YARA · Malpedia signator rules
MALPEDIA_Win_Misfox_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: Misfox.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-misfox-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Misfox_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "ad4a465e-502d-557b-9df0-0d09a5d58c98"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.misfox"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.misfox_auto.yar#L1-L174"
= "N/A"
= "f0284d77322fd81fc80799ff8b17c387a5c86ef9b47522a47cced1f49d8f1bd3"
= 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 = { ddd8 db2d???????? b801000000 833d????????00 0f8536510000 }
$sequence_1 = { 8bf7 8906 8d7604 40 3d00010000 7cf3 c745fc00000000 }
$sequence_2 = { 8d44241c 50 6a01 8d442420 50 8d442440 50 }
$sequence_3 = { 8b0c8550870110 8b8524e5ffff f644080480 0f8475030000 8b9530e5ffff 33ff 89bd34e5ffff }
$sequence_4 = { c3 8bc1 85f6 7409 }
$sequence_5 = { 7f0a b80a000000 5e 8be5 5d c3 53 }
$sequence_6 = { ff74241c ffd6 85c0 7560 8b3d???????? }
$sequence_7 = { 83e908 8d7608 660fd60f 8d7f08 8b048d08410010 }
$sequence_8 = { 488d4dff ba00020000 c745cb00020000 448975c7 }
$sequence_9 = { e8???????? 8b430c 4c8d6708 894308 8b470c }
$sequence_10 = { 488bc3 488b5c2430 4883c420 5f c3 488d0d4c6f0100 }
$sequence_11 = { 48837d0810 4c0f434df0 488d4d10 48837d2810 480f434d10 8b4500 }
$sequence_12 = { eb15 413bc4 753e 0fb65530 0fb64531 }
$sequence_13 = { 8d41fa 83f801 7774 488b4dbf ff15???????? 83f826 }
$sequence_14 = { 488bc3 488bfb 48c1ff05 4c8d3526d20000 83e01f 486bf058 498b04fe }
$sequence_15 = { 4833c4 48894547 488d0d615f0100 ff15???????? 488d4def ba00080000 }
condition:
7 of them and filesize < 266240
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { ddd8 db2d???????? b801000000 833d????????00 0f8536510000 } | |
| $sequence_1 | hex | { 8bf7 8906 8d7604 40 3d00010000 7cf3 c745fc00000000 } | |
| $sequence_2 | hex | { 8d44241c 50 6a01 8d442420 50 8d442440 50 } | |
| $sequence_3 | hex | { 8b0c8550870110 8b8524e5ffff f644080480 0f8475030000 8b9530e5ffff 33ff 89bd34e5ffff } | |
| $sequence_4 | hex | { c3 8bc1 85f6 7409 } | |
| $sequence_5 | hex | { 7f0a b80a000000 5e 8be5 5d c3 53 } | |
| $sequence_6 | hex | { ff74241c ffd6 85c0 7560 8b3d???????? } | |
| $sequence_7 | hex | { 83e908 8d7608 660fd60f 8d7f08 8b048d08410010 } | |
| $sequence_8 | hex | { 488d4dff ba00020000 c745cb00020000 448975c7 } | |
| $sequence_9 | hex | { e8???????? 8b430c 4c8d6708 894308 8b470c } | |
| $sequence_10 | hex | { 488bc3 488b5c2430 4883c420 5f c3 488d0d4c6f0100 } | |
| $sequence_11 | hex | { 48837d0810 4c0f434df0 488d4d10 48837d2810 480f434d10 8b4500 } | |
| $sequence_12 | hex | { eb15 413bc4 753e 0fb65530 0fb64531 } | |
| $sequence_13 | hex | { 8d41fa 83f801 7774 488b4dbf ff15???????? 83f826 } | |
| $sequence_14 | hex | { 488bc3 488bfb 48c1ff05 4c8d3526d20000 83e01f 486bf058 498b04fe } | |
| $sequence_15 | hex | { 4833c4 48894547 488d0d615f0100 ff15???????? 488d4def ba00080000 } |
Condition
7 of them and filesize < 266240In plain words (Heuristic)
- The file must be smaller than 266240 (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: ad4a465e-502d-557b-9df0-0d09a5d58c98
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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