MALPEDIA_Win_Ransoc_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_Ransoc_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "961c0c93-e6c6-5111-8367-8742ed436406"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.ransoc"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.ransoc_auto.yar#L1-L122"
    license_url        = "N/A"
    logic_hash         = "2d366ed2132c1270c1bab4c471d75e367a89089f653123f697fac204fd95b124"
    score              = 75
    quality            = 75
    tags               = "FILE"
    version            = "1"
    tool               = "yara-signator v0.6.0"
    signator_config    = "callsandjumps;datarefs;binvalue"
    malpedia_rule_date = "20231130"
    malpedia_hash      = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351"
    malpedia_version   = "20230808"
    malpedia_license   = "CC BY-SA 4.0"
    malpedia_sharing   = "TLP:WHITE"

  strings:
    $sequence_0 = { 8b 57 3c 50 57 ff d2 ff 4e 3c 8b 46 2c 8b 4e 3c }
    $sequence_1 = { 8b f0 8b 56 30 57 8d 7e 30 }
    $sequence_2 = { 89 42 40 8b 50 40 89 51 40 3b d7 74 1e }
    $sequence_3 = { 89 70 3c 8b 51 34 89 50 30 3b d7 74 06 8b 51 34 }
    $sequence_4 = { 85 c0 75 f2 8b 71 40 85 f6 75 8b 68 ?? ?? ?? ?? }
    $sequence_5 = { 74 0f 83 f9 07 74 0a 83 f9 06 }
    $sequence_6 = { 89 46 2c a8 20 74 06 8b 46 04 01 48 04 8b 46 2c a9 00 08 00 00 }
    $sequence_7 = { 89 51 48 8b 48 30 85 c9 74 06 8b 50 34 89 51 34 8b 48 34 }
    $sequence_8 = { 83 c4 08 c3 6a 00 6a 01 55 }
    $sequence_9 = { 8b 56 e4 89 54 24 14 8d 5c 24 10 89 1a 89 44 24 10 8b 50 04 89 56 e4 }

  condition:
    7 of them and filesize < 958464
}

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

51836641-41c4-4c8f-9aed-8fc2f438c002

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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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