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 = "2020-10-14" version = "1" description = "autogenerated rule brought to you by yara-signator" tool = "yara-signator v0.5.0" tool_config = "callsandjumps;datarefs;binvalue" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.agent_btz" malpedia_rule_date = "20201014" malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9" malpedia_version = "20201014" 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 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 = { 50 ffd3 85c0 75d8 } // n = 4, score = 2500 // 50 | push eax // ffd3 | call ebx // 85c0 | test eax, eax // 75d8 | jne 0xffffffda $sequence_1 = { c74608ffffffff f644240801 7409 56 e8???????? 83c404 8bc6 } // n = 7, 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 // 8bc6 | mov eax, esi $sequence_2 = { 51 ffd6 8d54240c 52 ffd7 } // n = 5, score = 2500 // 51 | push ecx // ffd6 | call esi // 8d54240c | lea edx, [esp + 0xc] // 52 | push edx // ffd7 | call edi $sequence_3 = { 895e08 895e04 c7461000000000 895e14 } // n = 4, score = 2400 // 895e08 | mov ecx, dword ptr [ebp - 0xc] // 895e04 | mov dword ptr fs:[0], ecx // c7461000000000 | pop edi // 895e14 | pop esi $sequence_4 = { ff15???????? b804000f00 8b4df4 64890d00000000 5f 5e 5b } // n = 7, score = 2400 // ff15???????? | // b804000f00 | pop edi // 8b4df4 | pop esi // 64890d00000000 | push eax // 5f | call ebx // 5e | test eax, eax // 5b | jne 0xffffffde $sequence_5 = { c706???????? c7460c00000000 895e08 895e04 } // n = 4, score = 2400 // c706???????? | // c7460c00000000 | mov dword ptr fs:[0], ecx // 895e08 | pop edi // 895e04 | mov eax, 0xf0000 $sequence_6 = { 50 ff15???????? 894614 33c0 33db } // n = 5, score = 2300 // 50 | mov eax, 0xf0005 // ff15???????? | // 894614 | mov ecx, dword ptr [ebp - 0xc] // 33c0 | mov dword ptr fs:[0], ecx // 33db | pop edi $sequence_7 = { 56 6a00 68???????? 8935???????? } // n = 4, score = 2300 // 56 | mov ecx, dword ptr [ebp - 0xc] // 6a00 | mov dword ptr fs:[0], ecx // 68???????? | // 8935???????? | $sequence_8 = { 8bf1 8b4608 c706???????? 85c0 7413 83f8ff 740e } // n = 7, score = 2200 // 8bf1 | pop esi // 8b4608 | lea ecx, [esp + 0xc] // c706???????? | // 85c0 | push ecx // 7413 | call esi // 83f8ff | lea edx, [esp + 0xc] // 740e | push edx $sequence_9 = { 740e 50 ff15???????? c74608ffffffff f644240801 7409 } // n = 6, score = 2200 // 740e | push eax // 50 | mov dword ptr [esi + 8], 0xffffffff // ff15???????? | // c74608ffffffff | test byte ptr [esp + 8], 1 // f644240801 | je 0x10 // 7409 | mov dword ptr [esi + 8], 0xffffffff $sequence_10 = { 51 6a00 6819000200 6a00 68???????? } // n = 5, score = 1400 // 51 | push ecx // 6a00 | push 0 // 6819000200 | push 0x20019 // 6a00 | push 0 // 68???????? | $sequence_11 = { 50 68???????? 6a01 68???????? e8???????? 83c410 } // n = 6, score = 1200 // 50 | je 0xb // 68???????? | // 6a01 | push esi // 68???????? | // e8???????? | // 83c410 | mov esi, ecx $sequence_12 = { 6a01 6a04 6a01 68???????? } // n = 4, score = 1100 // 6a01 | push 1 // 6a04 | push 4 // 6a01 | push 1 // 68???????? | $sequence_13 = { 50 e8???????? 83c408 6800010000 e8???????? } // n = 5, score = 1000 // 50 | push 1 // e8???????? | // 83c408 | push 0 // 6800010000 | push 0x20019 // e8???????? | $sequence_14 = { 51 68???????? 6a01 e8???????? 50 e8???????? 83c410 } // n = 7, score = 1000 // 51 | push ecx // 68???????? | // 6a01 | push 1 // e8???????? | // 50 | push eax // e8???????? | // 83c410 | add esp, 0x10 $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 0x20019 // 68???????? | // e8???????? | // 83c414 | push 0 // 5f | push 0 // 5e | push eax // 5b | add esp, 8 $sequence_17 = { c684248800000043 c684248900000072 c684248a00000065 c684248b00000061 c684248c00000074 c684248d00000065 c684248e00000050 } // n = 7, score = 900 // c684248800000043 | mov byte ptr [esp + 0x88], 0x43 // c684248900000072 | mov byte ptr [esp + 0x89], 0x72 // c684248a00000065 | mov byte ptr [esp + 0x8a], 0x65 // 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 $sequence_18 = { c684241101000065 c684241201000074 c68424130100004c c684241401000061 c684241501000073 } // n = 5, score = 900 // 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 $sequence_19 = { c684241501000073 c684241601000074 c684241701000045 c684241801000072 c684241901000072 c684241a0100006f c684241b01000072 } // n = 7, score = 900 // c684241501000073 | mov byte ptr [esp + 0x115], 0x73 // 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_20 = { c68424900000006f c684249100000063 c684249200000065 c684249300000073 c684249400000073 } // n = 5, score = 900 // 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 $sequence_21 = { 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_22 = { c684249300000073 c684249400000073 c684249500000057 c684249600000000 c684241001000047 c684241101000065 } // n = 6, score = 900 // c684249300000073 | mov byte ptr [esp + 0x93], 0x73 // 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 $sequence_23 = { c684248d00000065 c684248e00000050 c684248f00000072 c68424900000006f c684249100000063 } // n = 5, score = 900 // c684248d00000065 | mov byte ptr [esp + 0x8d], 0x65 // c684248e00000050 | mov byte ptr [esp + 0x8e], 0x50 // c684248f00000072 | mov byte ptr [esp + 0x8f], 0x72 // c68424900000006f | mov byte ptr [esp + 0x90], 0x6f // c684249100000063 | mov byte ptr [esp + 0x91], 0x63 $sequence_24 = { 668945f2 58 6a38 668945f4 58 } // n = 5, score = 800 // 668945f2 | mov word ptr [ebp - 0xe], ax // 58 | pop eax // 6a38 | push 0x38 // 668945f4 | mov word ptr [ebp - 0xc], ax // 58 | pop eax $sequence_25 = { 6a27 6a02 6a00 6a01 } // n = 4, score = 800 // 6a27 | push 0x27 // 6a02 | push 2 // 6a00 | push 0 // 6a01 | push 1 $sequence_26 = { e8???????? e8???????? 8bc8 e8???????? c745fcffffffff } // n = 5, score = 700 // e8???????? | // e8???????? | // 8bc8 | mov ecx, eax // e8???????? | // c745fcffffffff | mov dword ptr [ebp - 4], 0xffffffff $sequence_27 = { c645d43a c645d53b c645d63b c645d730 } // n = 4, score = 700 // c645d43a | mov byte ptr [ebp - 0x2c], 0x3a // c645d53b | mov byte ptr [ebp - 0x2b], 0x3b // c645d63b | mov byte ptr [ebp - 0x2a], 0x3b // c645d730 | mov byte ptr [ebp - 0x29], 0x30 $sequence_28 = { c645cb30 c645cc27 c645cd3b c645ce30 } // n = 4, score = 700 // c645cb30 | mov byte ptr [ebp - 0x35], 0x30 // c645cc27 | mov byte ptr [ebp - 0x34], 0x27 // c645cd3b | mov byte ptr [ebp - 0x33], 0x3b // c645ce30 | mov byte ptr [ebp - 0x32], 0x30 $sequence_29 = { 8d8505feffff 50 e8???????? 83c40c } // n = 4, score = 700 // 8d8505feffff | push 0 // 50 | push 0x27 // e8???????? | // 83c40c | push 2 $sequence_30 = { 6a10 68???????? 6a01 6a00 6a00 } // n = 5, score = 500 // 6a10 | add esp, 0x14 // 68???????? | // 6a01 | pop edi // 6a00 | push eax // 6a00 | push 1 $sequence_31 = { 488b4608 488b0e 48894628 488b4638 } // n = 4, score = 300 // 488b4608 | mov ecx, ebx // 488b0e | mov dword ptr [esp + 0x28], ebp // 48894628 | dec eax // 488b4638 | mov eax, dword ptr [esi + 8] $sequence_32 = { c68424b000000016 c68424b100000027 c68424b200000030 c68424b300000034 c68424b400000021 } // n = 5, score = 300 // c68424b000000016 | mov byte ptr [esp + 0xb0], 0x16 // c68424b100000027 | mov byte ptr [esp + 0xb1], 0x27 // c68424b200000030 | mov byte ptr [esp + 0xb2], 0x30 // c68424b300000034 | mov byte ptr [esp + 0xb3], 0x34 // c68424b400000021 | mov byte ptr [esp + 0xb4], 0x21 $sequence_33 = { 4533c0 ba000000c0 488bcb 896c2428 } // n = 4, score = 300 // 4533c0 | inc ebp // ba000000c0 | xor eax, eax // 488bcb | mov edx, 0xc0000000 // 896c2428 | dec eax $sequence_34 = { c68424b600000005 c68424b700000027 c68424b80000003a c68424b900000036 c68424ba00000030 c68424bb00000026 c68424bc00000026 } // n = 7, score = 300 // c68424b600000005 | dec eax // c68424b700000027 | mov ecx, dword ptr [esi] // c68424b80000003a | dec eax // c68424b900000036 | mov dword ptr [esi + 0x28], eax // c68424ba00000030 | dec eax // c68424bb00000026 | mov eax, dword ptr [esi + 0x38] // c68424bc00000026 | mov byte ptr [esp + 0xb6], 5 $sequence_35 = { 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_36 = { 33ed 488bf9 498bf0 8d4d40 488bda } // n = 5, score = 300 // 33ed | mov byte ptr [esp + 0xbb], 0x26 // 488bf9 | mov byte ptr [esp + 0xbc], 0x26 // 498bf0 | mov byte ptr [esp + 0xbd], 2 // 8d4d40 | mov dword ptr [esp + 0x60], 0x11c // 488bda | dec eax $sequence_37 = { 33d2 488b4c2460 ff15???????? 8bd8 } // n = 4, score = 300 // 33d2 | lea ecx, [esp + 0x60] // 488b4c2460 | cmp dword ptr [esp + 0x64], 6 // ff15???????? | // 8bd8 | xor ebp, ebp $sequence_38 = { e8???????? c74424601c010000 488d4c2460 ff15???????? 837c246406 } // n = 5, score = 300 // e8???????? | // c74424601c010000 | mov byte ptr [esp + 0xbb], 0x26 // 488d4c2460 | mov byte ptr [esp + 0xb9], 0x36 // ff15???????? | // 837c246406 | mov byte ptr [esp + 0xba], 0x30 $sequence_39 = { 8d8594faffff 50 68???????? ff15???????? } // n = 4, score = 200 // 8d8594faffff | push 0 // 50 | push eax // 68???????? | // ff15???????? | $sequence_40 = { 8b07 2bc3 0f84e5000000 48 } // n = 4, score = 100 // 8b07 | mov dword ptr [esi + 0x14], eax // 2bc3 | xor eax, eax // 0f84e5000000 | xor ebx, ebx // 48 | je 0x10 $sequence_41 = { 8b0485100b4200 83c00c 03c7 50 ff15???????? 33c0 } // n = 6, score = 100 // 8b0485100b4200 | mov dword ptr [esi + 0x14], eax // 83c00c | mov dword ptr [esi + 0x14], eax // 03c7 | xor eax, eax // 50 | xor ebx, ebx // ff15???????? | // 33c0 | push eax $sequence_42 = { e8???????? 59 59 68???????? e8???????? 59 8b0c9d10c04100 } // n = 7, score = 100 // e8???????? | // 59 | add ecx, dword ptr [eax*4 + 0x420b10] // 59 | jmp 0x16 // 68???????? | // e8???????? | // 59 | pop eax // 8b0c9d10c04100 | imul eax, eax, 0 $sequence_43 = { 7414 8bc1 83e11f c1f805 c1e106 030c85100b4200 eb02 } // n = 7, score = 100 // 7414 | push eax // 8bc1 | mov dword ptr [esi + 8], 0xffffffff // 83e11f | test byte ptr [esp + 8], 1 // c1f805 | je 0x18 // c1e106 | lea eax, [ebp - 0x56c] // 030c85100b4200 | push eax // eb02 | mov eax, dword ptr [eax*4 + 0x420b10] $sequence_44 = { 8b442448 8908 85c9 0f84cd000000 ff7500 8d474c 46 } // n = 7, score = 100 // 8b442448 | mov dword ptr [eax + 0x420f04], 2 // 8908 | push 4 // 85c9 | pop eax // 0f84cd000000 | imul eax, eax, 0 // ff7500 | mov ebx, eax // 8d474c | test ebx, ebx // 46 | je 0x235 $sequence_45 = { 8bd8 85db 0f842d020000 33c9 894c2414 394c242c 0f8616020000 } // n = 7, score = 100 // 8bd8 | je 0xed // 85db | dec eax // 0f842d020000 | je 0x16 // 33c9 | mov eax, ecx // 894c2414 | and ecx, 0x1f // 394c242c | sar eax, 5 // 0f8616020000 | shl ecx, 6 $sequence_46 = { 58 6bc000 c780040f420002000000 6a04 58 6bc000 8b0d???????? } // n = 7, score = 100 // 58 | add eax, 0xc // 6bc000 | add eax, edi // c780040f420002000000 | push eax // 6a04 | xor eax, eax // 58 | mov eax, dword ptr [edi] // 6bc000 | sub eax, ebx // 8b0d???????? | 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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