YARA · Malpedia signator rules
MALPEDIA_Win_Cicada3301_Auto
autogenerated rule brought to you by yara-signator
MalwareCicada3301Malpedia 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: Cicada3301.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-cicada3301-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Cicada3301_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "f61ae320-9d9a-50b0-b111-80302728896c"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.cicada3301"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.cicada3301_auto.yar#L1-L134"
= "N/A"
= "7fd7553441050010b234608d074a06e5ba5c4250e4845be3d86d81d102460ad6"
= 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 = { f30fbcd2 4801ca 4821fa 41807c150000 0f88ecfeffff 66410f6f4500 660fd7c8 }
$sequence_1 = { e8???????? 85c0 0f84d9090000 4c89e1 e8???????? e9???????? 4c89742448 }
$sequence_2 = { e8???????? 4889f9 4889f2 4989d8 e8???????? eb7b 0f10842490040000 }
$sequence_3 = { f3440f6f0438 66410f6fc0 660f74c7 66440fd7f0 4585f6 7533 66440f74c6 }
$sequence_4 = { f390 83c1f8 75eb 83e005 74ab 660f1f440000 f390 }
$sequence_5 = { bad0010000 480f44d7 41b808000000 e8???????? 488b9660010000 4889d8 4889f1 }
$sequence_6 = { f3420f6f0c0f f3410f6f10 660f6fda 660f60d8 660f70db4e f20f70db1b f30f70db1b }
$sequence_7 = { f3410f7e10 660f60d0 660f70d24e f20f70d21b f30f70d21b 660f67d2 660fd61413 }
$sequence_8 = { f3450f58c0 f3440f5ec6 f3440f59c1 f3440f5cc7 ffc1 0f28f9 410f28c8 }
$sequence_9 = { e9???????? 89f0 31d2 41f7f6 4885d2 741e bf02000000 }
condition:
7 of them and filesize < 11247616
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { f30fbcd2 4801ca 4821fa 41807c150000 0f88ecfeffff 66410f6f4500 660fd7c8 } | |
| $sequence_1 | hex | { e8???????? 85c0 0f84d9090000 4c89e1 e8???????? e9???????? 4c89742448 } | |
| $sequence_2 | hex | { e8???????? 4889f9 4889f2 4989d8 e8???????? eb7b 0f10842490040000 } | |
| $sequence_3 | hex | { f3440f6f0438 66410f6fc0 660f74c7 66440fd7f0 4585f6 7533 66440f74c6 } | |
| $sequence_4 | hex | { f390 83c1f8 75eb 83e005 74ab 660f1f440000 f390 } | |
| $sequence_5 | hex | { bad0010000 480f44d7 41b808000000 e8???????? 488b9660010000 4889d8 4889f1 } | |
| $sequence_6 | hex | { f3420f6f0c0f f3410f6f10 660f6fda 660f60d8 660f70db4e f20f70db1b f30f70db1b } | |
| $sequence_7 | hex | { f3410f7e10 660f60d0 660f70d24e f20f70d21b f30f70d21b 660f67d2 660fd61413 } | |
| $sequence_8 | hex | { f3450f58c0 f3440f5ec6 f3440f59c1 f3440f5cc7 ffc1 0f28f9 410f28c8 } | |
| $sequence_9 | hex | { e9???????? 89f0 31d2 41f7f6 4885d2 741e bf02000000 } |
Condition
7 of them and filesize < 11247616In plain words (Heuristic)
- The file must be smaller than 11247616 (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: f61ae320-9d9a-50b0-b111-80302728896c
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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