YARA · Malpedia signator rules
MALPEDIA_Win_Mylobot_Auto
autogenerated rule brought to you by yara-signator
MalwareMylobotMalpedia 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: Mylobot.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-mylobot-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Mylobot_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "3367c4b8-2e00-50bb-8106-f7bfa38e7fdb"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.mylobot"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.mylobot_auto.yar#L1-L168"
= "N/A"
= "dfa8c9d0c20f16c0183dd13cc15d32e5e1ca0cab59c086be613c6143f9ccb393"
= 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 = { ff5068 5f 5e c3 }
$sequence_1 = { 8981f8000000 55 8d442414 50 68???????? }
$sequence_2 = { 8938 56 ff15???????? 8bc7 5f 5e }
$sequence_3 = { 5d c3 8b54240c 8b442404 56 8bf0 }
$sequence_4 = { a3???????? a1???????? 68???????? 56 56 ff501c }
$sequence_5 = { ff75f8 ff9100010000 33c0 85f6 7507 837df001 0f94c0 }
$sequence_6 = { ffd3 8b0d???????? 55 89812c010000 8d442414 50 }
$sequence_7 = { 50 50 6a1a 50 a1???????? ff9038010000 }
$sequence_8 = { 51 51 6800000004 51 51 }
$sequence_9 = { 03c7 8955f8 3bd0 7356 90 }
$sequence_10 = { 33ff 8bd8 8d8d3af1ffff 33c0 57 51 }
$sequence_11 = { 57 51 66898538f1ffff e8???????? 83c40c }
$sequence_12 = { 68fe070000 52 8d8562f7ffff 50 66899560f7ffff }
$sequence_13 = { 85c0 7477 8b4d08 8b550c }
$sequence_14 = { 741c 8d431c e8???????? 8b5318 }
$sequence_15 = { 83f8ff 7554 6a01 6a08 ff15???????? 8d9558f5ffff }
condition:
7 of them and filesize < 8028160
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { ff5068 5f 5e c3 } | |
| $sequence_1 | hex | { 8981f8000000 55 8d442414 50 68???????? } | |
| $sequence_2 | hex | { 8938 56 ff15???????? 8bc7 5f 5e } | |
| $sequence_3 | hex | { 5d c3 8b54240c 8b442404 56 8bf0 } | |
| $sequence_4 | hex | { a3???????? a1???????? 68???????? 56 56 ff501c } | |
| $sequence_5 | hex | { ff75f8 ff9100010000 33c0 85f6 7507 837df001 0f94c0 } | |
| $sequence_6 | hex | { ffd3 8b0d???????? 55 89812c010000 8d442414 50 } | |
| $sequence_7 | hex | { 50 50 6a1a 50 a1???????? ff9038010000 } | |
| $sequence_8 | hex | { 51 51 6800000004 51 51 } | |
| $sequence_9 | hex | { 03c7 8955f8 3bd0 7356 90 } | |
| $sequence_10 | hex | { 33ff 8bd8 8d8d3af1ffff 33c0 57 51 } | |
| $sequence_11 | hex | { 57 51 66898538f1ffff e8???????? 83c40c } | |
| $sequence_12 | hex | { 68fe070000 52 8d8562f7ffff 50 66899560f7ffff } | |
| $sequence_13 | hex | { 85c0 7477 8b4d08 8b550c } | |
| $sequence_14 | hex | { 741c 8d431c e8???????? 8b5318 } | |
| $sequence_15 | hex | { 83f8ff 7554 6a01 6a08 ff15???????? 8d9558f5ffff } |
Condition
7 of them and filesize < 8028160In plain words (Heuristic)
- The file must be smaller than 8028160 (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: 3367c4b8-2e00-50bb-8106-f7bfa38e7fdb
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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