SEKOIA_Trojan_Win_Bbtok_Lnk_Sep23

rule SEKOIA_Trojan_Win_Bbtok_Lnk_Sep23 : FILE
{
	meta:
		description = "Finds BBTok installation LNK file"
		author = "Sekoia.io"
		id = "b1d5dae6-d92f-4a4a-ae90-528cdb3e9e4c"
		date = "2023-09-26"
		modified = "2024-12-19"
		reference = "https://research.checkpoint.com/2023/behind-the-scenes-of-bbtok-analyzing-a-bankers-server-side-components/"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/trojan_win_bbtok_lnk_sep23.yar#L1-L21"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		hash = "32bf07e3740399105359b62d8a612dfa731b024e06c9104b71b496919b5efe9e"
		logic_hash = "5783487585dde1314c485bdcf3942b7e8b572c0689522ea136240833d2a64f5b"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$lnk = {4C 00 00 00}
		$str01 = "%ProgramFiles(x86)%\\Microsoft\\Edge\\Application\\msedge.exe" ascii wide
		$str02 = ".pdf /Y & start" wide
		$str03 = "\\Microsoft.NET\\Framework\\v4.0.30319\\MSBuild.exe -nologo" wide

	condition:
		all of them and filesize < 10KB
}