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YARA · SEKOIA.IO Community

SEKOIA_Infostealer_Win_Edgeguard

Finds EdgeGuard Stealer samples based on specific strings

MalwareSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2023-08-22
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Finds EdgeGuard Stealer samples based on specific strings

Targets: Windows PE.

It defines 18 patterns (18 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

infostealer-win-edgeguard.yarDetection Rule License 1.1
rule SEKOIA_Infostealer_Win_Edgeguard : FILE
{
	meta:
		description = "Finds EdgeGuard Stealer samples based on specific strings"
		author = "Sekoia.io"
		id = "bbdb362f-d235-48f8-8fa5-d340d4e3e3f0"
		date = "2023-08-22"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/infostealer_win_edgeguard.yar#L1-L32"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "11396aea2e166456ec8311f95a8037aac41f69caf3158f8c19cb0c38327842d6"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$str01 = "main.downloadnecessary" ascii
		$str02 = "main.extractchromepasswords" ascii
		$str03 = "main.extracttasksch" ascii
		$str04 = "main.BrowserDownloadsViewExtract" ascii
		$str05 = "main.stealmetamask" ascii
		$str06 = "main.stealexoduswallet" ascii
		$str07 = "main.moveatomic" ascii
		$str08 = "main.movefirefoxcookies" ascii
		$str09 = "main.movepasswords" ascii
		$str10 = "main.FinallyZIPIPFolder" ascii
		$str11 = "edgeguard.business" ascii
		$str12 = "/License.XenArmor" ascii
		$str13 = "/TaskSchedulerView.exe" ascii
		$str14 = "/BrowsingHistoryView.exe" ascii
		$str15 = "/outlookfiles/starter.exe" ascii
		$str16 = "/outlookfiles/External.zip" ascii
		$str17 = "/outlookfiles/XenManager.dll" ascii
		$str18 = "/outlookfiles/EmailPasswordRecoveryPro.exe" ascii

	condition:
		uint16( 0 ) == 0x5a4d and 10 of ( $str* )
}

Strings (18 patterns)

IdentifierTypeValueModifiers
$str01text"main.downloadnecessary"ascii
$str02text"main.extractchromepasswords"ascii
$str03text"main.extracttasksch"ascii
$str04text"main.BrowserDownloadsViewExtract"ascii
$str05text"main.stealmetamask"ascii
$str06text"main.stealexoduswallet"ascii
$str07text"main.moveatomic"ascii
$str08text"main.movefirefoxcookies"ascii
$str09text"main.movepasswords"ascii
$str10text"main.FinallyZIPIPFolder"ascii
$str11text"edgeguard.business"ascii
$str12text"/License.XenArmor"ascii
$str13text"/TaskSchedulerView.exe"ascii
$str14text"/BrowsingHistoryView.exe"ascii
$str15text"/outlookfiles/starter.exe"ascii
$str16text"/outlookfiles/External.zip"ascii
$str17text"/outlookfiles/XenManager.dll"ascii
$str18text"/outlookfiles/EmailPasswordRecoveryPro.exe"ascii

Condition

uint16( 0 ) == 0x5a4d and 10 of ( $str* )

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 10 patterns in ( $str* ) 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: bbdb362f-d235-48f8-8fa5-d340d4e3e3f0

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE