YARA · Malpedia signator rules
MALPEDIA_Win_Flusihoc_Auto
autogenerated rule brought to you by yara-signator
MalwareFlusihocMalpedia 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: Flusihoc.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-flusihoc-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Flusihoc_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "aa1d30fd-9a5f-5977-b1cf-b323ea3cbb49"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.flusihoc"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.flusihoc_auto.yar#L1-L172"
= "N/A"
= "6c1029f65d4facbc15d18f2f2d2ef3e91bd264c4306a1959142efaef5eb93d4d"
= 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 = { 8db42459010000 6a00 6a01 6a02 }
$sequence_1 = { 3d68010000 7505 fe06 fe4e17 83f834 }
$sequence_2 = { ffd6 8b542414 52 ffd6 6a0a ff15???????? }
$sequence_3 = { 3d88010000 7505 fe06 fe461e 3d68010000 7505 }
$sequence_4 = { 53 56 57 6a40 8d442428 6a00 50 }
$sequence_5 = { 41 84c0 75f1 8d45f0 50 e8???????? }
$sequence_6 = { 33c0 888c045e010000 8a4c042c 40 80f92f }
$sequence_7 = { 50 ff15???????? 8b4c2410 51 ffd6 8b542414 52 }
$sequence_8 = { 6a00 50 c744242c44000000 e8???????? }
$sequence_9 = { ffd3 8b442410 6aff 50 ff15???????? }
$sequence_10 = { 83e4f8 81ece40b0000 a1???????? 33c4 }
$sequence_11 = { 7416 8d4de8 3c7c 740f 3c0a }
$sequence_12 = { b854160000 e8???????? a1???????? 33c4 89842450160000 53 }
$sequence_13 = { 8b95f4feffff 52 ff15???????? 8b4dfc 33cd 33c0 e8???????? }
$sequence_14 = { ff15???????? 8d95f4feffff 52 6806000200 6a00 68???????? }
$sequence_15 = { 752f 8b8df4feffff 6804010000 8d85f8feffff 50 6a01 6a00 }
condition:
7 of them and filesize < 319488
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8db42459010000 6a00 6a01 6a02 } | |
| $sequence_1 | hex | { 3d68010000 7505 fe06 fe4e17 83f834 } | |
| $sequence_2 | hex | { ffd6 8b542414 52 ffd6 6a0a ff15???????? } | |
| $sequence_3 | hex | { 3d88010000 7505 fe06 fe461e 3d68010000 7505 } | |
| $sequence_4 | hex | { 53 56 57 6a40 8d442428 6a00 50 } | |
| $sequence_5 | hex | { 41 84c0 75f1 8d45f0 50 e8???????? } | |
| $sequence_6 | hex | { 33c0 888c045e010000 8a4c042c 40 80f92f } | |
| $sequence_7 | hex | { 50 ff15???????? 8b4c2410 51 ffd6 8b542414 52 } | |
| $sequence_8 | hex | { 6a00 50 c744242c44000000 e8???????? } | |
| $sequence_9 | hex | { ffd3 8b442410 6aff 50 ff15???????? } | |
| $sequence_10 | hex | { 83e4f8 81ece40b0000 a1???????? 33c4 } | |
| $sequence_11 | hex | { 7416 8d4de8 3c7c 740f 3c0a } | |
| $sequence_12 | hex | { b854160000 e8???????? a1???????? 33c4 89842450160000 53 } | |
| $sequence_13 | hex | { 8b95f4feffff 52 ff15???????? 8b4dfc 33cd 33c0 e8???????? } | |
| $sequence_14 | hex | { ff15???????? 8d95f4feffff 52 6806000200 6a00 68???????? } | |
| $sequence_15 | hex | { 752f 8b8df4feffff 6804010000 8d85f8feffff 50 6a01 6a00 } |
Condition
7 of them and filesize < 319488In plain words (Heuristic)
- The file must be smaller than 319488 (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: aa1d30fd-9a5f-5977-b1cf-b323ea3cbb49
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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