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Update Arkei.yar Yara Rule #2458

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merged 2 commits into from
Jan 29, 2025
Merged

Update Arkei.yar Yara Rule #2458

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c6ff6da
Update Arkei rule to match new samples
YungBinary Jan 10, 2025
d22e17d
Update Arkei rule to match new samples
YungBinary Jan 10, 2025
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30 changes: 28 additions & 2 deletions data/yara/CAPE/Arkei.yar
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
rule Arkei
{
meta:
author = "kevoreilly"
author = "kevoreilly, YungBinary"
description = "Arkei Payload"
cape_type = "Arkei Payload"
strings:
Expand All @@ -19,6 +19,32 @@ rule Arkei
$v7 = "files\\cc_" ascii wide
$v8 = "files\\autofill_" ascii wide
$v9 = "files\\cookies_" ascii wide

$loaded_modules = {
64 A1 30 00 00 00
8B 40 0C
8B 40 0C
8B 00
8B 00
8B 40 18
89 45 FC
8B 45 FC
8B E5
5D
C3
}

$language_check = {
FF 15 ?? ?? ?? ??
0F B7 C0
89 45 ??
81 7D ?? 3F 04 ?? ??
7F
}

$ext1 = ".zoo" ascii
$ext2 = ".arc" ascii

condition:
uint16(0) == 0x5A4D and (all of ($string*) or 7 of ($v*))
uint16(0) == 0x5A4D and (($loaded_modules and $language_check and $ext1 and $ext2) or (all of ($string*) or 7 of ($v*)))
}
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