YARA · Malpedia signator rules
MALPEDIA_Win_H1N1_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 / 75
What this rule detects
autogenerated rule brought to you by yara-signator
Associated malware family: H1N1.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-h1n1-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_H1N1_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "9b146697-9791-5099-8226-ae9fcb0630e1"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.h1n1"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.h1n1_auto.yar#L1-L172"
= "N/A"
= "765db783b2f41671982a50d1cf60b08bf27002298dd12c9d873aef5b9b6f4245"
= 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 = { ff750c ff35???????? 58 ffd0 50 ff750c }
$sequence_1 = { 6a00 6a00 6a00 50 6a00 6a00 ff75fc }
$sequence_2 = { 83c608 ac aa 3c2f 75fa }
$sequence_3 = { 59 85c0 75d1 83bb8000000000 7465 }
$sequence_4 = { aa 3c0d 75fa 4f 33c0 }
$sequence_5 = { 8b5d08 035b3c 6a00 ff7350 6a00 6840000008 }
$sequence_6 = { 7453 e8???????? 8ae0 ac 0ac0 7447 3c3d }
$sequence_7 = { ff75f8 ff7508 ff75fc ff75f4 ff35???????? }
$sequence_8 = { e8???????? ff7508 8d85f0fdffff 68dc600010 }
$sequence_9 = { 8bec 81ec04040000 53 56 68806e0010 }
$sequence_10 = { d1e9 330c8500850010 330c95f48b0010 42 890c95bc850010 81fae3000000 }
$sequence_11 = { 8d3c95c0850010 8b0f 334f04 23cb 330f }
$sequence_12 = { 56 6800800010 ff742410 e8???????? }
$sequence_13 = { d1e9 8b048500850010 338774fcffff 33c1 8907 83c704 }
$sequence_14 = { 23cb 330d???????? 5b 8bc1 83e001 d1e9 330c8500850010 }
$sequence_15 = { 8d8614850010 50 ffb610850010 57 ff15???????? 83c608 83fe18 }
condition:
7 of them and filesize < 172032
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { ff750c ff35???????? 58 ffd0 50 ff750c } | |
| $sequence_1 | hex | { 6a00 6a00 6a00 50 6a00 6a00 ff75fc } | |
| $sequence_2 | hex | { 83c608 ac aa 3c2f 75fa } | |
| $sequence_3 | hex | { 59 85c0 75d1 83bb8000000000 7465 } | |
| $sequence_4 | hex | { aa 3c0d 75fa 4f 33c0 } | |
| $sequence_5 | hex | { 8b5d08 035b3c 6a00 ff7350 6a00 6840000008 } | |
| $sequence_6 | hex | { 7453 e8???????? 8ae0 ac 0ac0 7447 3c3d } | |
| $sequence_7 | hex | { ff75f8 ff7508 ff75fc ff75f4 ff35???????? } | |
| $sequence_8 | hex | { e8???????? ff7508 8d85f0fdffff 68dc600010 } | |
| $sequence_9 | hex | { 8bec 81ec04040000 53 56 68806e0010 } | |
| $sequence_10 | hex | { d1e9 330c8500850010 330c95f48b0010 42 890c95bc850010 81fae3000000 } | |
| $sequence_11 | hex | { 8d3c95c0850010 8b0f 334f04 23cb 330f } | |
| $sequence_12 | hex | { 56 6800800010 ff742410 e8???????? } | |
| $sequence_13 | hex | { d1e9 8b048500850010 338774fcffff 33c1 8907 83c704 } | |
| $sequence_14 | hex | { 23cb 330d???????? 5b 8bc1 83e001 d1e9 330c8500850010 } | |
| $sequence_15 | hex | { 8d8614850010 50 ffb610850010 57 ff15???????? 83c608 83fe18 } |
Condition
7 of them and filesize < 172032In plain words (Heuristic)
- The file must be smaller than 172032 (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: 9b146697-9791-5099-8226-ae9fcb0630e1
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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