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MALPEDIA_Win_Dnespy_Auto

autogenerated rule brought to you by yara-signator

MalwareDnespyMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Dnespy.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-dnespy-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Dnespy_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "6ad9df4c-5a33-513f-97c8-10355272b5e9"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.dnespy"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.dnespy_auto.yar#L1-L131"
		license_url = "N/A"
		logic_hash = "7122d179219cca1256e739bba538cf24826e3a3104c038607a1dcb344b5e9f45"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { 51 e8???????? 0f108558ddffff 83c408 }
		$sequence_1 = { e8???????? 8b956cffffff 8845a7 83fa10 722f 8b8d58ffffff 42 }
		$sequence_2 = { 894108 8bcb 8b4224 c1e908 89480c eb05 8bcb }
		$sequence_3 = { 8d420c 8b8a60e9ffff 33c8 e8???????? 8b4af8 33c8 e8???????? }
		$sequence_4 = { 8d4590 c645fc0b 50 8bcf e8???????? 8b55a4 83fa10 }
		$sequence_5 = { 8b5d08 895dd8 c745d400000000 c7431000000000 c743140f000000 c60300 c745fc00000000 }
		$sequence_6 = { 8b542414 83faff 0f83a0000000 8810 8bc5 0facc208 89542418 }
		$sequence_7 = { 8d45e0 50 e8???????? 6a00 68???????? 68???????? 6a00 }
		$sequence_8 = { 7711 7207 3dffff0000 7308 89442410 894c2424 6804040000 }
		$sequence_9 = { 5b 8be5 5d c20800 52 50 51 }

	condition:
		7 of them and filesize < 794624
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 51 e8???????? 0f108558ddffff 83c408 }
$sequence_1hex{ e8???????? 8b956cffffff 8845a7 83fa10 722f 8b8d58ffffff 42 }
$sequence_2hex{ 894108 8bcb 8b4224 c1e908 89480c eb05 8bcb }
$sequence_3hex{ 8d420c 8b8a60e9ffff 33c8 e8???????? 8b4af8 33c8 e8???????? }
$sequence_4hex{ 8d4590 c645fc0b 50 8bcf e8???????? 8b55a4 83fa10 }
$sequence_5hex{ 8b5d08 895dd8 c745d400000000 c7431000000000 c743140f000000 c60300 c745fc00000000 }
$sequence_6hex{ 8b542414 83faff 0f83a0000000 8810 8bc5 0facc208 89542418 }
$sequence_7hex{ 8d45e0 50 e8???????? 6a00 68???????? 68???????? 6a00 }
$sequence_8hex{ 7711 7207 3dffff0000 7308 89442410 894c2424 6804040000 }
$sequence_9hex{ 5b 8be5 5d c20800 52 50 51 }

Condition

7 of them and filesize < 794624

In plain words (Heuristic)

  • The file must be smaller than 794624 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

References

Licence & attribution

Author: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

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

Rule id: 6ad9df4c-5a33-513f-97c8-10355272b5e9

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE