MALPEDIA_Win_Fanny_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_Fanny_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "cd0c75da-8b4c-5363-98ec-15a67064033c"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.fanny"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.fanny_auto.yar#L1-L171"
    license_url        = "N/A"
    logic_hash         = "415f51a7b92a8dd2e587e9f69b01a611a89ad0fc5dace80d2d81091a3ef0d182"
    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 45 c0 85 c0 74 22 89 35 ?? ?? ?? ?? 6a 00 }
    $sequence_1  = { 89 55 d0 0f b6 45 cf 3d e9 00 00 00 74 23 0f b6 4d cf }
    $sequence_2  = { 8b 4d fc 8b 11 52 ff 15 ?? ?? ?? ?? 85 c0 75 02 }
    $sequence_3  = { 53 ff 15 ?? ?? ?? ?? 8b f0 83 c4 20 85 f6 0f 84 6a 01 00 00 }
    $sequence_4  = { 8b 45 0c 89 45 d4 c7 45 c4 00 00 00 00 8b 4d c4 3b 4d d0 7d 26 6a 00 }
    $sequence_5  = { 53 ff 15 ?? ?? ?? ?? 8b f0 85 f6 74 20 6a 03 }
    $sequence_6  = { eb 05 1b c0 83 d8 ff 85 c0 75 17 8b 84 24 18 01 00 00 }
    $sequence_7  = { eb 57 8b 45 0c 8a 4d d0 88 48 1f 8b 55 d0 52 8b 45 10 }
    $sequence_8  = { 8b 4d fc c7 41 0c 00 00 00 00 ff 15 ?? ?? ?? ?? 8b 55 fc }
    $sequence_9  = { 53 ff 15 ?? ?? ?? ?? be 00 00 02 00 56 }
    $sequence_10 = { 5b c9 c3 80 a5 dc fe ff ff 00 }
    $sequence_11 = { 50 e8 ?? ?? ?? ?? 83 c4 24 eb 03 8b 75 08 }
    $sequence_12 = { 53 ff 15 ?? ?? ?? ?? 8d 85 e8 fd ff ff 50 ff 15 ?? ?? ?? ?? }
    $sequence_13 = { 68 00 40 00 00 6a 00 ff 15 ?? ?? ?? ?? 89 7c 24 10 56 }
    $sequence_14 = { 53 ff 15 ?? ?? ?? ?? 8b f0 59 85 f6 0f 84 e9 00 00 00 8a 45 08 }
    $sequence_15 = { 33 c0 83 e1 03 f3 a4 8b 13 8b 4d 00 85 d2 76 0e }

  condition:
    7 of them and filesize < 368640
}

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

211c802e-009f-4b64-85a7-eac9c9c9b9f5

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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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