win_jcry_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 win_jcry_auto {
  meta:
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    date               = "2020-10-14"
    version            = "1"
    description        = "autogenerated rule brought to you by yara-signator"
    tool               = "yara-signator v0.5.0"
    signator_config    = "callsandjumps;datarefs;binvalue"
    malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.jcry"
    malpedia_rule_date = "20201014"
    malpedia_hash      = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
    malpedia_version   = "20201014"
    malpedia_license   = "CC BY-SA 4.0"
    malpedia_sharing   = "TLP:WHITE"
  

  strings:
    $sequence_0 = { 8b 44 24 24 89 07 8d 05 60 43 4f 00 89 04 24 c7 44 24 04 0d 00 00 00 c7 44 24 08 00 00 00 00 }
                                $sequence_1 = { c7 44 24 04 00 00 00 00 e8 ?? ?? ?? ?? 8b 44 24 0c 8b 4c 24 08 8d 15 00 a4 4f 00 89 14 24 89 4c 24 04 }
                                    $sequence_2 = { 89 0c 24 8b 54 24 20 89 54 24 04 8d 1d e6 fd 50 00 89 5c 24 08 c7 44 24 0c 0a 00 00 00 e8 ?? ?? ?? ?? }
                                    $sequence_3 = { eb dd 89 44 24 34 8d 05 40 d3 4e 00 89 04 24 89 5c 24 04 89 54 24 08 89 6c 24 0c }
                                    $sequence_4 = { 0f 0b e8 ?? ?? ?? ?? 0f 0b 8d 05 bc 41 51 00 89 04 24 c7 44 24 04 1a 00 00 00 e8 ?? ?? ?? ?? }
                                    $sequence_5 = { 8b 4c 24 48 89 4c 24 2c 89 04 24 c7 44 24 04 04 00 00 00 8b 44 24 34 89 44 24 08 8b 44 24 30 }
                                    $sequence_6 = { 89 7c 24 34 8d 44 f1 08 8b 00 89 44 24 30 e8 ?? ?? ?? ?? 8d 05 27 84 51 00 89 04 24 }
                                    $sequence_7 = { 8b 44 24 68 83 f8 0a 0f 85 f8 03 00 00 8d 05 40 42 5e 00 89 04 24 e8 ?? ?? ?? ?? 8d 05 48 42 5e 00 }
                                    $sequence_8 = { 8b 6c 24 30 eb 93 8d 0d a0 27 50 00 89 0c 24 8b 6c 24 38 89 6c 24 04 }
                                $sequence_9 = { 8b 4c 24 3c 89 c2 89 c8 89 d1 e9 ?? ?? ?? ?? 8d 05 ae f6 50 00 b9 07 00 00 00 }
                
  condition:
    7 of them and filesize < 4137984
}

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

29c9de6b-7160-45b9-852f-0a4f270d7ee7

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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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