YARA · Malpedia signator rules
MALPEDIA_Win_Sasfis_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: Sasfis.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-sasfis-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Sasfis_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "faa37fe5-b8ae-5b3d-8761-9ca44fa700a7"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.sasfis"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.sasfis_auto.yar#L1-L121"
= "N/A"
= "cf32d2a1a7d6bbcae913d88ae0d2c6c9327ff9b8dad43d2e492ba8c00cbedd6a"
= 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 = { 241c 2c05 006188 c526 3503007ca3 ef 2b30 }
$sequence_1 = { 0bb2ea7632d3 728b 896b90 35d0797819 d581 }
$sequence_2 = { 880c24 8d642450 e9???????? 60 }
$sequence_3 = { 8f44241c f9 66ffc7 0fbdfa 80fe07 87742418 660fbafe06 }
$sequence_4 = { 036e20 43 7465 47 }
$sequence_5 = { 2030 51 090a 4d 1321 }
$sequence_6 = { 66893c24 89442434 9c 660fbef8 9c 89542438 68d58c61ca }
$sequence_7 = { 660fbec2 660fb6c0 8b4500 e8???????? 661584f0 fec0 27 }
$sequence_8 = { 7aae 2931 55 3cf4 b729 0300 47 }
$sequence_9 = { 9c 8f442440 8d3cfd9c379c8f 66ffcf }
condition:
7 of them and filesize < 8060928
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 241c 2c05 006188 c526 3503007ca3 ef 2b30 } | |
| $sequence_1 | hex | { 0bb2ea7632d3 728b 896b90 35d0797819 d581 } | |
| $sequence_2 | hex | { 880c24 8d642450 e9???????? 60 } | |
| $sequence_3 | hex | { 8f44241c f9 66ffc7 0fbdfa 80fe07 87742418 660fbafe06 } | |
| $sequence_4 | hex | { 036e20 43 7465 47 } | |
| $sequence_5 | hex | { 2030 51 090a 4d 1321 } | |
| $sequence_6 | hex | { 66893c24 89442434 9c 660fbef8 9c 89542438 68d58c61ca } | |
| $sequence_7 | hex | { 660fbec2 660fb6c0 8b4500 e8???????? 661584f0 fec0 27 } | |
| $sequence_8 | hex | { 7aae 2931 55 3cf4 b729 0300 47 } | |
| $sequence_9 | hex | { 9c 8f442440 8d3cfd9c379c8f 66ffcf } |
Condition
7 of them and filesize < 8060928In plain words (Heuristic)
- The file must be smaller than 8060928 (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: faa37fe5-b8ae-5b3d-8761-9ca44fa700a7
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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