solarmarker_March2022

YARA detection rule by Lucas Acha (http://www.lukeacha.com) · GPL-2.0

observed strings with malicious DLL loaded by Soalrmarker Malware during March 2022 campaign

rule solarmarker_March2022
{

  meta:
      author = "Lucas Acha (http://www.lukeacha.com)"
      description = "observed strings with malicious DLL loaded by Soalrmarker Malware during March 2022 campaign"
      reference = "http://security5magics.blogspot.com/2020/12/tracking-jupyter-malware.html" 
  strings:
      $mz = "MZ"
      $off1 = { 59 d1 8c ?? 00 00 }
      $hex2 = { 6c 58 11 07 6c 58 }
      $hex3 = { 6c 5a 58 11 5c }
      $hex4 = { 6c 59 11 ed 6c ?? }
      $hex5 = { 6c 58 fe 0c 2? 01 6c }
      $hex6 = { 6c 58 11 07 11 08 }
      $hex7 = { 6c 5a 58 11 0? 6c }
  condition:
     ($off1 in (0x17d0..0x1a20) and 2 of ($hex*) and $mz at 0)
}

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

9044548d-ed5f-4e64-a9a6-d7cdf8812b2b

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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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