YARA · Malpedia signator rules
MALPEDIA_Win_Medusa_Http_Auto
autogenerated rule brought to you by yara-signator
MalwareMedusa HttpMalpedia 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: Medusa Http.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-medusa-http-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Medusa_Http_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "d20a8f8a-0c40-56df-b905-5b8d6ebe61b2"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.medusa_http"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.medusa_http_auto.yar#L1-L120"
= "N/A"
= "bf22f346b79f830cfb557e80bea02849fba4fc00ac522de893ed484b5992cd17"
= 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 = { e1fb 1cc9 3ca5 2c8e a1???????? d528 }
$sequence_1 = { ff7100 52 ff7200 53 ff7300 54 }
$sequence_2 = { 6a00 4b ff6b00 4c ff6c004d ff6d00 4e }
$sequence_3 = { 0050ff 7000 51 ff7100 }
$sequence_4 = { 53 ff7300 54 ff740055 ff7500 56 }
$sequence_5 = { 8b4c6386 8608 5f e1fb 1cc9 3ca5 2c8e }
$sequence_6 = { 0c48 b5f9 43 324dd5 1ddf859f31 }
$sequence_7 = { 0000 aa 05854cffab 004893 }
$sequence_8 = { 05854cffab 004893 3eb35b 813bf80937dc 8b4c6386 }
$sequence_9 = { 1cc9 3ca5 2c8e a1???????? d528 32f4 }
condition:
7 of them and filesize < 1720320
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e1fb 1cc9 3ca5 2c8e a1???????? d528 } | |
| $sequence_1 | hex | { ff7100 52 ff7200 53 ff7300 54 } | |
| $sequence_2 | hex | { 6a00 4b ff6b00 4c ff6c004d ff6d00 4e } | |
| $sequence_3 | hex | { 0050ff 7000 51 ff7100 } | |
| $sequence_4 | hex | { 53 ff7300 54 ff740055 ff7500 56 } | |
| $sequence_5 | hex | { 8b4c6386 8608 5f e1fb 1cc9 3ca5 2c8e } | |
| $sequence_6 | hex | { 0c48 b5f9 43 324dd5 1ddf859f31 } | |
| $sequence_7 | hex | { 0000 aa 05854cffab 004893 } | |
| $sequence_8 | hex | { 05854cffab 004893 3eb35b 813bf80937dc 8b4c6386 } | |
| $sequence_9 | hex | { 1cc9 3ca5 2c8e a1???????? d528 32f4 } |
Condition
7 of them and filesize < 1720320In plain words (Heuristic)
- The file must be smaller than 1720320 (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: d20a8f8a-0c40-56df-b905-5b8d6ebe61b2
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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