YARA · Malpedia signator rules
MALPEDIA_Win_Tinyfluff_Auto
autogenerated rule brought to you by yara-signator
MalwareTinyfluffMalpedia 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: Tinyfluff.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-tinyfluff-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Tinyfluff_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "3eca6862-6e09-58a6-acd1-a2af98bf8e58"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.tinyfluff"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.tinyfluff_auto.yar#L1-L119"
= "N/A"
= "6afa74067516ba5088f7bd96111298af62d0633ee2efb535cb1f77ad63a7d097"
= 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 = { 8bce 83e63f c1f906 6bf638 8b0c8d50704100 }
$sequence_1 = { e9???????? 8d8de0fbffff 8d5102 668b01 83c102 6685c0 75f5 }
$sequence_2 = { 83e13f c1f806 6bc938 8b048550704100 f644082801 }
$sequence_3 = { 57 8db8b06e4100 57 ff15???????? }
$sequence_4 = { 8b8650704100 85c0 740e 50 e8???????? }
$sequence_5 = { 6bc838 53 56 8b049550704100 }
$sequence_6 = { 8bce 83e63f c1f906 6bf638 8b0c8d50704100 80643128fd }
$sequence_7 = { 8b0c8550704100 8a043b 03ce 8844192e 43 3bda }
$sequence_8 = { 6a04 58 6bc000 c7806c69410002000000 6a04 58 }
$sequence_9 = { 8b7db4 8bf3 8b04bd50704100 03c1 885c302e 46 3bf2 }
condition:
7 of them and filesize < 245760
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8bce 83e63f c1f906 6bf638 8b0c8d50704100 } | |
| $sequence_1 | hex | { e9???????? 8d8de0fbffff 8d5102 668b01 83c102 6685c0 75f5 } | |
| $sequence_2 | hex | { 83e13f c1f806 6bc938 8b048550704100 f644082801 } | |
| $sequence_3 | hex | { 57 8db8b06e4100 57 ff15???????? } | |
| $sequence_4 | hex | { 8b8650704100 85c0 740e 50 e8???????? } | |
| $sequence_5 | hex | { 6bc838 53 56 8b049550704100 } | |
| $sequence_6 | hex | { 8bce 83e63f c1f906 6bf638 8b0c8d50704100 80643128fd } | |
| $sequence_7 | hex | { 8b0c8550704100 8a043b 03ce 8844192e 43 3bda } | |
| $sequence_8 | hex | { 6a04 58 6bc000 c7806c69410002000000 6a04 58 } | |
| $sequence_9 | hex | { 8b7db4 8bf3 8b04bd50704100 03c1 885c302e 46 3bf2 } |
Condition
7 of them and filesize < 245760In plain words (Heuristic)
- The file must be smaller than 245760 (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: 3eca6862-6e09-58a6-acd1-a2af98bf8e58
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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