Equation_Kaspersky_SuspiciousString

YARA detection rule by Florian Roth · GPL-2.0

Equation Group Malware - suspicious string found in sample

rule Equation_Kaspersky_SuspiciousString 
{
  
    meta:
        description = "Equation Group Malware - suspicious string found in sample"
        author = "Florian Roth"
        reference = "http://goo.gl/ivt8EW"
        date = "2015/02/17"
        score = 60
   
    strings:
        $mz = { 4d 5a }
        $s1 = "i386\\DesertWinterDriver.pdb" fullword
        $s2 = "Performing UR-specific post-install..."
        $s3 = "Timeout waiting for the \"canInstallNow\" event from the implant-specific EXE!"
        $s4 = "STRAITSHOOTER30.exe"
        $s5 = "standalonegrok_2.1.1.1"
        $s6 = "c:\\users\\rmgree5\\"
    
    condition:
        ( $mz at 0 ) and filesize < 500000 and all of ($s*)
}

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

0df83302-76f1-460a-ab75-60c5fa002403

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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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