c3f849172ee89c0f" or hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "53781057440f51882c38d3a9ef611775" or hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "801b286d84a97fe919721843ab77210d" )
}

Condition

pe.imphash( ) == "aeea1135af87e6b6b23fa7da995967ea" or hash.md5 ( pe.rich_signature.clear_data ) == "1c850cf955b35f60ee6c12d01161d95d" or for any i in ( 0 .. pe.number_of_sections -1 ) : ( hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "4a80edcce2a5ac85c3f849172ee89c0f" or hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "53781057440f51882c38d3a9ef611775" or hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "801b286d84a97fe919721843ab77210d" )

In plain words (Heuristic)

  • A for-loop checks a property over several matches or items.
  • Uses the pe module.
  • Uses the hash module.
  • Compares a hash of the file or a part of it.
  • Checks the PE import hash (imphash).
  • Checks PE sections (names, count or properties).

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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).

  • c6a3a1ea84251aed908702a1f2a565496d583239c5f467f5dcd0cfc5bfb1a6db
  • 33fd050760e251ab932e5ca4311b494ef72cee157b20537ce773420845302e49

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: 8d5f94f3-1add-4f34-ba9e-f8f576c4e5b8

Metadata

version1.0
classificationTLP:CLEAR

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