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MALPEDIA_Win_Avrecon_Auto

autogenerated rule brought to you by yara-signator

MalwareAvreconMalpedia 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: Avrecon.

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

Summary generated from the rule's metadata and condition.

Rule source

win-avrecon-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Avrecon_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "eca3a971-f511-5ef2-89a0-7adb756955b0"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.avrecon"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.avrecon_auto.yar#L1-L127"
		license_url = "N/A"
		logic_hash = "a9e3b0d5f08e716474ed1f20e93ae72ff4e589fa38c1d5f2c68ac50a3376f653"
		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 = { 50 ff15???????? e9???????? 55 8bec 83ec54 53 }
		$sequence_1 = { 7411 8a0a 84c9 740b 380e 7507 46 }
		$sequence_2 = { 8d85c8fbffff 50 897548 c7455c00001000 e8???????? }
		$sequence_3 = { c645d600 c645d701 c645d500 ff15???????? 83f8ff 0f8454020000 8b3d???????? }
		$sequence_4 = { 741d 4e 4e 753c ff7554 8b757c }
		$sequence_5 = { 50 6880000000 57 ff7508 ffd6 6a04 8d45f8 }
		$sequence_6 = { 57 ff7558 ff756c e8???????? 85c0 7e61 }
		$sequence_7 = { 297558 eb03 897578 017564 }
		$sequence_8 = { 8bd8 3bdf 0f8e88010000 6a20 8d4524 50 e8???????? }
		$sequence_9 = { 57 c705????????01000000 ff15???????? 33c0 40 898584fbffff 898588fcffff }

	condition:
		7 of them and filesize < 360448
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 50 ff15???????? e9???????? 55 8bec 83ec54 53 }
$sequence_1hex{ 7411 8a0a 84c9 740b 380e 7507 46 }
$sequence_2hex{ 8d85c8fbffff 50 897548 c7455c00001000 e8???????? }
$sequence_3hex{ c645d600 c645d701 c645d500 ff15???????? 83f8ff 0f8454020000 8b3d???????? }
$sequence_4hex{ 741d 4e 4e 753c ff7554 8b757c }
$sequence_5hex{ 50 6880000000 57 ff7508 ffd6 6a04 8d45f8 }
$sequence_6hex{ 57 ff7558 ff756c e8???????? 85c0 7e61 }
$sequence_7hex{ 297558 eb03 897578 017564 }
$sequence_8hex{ 8bd8 3bdf 0f8e88010000 6a20 8d4524 50 e8???????? }
$sequence_9hex{ 57 c705????????01000000 ff15???????? 33c0 40 898584fbffff 898588fcffff }

Condition

7 of them and filesize < 360448

In plain words (Heuristic)

  • The file must be smaller than 360448 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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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: eca3a971-f511-5ef2-89a0-7adb756955b0

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