YARA · Malpedia signator rules
MALPEDIA_Win_Hardrain_Auto
autogenerated rule brought to you by yara-signator
MalwareHardrainMalpedia 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: Hardrain.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-hardrain-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Hardrain_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "2ffd1467-5498-56f3-a939-18fd49a9b53c"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.hardrain"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.hardrain_auto.yar#L1-L120"
= "N/A"
= "c4a3b4f95e5c8b2942ed8c937b9a15dd4ff46579fa79fc2e047695a69c217b33"
= 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 = { c1e902 f3a5 8bc8 8b442420 83e103 83f801 f3a4 }
$sequence_1 = { 668944244c 885c244e ff15???????? 8bcd 8db4240c010000 8bd1 8d7c244d }
$sequence_2 = { 743a 6a16 8d4c241c 55 }
$sequence_3 = { f3a4 888390020000 b90c000000 33c0 }
$sequence_4 = { e8???????? 83c408 68???????? ff15???????? 8b442404 50 }
$sequence_5 = { 8bcd 57 8bc1 8bfb }
$sequence_6 = { 895c242c c744243000000000 ff15???????? 85c0 7eca }
$sequence_7 = { 5e 83c418 c3 33c9 33c0 8b542424 894c2410 }
$sequence_8 = { 50 56 6857340000 51 e8???????? }
$sequence_9 = { e8???????? 85c0 0f85e0000000 66a1???????? 53 56 57 }
condition:
7 of them and filesize < 368640
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { c1e902 f3a5 8bc8 8b442420 83e103 83f801 f3a4 } | |
| $sequence_1 | hex | { 668944244c 885c244e ff15???????? 8bcd 8db4240c010000 8bd1 8d7c244d } | |
| $sequence_2 | hex | { 743a 6a16 8d4c241c 55 } | |
| $sequence_3 | hex | { f3a4 888390020000 b90c000000 33c0 } | |
| $sequence_4 | hex | { e8???????? 83c408 68???????? ff15???????? 8b442404 50 } | |
| $sequence_5 | hex | { 8bcd 57 8bc1 8bfb } | |
| $sequence_6 | hex | { 895c242c c744243000000000 ff15???????? 85c0 7eca } | |
| $sequence_7 | hex | { 5e 83c418 c3 33c9 33c0 8b542424 894c2410 } | |
| $sequence_8 | hex | { 50 56 6857340000 51 e8???????? } | |
| $sequence_9 | hex | { e8???????? 85c0 0f85e0000000 66a1???????? 53 56 57 } |
Condition
7 of them and filesize < 368640In plain words (Heuristic)
- The file must be smaller than 368640 (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: 2ffd1467-5498-56f3-a939-18fd49a9b53c
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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