YARA · Malpedia signator rules
MALPEDIA_Win_Santa_Stealer_Auto
autogenerated rule brought to you by yara-signator
MalwareSanta StealerMalpedia 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: Santa Stealer.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-santa-stealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Santa_Stealer_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "d1fd15ad-7a3d-5595-97cf-69df8560dd65"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.santa_stealer"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.santa_stealer_auto.yar#L1-L134"
= "N/A"
= "b2de36531f2ed031c4dac419ae11d768684a1ddd7f608f2f2664c37f846ef406"
= 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 = { f6c208 0f840a010000 4d8b6f40 49634500 85c0 0f8efa000000 4c89842490000000 }
$sequence_1 = { 4c89d2 4889f9 e8???????? 4585ed 400f95c5 807f6700 752a }
$sequence_2 = { e8???????? 8b9424ac000000 4889c7 85d2 0f8827050000 0f8511060000 488bac24c8000000 }
$sequence_3 = { c744242000000000 ba47000000 e8???????? 0fb64761 4189e9 4c89e1 448b44244c }
$sequence_4 = { e8???????? 4885c0 0f845dfbffff 488d0dafaf1700 e8???????? 4885c0 0f8448fbffff }
$sequence_5 = { f20f10642428 f20f59d9 f20f59c2 f20f58c3 f20f58c4 f20f11442428 f20f10442420 }
$sequence_6 = { e8???????? c744242000000000 488b942428010000 4531c9 4189c0 89842418010000 e8???????? }
$sequence_7 = { e8???????? b801000000 89db 488d15a5cb1500 0fb61c1a 01df 488d5638 }
$sequence_8 = { c68424ad00000000 c78424cc00000000000000 0fb6bc2497000000 48c74030ffffffff e9???????? c684249600000000 c78424a800000000000000 }
$sequence_9 = { e9???????? 4889bc24a0000000 488b4510 c78424ac00000064000000 f30f6f9424a0000000 0f1110 e9???????? }
condition:
7 of them and filesize < 27009024
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { f6c208 0f840a010000 4d8b6f40 49634500 85c0 0f8efa000000 4c89842490000000 } | |
| $sequence_1 | hex | { 4c89d2 4889f9 e8???????? 4585ed 400f95c5 807f6700 752a } | |
| $sequence_2 | hex | { e8???????? 8b9424ac000000 4889c7 85d2 0f8827050000 0f8511060000 488bac24c8000000 } | |
| $sequence_3 | hex | { c744242000000000 ba47000000 e8???????? 0fb64761 4189e9 4c89e1 448b44244c } | |
| $sequence_4 | hex | { e8???????? 4885c0 0f845dfbffff 488d0dafaf1700 e8???????? 4885c0 0f8448fbffff } | |
| $sequence_5 | hex | { f20f10642428 f20f59d9 f20f59c2 f20f58c3 f20f58c4 f20f11442428 f20f10442420 } | |
| $sequence_6 | hex | { e8???????? c744242000000000 488b942428010000 4531c9 4189c0 89842418010000 e8???????? } | |
| $sequence_7 | hex | { e8???????? b801000000 89db 488d15a5cb1500 0fb61c1a 01df 488d5638 } | |
| $sequence_8 | hex | { c68424ad00000000 c78424cc00000000000000 0fb6bc2497000000 48c74030ffffffff e9???????? c684249600000000 c78424a800000000000000 } | |
| $sequence_9 | hex | { e9???????? 4889bc24a0000000 488b4510 c78424ac00000064000000 f30f6f9424a0000000 0f1110 e9???????? } |
Condition
7 of them and filesize < 27009024In plain words (Heuristic)
- The file must be smaller than 27009024 (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: d1fd15ad-7a3d-5595-97cf-69df8560dd65
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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