MALPEDIA_Win_Ketrum_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_Ketrum_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "675a5c68-35f7-5e7a-83cc-0627e32f2bf0"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.ketrum"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.ketrum_auto.yar#L1-L174"
    license_url        = "N/A"
    logic_hash         = "b179771de79024de54f910e3eea2ec187acafed93fd395a9caebde5421ab28f1"
    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  = { 83 e1 3f 5f 3b c8 72 03 }
    $sequence_1  = { 8d 85 fc eb ff ff 50 8d 85 fc d3 ff ff 68 ?? ?? ?? ?? 50 ff d7 }
    $sequence_2  = { ff 15 ?? ?? ?? ?? ff b5 f0 cb ff ff ff 15 ?? ?? ?? ?? ff b5 e8 cb ff ff ff b5 f4 cb ff ff }
    $sequence_3  = { ab ab ab ab 68 ?? ?? ?? ?? 6a 15 bf ?? ?? ?? ?? }
    $sequence_4  = { e8 ?? ?? ?? ?? 59 85 db 7e 15 57 8b 7d 08 2b fe }
    $sequence_5  = { 33 c0 0f b7 f0 8b c6 c1 e6 10 ba ?? ?? ?? ?? }
    $sequence_6  = { 74 34 b9 ?? ?? ?? ?? 8b c1 8d 70 01 8a 10 40 }
    $sequence_7  = { 85 c0 74 04 33 c0 eb 5e 68 80 00 00 00 56 }
    $sequence_8  = { 39 70 10 76 99 83 7b 14 08 72 04 8b 13 eb 02 }
    $sequence_9  = { 8a 4c 18 1c 88 88 b0 f7 41 00 40 eb e9 33 c0 89 45 e4 }
    $sequence_10 = { 6a 04 8d 85 20 ef ff ff 50 6a 1f 57 }
    $sequence_11 = { 8b 8d a4 fd ff ff 2b c1 2b c6 50 03 ce 51 }
    $sequence_12 = { 3b f9 73 2c 8b 16 3b d7 77 26 8b c7 2b c2 }
    $sequence_13 = { 83 65 fc 00 83 c0 74 50 8b 45 08 e8 ?? ?? ?? ?? }
    $sequence_14 = { 89 a5 70 fe ff ff 6a 0f 5f 89 7e 14 89 5e 10 }
    $sequence_15 = { 33 ff 8d 75 9c e8 ?? ?? ?? ?? 33 c0 40 e8 ?? ?? ?? ?? }

  condition:
    7 of them and filesize < 4599808
}

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

2e226820-09c3-4fa1-9712-768dca8eb2ee

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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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