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MALPEDIA_Win_Rekoobew_Auto

autogenerated rule brought to you by yara-signator

MalwareRekoobewMalpedia 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: Rekoobew.

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

Summary generated from the rule's metadata and condition.

Rule source

win-rekoobew-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Rekoobew_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "8ee2b2ef-cb3c-5ded-93b0-251a94d316dc"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.rekoobew"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.rekoobew_auto.yar#L1-L130"
		license_url = "N/A"
		logic_hash = "611d5d6376ad3bfd0022c8516f8f73ea917b68256cff7e917d5134c7e5ac0c95"
		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 = { 29d8 89442408 89742404 8b4508 890424 e8???????? 85c0 }
		$sequence_1 = { c740241cb04000 8910 c7401898654000 c7401ca06a4000 c74020a86a4000 c74044b06a4000 }
		$sequence_2 = { 0f85c4020000 a1???????? 8945d8 a1???????? 8945dc a1???????? 8945e0 }
		$sequence_3 = { 8b47fc 8b3495e0984000 3377e0 0fb6d8 8b1c9de0944000 c1e308 31de }
		$sequence_4 = { 334dec d1c1 894dd8 8d8408a1ebd96e 8945f0 89d0 31f8 }
		$sequence_5 = { 884610 0fb7431a 884611 8b4318 c1e808 884612 }
		$sequence_6 = { c1ea10 0fb6d2 333495e0884000 0fb6d5 8b1495e08c4000 31f2 8955e8 }
		$sequence_7 = { 897dc8 8d9c3bdcbc1b8f 89d7 09cf 21c7 897d98 89d7 }
		$sequence_8 = { 8b7d08 8807 83c701 897d08 80f93d }
		$sequence_9 = { 89c2 c1ea08 8855f6 8845f7 c1e803 83e03f 83f837 }

	condition:
		7 of them and filesize < 248832
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 29d8 89442408 89742404 8b4508 890424 e8???????? 85c0 }
$sequence_1hex{ c740241cb04000 8910 c7401898654000 c7401ca06a4000 c74020a86a4000 c74044b06a4000 }
$sequence_2hex{ 0f85c4020000 a1???????? 8945d8 a1???????? 8945dc a1???????? 8945e0 }
$sequence_3hex{ 8b47fc 8b3495e0984000 3377e0 0fb6d8 8b1c9de0944000 c1e308 31de }
$sequence_4hex{ 334dec d1c1 894dd8 8d8408a1ebd96e 8945f0 89d0 31f8 }
$sequence_5hex{ 884610 0fb7431a 884611 8b4318 c1e808 884612 }
$sequence_6hex{ c1ea10 0fb6d2 333495e0884000 0fb6d5 8b1495e08c4000 31f2 8955e8 }
$sequence_7hex{ 897dc8 8d9c3bdcbc1b8f 89d7 09cf 21c7 897d98 89d7 }
$sequence_8hex{ 8b7d08 8807 83c701 897d08 80f93d }
$sequence_9hex{ 89c2 c1ea08 8855f6 8845f7 c1e803 83e03f 83f837 }

Condition

7 of them and filesize < 248832

In plain words (Heuristic)

  • The file must be smaller than 248832 (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: 8ee2b2ef-cb3c-5ded-93b0-251a94d316dc

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