YARA · Malpedia signator rules
MALPEDIA_Win_Synflooder_Auto
autogenerated rule brought to you by yara-signator
MalwareSynflooderMalpedia 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: Synflooder.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-synflooder-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Synflooder_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "efa068ab-80ee-5171-9690-564cfdb6f68c"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.synflooder"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.synflooder_auto.yar#L1-L122"
= "N/A"
= "4a8a1c9ae0a778696e25fa4570a1688ba1f6ebca583f2f70ec6f184bb580f357"
= 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 = { 51 ff15???????? 89470c c7471800000000 e8???????? 99 }
$sequence_1 = { 7229 f3a5 ff2495e07a4000 8bc7 ba03000000 83e904 }
$sequence_2 = { 50 e8???????? 8b4de4 83c40c 6bc930 8975e0 8db130ea4000 }
$sequence_3 = { ff15???????? 89470c c7471800000000 e8???????? 99 b9e8fd0000 f7f9 }
$sequence_4 = { a3???????? 8d7901 8a11 41 84d2 }
$sequence_5 = { 8bff 56 57 33ff ffb7b0e54000 ff15???????? 8987b0e54000 }
$sequence_6 = { 83c404 eb17 bb00040000 c744241800280000 }
$sequence_7 = { e8???????? 85c0 0f8517010000 ff15???????? 50 e8???????? }
$sequence_8 = { 52 0fb6d4 52 0fb6c0 }
$sequence_9 = { 81ecf4010000 a1???????? 33c4 898424f0010000 53 56 }
condition:
7 of them and filesize < 163840
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 51 ff15???????? 89470c c7471800000000 e8???????? 99 } | |
| $sequence_1 | hex | { 7229 f3a5 ff2495e07a4000 8bc7 ba03000000 83e904 } | |
| $sequence_2 | hex | { 50 e8???????? 8b4de4 83c40c 6bc930 8975e0 8db130ea4000 } | |
| $sequence_3 | hex | { ff15???????? 89470c c7471800000000 e8???????? 99 b9e8fd0000 f7f9 } | |
| $sequence_4 | hex | { a3???????? 8d7901 8a11 41 84d2 } | |
| $sequence_5 | hex | { 8bff 56 57 33ff ffb7b0e54000 ff15???????? 8987b0e54000 } | |
| $sequence_6 | hex | { 83c404 eb17 bb00040000 c744241800280000 } | |
| $sequence_7 | hex | { e8???????? 85c0 0f8517010000 ff15???????? 50 e8???????? } | |
| $sequence_8 | hex | { 52 0fb6d4 52 0fb6c0 } | |
| $sequence_9 | hex | { 81ecf4010000 a1???????? 33c4 898424f0010000 53 56 } |
Condition
7 of them and filesize < 163840In plain words (Heuristic)
- The file must be smaller than 163840 (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: efa068ab-80ee-5171-9690-564cfdb6f68c
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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