27 lines
2.7 KiB
Plaintext
27 lines
2.7 KiB
Plaintext
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rule Backdoor_Win32_PcClient_BV{
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meta:
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description = "Backdoor:Win32/PcClient.BV,SIGNATURE_TYPE_PEHSTR_EXT,11 00 11 00 11 00 00 "
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strings :
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$a_00_0 = {53 59 53 54 45 4d 5c 43 6f 6e 74 72 6f 6c 53 65 74 30 30 31 5c 53 65 72 76 69 63 65 73 5c 25 73 } //1 SYSTEM\ControlSet001\Services\%s
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$a_00_1 = {53 4f 46 54 57 41 52 45 5c 43 6c 61 73 73 65 73 5c 48 54 54 50 5c 73 68 65 6c 6c 5c 6f 70 65 6e 5c 63 6f 6d 6d 61 6e 64 } //1 SOFTWARE\Classes\HTTP\shell\open\command
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$a_00_2 = {5c 5c 2e 5c 70 69 70 65 5c } //1 \\.\pipe\
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$a_00_3 = {57 69 6e 53 74 61 30 } //1 WinSta0
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$a_00_4 = {5c 73 76 63 68 6f 73 74 2e 65 78 65 20 2d 6b } //1 \svchost.exe -k
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$a_00_5 = {53 65 72 76 69 63 65 44 6c 6c } //1 ServiceDll
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$a_00_6 = {53 4f 46 54 57 41 52 45 5c 4d 69 63 72 6f 73 6f 66 74 5c 57 69 6e 64 6f 77 73 20 4e 54 5c 43 75 72 72 65 6e 74 56 65 72 73 69 6f 6e 5c 53 76 63 48 6f 73 74 } //1 SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost
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$a_00_7 = {5b 25 30 34 64 2d 25 30 32 64 2d 25 30 32 64 20 25 30 32 64 3a 25 30 32 64 3a 25 30 32 64 5d } //1 [%04d-%02d-%02d %02d:%02d:%02d]
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$a_00_8 = {25 64 2e 65 78 65 } //1 %d.exe
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$a_00_9 = {25 64 2e 74 6d 70 } //1 %d.tmp
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$a_00_10 = {75 70 64 61 74 65 65 76 65 6e 74 3d 25 73 3b } //1 updateevent=%s;
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$a_00_11 = {4d 6f 7a 69 6c 6c 61 2f 34 2e 30 20 28 63 6f 6d 70 61 74 69 62 6c 65 3b 20 4d 53 49 45 20 36 2e 30 3b 20 57 69 6e 64 6f 77 73 20 4e 54 20 35 2e 32 3b 20 53 56 31 3b 20 2e 4e 45 54 20 43 4c 52 20 31 2e 31 2e 34 33 32 32 29 } //1 Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322)
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$a_00_12 = {50 63 4d 61 69 6e 2e 64 6c 6c } //1 PcMain.dll
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$a_00_13 = {44 6f 4d 61 69 6e 57 6f 72 6b } //1 DoMainWork
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$a_00_14 = {44 6f 53 65 72 76 69 63 65 } //1 DoService
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$a_00_15 = {53 65 72 76 69 63 65 4d 61 69 6e } //1 ServiceMain
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$a_02_16 = {68 3f 00 0f 00 6a 00 6a 00 ff 15 ?? ?? ?? ?? 89 85 fc fd ff ff 83 bd fc fd ff ff 00 75 08 83 c8 ff e9 ?? ?? ?? ?? c6 85 00 fe ff ff 00 b9 7f 00 00 00 33 c0 8d bd 01 fe ff ff f3 ab 66 ab aa 68 c8 00 00 00 8d 85 00 fe ff ff 50 90 90 00 ff 15 ?? ?? ?? ?? 68 ?? ?? ?? ?? 8d 8d 00 fe ff ff 51 ff 15 ?? ?? ?? ?? 8b 55 08 52 8d 85 00 fe ff ff 50 ff 15 ?? ?? ?? ?? 6a 00 6a 00 6a 00 6a 00 6a 00 8d 8d 00 fe ff ff 51 6a 01 6a 02 68 10 01 00 00 68 ff 01 0f 00 8b 55 0c 52 8b 45 08 50 8b ?? ?? ?? ?? 51 ff 15 ?? ?? ?? ?? 89 85 f8 fd ff ff 83 bd f8 fd ff ff 00 74 0d 8b 95 f8 fd ff ff 52 ff 15 } //1
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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_00_6 & 1)*1+(#a_00_7 & 1)*1+(#a_00_8 & 1)*1+(#a_00_9 & 1)*1+(#a_00_10 & 1)*1+(#a_00_11 & 1)*1+(#a_00_12 & 1)*1+(#a_00_13 & 1)*1+(#a_00_14 & 1)*1+(#a_00_15 & 1)*1+(#a_02_16 & 1)*1) >=17
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} |