YARA · Malpedia signator rules
MALPEDIA_Win_Younglotus_Auto
autogenerated rule brought to you by yara-signator
MalwareYounglotusMalpedia 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: Younglotus.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-younglotus-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Younglotus_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "554380af-366d-53a8-8c28-aef30d98c1a4"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.younglotus"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.younglotus_auto.yar#L1-L163"
= "N/A"
= "aacec19b197e5dcfdea8930de258c96adf4bce4ad48726b17cf7c20f4827ae63"
= 75
= 75
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "TLP:WHITE"
strings:
$sequence_0 = { 6802000080 e8???????? 83c41c 6a01 }
$sequence_1 = { eb02 ebc9 8b45f8 50 }
$sequence_2 = { ff15???????? 8945d8 68???????? 8b55c8 52 ff15???????? 8945d0 }
$sequence_3 = { 3419 8b4d08 034dfc 8801 8b5508 }
$sequence_4 = { 64a100000000 50 64892500000000 81c4d0feffff 53 56 }
$sequence_5 = { 8d95a8faffff 52 ff15???????? 83c408 }
$sequence_6 = { 51 68???????? 68???????? ff15???????? 83c408 }
$sequence_7 = { 8d85f8fdffff 50 68???????? 8d8df8fdffff 51 ff15???????? }
$sequence_8 = { 53 56 57 68???????? ff15???????? 8945dc 68???????? }
$sequence_9 = { 8d85e8feffff 68???????? 50 ff15???????? 6a01 }
$sequence_10 = { 837c240c00 c706???????? 740f ff74240c 68???????? ff15???????? 8b442410 }
$sequence_11 = { 50 ff15???????? 83c40c 8d85f8fdffff 6a00 }
$sequence_12 = { 8b35???????? 8365fc00 8bf8 68???????? }
$sequence_13 = { 8bf8 8b45fc 33c9 6a04 }
$sequence_14 = { e8???????? 8b45fc 83c40c 80cc10 }
$sequence_15 = { 51 ffd0 50 ffd3 }
condition:
7 of them and filesize < 106496
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 6802000080 e8???????? 83c41c 6a01 } | |
| $sequence_1 | hex | { eb02 ebc9 8b45f8 50 } | |
| $sequence_2 | hex | { ff15???????? 8945d8 68???????? 8b55c8 52 ff15???????? 8945d0 } | |
| $sequence_3 | hex | { 3419 8b4d08 034dfc 8801 8b5508 } | |
| $sequence_4 | hex | { 64a100000000 50 64892500000000 81c4d0feffff 53 56 } | |
| $sequence_5 | hex | { 8d95a8faffff 52 ff15???????? 83c408 } | |
| $sequence_6 | hex | { 51 68???????? 68???????? ff15???????? 83c408 } | |
| $sequence_7 | hex | { 8d85f8fdffff 50 68???????? 8d8df8fdffff 51 ff15???????? } | |
| $sequence_8 | hex | { 53 56 57 68???????? ff15???????? 8945dc 68???????? } | |
| $sequence_9 | hex | { 8d85e8feffff 68???????? 50 ff15???????? 6a01 } | |
| $sequence_10 | hex | { 837c240c00 c706???????? 740f ff74240c 68???????? ff15???????? 8b442410 } | |
| $sequence_11 | hex | { 50 ff15???????? 83c40c 8d85f8fdffff 6a00 } | |
| $sequence_12 | hex | { 8b35???????? 8365fc00 8bf8 68???????? } | |
| $sequence_13 | hex | { 8bf8 8b45fc 33c9 6a04 } | |
| $sequence_14 | hex | { e8???????? 8b45fc 83c40c 80cc10 } | |
| $sequence_15 | hex | { 51 ffd0 50 ffd3 } |
Condition
7 of them and filesize < 106496In plain words (Heuristic)
- The file must be smaller than 106496 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
Test this rule in your browser
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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: 554380af-366d-53a8-8c28-aef30d98c1a4
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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