DITEKSHEN_INDICATOR_SUSPICIOUS_EXE_Enable_Officemacro

YARA detection rule by ditekSHen · GPL-2.0

Detects Windows executables referencing Office macro registry keys. Observed modifying Office configurations via the registy to enable macros

rule DITEKSHEN_INDICATOR_SUSPICIOUS_EXE_Enable_Officemacro: FILE {
  meta:
    description = "Detects Windows executables referencing Office macro registry keys. Observed modifying Office configurations via the registy to enable macros"
    author      = "ditekSHen"
    id          = "2cd26bc8-33c7-5628-982f-dc59ce158082"
    date        = "2024-06-08"
    modified    = "2024-06-08"
    reference   = "https://github.com/ditekshen/detection"
    source_url  = "https://github.com/ditekshen/detection/blob/2ddbbe14eea1f342bca2cfd09a643a40ae2fcaf6/yara/indicator_suspicious.yar#L90-L108"
    license_url = "https://github.com/ditekshen/detection/blob/2ddbbe14eea1f342bca2cfd09a643a40ae2fcaf6/LICENSE.txt"
    logic_hash  = "18f66cff1fe2ab32366bf385bfe08f4895071c83e26812709eeb334857754c0f"
    score       = 40
    quality     = 39
    tags        = "FILE"
    importance  = 20

  strings:
    $s1 = "\\Word\\Security\\VBAWarnings" ascii wide
    $s2 = "\\PowerPoint\\Security\\VBAWarnings" ascii wide
    $s3 = "\\Excel\\Security\\VBAWarnings" ascii wide
    $h1 = "5c576f72645c53656375726974795c5642415761726e696e6773" nocase ascii wide
    $h2 = "5c506f776572506f696e745c53656375726974795c5642415761726e696e6773" nocase ascii wide
    $h3 = "5c5c457863656c5c5c53656375726974795c5c5642415761726e696e6773" nocase ascii wide
    $d1 = "5c%57%6f%72%64%5c%53%65%63%75%72%69%74%79%5c%56%42%41%57%61%72%6e%69%6e%67%73" nocase ascii
    $d2 = "5c%50%6f%77%65%72%50%6f%69%6e%74%5c%53%65%63%75%72%69%74%79%5c%56%42%41%57%61%72%6e%69%6e%67%73" nocase ascii
    $d3 = "5c%5c%45%78%63%65%6c%5c%5c%53%65%63%75%72%69%74%79%5c%5c%56%42%41%57%61%72%6e%69%6e%67%73" nocase ascii

  condition:
    uint16(0) == 0x5a4d and (2 of ($s*) or 2 of ($h*) or 2 of ($d*))
}

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

3505214b-7927-486d-8f10-1584fbe00f0e

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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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