MALPEDIA_Win_Hermes_Ransom_Auto

YARA detection rule by Felix Bilstein - yara-signator at cocacoding dot com · GPL-2.0

autogenerated rule brought to you by yara-signator

rule MALPEDIA_Win_Hermes_Ransom_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "88136c82-87ab-5f89-8963-9afb9534a540"
    date               = "2021-10-07"
    modified           = "2021-10-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.hermes_ransom"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.hermes_ransom_auto.yar#L1-L125"
    license_url        = "N/A"
    logic_hash         = "2bb9637b7e3ee9fcdd4e957eade001e8c8132e1b7c987ea6727ab44eda025915"
    score              = 75
    quality            = 75
    tags               = "FILE"
    version            = "1"
    tool               = "yara-signator v0.6.0"
    signator_config    = "callsandjumps;datarefs;binvalue"
    malpedia_rule_date = "20211007"
    malpedia_hash      = "e5b790e0f888f252d49063a1251ca60ec2832535"
    malpedia_version   = "20211008"
    malpedia_license   = "CC BY-SA 4.0"
    malpedia_sharing   = "TLP:WHITE"

  strings:
    $sequence_0 = { 59 59 89 45 e0 83 7d dc 00 75 06 83 7d e0 00 74 05 }
    $sequence_1 = { 8d 45 dc 50 ff 75 d8 8d 85 60 ff ff ff 50 ff 75 e0 ff 15 ?? ?? ?? ?? }
    $sequence_2 = { 33 c0 66 89 45 e2 33 c0 89 45 e4 89 45 e8 83 7d f0 20 }
    $sequence_3 = { 6a 00 8d 85 a4 f9 ff ff 50 ff 15 ?? ?? ?? ?? 5f 5e 8b e5 }
    $sequence_4 = { 0f b7 84 45 04 f7 ff ff 83 f8 3b 74 1f 8b 45 d8 8b 4d f0 66 8b 8c 4d 04 f7 ff ff }
    $sequence_5 = { 83 65 c8 00 83 65 d0 00 c7 45 b8 40 42 0f 00 83 65 e0 00 eb 07 8b 45 e0 40 }
    $sequence_6 = { 59 6b c9 00 66 89 81 e8 c3 40 00 6a 02 }
    $sequence_7 = { 59 59 6a 0f 6a 00 8d 45 bc 50 }
    $sequence_8 = { 83 65 f0 00 8b 45 f0 89 45 f8 83 7d f8 00 74 56 }
    $sequence_9 = { 83 e0 02 74 15 ff 75 0c ff 75 fc e8 ?? ?? ?? ?? 59 }

  condition:
    7 of them and filesize < 7192576
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

d4d8490c-092d-4c58-80b3-965c221f9fee

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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