YARA · Malpedia signator rules
MALPEDIA_Win_Corebot_Auto
autogenerated rule brought to you by yara-signator
MalwareCorebotMalpedia 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: Corebot.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-corebot-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Corebot_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "1723e0b5-2dab-5f71-9fd6-15428095eba6"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.corebot"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.corebot_auto.yar#L1-L163"
= "N/A"
= "bddd32fd592a01329ed3fdb297d89b24412a75d1af8c5ce6d6d329923dbc9b66"
= 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 = { be07000000 8d4801 894dd8 0fb600 8945e8 }
$sequence_1 = { 83e601 31c0 40 8932 }
$sequence_2 = { 31c0 83fe18 72ee 39fe }
$sequence_3 = { e8???????? 83c404 29f7 01f3 }
$sequence_4 = { 55 89e5 56 8b31 85f6 7410 89f1 }
$sequence_5 = { c745ec07000000 8d0412 84d2 8945e8 }
$sequence_6 = { 01f3 8b75ec 56 8945f0 50 57 53 }
$sequence_7 = { 50 57 53 e8???????? 83c410 83f8ff }
$sequence_8 = { eb10 6800800000 6a00 56 }
$sequence_9 = { ff764c ff15???????? 8d4634 50 ff15???????? 8d4e0c e8???????? }
$sequence_10 = { 85ff 740f 57 ff7508 }
$sequence_11 = { ff15???????? 807e5000 7509 ff764c ff15???????? 8d4634 }
$sequence_12 = { ff742420 ff742428 e8???????? 8b442424 8d4c2410 }
$sequence_13 = { 807e5800 7509 ff7654 ff15???????? 807e5000 7509 }
$sequence_14 = { ff7010 ff7014 e8???????? 8b45e0 }
$sequence_15 = { 85c0 7515 8b4624 3b4620 }
condition:
7 of them and filesize < 1302528
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { be07000000 8d4801 894dd8 0fb600 8945e8 } | |
| $sequence_1 | hex | { 83e601 31c0 40 8932 } | |
| $sequence_2 | hex | { 31c0 83fe18 72ee 39fe } | |
| $sequence_3 | hex | { e8???????? 83c404 29f7 01f3 } | |
| $sequence_4 | hex | { 55 89e5 56 8b31 85f6 7410 89f1 } | |
| $sequence_5 | hex | { c745ec07000000 8d0412 84d2 8945e8 } | |
| $sequence_6 | hex | { 01f3 8b75ec 56 8945f0 50 57 53 } | |
| $sequence_7 | hex | { 50 57 53 e8???????? 83c410 83f8ff } | |
| $sequence_8 | hex | { eb10 6800800000 6a00 56 } | |
| $sequence_9 | hex | { ff764c ff15???????? 8d4634 50 ff15???????? 8d4e0c e8???????? } | |
| $sequence_10 | hex | { 85ff 740f 57 ff7508 } | |
| $sequence_11 | hex | { ff15???????? 807e5000 7509 ff764c ff15???????? 8d4634 } | |
| $sequence_12 | hex | { ff742420 ff742428 e8???????? 8b442424 8d4c2410 } | |
| $sequence_13 | hex | { 807e5800 7509 ff7654 ff15???????? 807e5000 7509 } | |
| $sequence_14 | hex | { ff7010 ff7014 e8???????? 8b45e0 } | |
| $sequence_15 | hex | { 85c0 7515 8b4624 3b4620 } |
Condition
7 of them and filesize < 1302528In plain words (Heuristic)
- The file must be smaller than 1302528 (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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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
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: 1723e0b5-2dab-5f71-9fd6-15428095eba6
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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