HARFANGLAB_Samecoin_Campaign_Loader

YARA detection rule by HarfangLab · GPL-2.0

Matches the loader used in the SameCoin campaign

rule HARFANGLAB_Samecoin_Campaign_Loader: FILE {
  meta:
    description = "Matches the loader used in the SameCoin campaign"
    author      = "HarfangLab"
    id          = "ab4d59f6-300d-5cdf-b91f-87f8cc1f0eac"
    date        = "2024-02-13"
    modified    = "2024-04-05"
    reference   = "TRR240201"
    source_url  = "https://github.com/HarfangLab/iocs/blob/f679751df7994790f9f79629d60b3f2623148255/TRR240201/trr240201_yara.yar#L1-L21"
    license_url = "N/A"
    hash        = "cff976d15ba6c14c501150c63b69e6c06971c07f8fa048a9974ecf68ab88a5b6"
    logic_hash  = "7df04ab208d2caa5a137b1c3481ef734df54bbe8330979f524b16e9ba8cf48d5"
    score       = 75
    quality     = 80
    tags        = "FILE"
    context     = "file"

  strings:
    $hebrew_layout = "0000040d" fullword ascii
    $runas         = "runas" fullword ascii
    $jpg_magic     = { FF D8 FF E0 00 10 4A 46 49 46 00 01 }
    $wl_1          = "C:\\Users\\Public\\Microsoft Connection Agent.jpg" ascii
    $wl_2          = "C:\\Users\\Public\\Video.mp4" ascii
    $wl_3          = "C:\\Users\\Public\\Microsoft System Agent.exe" ascii
    $wl_4          = "C:\\Users\\Public\\Microsoft System Manager.exe" ascii
    $wl_5          = "C:\\Users\\Public\\Windows Defender Agent.exe"

  condition:
    uint16(0) == 0x5A4D and filesize > 5MB and filesize < 7MB and $hebrew_layout and $runas and $jpg_magic and 3 of ($wl_*)
}

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

10779493-2d0a-4e1e-8a43-1050c2191f1f

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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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