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MALPEDIA_Win_Retefe_Auto

autogenerated rule brought to you by yara-signator

MalwareRetefeMalpedia 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 / 73

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Retefe.

It defines 30 patterns (0 text, 30 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-retefe-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Retefe_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "31200cc7-03b1-55f5-b69b-b9e36950bf28"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.retefe"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.retefe_auto.yar#L1-L276"
		license_url = "N/A"
		logic_hash = "5b3eefe7ca9a8548d99314574f752a7999d6bd3b917149311736d19204ce71ad"
		score = 75
		quality = 73
		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 8bf8 ffd6 85c0 }
		$sequence_1 = { 68f5000000 50 ff15???????? b801000000 }
		$sequence_2 = { 6a3b 6a95 6ae7 6a07 6a22 }
		$sequence_3 = { 6a90 6a19 6ad6 6a2c 6ad3 6a13 }
		$sequence_4 = { 50 8b4204 ffd0 8b85e8efffff 6a00 8d8ddcefffff 51 }
		$sequence_5 = { 894604 83c404 8bc6 e8???????? }
		$sequence_6 = { 8b450c 3978fc 7e10 8b40f4 }
		$sequence_7 = { 6adb 6a52 6af1 6a72 6a8a 6a3f }
		$sequence_8 = { 6a17 6a31 6a1b 6a24 6a5a 6a3d }
		$sequence_9 = { e8???????? 6a08 e8???????? 894604 83c404 }
		$sequence_10 = { 52 e8???????? 8b4e04 8901 }
		$sequence_11 = { 8b4e04 40 3b4104 72ec }
		$sequence_12 = { 8b4e04 8901 8b4e04 33c0 83c404 }
		$sequence_13 = { 50 e8???????? 88043e 46 83c404 3bf3 75ec }
		$sequence_14 = { 668908 8d85c4efffff bf???????? 50 }
		$sequence_15 = { c745fcffffffff 8935???????? 8b06 51 8bfc }
		$sequence_16 = { e8???????? 83a6a0bf420000 59 83c604 81fe00020000 72dd b001 }
		$sequence_17 = { 756e 85d2 756a 8b3d???????? 8db7ff1f0000 }
		$sequence_18 = { 83c001 89442414 0f8429010000 55 }
		$sequence_19 = { 8d442410 50 ffd3 8b450c 2dd0070000 }
		$sequence_20 = { 894c243c 8d48fd 83e10f 8d7007 }
		$sequence_21 = { c70021000000 e9???????? 894ddc c745e008344100 e9???????? c745e004344100 }
		$sequence_22 = { 40 83f81d 7cf1 eb07 8b0cc5fc3c4100 }
		$sequence_23 = { 6bf030 03348da0bf4200 837e18ff 740c 837e18fe 7406 }
		$sequence_24 = { f2c3 f2e953070000 53 56 57 6a00 68a00f0000 }
		$sequence_25 = { 8364240400 56 57 8b7c2418 57 }
		$sequence_26 = { 8bfe e9???????? 33db 33c0 }
		$sequence_27 = { 0f87ed010000 ff24855c664000 ff36 68???????? 6a00 }
		$sequence_28 = { 56 e8???????? 85c0 0f8425ffffff 56 }
		$sequence_29 = { 83e03f c1ff06 6bd830 8b04bda0bf4200 }

	condition:
		7 of them and filesize < 843776
}

Strings (30 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 51 8bf8 ffd6 85c0 }
$sequence_1hex{ 68f5000000 50 ff15???????? b801000000 }
$sequence_2hex{ 6a3b 6a95 6ae7 6a07 6a22 }
$sequence_3hex{ 6a90 6a19 6ad6 6a2c 6ad3 6a13 }
$sequence_4hex{ 50 8b4204 ffd0 8b85e8efffff 6a00 8d8ddcefffff 51 }
$sequence_5hex{ 894604 83c404 8bc6 e8???????? }
$sequence_6hex{ 8b450c 3978fc 7e10 8b40f4 }
$sequence_7hex{ 6adb 6a52 6af1 6a72 6a8a 6a3f }
$sequence_8hex{ 6a17 6a31 6a1b 6a24 6a5a 6a3d }
$sequence_9hex{ e8???????? 6a08 e8???????? 894604 83c404 }
$sequence_10hex{ 52 e8???????? 8b4e04 8901 }
$sequence_11hex{ 8b4e04 40 3b4104 72ec }
$sequence_12hex{ 8b4e04 8901 8b4e04 33c0 83c404 }
$sequence_13hex{ 50 e8???????? 88043e 46 83c404 3bf3 75ec }
$sequence_14hex{ 668908 8d85c4efffff bf???????? 50 }
$sequence_15hex{ c745fcffffffff 8935???????? 8b06 51 8bfc }
$sequence_16hex{ e8???????? 83a6a0bf420000 59 83c604 81fe00020000 72dd b001 }
$sequence_17hex{ 756e 85d2 756a 8b3d???????? 8db7ff1f0000 }
$sequence_18hex{ 83c001 89442414 0f8429010000 55 }
$sequence_19hex{ 8d442410 50 ffd3 8b450c 2dd0070000 }
$sequence_20hex{ 894c243c 8d48fd 83e10f 8d7007 }
$sequence_21hex{ c70021000000 e9???????? 894ddc c745e008344100 e9???????? c745e004344100 }
$sequence_22hex{ 40 83f81d 7cf1 eb07 8b0cc5fc3c4100 }
$sequence_23hex{ 6bf030 03348da0bf4200 837e18ff 740c 837e18fe 7406 }
$sequence_24hex{ f2c3 f2e953070000 53 56 57 6a00 68a00f0000 }
$sequence_25hex{ 8364240400 56 57 8b7c2418 57 }
$sequence_26hex{ 8bfe e9???????? 33db 33c0 }
$sequence_27hex{ 0f87ed010000 ff24855c664000 ff36 68???????? 6a00 }
$sequence_28hex{ 56 e8???????? 85c0 0f8425ffffff 56 }
$sequence_29hex{ 83e03f c1ff06 6bd830 8b04bda0bf4200 }

Condition

7 of them and filesize < 843776

In plain words (Heuristic)

  • The file must be smaller than 843776 (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: 31200cc7-03b1-55f5-b69b-b9e36950bf28

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