MALPEDIA_Win_Cobalt_Strike_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_Cobalt_Strike_Auto: FILE {
  meta:
    description        = "autogenerated rule brought to you by yara-signator"
    author             = "Felix Bilstein - yara-signator at cocacoding dot com"
    id                 = "fe16365e-18f7-5cb3-91e7-4778fbcc5b82"
    date               = "2023-12-06"
    modified           = "2023-12-08"
    reference          = "https://malpedia.caad.fkie.fraunhofer.de/details/win.cobalt_strike"
    source_url         = "https://github.com/malpedia/signator-rules//blob/fbacfc09b84d53d410385e66a8e56f25016c588a/rules/win.cobalt_strike_auto.yar#L1-L157"
    license_url        = "N/A"
    logic_hash         = "e575d34f1fe7007aa1601e291288f1136cef68df0b3f455e03eabc3d825e94fe"
    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  = { 3b c7 75 0d ff 15 ?? ?? ?? ?? 3d 33 27 00 00 }
    $sequence_1  = { e9 ?? ?? ?? ?? eb 0a b8 01 00 00 00 e9 ?? ?? ?? ?? }
    $sequence_2  = { eb 06 0f b6 c0 83 e0 7f 85 c0 74 5a }
    $sequence_3  = { eb 68 8b 45 d4 8b 48 2c 89 4d e0 8b 45 e0 }
    $sequence_4  = { ff 35 ?? ?? ?? ?? ff d6 5e e9 ?? ?? ?? ?? 55 }
    $sequence_5  = { eb 4e 83 f8 24 7f 09 c7 45 f4 03 00 00 00 }
    $sequence_6  = { ff 76 1c 83 c0 04 e8 ?? ?? ?? ?? 59 59 83 f8 ff }
    $sequence_7  = { f3 a6 74 4c 8b f0 6a 03 bf ?? ?? ?? ?? 59 }
    $sequence_8  = { 85 c0 74 1d ff 15 ?? ?? ?? ?? 85 c0 75 13 }
    $sequence_9  = { e9 ?? ?? ?? ?? 83 3d ?? ?? ?? ?? 01 75 05 e8 ?? ?? ?? ?? }
    $sequence_10 = { 8b d0 e8 ?? ?? ?? ?? 85 c0 7e 0e }
    $sequence_11 = { 85 c0 74 05 e8 ?? ?? ?? ?? 8b 0d ?? ?? ?? ?? 85 c9 }
    $sequence_12 = { f3 c3 cc 48 8b c4 48 89 58 08 48 89 68 10 48 89 70 18 }
    $sequence_13 = { c1 e9 03 ff c1 03 c1 3d 80 00 00 00 }
    $sequence_14 = { 49 ff c7 41 3b cc 72 e9 41 89 4d 00 }
    $sequence_15 = { 48 89 5c 24 48 48 89 5c 24 40 48 89 44 24 38 49 8b 06 }

  condition:
    7 of them and filesize < 1015808
}

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

a5150580-46ad-473c-9c3b-69594ea14582

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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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