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MALPEDIA_Win_Strelastealer_Auto

autogenerated rule brought to you by yara-signator

MalwareStrelastealerMalpedia 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: Strelastealer.

It defines 24 patterns (0 text, 24 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-strelastealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Strelastealer_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "f7b662d9-32bf-5367-8f26-500397b392d0"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.strelastealer"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.strelastealer_auto.yar#L1-L234"
		license_url = "N/A"
		logic_hash = "83930b7a5402aa3096931fe0543dd89c5f32753ef96995a5e84b10a064c89883"
		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 = { 385e02 740b 8b7c2424 8bde e8???????? 56 }
		$sequence_1 = { 4533c9 4c89a424d0050000 ba00000080 4533e4 4c89b424c8050000 }
		$sequence_2 = { 01c1 b8dc8856d3 29c8 b9dd8856d3 }
		$sequence_3 = { 01c7 897d14 8d1401 81c200040000 }
		$sequence_4 = { 895128 488d0d87a30000 488b45d8 488908 488d0d892f0100 488b45d8 8990a8030000 }
		$sequence_5 = { 08c1 0f1f440000 b810000000 e8???????? }
		$sequence_6 = { e8???????? 8b4de4 83c40c 6bc930 8975e0 8db128b90010 8975e4 }
		$sequence_7 = { 488b8888000000 488d053d110100 483bc8 7405 e8???????? c70301000000 488b85a0010000 }
		$sequence_8 = { 08c1 08d3 89ca 80e201 }
		$sequence_9 = { 68???????? ff15???????? 6a05 8bf8 e8???????? 8b15???????? }
		$sequence_10 = { 08c1 08da 80f201 89c8 }
		$sequence_11 = { 015304 eb55 4d85c0 7e27 488bd7 4c8b4dc7 4b8b8ccbc0120600 }
		$sequence_12 = { 4883ec20 8bd9 4c8d0d2de10000 b901000000 4c8d0519e10000 488d151ae10000 }
		$sequence_13 = { 56 e8???????? 83c414 8b45fc ff34c5acb20010 53 }
		$sequence_14 = { 08c1 20ca 80f101 89c8 }
		$sequence_15 = { e8???????? 8b15???????? 83c404 8bf0 52 }
		$sequence_16 = { 4e0fbeac18d0a80100 418d4d01 4c8b459f 4c2bc6 }
		$sequence_17 = { 4c8d052fcc0000 83e23f 488bcf 48c1f906 488d14d2 498b0cc8 c644d13800 }
		$sequence_18 = { 4883611000 488d056cc50000 48894108 488d0551c50000 488901 }
		$sequence_19 = { 53 53 53 8d4c245c 51 8b4c242c 8d942494050000 }
		$sequence_20 = { ff15???????? 8b442434 8b4c2438 53 53 }
		$sequence_21 = { 53 6804010000 8d94247c030000 52 50 }
		$sequence_22 = { 03c7 751f 488b85a0010000 488b8888000000 488d0505540100 }
		$sequence_23 = { ff15???????? 448b4c2478 488d85c0010000 4c8b4580 }

	condition:
		7 of them and filesize < 872448
}

Strings (24 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 385e02 740b 8b7c2424 8bde e8???????? 56 }
$sequence_1hex{ 4533c9 4c89a424d0050000 ba00000080 4533e4 4c89b424c8050000 }
$sequence_2hex{ 01c1 b8dc8856d3 29c8 b9dd8856d3 }
$sequence_3hex{ 01c7 897d14 8d1401 81c200040000 }
$sequence_4hex{ 895128 488d0d87a30000 488b45d8 488908 488d0d892f0100 488b45d8 8990a8030000 }
$sequence_5hex{ 08c1 0f1f440000 b810000000 e8???????? }
$sequence_6hex{ e8???????? 8b4de4 83c40c 6bc930 8975e0 8db128b90010 8975e4 }
$sequence_7hex{ 488b8888000000 488d053d110100 483bc8 7405 e8???????? c70301000000 488b85a0010000 }
$sequence_8hex{ 08c1 08d3 89ca 80e201 }
$sequence_9hex{ 68???????? ff15???????? 6a05 8bf8 e8???????? 8b15???????? }
$sequence_10hex{ 08c1 08da 80f201 89c8 }
$sequence_11hex{ 015304 eb55 4d85c0 7e27 488bd7 4c8b4dc7 4b8b8ccbc0120600 }
$sequence_12hex{ 4883ec20 8bd9 4c8d0d2de10000 b901000000 4c8d0519e10000 488d151ae10000 }
$sequence_13hex{ 56 e8???????? 83c414 8b45fc ff34c5acb20010 53 }
$sequence_14hex{ 08c1 20ca 80f101 89c8 }
$sequence_15hex{ e8???????? 8b15???????? 83c404 8bf0 52 }
$sequence_16hex{ 4e0fbeac18d0a80100 418d4d01 4c8b459f 4c2bc6 }
$sequence_17hex{ 4c8d052fcc0000 83e23f 488bcf 48c1f906 488d14d2 498b0cc8 c644d13800 }
$sequence_18hex{ 4883611000 488d056cc50000 48894108 488d0551c50000 488901 }
$sequence_19hex{ 53 53 53 8d4c245c 51 8b4c242c 8d942494050000 }
$sequence_20hex{ ff15???????? 8b442434 8b4c2438 53 53 }
$sequence_21hex{ 53 6804010000 8d94247c030000 52 50 }
$sequence_22hex{ 03c7 751f 488b85a0010000 488b8888000000 488d0505540100 }
$sequence_23hex{ ff15???????? 448b4c2478 488d85c0010000 4c8b4580 }

Condition

7 of them and filesize < 872448

In plain words (Heuristic)

  • The file must be smaller than 872448 (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: f7b662d9-32bf-5367-8f26-500397b392d0

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