DefenderYara/TrojanDownloader/Win32/Delf/TrojanDownloader_Win32_Delf...

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rule TrojanDownloader_Win32_Delf_BN{
meta:
description = "TrojanDownloader:Win32/Delf.BN,SIGNATURE_TYPE_PEHSTR,32 00 32 00 05 00 00 0a 00 "
strings :
$a_01_0 = {53 6f 66 74 77 61 72 65 5c 42 6f 72 6c 61 6e 64 5c 4c 6f 63 61 6c 65 73 } //0a 00 Software\Borland\Locales
$a_01_1 = {55 52 4c 44 6f 77 6e 6c 6f 61 64 54 6f 46 69 6c 65 41 } //0a 00 URLDownloadToFileA
$a_01_2 = {57 72 69 74 65 50 72 6f 63 65 73 73 4d 65 6d 6f 72 79 } //0a 00 WriteProcessMemory
$a_01_3 = {4d 00 69 00 63 00 72 00 6f 00 73 00 6f 00 66 00 74 00 20 00 43 00 6f 00 72 00 70 00 6f 00 72 00 61 00 74 00 69 00 6f 00 6e 00 } //0a 00 Microsoft Corporation
$a_01_4 = {25 53 79 73 74 65 6d 52 6f 6f 74 25 5c 53 79 73 74 65 6d 33 32 5c 73 76 63 68 6f 73 74 2e 65 78 65 20 2d 6b 20 77 6e 74 74 65 63 68 } //00 00 %SystemRoot%\System32\svchost.exe -k wnttech
condition:
any of ($a_*)
}