YARA · Malpedia signator rules
MALPEDIA_Win_Dadjoke_Auto
autogenerated rule brought to you by yara-signator
MalwareDadjokeMalpedia 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 / 73
What this rule detects
autogenerated rule brought to you by yara-signator
Associated malware family: Dadjoke.
It defines 23 patterns (0 text, 23 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-dadjoke-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Dadjoke_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "e70c26e7-ab23-539f-9446-f64c119c6dd4"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.dadjoke"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.dadjoke_auto.yar#L1-L231"
= "N/A"
= "52eb13df90c67913476e398c58754b4e8e0394f30601d8e379450da51f4622c9"
= 75
= 73
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "TLP:WHITE"
strings:
$sequence_0 = { 56 57 6800081000 6a00 }
$sequence_1 = { 894808 8b95ecfeffff 89500c 8b8df0feffff 894810 c745e814000000 }
$sequence_2 = { 83c201 8955cc 8b45f8 8a08 }
$sequence_3 = { b941000000 f3a5 8b4dfc 81c104010000 894dfc 8b5508 }
$sequence_4 = { 8b55ac 895584 894d80 a1???????? 83c0ff 8945c8 }
$sequence_5 = { e8???????? 8945e8 837de8ff 7533 c645f300 }
$sequence_6 = { 8b0d???????? 51 e8???????? 83c414 eb1e }
$sequence_7 = { 6a00 ff15???????? e9???????? 8b4dd4 51 ff15???????? 8be5 }
$sequence_8 = { 33c9 84c0 0f94c1 8bc1 c3 a1???????? }
$sequence_9 = { 6a02 ff15???????? 85c0 7417 }
$sequence_10 = { 5e c3 8bff 55 8bec 83ec10 33c0 }
$sequence_11 = { e8???????? c3 6a04 e8???????? 59 c3 6a0c }
$sequence_12 = { 50 e8???????? 83c404 bf3e000000 }
$sequence_13 = { e8???????? 5e 5d c3 e8???????? 85c0 0f84d5480000 }
$sequence_14 = { 8d85f8feffff 68???????? 50 e8???????? 6804010000 }
$sequence_15 = { 85c0 0f85b5000000 50 ff15???????? 8d85e4faffff 50 68???????? }
$sequence_16 = { 741d 8d4588 50 6800100000 8d041e 50 }
$sequence_17 = { ff5108 8b3d???????? 8b1d???????? 51 e8???????? }
$sequence_18 = { 740d 803e4d 7508 807e015a }
$sequence_19 = { 6800400000 6800004000 56 ffd7 }
$sequence_20 = { 0f8241ffffff 68???????? e8???????? 8b75fc 83c404 }
$sequence_21 = { 00f8 e401 00ec e401 00dc e401 00ca }
$sequence_22 = { 33f6 8b45e4 83f810 720d 40 8d4dd0 50 }
condition:
7 of them and filesize < 344064
}
Strings (23 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 56 57 6800081000 6a00 } | |
| $sequence_1 | hex | { 894808 8b95ecfeffff 89500c 8b8df0feffff 894810 c745e814000000 } | |
| $sequence_2 | hex | { 83c201 8955cc 8b45f8 8a08 } | |
| $sequence_3 | hex | { b941000000 f3a5 8b4dfc 81c104010000 894dfc 8b5508 } | |
| $sequence_4 | hex | { 8b55ac 895584 894d80 a1???????? 83c0ff 8945c8 } | |
| $sequence_5 | hex | { e8???????? 8945e8 837de8ff 7533 c645f300 } | |
| $sequence_6 | hex | { 8b0d???????? 51 e8???????? 83c414 eb1e } | |
| $sequence_7 | hex | { 6a00 ff15???????? e9???????? 8b4dd4 51 ff15???????? 8be5 } | |
| $sequence_8 | hex | { 33c9 84c0 0f94c1 8bc1 c3 a1???????? } | |
| $sequence_9 | hex | { 6a02 ff15???????? 85c0 7417 } | |
| $sequence_10 | hex | { 5e c3 8bff 55 8bec 83ec10 33c0 } | |
| $sequence_11 | hex | { e8???????? c3 6a04 e8???????? 59 c3 6a0c } | |
| $sequence_12 | hex | { 50 e8???????? 83c404 bf3e000000 } | |
| $sequence_13 | hex | { e8???????? 5e 5d c3 e8???????? 85c0 0f84d5480000 } | |
| $sequence_14 | hex | { 8d85f8feffff 68???????? 50 e8???????? 6804010000 } | |
| $sequence_15 | hex | { 85c0 0f85b5000000 50 ff15???????? 8d85e4faffff 50 68???????? } | |
| $sequence_16 | hex | { 741d 8d4588 50 6800100000 8d041e 50 } | |
| $sequence_17 | hex | { ff5108 8b3d???????? 8b1d???????? 51 e8???????? } | |
| $sequence_18 | hex | { 740d 803e4d 7508 807e015a } | |
| $sequence_19 | hex | { 6800400000 6800004000 56 ffd7 } | |
| $sequence_20 | hex | { 0f8241ffffff 68???????? e8???????? 8b75fc 83c404 } | |
| $sequence_21 | hex | { 00f8 e401 00ec e401 00dc e401 00ca } | |
| $sequence_22 | hex | { 33f6 8b45e4 83f810 720d 40 8d4dd0 50 } |
Condition
7 of them and filesize < 344064In plain words (Heuristic)
- The file must be smaller than 344064 (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: e70c26e7-ab23-539f-9446-f64c119c6dd4
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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