YARA · Malpedia signator rules
MALPEDIA_Win_Rockloader_Auto
autogenerated rule brought to you by yara-signator
MalwareRockloaderMalpedia 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: Rockloader.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-rockloader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Rockloader_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "3b6fe0be-24e2-5fa5-9c6b-c51e1d1c929d"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.rockloader"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.rockloader_auto.yar#L1-L117"
= "N/A"
= "793503e3062a6c8d1d48d29e6bfc48b2bfbd7ddb06209354c6c109f6ca1d96d0"
= 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 = { 8945f8 eb07 c745ec01000000 8b36 85f6 }
$sequence_1 = { 8d44c1a9 c3 33c0 c3 }
$sequence_2 = { eb07 50 ff15???????? 8bf0 85f6 7507 33c0 }
$sequence_3 = { 8d45ec 50 8d85a0f7ffff 50 }
$sequence_4 = { ff7508 8bc6 e8???????? eb40 }
$sequence_5 = { 46 80382d 750a dd05???????? 40 dd5de4 }
$sequence_6 = { 7f09 0fbec9 8d44c1d0 eb24 80f941 7c0e 80f946 }
$sequence_7 = { 66c7075d00 8bc6 5f 5e 5b }
$sequence_8 = { 3b75f4 7ce9 ff75f8 ff15???????? }
$sequence_9 = { 3c30 7c04 3c39 7e2a 3c5b 750c 8b4d08 }
condition:
7 of them and filesize < 98304
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8945f8 eb07 c745ec01000000 8b36 85f6 } | |
| $sequence_1 | hex | { 8d44c1a9 c3 33c0 c3 } | |
| $sequence_2 | hex | { eb07 50 ff15???????? 8bf0 85f6 7507 33c0 } | |
| $sequence_3 | hex | { 8d45ec 50 8d85a0f7ffff 50 } | |
| $sequence_4 | hex | { ff7508 8bc6 e8???????? eb40 } | |
| $sequence_5 | hex | { 46 80382d 750a dd05???????? 40 dd5de4 } | |
| $sequence_6 | hex | { 7f09 0fbec9 8d44c1d0 eb24 80f941 7c0e 80f946 } | |
| $sequence_7 | hex | { 66c7075d00 8bc6 5f 5e 5b } | |
| $sequence_8 | hex | { 3b75f4 7ce9 ff75f8 ff15???????? } | |
| $sequence_9 | hex | { 3c30 7c04 3c39 7e2a 3c5b 750c 8b4d08 } |
Condition
7 of them and filesize < 98304In plain words (Heuristic)
- The file must be smaller than 98304 (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: 3b6fe0be-24e2-5fa5-9c6b-c51e1d1c929d
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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