YARA · Malpedia signator rules
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:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "f7b662d9-32bf-5367-8f26-500397b392d0"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.strelastealer"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.strelastealer_auto.yar#L1-L234"
= "N/A"
= "83930b7a5402aa3096931fe0543dd89c5f32753ef96995a5e84b10a064c89883"
= 75
= 73
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "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)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 385e02 740b 8b7c2424 8bde e8???????? 56 } | |
| $sequence_1 | hex | { 4533c9 4c89a424d0050000 ba00000080 4533e4 4c89b424c8050000 } | |
| $sequence_2 | hex | { 01c1 b8dc8856d3 29c8 b9dd8856d3 } | |
| $sequence_3 | hex | { 01c7 897d14 8d1401 81c200040000 } | |
| $sequence_4 | hex | { 895128 488d0d87a30000 488b45d8 488908 488d0d892f0100 488b45d8 8990a8030000 } | |
| $sequence_5 | hex | { 08c1 0f1f440000 b810000000 e8???????? } | |
| $sequence_6 | hex | { e8???????? 8b4de4 83c40c 6bc930 8975e0 8db128b90010 8975e4 } | |
| $sequence_7 | hex | { 488b8888000000 488d053d110100 483bc8 7405 e8???????? c70301000000 488b85a0010000 } | |
| $sequence_8 | hex | { 08c1 08d3 89ca 80e201 } | |
| $sequence_9 | hex | { 68???????? ff15???????? 6a05 8bf8 e8???????? 8b15???????? } | |
| $sequence_10 | hex | { 08c1 08da 80f201 89c8 } | |
| $sequence_11 | hex | { 015304 eb55 4d85c0 7e27 488bd7 4c8b4dc7 4b8b8ccbc0120600 } | |
| $sequence_12 | hex | { 4883ec20 8bd9 4c8d0d2de10000 b901000000 4c8d0519e10000 488d151ae10000 } | |
| $sequence_13 | hex | { 56 e8???????? 83c414 8b45fc ff34c5acb20010 53 } | |
| $sequence_14 | hex | { 08c1 20ca 80f101 89c8 } | |
| $sequence_15 | hex | { e8???????? 8b15???????? 83c404 8bf0 52 } | |
| $sequence_16 | hex | { 4e0fbeac18d0a80100 418d4d01 4c8b459f 4c2bc6 } | |
| $sequence_17 | hex | { 4c8d052fcc0000 83e23f 488bcf 48c1f906 488d14d2 498b0cc8 c644d13800 } | |
| $sequence_18 | hex | { 4883611000 488d056cc50000 48894108 488d0551c50000 488901 } | |
| $sequence_19 | hex | { 53 53 53 8d4c245c 51 8b4c242c 8d942494050000 } | |
| $sequence_20 | hex | { ff15???????? 8b442434 8b4c2438 53 53 } | |
| $sequence_21 | hex | { 53 6804010000 8d94247c030000 52 50 } | |
| $sequence_22 | hex | { 03c7 751f 488b85a0010000 488b8888000000 488d0505540100 } | |
| $sequence_23 | hex | { ff15???????? 448b4c2478 488d85c0010000 4c8b4580 } |
Condition
7 of them and filesize < 872448In 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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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: f7b662d9-32bf-5367-8f26-500397b392d0
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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