YARA · Malpedia signator rules
MALPEDIA_Win_Sisfader_Auto
autogenerated rule brought to you by yara-signator
MalwareSisfaderMalpedia 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 / 73
What this rule detects
autogenerated rule brought to you by yara-signator
Associated malware family: Sisfader.
It defines 30 patterns (0 text, 30 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-sisfader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Sisfader_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "a85deabd-1713-5712-ad21-30c4dbfed6c4"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.sisfader"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.sisfader_auto.yar#L1-L274"
= "N/A"
= "183bda12581d1ae277a0dafad31da6228edc983478c44a7bd0986aab756d3f6f"
= 75
= 73
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "TLP:WHITE"
strings:
$sequence_0 = { e8???????? 85c0 b91d000000 0f44d9 }
$sequence_1 = { 85c9 741f 33c0 85c9 }
$sequence_2 = { 8955f0 8b45f8 8b4838 894dcc }
$sequence_3 = { 33c9 e8???????? 85c0 7502 eb7c }
$sequence_4 = { ff15???????? a3???????? 833d????????00 7510 6a00 }
$sequence_5 = { 85c0 754b 8b4f04 83c124 }
$sequence_6 = { c705????????07000000 8b442438 8905???????? c705????????00000000 }
$sequence_7 = { 8b442440 89442420 837c242001 7425 }
$sequence_8 = { ff15???????? 89442450 837c245000 7402 }
$sequence_9 = { 7568 8d43dc 8906 83f824 }
$sequence_10 = { 6bc800 8b550c 8b040a 50 ff15???????? }
$sequence_11 = { 33c0 e9???????? e9???????? ff15???????? }
$sequence_12 = { 75f5 c70665632985 663939 8b3d???????? 7407 }
$sequence_13 = { 0f84cd010000 6683f92e 750f 6683bc248000000000 0f84b8010000 ffc5 }
$sequence_14 = { 7424 85c9 7420 8bc3 660f1f440000 8bc8 }
$sequence_15 = { 8bda 8bf9 ff15???????? 85c0 0f8584000000 6a06 6a01 }
$sequence_16 = { eb2e 8b4dfc c7411001000000 eb11 8b55fc 8b02 8b4df4 }
$sequence_17 = { 8b3d???????? 81c600010000 c745dcaaeeddff c745e4e1f00000 }
$sequence_18 = { 83c418 85c0 7502 eb67 8b4dfc }
$sequence_19 = { 85c0 741d 8bd3 0f1f440000 8bc2 ffc2 }
$sequence_20 = { 6685c0 0f8496010000 6683f82e 750b }
$sequence_21 = { 83ec60 c745fc00000000 c745e000000000 6a40 8b450c }
$sequence_22 = { 837c242002 7441 837c242003 745d 837c242004 7479 837c242005 }
$sequence_23 = { 7405 e9???????? 83bc248000000000 7539 }
$sequence_24 = { 33c9 85c0 7415 0f1f00 8bc1 }
$sequence_25 = { 6a00 6a00 6a01 e8???????? 83c40c eb38 6a00 }
$sequence_26 = { 56 57 8b7d10 8b7720 c706aaeeddff 8b420c 89460c }
$sequence_27 = { 8b4204 8bcf 83c024 50 e8???????? }
$sequence_28 = { 6bc800 8b5510 0fb7440a40 85c0 }
$sequence_29 = { e8???????? 33c0 83f801 7425 baffffffff }
condition:
7 of them and filesize < 417792
}
Strings (30 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e8???????? 85c0 b91d000000 0f44d9 } | |
| $sequence_1 | hex | { 85c9 741f 33c0 85c9 } | |
| $sequence_2 | hex | { 8955f0 8b45f8 8b4838 894dcc } | |
| $sequence_3 | hex | { 33c9 e8???????? 85c0 7502 eb7c } | |
| $sequence_4 | hex | { ff15???????? a3???????? 833d????????00 7510 6a00 } | |
| $sequence_5 | hex | { 85c0 754b 8b4f04 83c124 } | |
| $sequence_6 | hex | { c705????????07000000 8b442438 8905???????? c705????????00000000 } | |
| $sequence_7 | hex | { 8b442440 89442420 837c242001 7425 } | |
| $sequence_8 | hex | { ff15???????? 89442450 837c245000 7402 } | |
| $sequence_9 | hex | { 7568 8d43dc 8906 83f824 } | |
| $sequence_10 | hex | { 6bc800 8b550c 8b040a 50 ff15???????? } | |
| $sequence_11 | hex | { 33c0 e9???????? e9???????? ff15???????? } | |
| $sequence_12 | hex | { 75f5 c70665632985 663939 8b3d???????? 7407 } | |
| $sequence_13 | hex | { 0f84cd010000 6683f92e 750f 6683bc248000000000 0f84b8010000 ffc5 } | |
| $sequence_14 | hex | { 7424 85c9 7420 8bc3 660f1f440000 8bc8 } | |
| $sequence_15 | hex | { 8bda 8bf9 ff15???????? 85c0 0f8584000000 6a06 6a01 } | |
| $sequence_16 | hex | { eb2e 8b4dfc c7411001000000 eb11 8b55fc 8b02 8b4df4 } | |
| $sequence_17 | hex | { 8b3d???????? 81c600010000 c745dcaaeeddff c745e4e1f00000 } | |
| $sequence_18 | hex | { 83c418 85c0 7502 eb67 8b4dfc } | |
| $sequence_19 | hex | { 85c0 741d 8bd3 0f1f440000 8bc2 ffc2 } | |
| $sequence_20 | hex | { 6685c0 0f8496010000 6683f82e 750b } | |
| $sequence_21 | hex | { 83ec60 c745fc00000000 c745e000000000 6a40 8b450c } | |
| $sequence_22 | hex | { 837c242002 7441 837c242003 745d 837c242004 7479 837c242005 } | |
| $sequence_23 | hex | { 7405 e9???????? 83bc248000000000 7539 } | |
| $sequence_24 | hex | { 33c9 85c0 7415 0f1f00 8bc1 } | |
| $sequence_25 | hex | { 6a00 6a00 6a01 e8???????? 83c40c eb38 6a00 } | |
| $sequence_26 | hex | { 56 57 8b7d10 8b7720 c706aaeeddff 8b420c 89460c } | |
| $sequence_27 | hex | { 8b4204 8bcf 83c024 50 e8???????? } | |
| $sequence_28 | hex | { 6bc800 8b5510 0fb7440a40 85c0 } | |
| $sequence_29 | hex | { e8???????? 33c0 83f801 7425 baffffffff } |
Condition
7 of them and filesize < 417792In plain words (Heuristic)
- The file must be smaller than 417792 (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: a85deabd-1713-5712-ad21-30c4dbfed6c4
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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