YARA · Malpedia signator rules
MALPEDIA_Win_Mariposa_Auto
autogenerated rule brought to you by yara-signator
MalwareMariposaMalpedia 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: Mariposa.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-mariposa-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Mariposa_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "2a3a2192-1985-5afb-a3c8-457f3f4c729c"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.mariposa"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.mariposa_auto.yar#L1-L118"
= "N/A"
= "343ac33f57cd9cc9bfc1841bf1bd211734de245f417ee554220587a46ed4086f"
= 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 = { 55 8bec 53 56 bb???????? 43 }
$sequence_1 = { ffd3 33c0 50 e8???????? 33c0 }
$sequence_2 = { 53 56 bb???????? 43 }
$sequence_3 = { 885c0cff e2f1 ba???????? 2bd6 8bdc 03da 4b }
$sequence_4 = { 8a1c0e 02d8 32dc fec0 885c0cff e2f1 }
$sequence_5 = { 8bdc 03da 4b 54 ffd3 33c0 }
$sequence_6 = { 885c0cff e2f1 ba???????? 2bd6 }
$sequence_7 = { 8a4301 8a6302 f6d0 02c4 d0f8 8a1c0e }
$sequence_8 = { 53 56 bb???????? 43 803b00 }
$sequence_9 = { 03da 4b 54 ffd3 33c0 }
condition:
7 of them and filesize < 311296
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 55 8bec 53 56 bb???????? 43 } | |
| $sequence_1 | hex | { ffd3 33c0 50 e8???????? 33c0 } | |
| $sequence_2 | hex | { 53 56 bb???????? 43 } | |
| $sequence_3 | hex | { 885c0cff e2f1 ba???????? 2bd6 8bdc 03da 4b } | |
| $sequence_4 | hex | { 8a1c0e 02d8 32dc fec0 885c0cff e2f1 } | |
| $sequence_5 | hex | { 8bdc 03da 4b 54 ffd3 33c0 } | |
| $sequence_6 | hex | { 885c0cff e2f1 ba???????? 2bd6 } | |
| $sequence_7 | hex | { 8a4301 8a6302 f6d0 02c4 d0f8 8a1c0e } | |
| $sequence_8 | hex | { 53 56 bb???????? 43 803b00 } | |
| $sequence_9 | hex | { 03da 4b 54 ffd3 33c0 } |
Condition
7 of them and filesize < 311296In plain words (Heuristic)
- The file must be smaller than 311296 (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: 2a3a2192-1985-5afb-a3c8-457f3f4c729c
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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