YARA · Malpedia signator rules
MALPEDIA_Win_Anatova_Ransom_Auto
autogenerated rule brought to you by yara-signator
MalwareAnatova RansomMalpedia 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: Anatova Ransom.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-anatova-ransom-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Anatova_Ransom_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "99b5620c-2809-5718-a8d2-ffcd23ba1221"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.anatova_ransom"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.anatova_ransom_auto.yar#L1-L129"
= "N/A"
= "bab7007d43a9262ad7ed85d1f30bb567a3a4c3cf4ff5544e602218a6885ef00a"
= 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 = { 83f800 0f8454010000 488d85d4fdffff 4989c3 488d058f410000 }
$sequence_1 = { 4c89d1 4c89da 4c8b1d???????? 41ffd3 e9???????? 48b80000000000000000 c9 }
$sequence_2 = { 4989c2 4c89d1 4c89da 4c8b1d???????? 41ffd3 0fb6c0 488b45a8 }
$sequence_3 = { 488d058f410000 4989c2 4c89d1 4c89da 4c8b1d???????? 41ffd3 83f800 }
$sequence_4 = { b807000000 884590 b809000000 884591 b80e000000 884592 b803000000 }
$sequence_5 = { 488d0513300000 488945a0 488d0517300000 488945a8 }
$sequence_6 = { 4c89da e8???????? 488d053ffdffff 488d0dc8a0ffff 29c8 488d4de0 4989c9 }
$sequence_7 = { b814010000 4889442428 488d056e570000 4889442420 b800000000 4989c1 488d058e580000 }
$sequence_8 = { 0fbe01 83f005 8801 ebdb 488b45e8 4989c2 4c89d1 }
$sequence_9 = { 4889c1 83c001 8945d4 ebe1 b800000000 4889442428 48b80000000000000000 }
condition:
7 of them and filesize < 671744
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 83f800 0f8454010000 488d85d4fdffff 4989c3 488d058f410000 } | |
| $sequence_1 | hex | { 4c89d1 4c89da 4c8b1d???????? 41ffd3 e9???????? 48b80000000000000000 c9 } | |
| $sequence_2 | hex | { 4989c2 4c89d1 4c89da 4c8b1d???????? 41ffd3 0fb6c0 488b45a8 } | |
| $sequence_3 | hex | { 488d058f410000 4989c2 4c89d1 4c89da 4c8b1d???????? 41ffd3 83f800 } | |
| $sequence_4 | hex | { b807000000 884590 b809000000 884591 b80e000000 884592 b803000000 } | |
| $sequence_5 | hex | { 488d0513300000 488945a0 488d0517300000 488945a8 } | |
| $sequence_6 | hex | { 4c89da e8???????? 488d053ffdffff 488d0dc8a0ffff 29c8 488d4de0 4989c9 } | |
| $sequence_7 | hex | { b814010000 4889442428 488d056e570000 4889442420 b800000000 4989c1 488d058e580000 } | |
| $sequence_8 | hex | { 0fbe01 83f005 8801 ebdb 488b45e8 4989c2 4c89d1 } | |
| $sequence_9 | hex | { 4889c1 83c001 8945d4 ebe1 b800000000 4889442428 48b80000000000000000 } |
Condition
7 of them and filesize < 671744In plain words (Heuristic)
- The file must be smaller than 671744 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
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: 99b5620c-2809-5718-a8d2-ffcd23ba1221
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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