YARA · Malpedia signator rules
MALPEDIA_Win_Spedear_Auto
autogenerated rule brought to you by yara-signator
- Author
- Felix Bilstein - yara-signator at cocacoding dot com
- Date
- 2026-05-04
- Modified
- 2026-05-18
- Score / Quality
- 75 / 71
What this rule detects
autogenerated rule brought to you by yara-signator
Associated malware family: Spedear.
It defines 27 patterns (0 text, 27 hex, 0 regex).
YARA-X says: warning[text_as_hex]: hex pattern could be written as text literal
Summary generated from the rule's metadata and condition.
Rule source
rule MALPEDIA_Win_Spedear_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "bc74395a-f867-5375-b1a4-3194ab3faef7"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.spedear"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.spedear_auto.yar#L1-L258"
= "N/A"
= "8ad71d71fef6d799b3c4103e4255891e4d1c676677fc2e42c68cbbb5bc612621"
= 75
= 71
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "TLP:WHITE"
strings:
$sequence_0 = { 99 83e207 03c2 c1f803 83c40c }
$sequence_1 = { 8b4718 8a5f06 50 894608 }
$sequence_2 = { 53 50 e8???????? 8b7e0c 895e10 }
$sequence_3 = { 83c408 c20800 51 53 }
$sequence_4 = { 83fe12 7cd7 8d754c bb04000000 bf80000000 }
$sequence_5 = { 5f 8b4c2428 33cc e8???????? 83c42c c20800 56 }
$sequence_6 = { 6a00 68???????? e8???????? 83c40c 68d0070000 }
$sequence_7 = { 0fb6d9 894c2414 0fb6e8 c1e808 8bc8 }
$sequence_8 = { 894618 ffd7 89461c 5f }
$sequence_9 = { 8b4718 894608 8b4f1c 51 e8???????? 894604 }
$sequence_10 = { ff7608 ff5604 6800800000 6a00 }
$sequence_11 = { 8bc7 5e 5f 5b 5d c3 6a08 }
$sequence_12 = { 833e00 741a 6a00 6a00 ff7608 }
$sequence_13 = { 394878 7456 39487c 7451 }
$sequence_14 = { 53 50 89b5d8fbffff e8???????? 8b3d???????? }
$sequence_15 = { 6a00 50 8906 e8???????? 83c410 c3 }
$sequence_16 = { 83c8ff e9???????? 4c8bfb 4c8bf3 488d0540d30000 }
$sequence_17 = { 4863d9 4c8be3 49c1fc05 4c8d2d56ab0000 83e31f }
$sequence_18 = { 7cc1 034004 8b4804 8b10 03d1 }
$sequence_19 = { 4889842480040000 488bd9 33ff 488d8c2471030000 }
$sequence_20 = { 4c8d4c2440 488d542448 41b820000000 488bcf 48c744242000000000 ff15???????? }
$sequence_21 = { 448ba088000000 488b4110 4c896c2410 4c89742408 468b74201c 468b6c2024 428b6c2020 }
$sequence_22 = { 8b4d08 8945f0 8b450c 8945f4 8b4514 40 c745ec2dba2300 }
$sequence_23 = { 89430c 8d4310 8d89bc182400 5a 668b31 668930 83c102 }
$sequence_24 = { 0fb7444b10 6641898448b81c0100 ffc2 89542420 ebe2 8bd7 89542420 }
$sequence_25 = { 480fbec5 420fbe8c0870b30000 83e10f eb03 }
$sequence_26 = { b964000000 ff15???????? 48ffc3 4883ef01 75db }
condition:
7 of them and filesize < 188416
}
Strings (27 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 99 83e207 03c2 c1f803 83c40c } | |
| $sequence_1 | hex | { 8b4718 8a5f06 50 894608 } | |
| $sequence_2 | hex | { 53 50 e8???????? 8b7e0c 895e10 } | |
| $sequence_3 | hex | { 83c408 c20800 51 53 } | |
| $sequence_4 | hex | { 83fe12 7cd7 8d754c bb04000000 bf80000000 } | |
| $sequence_5 | hex | { 5f 8b4c2428 33cc e8???????? 83c42c c20800 56 } | |
| $sequence_6 | hex | { 6a00 68???????? e8???????? 83c40c 68d0070000 } | |
| $sequence_7 | hex | { 0fb6d9 894c2414 0fb6e8 c1e808 8bc8 } | |
| $sequence_8 | hex | { 894618 ffd7 89461c 5f } | |
| $sequence_9 | hex | { 8b4718 894608 8b4f1c 51 e8???????? 894604 } | |
| $sequence_10 | hex | { ff7608 ff5604 6800800000 6a00 } | |
| $sequence_11 | hex | { 8bc7 5e 5f 5b 5d c3 6a08 } | |
| $sequence_12 | hex | { 833e00 741a 6a00 6a00 ff7608 } | |
| $sequence_13 | hex | { 394878 7456 39487c 7451 } | |
| $sequence_14 | hex | { 53 50 89b5d8fbffff e8???????? 8b3d???????? } | |
| $sequence_15 | hex | { 6a00 50 8906 e8???????? 83c410 c3 } | |
| $sequence_16 | hex | { 83c8ff e9???????? 4c8bfb 4c8bf3 488d0540d30000 } | |
| $sequence_17 | hex | { 4863d9 4c8be3 49c1fc05 4c8d2d56ab0000 83e31f } | |
| $sequence_18 | hex | { 7cc1 034004 8b4804 8b10 03d1 } | |
| $sequence_19 | hex | { 4889842480040000 488bd9 33ff 488d8c2471030000 } | |
| $sequence_20 | hex | { 4c8d4c2440 488d542448 41b820000000 488bcf 48c744242000000000 ff15???????? } | |
| $sequence_21 | hex | { 448ba088000000 488b4110 4c896c2410 4c89742408 468b74201c 468b6c2024 428b6c2020 } | |
| $sequence_22 | hex | { 8b4d08 8945f0 8b450c 8945f4 8b4514 40 c745ec2dba2300 } | |
| $sequence_23 | hex | { 89430c 8d4310 8d89bc182400 5a 668b31 668930 83c102 } | |
| $sequence_24 | hex | { 0fb7444b10 6641898448b81c0100 ffc2 89542420 ebe2 8bd7 89542420 } | |
| $sequence_25 | hex | { 480fbec5 420fbe8c0870b30000 83e10f eb03 } | |
| $sequence_26 | hex | { b964000000 ff15???????? 48ffc3 4883ef01 75db } |
Condition
7 of them and filesize < 188416In plain words (Heuristic)
- The file must be smaller than 188416 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
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)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: bc74395a-f867-5375-b1a4-3194ab3faef7
Metadata
| 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 |
Tags:FILE
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