17 lines
840 B
Plaintext
17 lines
840 B
Plaintext
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rule TrojanDownloader_Win32_Discper_A{
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meta:
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description = "TrojanDownloader:Win32/Discper.A,SIGNATURE_TYPE_PEHSTR_EXT,0a 00 0a 00 07 00 00 "
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strings :
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$a_00_0 = {25 00 61 00 70 00 70 00 64 00 61 00 74 00 61 00 25 00 } //1 %appdata%
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$a_00_1 = {25 00 54 00 45 00 4d 00 50 00 25 00 5c 00 } //1 %TEMP%\
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$a_00_2 = {2e 00 65 00 78 00 65 00 } //1 .exe
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$a_00_3 = {6f 00 70 00 65 00 6e 00 } //1 open
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$a_00_4 = {25 00 73 00 25 00 78 00 25 00 78 00 25 00 78 00 25 00 78 00 25 00 73 00 } //1 %s%x%x%x%x%s
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$a_00_5 = {49 00 6e 00 74 00 65 00 72 00 6e 00 65 00 74 00 20 00 45 00 78 00 70 00 6c 00 6f 00 72 00 65 00 72 00 } //1 Internet Explorer
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$a_01_6 = {33 45 d8 83 f7 7b 50 57 8d } //4
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condition:
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((#a_00_0 & 1)*1+(#a_00_1 & 1)*1+(#a_00_2 & 1)*1+(#a_00_3 & 1)*1+(#a_00_4 & 1)*1+(#a_00_5 & 1)*1+(#a_01_6 & 1)*4) >=10
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} |