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CAPE_Dridexloader_1

DridexLoader API Spam Bypass

GenericCAPE Sandbox (CAPEv2)GNU General Public License v3.0Compiles with YARA-X
Author
kevoreilly
Date
2021-03-09
Score / Quality
75 / 70

What this rule detects

DridexLoader API Spam Bypass

Targets: Windows PE.

It defines 1 patterns (0 text, 1 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
dridexloader-1.yarGNU General Public License v3.0
rule CAPE_Dridexloader_1 : FILE
{
	meta:
		description = "DridexLoader API Spam Bypass"
		author = "kevoreilly"
		id = "a8b62f64-87a0-58d3-8876-9b0f6a7deb97"
		date = "2021-03-09"
		modified = "2021-03-09"
		reference = "https://github.com/kevoreilly/CAPEv2"
		source_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/analyzer/windows/data/yara/DridexLoader.yar#L1-L11"
		license_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/LICENSE"
		logic_hash = "00a3e4e80a2558ee52035f091e2339fa2dad6f6515b9dc099f2f3800e4c70bce"
		score = 75
		quality = 70
		tags = "FILE"
		cape_options = "bp0=$trap-13,action0=ret,count=0"

	strings:
		$trap = {6A 50 6A 14 6A 03 5A 8D 4C 24 ?? E8 [4] 68 [4] 68 [4] E8 [4] 85 C0 74 05}

	condition:
		uint16( 0 ) == 0x5A4D and $trap
}

Strings (1 patterns)

IdentifierTypeValueModifiers
$traphex{6A 50 6A 14 6A 03 5A 8D 4C 24 ?? E8 [4] 68 [4] 68 [4] E8 [4] 85 C0 74 05}

Condition

uint16( 0 ) == 0x5A4D and $trap

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • Pattern $trap must be present.

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References

Licence & attribution

Author: kevoreilly

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: a8b62f64-87a0-58d3-8876-9b0f6a7deb97

Metadata

cape_optionsbp0=$trap-13,action0=ret,count=0

Tags:FILE

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