MALPEDIA_Win_Retefe_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_Retefe_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "f3caa6e6-3618-52a1-825b-c9f70c1ac6ab"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.retefe"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.retefe_auto.yar#L1-L263"
    license_url        = "N/A"
    logic_hash         = "60c0df86aaa8e365109479b1ca3f3fca53ccf95fd2fbd33ae20876e0704e51b2"
    score              = 75
    quality            = 73
    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  = { 6a 00 6a 01 ff 15 ?? ?? ?? ?? 8b f0 85 f6 74 10 6a 09 }
    $sequence_1  = { 51 8b f8 ff d6 85 c0 }
    $sequence_2  = { 68 f5 00 00 00 50 ff 15 ?? ?? ?? ?? b8 01 00 00 00 }
    $sequence_3  = { e8 ?? ?? ?? ?? 6a 08 e8 ?? ?? ?? ?? 89 46 04 }
    $sequence_4  = { 6a 24 6a 5a 6a 24 e8 ?? ?? ?? ?? 81 c4 94 00 00 00 }
    $sequence_5  = { 8b 4e 04 89 01 8b 4e 04 33 c0 83 c4 04 39 41 04 }
    $sequence_6  = { 6a 0e 6a eb 6a 1a 6a 96 6a 0d }
    $sequence_7  = { 89 46 04 83 c4 04 8b c6 e8 ?? ?? ?? ?? }
    $sequence_8  = { 51 ff 15 ?? ?? ?? ?? 8b 95 d8 ef ff ff 50 52 ff 15 ?? ?? ?? ?? 50 }
    $sequence_9  = { 52 e8 ?? ?? ?? ?? 8b 4e 04 89 01 }
    $sequence_10 = { 6a d1 6a 1a 6a 55 6a d7 6a d1 }
    $sequence_11 = { 88 0c 10 8b 4e 04 40 3b 41 04 }
    $sequence_12 = { 50 e8 ?? ?? ?? ?? 83 c4 08 e8 ?? ?? ?? ?? 99 b9 60 f5 90 00 }
    $sequence_13 = { 8b ec 83 7d 0c 00 74 09 b8 0b 00 02 80 }
    $sequence_14 = { 56 33 f6 8b 86 a0 bf 42 00 85 c0 74 0e }
    $sequence_15 = { 43 85 ff 0f 85 1f ff ff ff 5f }
    $sequence_16 = { 6a 00 ff b4 24 24 20 00 00 e8 ?? ?? ?? ?? 8b 8c 24 18 20 00 00 }
    $sequence_17 = { 8b 04 95 a0 bf 42 00 f6 44 08 28 01 74 21 57 e8 ?? ?? ?? ?? }
    $sequence_18 = { 46 85 f6 74 10 83 fe 01 75 a0 }
    $sequence_19 = { 0f b6 11 0f b6 c0 eb 17 81 fa 00 01 00 00 73 13 8a 87 cc b1 42 00 }
    $sequence_20 = { 8b 74 24 14 85 f6 75 53 32 c0 }
    $sequence_21 = { 57 81 fb 00 02 00 00 0f 8d aa 00 00 00 68 00 08 00 00 }
    $sequence_22 = { 8b 42 18 a3 ?? ?? ?? ?? 8b 4a 08 89 0d ?? ?? ?? ?? 8b 42 0c }
    $sequence_23 = { 33 c0 66 89 06 8b 7c 24 14 8d 5f 20 }
    $sequence_24 = { e8 ?? ?? ?? ?? 8b 40 4c 83 b8 a8 00 00 00 00 75 12 8b 04 bd a0 bf 42 00 80 7c 30 29 00 75 04 }
    $sequence_25 = { 88 04 8d 93 40 43 00 88 04 8d 92 3c 43 00 84 d2 74 12 }
    $sequence_26 = { 8b 70 04 8b 38 4e 8b ce e8 ?? ?? ?? ?? }
    $sequence_27 = { 8b 4d 08 85 c9 75 12 e8 ?? ?? ?? ?? 5e }
    $sequence_28 = { 5f 89 4d f0 8b 34 cd 58 22 41 00 8b 4d 08 6a 5a 2b ce }

  condition:
    7 of them and filesize < 843776
}

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

88ec1ee6-a723-4636-9f52-8169ff251815

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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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