mirror of
https://github.com/valitydev/signature-base.git
synced 2024-11-07 02:25:19 +00:00
26 lines
1.0 KiB
Plaintext
26 lines
1.0 KiB
Plaintext
rule gen_unicorn_obfuscated_powershell {
|
|
meta:
|
|
description = "PowerShell payload obfuscated by Unicorn toolkit"
|
|
author = "John Lambert @JohnLaTwC"
|
|
date = "2018-04-03"
|
|
hash = "b93d2fe6a671a6a967f31d5b3a0a16d4f93abcaf25188a2bbdc0894087adb10d"
|
|
hash2 = "1afb9795cb489abce39f685a420147a2875303a07c32bf7eec398125300a460b"
|
|
reference = "https://github.com/trustedsec/unicorn/"
|
|
strings:
|
|
$h1 = "powershell"
|
|
$sa1 = ".value.toString() 'JAB"
|
|
$sa2 = ".value.toString() ('JAB"
|
|
$sb1 = "-w 1 -C \"s"
|
|
$sb2 = "/w 1 /C \"s"
|
|
condition:
|
|
filesize < 20KB
|
|
and uint32be(0) == 0x706f7765
|
|
and $h1 at 0
|
|
and (
|
|
uint16be(filesize-2) == 0x2722 or /* Footer 1 */
|
|
( uint16be(filesize-2) == 0x220a and uint8(filesize-3) == 0x27 ) or /* Footer 2 */
|
|
( uint16be(filesize-2) == 0x2922 and uint8(filesize-3) == 0x27 ) /* Footer 3 */
|
|
)
|
|
and ( 1 of ($sa*) and 1 of ($sb*) )
|
|
}
|