Actor(s): Turla Group
There is no description at this point.
rule win_agent_btz_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2020-05-30" version = "1" description = "autogenerated rule brought to you by yara-signator" tool = "yara-signator v0.4.0" tool_config = "callsandjumps;datarefs;binvalue" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.agent_btz" malpedia_rule_date = "20200529" malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8" malpedia_version = "20200529" malpedia_license = "CC BY-SA 4.0" malpedia_sharing = "TLP:WHITE" /* DISCLAIMER * The strings used in this rule have been automatically selected from the * disassembly of memory dumps and unpacked files, using yara-signator. * The code and documentation / approach is published here: * https://github.com/fxb-cocacoding/yara-signator * As Malpedia is used as data source, please note that for a given * number of families, only single samples are documented. * This likely impacts the degree of generalization these rules will offer. * Take the described generation method also into consideration when you * apply the rules in your use cases and assign them confidence levels. */ strings: $sequence_0 = { c74608ffffffff f644240801 7409 56 e8???????? 83c404 } // n = 6, score = 2500 // c74608ffffffff | mov dword ptr [esi + 8], 0xffffffff // f644240801 | test byte ptr [esp + 8], 1 // 7409 | je 0xb // 56 | push esi // e8???????? | // 83c404 | add esp, 4 $sequence_1 = { ffd6 8d54240c 52 ffd7 } // n = 4, score = 2500 // ffd6 | call esi // 8d54240c | lea edx, [esp + 0xc] // 52 | push edx // ffd7 | call edi $sequence_2 = { 50 ffd3 85c0 75d8 5f } // n = 5, score = 2500 // 50 | push eax // ffd3 | call ebx // 85c0 | test eax, eax // 75d8 | jne 0xffffffda // 5f | pop edi $sequence_3 = { c706???????? c7460c00000000 895e08 895e04 c7461000000000 } // n = 5, score = 2400 // c706???????? | // c7460c00000000 | call ebx // 895e08 | test eax, eax // 895e04 | jne 0xffffffde // c7461000000000 | pop edi $sequence_4 = { ff15???????? b800000f00 8b4df4 64890d00000000 5f 5e 5b } // n = 7, score = 2400 // ff15???????? | // b800000f00 | test eax, eax // 8b4df4 | jne 0xffffffdf // 64890d00000000 | pop edi // 5f | mov dword ptr [esi + 8], 0xffffffff // 5e | test byte ptr [esp + 8], 1 // 5b | je 0x17 $sequence_5 = { 56 6a00 68???????? 8935???????? } // n = 4, score = 2300 // 56 | mov dword ptr [esi + 4], ebx // 6a00 | mov dword ptr [esi + 0x10], 0 // 68???????? | // 8935???????? | $sequence_6 = { ff15???????? 894614 33c0 33db } // n = 4, score = 2300 // ff15???????? | // 894614 | mov dword ptr [esi + 0x10], 0 // 33c0 | mov dword ptr [esi + 0x14], ebx // 33db | mov dword ptr [esi + 0xc], 0 $sequence_7 = { 6a00 50 ff15???????? 894614 } // n = 4, score = 2300 // 6a00 | mov ecx, dword ptr [ebp - 0xc] // 50 | mov dword ptr fs:[0], ecx // ff15???????? | // 894614 | pop edi $sequence_8 = { 8d542408 52 c744240c30000000 c744241003000000 } // n = 4, score = 2200 // 8d542408 | push esi // 52 | push 0 // c744240c30000000 | push esi // c744241003000000 | push 0 $sequence_9 = { 8b4608 c706???????? 85c0 7413 83f8ff } // n = 5, score = 2200 // 8b4608 | push esi // c706???????? | // 85c0 | call ebx // 7413 | test eax, eax // 83f8ff | jne 0xffffffde $sequence_10 = { 6a0a 68???????? 6a01 6a00 68???????? } // n = 5, score = 1400 // 6a0a | push 0xa // 68???????? | // 6a01 | push 1 // 6a00 | push 0 // 68???????? | $sequence_11 = { 51 6a00 6819000200 6a00 68???????? } // n = 5, score = 1400 // 51 | push ecx // 6a00 | push 0 // 6819000200 | push 0x20019 // 6a00 | push 0 // 68???????? | $sequence_12 = { 50 68???????? 6a01 68???????? e8???????? 83c410 } // n = 6, score = 1200 // 50 | xor ebx, ebx // 68???????? | // 6a01 | push 0 // 68???????? | // e8???????? | // 83c410 | push eax $sequence_13 = { e8???????? 6810010000 e8???????? 83c404 } // n = 4, score = 1100 // e8???????? | // 6810010000 | push 0x110 // e8???????? | // 83c404 | add esp, 4 $sequence_14 = { 6a01 6a04 6a01 68???????? } // n = 4, score = 1100 // 6a01 | push 1 // 6a04 | push 4 // 6a01 | push 1 // 68???????? | $sequence_15 = { 7511 e8???????? 83c020 50 e8???????? 83c404 } // n = 6, score = 1000 // 7511 | jne 0x13 // e8???????? | // 83c020 | add eax, 0x20 // 50 | push eax // e8???????? | // 83c404 | add esp, 4 $sequence_16 = { 6a01 68???????? e8???????? 83c414 5f 5e 5b } // n = 7, score = 1000 // 6a01 | push 0 // 68???????? | // e8???????? | // 83c414 | push 0x20019 // 5f | push 0 // 5e | push 0 // 5b | push eax $sequence_17 = { 50 e8???????? 83c408 6800010000 e8???????? } // n = 5, score = 1000 // 50 | push 0xa // e8???????? | // 83c408 | push 1 // 6800010000 | push 0 // e8???????? | $sequence_18 = { 51 68???????? 6a01 e8???????? 50 e8???????? } // n = 6, score = 1000 // 51 | push ecx // 68???????? | // 6a01 | push 1 // e8???????? | // 50 | push eax // e8???????? | $sequence_19 = { c684248b00000061 c684248c00000074 c684248d00000065 c684248e00000050 c684248f00000072 } // n = 5, score = 900 // c684248b00000061 | mov byte ptr [esp + 0x8b], 0x61 // c684248c00000074 | mov byte ptr [esp + 0x8c], 0x74 // c684248d00000065 | mov byte ptr [esp + 0x8d], 0x65 // c684248e00000050 | mov byte ptr [esp + 0x8e], 0x50 // c684248f00000072 | mov byte ptr [esp + 0x8f], 0x72 $sequence_20 = { c684249400000073 c684249500000057 c684249600000000 c684241001000047 c684241101000065 c684241201000074 } // n = 6, score = 900 // c684249400000073 | mov byte ptr [esp + 0x94], 0x73 // c684249500000057 | mov byte ptr [esp + 0x95], 0x57 // c684249600000000 | mov byte ptr [esp + 0x96], 0 // c684241001000047 | mov byte ptr [esp + 0x110], 0x47 // c684241101000065 | mov byte ptr [esp + 0x111], 0x65 // c684241201000074 | mov byte ptr [esp + 0x112], 0x74 $sequence_21 = { c684241001000047 c684241101000065 c684241201000074 c68424130100004c c684241401000061 c684241501000073 c684241601000074 } // n = 7, score = 900 // c684241001000047 | mov byte ptr [esp + 0x110], 0x47 // c684241101000065 | mov byte ptr [esp + 0x111], 0x65 // c684241201000074 | mov byte ptr [esp + 0x112], 0x74 // c68424130100004c | mov byte ptr [esp + 0x113], 0x4c // c684241401000061 | mov byte ptr [esp + 0x114], 0x61 // c684241501000073 | mov byte ptr [esp + 0x115], 0x73 // c684241601000074 | mov byte ptr [esp + 0x116], 0x74 $sequence_22 = { c684241601000074 c684241701000045 c684241801000072 c684241901000072 c684241a0100006f c684241b01000072 } // n = 6, score = 900 // c684241601000074 | mov byte ptr [esp + 0x116], 0x74 // c684241701000045 | mov byte ptr [esp + 0x117], 0x45 // c684241801000072 | mov byte ptr [esp + 0x118], 0x72 // c684241901000072 | mov byte ptr [esp + 0x119], 0x72 // c684241a0100006f | mov byte ptr [esp + 0x11a], 0x6f // c684241b01000072 | mov byte ptr [esp + 0x11b], 0x72 $sequence_23 = { c684248f00000072 c68424900000006f c684249100000063 c684249200000065 c684249300000073 c684249400000073 c684249500000057 } // n = 7, score = 900 // c684248f00000072 | mov byte ptr [esp + 0x8f], 0x72 // c68424900000006f | mov byte ptr [esp + 0x90], 0x6f // c684249100000063 | mov byte ptr [esp + 0x91], 0x63 // c684249200000065 | mov byte ptr [esp + 0x92], 0x65 // c684249300000073 | mov byte ptr [esp + 0x93], 0x73 // c684249400000073 | mov byte ptr [esp + 0x94], 0x73 // c684249500000057 | mov byte ptr [esp + 0x95], 0x57 $sequence_24 = { ebd2 c78424a000000068000000 c78424dc00000001000000 33c0 66898424e0000000 } // n = 5, score = 900 // ebd2 | jmp 0xffffffd4 // c78424a000000068000000 | mov dword ptr [esp + 0xa0], 0x68 // c78424dc00000001000000 | mov dword ptr [esp + 0xdc], 1 // 33c0 | xor eax, eax // 66898424e0000000 | mov word ptr [esp + 0xe0], ax $sequence_25 = { c645a20d c645a30a 885da4 c685fcfeffff2d } // n = 4, score = 800 // c645a20d | mov byte ptr [ebp - 0x5e], 0xd // c645a30a | mov byte ptr [ebp - 0x5d], 0xa // 885da4 | mov byte ptr [ebp - 0x5c], bl // c685fcfeffff2d | mov byte ptr [ebp - 0x104], 0x2d $sequence_26 = { 6a27 6a02 6a00 6a01 } // n = 4, score = 800 // 6a27 | push 0x27 // 6a02 | push 2 // 6a00 | push 0 // 6a01 | push 1 $sequence_27 = { 8b5d0c 56 8bf0 8b4624 57 83c304 53 } // n = 7, score = 800 // 8b5d0c | mov ebx, dword ptr [ebp + 0xc] // 56 | push esi // 8bf0 | mov esi, eax // 8b4624 | mov eax, dword ptr [esi + 0x24] // 57 | push edi // 83c304 | add ebx, 4 // 53 | push ebx $sequence_28 = { c645d316 c645d43a c645d53b c645d63b } // n = 4, score = 700 // c645d316 | mov byte ptr [ebp - 0x2d], 0x16 // c645d43a | mov byte ptr [ebp - 0x2c], 0x3a // c645d53b | mov byte ptr [ebp - 0x2b], 0x3b // c645d63b | mov byte ptr [ebp - 0x2a], 0x3b $sequence_29 = { c644244d31 c644244e10 c644244f2d c644245055 } // n = 4, score = 300 // c644244d31 | mov byte ptr [esp + 0x4d], 0x31 // c644244e10 | mov byte ptr [esp + 0x4e], 0x10 // c644244f2d | mov byte ptr [esp + 0x4f], 0x2d // c644245055 | mov byte ptr [esp + 0x50], 0x55 $sequence_30 = { 4883ec30 33c0 488bf2 488bf9 } // n = 4, score = 300 // 4883ec30 | mov byte ptr [esp + 0xbb], 0x26 // 33c0 | dec eax // 488bf2 | sub esp, 0x30 // 488bf9 | xor eax, eax $sequence_31 = { c68424b600000005 c68424b700000027 c68424b80000003a c68424b900000036 c68424ba00000030 } // n = 5, score = 300 // c68424b600000005 | mov byte ptr [esp + 0xb6], 5 // c68424b700000027 | mov byte ptr [esp + 0xb7], 0x27 // c68424b80000003a | mov byte ptr [esp + 0xb8], 0x3a // c68424b900000036 | mov byte ptr [esp + 0xb9], 0x36 // c68424ba00000030 | mov byte ptr [esp + 0xba], 0x30 $sequence_32 = { 488b0e 48894628 488b4638 4c8d4c2450 448bc3 } // n = 5, score = 300 // 488b0e | mov ebp, dword ptr [esp + 0x60] // 48894628 | dec eax // 488b4638 | mov esi, dword ptr [esp + 0x68] // 4c8d4c2450 | mov byte ptr [esp + 0xb8], 0x3a // 448bc3 | mov byte ptr [esp + 0xb9], 0x36 $sequence_33 = { 4883ec28 e8???????? 85c0 7508 } // n = 4, score = 300 // 4883ec28 | dec eax // e8???????? | // 85c0 | sub esp, 0x28 // 7508 | test eax, eax $sequence_34 = { eb06 488b07 896830 33c0 488b5c2458 488b6c2460 488b742468 } // n = 7, score = 300 // eb06 | dec eax // 488b07 | mov esi, edx // 896830 | dec eax // 33c0 | mov edi, ecx // 488b5c2458 | jmp 8 // 488b6c2460 | dec eax // 488b742468 | mov eax, dword ptr [edi] $sequence_35 = { 894c2408 4883ec38 c74424203a040000 448b442440 33d2 b93a040000 } // n = 6, score = 300 // 894c2408 | dec eax // 4883ec38 | mov eax, dword ptr [esi + 0x38] // c74424203a040000 | dec esp // 448b442440 | lea ecx, [esp + 0x50] // 33d2 | inc esp // b93a040000 | mov eax, ebx $sequence_36 = { 488b4338 33d2 488bce 448d4220 } // n = 4, score = 300 // 488b4338 | dec eax // 33d2 | mov ecx, dword ptr [edi] // 488bce | mov dword ptr [ecx + 0x30], eax // 448d4220 | jmp 8 $sequence_37 = { 8d8594faffff 50 68???????? ff15???????? } // n = 4, score = 200 // 8d8594faffff | mov ecx, dword ptr [ebp - 0xc] // 50 | mov dword ptr fs:[0], ecx // 68???????? | // ff15???????? | $sequence_38 = { 50 e8???????? 59 59 68e9fd0000 ff15???????? 33c9 } // n = 7, score = 100 // 50 | test byte ptr [esp + 8], 1 // e8???????? | // 59 | je 0x17 // 59 | push esi // 68e9fd0000 | add esp, 4 // ff15???????? | // 33c9 | test eax, eax $sequence_39 = { c1f805 83e11f c1e106 8b0485100b4200 80640804fe ff36 e8???????? } // n = 7, score = 100 // c1f805 | mov dword ptr [esi + 0x14], eax // 83e11f | xor eax, eax // c1e106 | xor ebx, ebx // 8b0485100b4200 | push 0 // 80640804fe | push eax // ff36 | mov dword ptr [esi + 0x14], eax // e8???????? | $sequence_40 = { 53 51 51 53 8bce e8???????? 83c414 } // n = 7, score = 100 // 53 | xor eax, eax // 51 | xor ebx, ebx // 51 | push 0 // 53 | push eax // 8bce | mov dword ptr [esi + 0x14], eax // e8???????? | // 83c414 | push eax $sequence_41 = { a5 5f 5e 5d 5b 81c4f8000000 c3 } // n = 7, score = 100 // a5 | xor eax, eax // 5f | push eax // 5e | mov dword ptr [esi + 8], 0xffffffff // 5d | test byte ptr [esp + 8], 1 // 5b | je 0x20 // 81c4f8000000 | push esi // c3 | mov dword ptr [esi + 8], 0xffffffff $sequence_42 = { 03452c 85c9 0f8444010000 8d4804 894c2410 85f6 } // n = 6, score = 100 // 03452c | pop edi // 85c9 | push esi // 0f8444010000 | push 0 // 8d4804 | push esi // 894c2410 | push 0 // 85f6 | mov dword ptr [esi + 0x14], eax $sequence_43 = { 7309 8b04c5189d4100 5d c3 33c0 } // n = 5, score = 100 // 7309 | mov dword ptr [esi + 0x14], eax // 8b04c5189d4100 | xor eax, eax // 5d | xor ebx, ebx // c3 | push 0 // 33c0 | push eax $sequence_44 = { 83e61f c1e606 033485100b4200 8975dc 8b02 8906 } // n = 6, score = 100 // 83e61f | je 0x17 // c1e606 | cmp eax, -1 // 033485100b4200 | je 0x17 // 8975dc | push eax // 8b02 | lea eax, [ebp - 0x56c] // 8906 | push eax condition: 7 of them and filesize < 3522560 }
rule win_agent_btz_w0 { meta: source = "https://www.symantec.com/content/en/us/enterprise/media/security_response/whitepapers/waterbug-attack-group.pdf" contribution = "pnx - removed FPs" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.agent_btz" malpedia_version = "20171113" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $b = {C645????} $c = {C685??FEFFFF??} $d = {FFA0??0?0000} $e = {89A8??00000068??00000056FFD78B} $f = {00004889????030000488B} $tmp_fn = "FA.tmp" condition: ((#c > 200 and #b > 200 ) or (#d > 40) and (#e > 15 or #f > 30)) and $tmp_fn }
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