MALPEDIA_Win_Entryshell_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_Entryshell_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "602f60d0-cc33-528b-8fdb-8d928745f559"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.entryshell"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.entryshell_auto.yar#L1-L129"
    license_url        = "N/A"
    logic_hash         = "870b124d6520583c6a18845739a5248302a0431048dbb7822501065378b2f353"
    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 = { 85 db 75 17 53 8d 95 e4 df ff ff 8b 8d 8c dd ff ff }
    $sequence_1 = { 77 1d 8d 82 90 c7 25 01 8d 50 01 66 0f 1f 44 00 00 }
    $sequence_2 = { 83 c4 0c 8d 84 24 a8 08 00 00 50 68 04 01 00 00 ff 15 ?? ?? ?? ?? 8d 44 24 50 50 }
    $sequence_3 = { 8b 46 f8 0f b6 84 05 4f ff ff ff 88 42 fd 83 ef 01 75 a1 0f 10 03 53 }
    $sequence_4 = { 83 c4 04 84 c0 0f 84 95 01 00 00 8b bd f4 ef ff ff 85 ff 0f 84 ee fc ff ff 6a 20 }
    $sequence_5 = { e8 ?? ?? ?? ?? 59 83 cf ff 89 7d e4 33 c9 89 4d fc 8b 04 9d 78 51 25 01 }
    $sequence_6 = { 89 45 f8 53 8b 5d 08 0f 57 c0 56 57 89 5d e8 }
    $sequence_7 = { 83 c4 0c 8d 4f fe 66 8b 41 02 8d 49 02 66 85 c0 75 f4 e9 ?? ?? ?? ?? }
    $sequence_8 = { 8a 04 45 39 9f 24 01 eb 02 32 c0 0f b6 4d 0c 0f b6 c0 6b c0 09 03 c1 }
    $sequence_9 = { 02 d2 02 90 13 80 00 00 02 d2 02 90 14 80 00 00 02 d2 02 90 15 80 00 00 02 d2 }

  condition:
    7 of them and filesize < 663552
}

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

86af46e0-fab4-477d-9389-97985f9d3380

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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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