StealcV2

YARA detection rule by kevoreilly · NOASSERTION

Stealc V2 Payload

rule StealcV2
{
    meta:
        author = "kevoreilly"
        description = "Stealc V2 Payload"
        cape_type = "Stealc Payload"
        packed = "2f42dcf05dd87e6352491ff9d4ea3dc3f854df53d548a8da0c323be42df797b6"
        packed = "8301936f439f43579cffe98e11e3224051e2fb890ffe9df680bbbd8db0729387"
    strings:
        $decode32 = {AB AB AB AB 8B 45 0C 89 4E 10 89 4E 14 39 45 08 75 0B C7 46 14 0F 00 00 00 88 0E EB 0F 2B 45 08 50 51 FF 75 ?? 8B}
        $dump32 = {33 C0 89 46 30 88 46 34 89 46 38 89 46 3C 89 46 40 89 46 44 89 46 48 89 46 4C 89 46 50 89 46 54 89 46 58 8B C6 5F 5E C3}
        $date32 = {F3 A5 8D 45 ?? 50 E8 [4] 59 8B F8 8B F2 8D 45 A4 50 E8 [4] 59 3B F2 7C 08 7F 04 3B F8 76 02 B3 01 8A C3}
        $decode64 = {40 53 48 83 EC 20 48 8B 19 48 85 DB 74 ?? 48 8B 53 18 48 83 FA 0F 76 2C 48 8B 0B 48 FF C2 48 81 FA 00 10 00 00 72}
        $dump64 = {48 8B C7 89 6F 40 40 88 6F 44 48 89 6F 48 48 89 6F 50 48 89 6F 58 48 89 6F 60 48 89 6F 68 48 89 6F 70 48 89 6F 78 48 89}
        $date64 = {0F 11 44 [2] 0F 11 8C [2] 00 00 00 89 8C [2] 00 00 00 48 8D 4C [2] E8 [4] 48 8B D8 48 8D 4C [2] E8 [4] 48 3B D8 0F 9F C0}
    condition:
        uint16(0) == 0x5A4D and 2 of them
}

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

d28a908f-8094-4ea6-baee-a86b6686fd3a

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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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