64 lines
1.4 KiB
Markdown
64 lines
1.4 KiB
Markdown
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```
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rule ShellJSP {
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strings:
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$s1 = "decrypt(fpath)"
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$s2 = "decrypt(fcontext)"
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$s3 = "decrypt(commandEnc)"
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$s4 = "upload failed!"
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$s5 = "aes.encrypt(allStr)"
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$s6 = "newid"
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condition:
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filesize < 50KB and 4 of them
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}
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```
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```
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rule EncryptJSP {
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strings:
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$s1 = "AEScrypt"
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$s2 = "AES/CBC/PKCS5Padding"
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$s3 = "SecretKeySpec"
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$s4 = "FileOutputStream"
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$s5 = "getParameter"
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$s6 = "new ProcessBuilder"
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$s7 = "new BufferedReader"
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$s8 = "readLine()"
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condition:
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filesize < 50KB and 6 of them
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}
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```
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```
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rule CustomFRPClient {
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meta:
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description=”Identify instances of the actor's custom FRP tool based
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on unique strings chosen by the actor and included in the tool”
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strings:
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$s1 = "%!PS-Adobe-" nocase ascii wide
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$s2 = "github.com/fatedier/frp/cmd/frpc" nocase ascii wide
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$s3 = "github.com/fatedier/frp/cmd/frpc/sub.startService" nocase
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ascii wide
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$s4 = "MAGA2024!!!" nocase ascii wide
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$s5 = "HTTP_PROXYHost: %s" nocase ascii wide
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condition:
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all of them
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}
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```
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```
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rule HACKTOOL_FRPClient {
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meta:
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description=”Identify instances of FRP tool (Note: This tool is
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known to be used by multiple actors, so hits would not necessarily imply
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activity by the specific actor described in this report)”
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strings:
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$s1 = "%!PS-Adobe-" nocase ascii wide
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$s2 = "github.com/fatedier/frp/cmd/frpc" nocase ascii wide
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$s3 = "github.com/fatedier/frp/cmd/frpc/sub.startService" nocase
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ascii wide
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$s4 = "HTTP_PROXYHost: %s" nocase ascii wide
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condition:
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3 of them
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}
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``` |