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YARA · CAPE Sandbox (CAPEv2)

CAPE_Aurastealerbypass

Bypass AuraStealer

MalwareAurastealerCAPE Sandbox (CAPEv2)GNU General Public License v3.0Compiles with YARA-X
Author
enzok
Date
2025-09-02
Score / Quality
75 / 70

What this rule detects

Bypass AuraStealer

Associated malware family: Aurastealer.

It defines 3 patterns (0 text, 3 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
aurastealerbypass.yarGNU General Public License v3.0
rule CAPE_Aurastealerbypass
{
	meta:
		description = "Bypass AuraStealer"
		author = "enzok"
		id = "e510f46b-de7c-50d1-bff3-97c3acf0452e"
		date = "2025-09-02"
		modified = "2025-09-02"
		reference = "https://github.com/kevoreilly/CAPEv2"
		source_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/analyzer/windows/data/yara/AuraStealer.yar#L1-L14"
		license_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/LICENSE"
		logic_hash = "ae174c96c262b1734c58bd6c5f7112221b08596c180612e4970acada35dbd070"
		score = 75
		quality = 70
		tags = ""
		cape_options = "bp0=$antivm1+3,action0=skip,count=0"
		packed = "a9c47f10d5eb77d7d6b356be00b4814a7c1e5bb75739b464beb6ea03fc36cc85"

	strings:
		$antivm1 = {39 04 11 0f 94 C3 8B 44 ?? ?? 85 C0}
		$conf = {8D BE ?? 00 00 00 68 00 40 00 00 5? 5? FF D1 83 C4 ?? 8B 07 8B 57 04 29 C2}
		$keyexpansion = {31 C0 8A 1C 82 88 1C 81 8A 5C 82 01 88 5C 81 01 8A 5C 82 02 88 5C 81 02 8A 5C 82 03 88 5C 81 03 4? 83 F8 08 75 ?? B? 08 00 00 00}

	condition:
		all of them
}

Strings (3 patterns)

IdentifierTypeValueModifiers
$antivm1hex{39 04 11 0f 94 C3 8B 44 ?? ?? 85 C0}
$confhex{8D BE ?? 00 00 00 68 00 40 00 00 5? 5? FF D1 83 C4 ?? 8B 07 8B 57 04 29 C2}
$keyexpansionhex{31 C0 8A 1C 82 88 1C 81 8A 5C 82 01 88 5C 81 01 8A 5C 82 02 88 5C 81 02 8A 5C 82 03 88 5C 81 03 4? 83 F8 08 75 ?? B? 08 00 00 00}

Condition

all of them

In plain words (Heuristic)

  • All patterns in the rule must match.

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References

Licence & attribution

Author: enzok

Source repository: CAPE Sandbox (CAPEv2) @ 6b15e76f28

Licence: GNU General Public License v3.0 (repository licence)

Copyright notice: Cuckoo Sandbox is copyrighted by the Cuckoo Foundation.

Original rule

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

Rule id: e510f46b-de7c-50d1-bff3-97c3acf0452e

Metadata

cape_optionsbp0=$antivm1+3,action0=skip,count=0
packeda9c47f10d5eb77d7d6b356be00b4814a7c1e5bb75739b464beb6ea03fc36cc85

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