rule win_flawedammyy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.flawedammyy."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.flawedammyy"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 3b45f4 0f8f43010000 8d642400 8d148500000000 8955e8 8b9415e8feffff 8955f0 }
            // n = 7, score = 200
            //   3b45f4               | cmp                 eax, dword ptr [ebp - 0xc]
            //   0f8f43010000         | jg                  0x149
            //   8d642400             | lea                 esp, [esp]
            //   8d148500000000       | lea                 edx, [eax*4]
            //   8955e8               | mov                 dword ptr [ebp - 0x18], edx
            //   8b9415e8feffff       | mov                 edx, dword ptr [ebp + edx - 0x118]
            //   8955f0               | mov                 dword ptr [ebp - 0x10], edx

        $sequence_1 = { 8975f4 8945f0 85db 7e3e 8d642400 0fb70450 8bc8 }
            // n = 7, score = 200
            //   8975f4               | mov                 dword ptr [ebp - 0xc], esi
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   85db                 | test                ebx, ebx
            //   7e3e                 | jle                 0x40
            //   8d642400             | lea                 esp, [esp]
            //   0fb70450             | movzx               eax, word ptr [eax + edx*2]
            //   8bc8                 | mov                 ecx, eax

        $sequence_2 = { 3a86ca000000 7504 b001 eb02 }
            // n = 4, score = 200
            //   3a86ca000000         | cmp                 al, byte ptr [esi + 0xca]
            //   7504                 | jne                 6
            //   b001                 | mov                 al, 1
            //   eb02                 | jmp                 4

        $sequence_3 = { 52 50 ff5124 85c0 0f8872ffffff 8b45cc 8d55d4 }
            // n = 7, score = 200
            //   52                   | push                edx
            //   50                   | push                eax
            //   ff5124               | call                dword ptr [ecx + 0x24]
            //   85c0                 | test                eax, eax
            //   0f8872ffffff         | js                  0xffffff78
            //   8b45cc               | mov                 eax, dword ptr [ebp - 0x34]
            //   8d55d4               | lea                 edx, [ebp - 0x2c]

        $sequence_4 = { 3a9debfeffff 741a 0c04 8807 }
            // n = 4, score = 200
            //   3a9debfeffff         | cmp                 bl, byte ptr [ebp - 0x115]
            //   741a                 | je                  0x1c
            //   0c04                 | or                  al, 4
            //   8807                 | mov                 byte ptr [edi], al

        $sequence_5 = { 83ec10 8bc4 6a00 660fd600 f30f7e45a4 660fd64008 }
            // n = 6, score = 200
            //   83ec10               | sub                 esp, 0x10
            //   8bc4                 | mov                 eax, esp
            //   6a00                 | push                0
            //   660fd600             | movq                qword ptr [eax], xmm0
            //   f30f7e45a4           | movq                xmm0, qword ptr [ebp - 0x5c]
            //   660fd64008           | movq                qword ptr [eax + 8], xmm0

        $sequence_6 = { 51 68???????? 8d85acf9ffff 50 8d85a4f7ffff 68???????? 50 }
            // n = 7, score = 200
            //   51                   | push                ecx
            //   68????????           |                     
            //   8d85acf9ffff         | lea                 eax, [ebp - 0x654]
            //   50                   | push                eax
            //   8d85a4f7ffff         | lea                 eax, [ebp - 0x85c]
            //   68????????           |                     
            //   50                   | push                eax

        $sequence_7 = { 3a86c1000000 755e 668b865a050000 663b86c2000000 754e }
            // n = 5, score = 200
            //   3a86c1000000         | cmp                 al, byte ptr [esi + 0xc1]
            //   755e                 | jne                 0x60
            //   668b865a050000       | mov                 ax, word ptr [esi + 0x55a]
            //   663b86c2000000       | cmp                 ax, word ptr [esi + 0xc2]
            //   754e                 | jne                 0x50

        $sequence_8 = { 83feff 0f8425020000 68f1cbf7ae 6a01 e8???????? 83c408 6a00 }
            // n = 7, score = 200
            //   83feff               | cmp                 esi, -1
            //   0f8425020000         | je                  0x22b
            //   68f1cbf7ae           | push                0xaef7cbf1
            //   6a01                 | push                1
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   6a00                 | push                0

        $sequence_9 = { 68???????? e8???????? 8b7508 c7465c28394100 83660800 }
            // n = 5, score = 200
            //   68????????           |                     
            //   e8????????           |                     
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   c7465c28394100       | mov                 dword ptr [esi + 0x5c], 0x413928
            //   83660800             | and                 dword ptr [esi + 8], 0

        $sequence_10 = { 3a86c8000000 7520 8a8661050000 3a86c9000000 }
            // n = 4, score = 200
            //   3a86c8000000         | cmp                 al, byte ptr [esi + 0xc8]
            //   7520                 | jne                 0x22
            //   8a8661050000         | mov                 al, byte ptr [esi + 0x561]
            //   3a86c9000000         | cmp                 al, byte ptr [esi + 0xc9]

        $sequence_11 = { 50 8d85f0fbffff 68???????? 50 ffd7 8b35???????? 83c424 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8d85f0fbffff         | lea                 eax, [ebp - 0x410]
            //   68????????           |                     
            //   50                   | push                eax
            //   ffd7                 | call                edi
            //   8b35????????         |                     
            //   83c424               | add                 esp, 0x24

        $sequence_12 = { 85c0 0f8549010000 817df4a00f0000 0f8677030000 50 6a23 }
            // n = 6, score = 200
            //   85c0                 | test                eax, eax
            //   0f8549010000         | jne                 0x14f
            //   817df4a00f0000       | cmp                 dword ptr [ebp - 0xc], 0xfa0
            //   0f8677030000         | jbe                 0x37d
            //   50                   | push                eax
            //   6a23                 | push                0x23

        $sequence_13 = { 3a86c9000000 7512 8a8662050000 3a86ca000000 }
            // n = 4, score = 200
            //   3a86c9000000         | cmp                 al, byte ptr [esi + 0xc9]
            //   7512                 | jne                 0x14
            //   8a8662050000         | mov                 al, byte ptr [esi + 0x562]
            //   3a86ca000000         | cmp                 al, byte ptr [esi + 0xca]

        $sequence_14 = { 3a95eafcffff 0f94c0 84c0 751d }
            // n = 4, score = 200
            //   3a95eafcffff         | cmp                 dl, byte ptr [ebp - 0x316]
            //   0f94c0               | sete                al
            //   84c0                 | test                al, al
            //   751d                 | jne                 0x1f

        $sequence_15 = { 0000 0404 0404 0404 0401 0404 }
            // n = 6, score = 200
            //   0000                 | add                 byte ptr [eax], al
            //   0404                 | add                 al, 4
            //   0404                 | add                 al, 4
            //   0404                 | add                 al, 4
            //   0401                 | add                 al, 1
            //   0404                 | add                 al, 4

        $sequence_16 = { ab ab 33c0 8d7d95 ab ab ab }
            // n = 7, score = 100
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   33c0                 | xor                 eax, eax
            //   8d7d95               | lea                 edi, [ebp - 0x6b]
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax

        $sequence_17 = { 7509 395df0 0f8415020000 8d45f0 53 50 53 }
            // n = 7, score = 100
            //   7509                 | jne                 0xb
            //   395df0               | cmp                 dword ptr [ebp - 0x10], ebx
            //   0f8415020000         | je                  0x21b
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   53                   | push                ebx

        $sequence_18 = { 0f8781000000 ff248dfd243400 881f eb76 ff30 eb63 57 }
            // n = 7, score = 100
            //   0f8781000000         | ja                  0x87
            //   ff248dfd243400       | jmp                 dword ptr [ecx*4 + 0x3424fd]
            //   881f                 | mov                 byte ptr [edi], bl
            //   eb76                 | jmp                 0x78
            //   ff30                 | push                dword ptr [eax]
            //   eb63                 | jmp                 0x65
            //   57                   | push                edi

        $sequence_19 = { 8b7df4 8b0c855c303400 c1e705 33d2 03fe 42 837dfcff }
            // n = 7, score = 100
            //   8b7df4               | mov                 edi, dword ptr [ebp - 0xc]
            //   8b0c855c303400       | mov                 ecx, dword ptr [eax*4 + 0x34305c]
            //   c1e705               | shl                 edi, 5
            //   33d2                 | xor                 edx, edx
            //   03fe                 | add                 edi, esi
            //   42                   | inc                 edx
            //   837dfcff             | cmp                 dword ptr [ebp - 4], -1

        $sequence_20 = { 83f855 0f872affffff 0fb6805a213400 ff2485f6203400 8b8614080000 3b45f4 7e03 }
            // n = 7, score = 100
            //   83f855               | cmp                 eax, 0x55
            //   0f872affffff         | ja                  0xffffff30
            //   0fb6805a213400       | movzx               eax, byte ptr [eax + 0x34215a]
            //   ff2485f6203400       | jmp                 dword ptr [eax*4 + 0x3420f6]
            //   8b8614080000         | mov                 eax, dword ptr [esi + 0x814]
            //   3b45f4               | cmp                 eax, dword ptr [ebp - 0xc]
            //   7e03                 | jle                 5

        $sequence_21 = { 8b55fc 8d0c8a 894dfc eb0e 8b14957c303400 49 }
            // n = 6, score = 100
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   8d0c8a               | lea                 ecx, [edx + ecx*4]
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   eb0e                 | jmp                 0x10
            //   8b14957c303400       | mov                 edx, dword ptr [edx*4 + 0x34307c]
            //   49                   | dec                 ecx

        $sequence_22 = { 0f8448010000 50 ff15???????? 8945fc 57 ff75fc }
            // n = 6, score = 100
            //   0f8448010000         | je                  0x14e
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   57                   | push                edi
            //   ff75fc               | push                dword ptr [ebp - 4]

        $sequence_23 = { 395d08 895de0 895dcc c745f001000000 895dd4 c745e402010000 895df8 }
            // n = 7, score = 100
            //   395d08               | cmp                 dword ptr [ebp + 8], ebx
            //   895de0               | mov                 dword ptr [ebp - 0x20], ebx
            //   895dcc               | mov                 dword ptr [ebp - 0x34], ebx
            //   c745f001000000       | mov                 dword ptr [ebp - 0x10], 1
            //   895dd4               | mov                 dword ptr [ebp - 0x2c], ebx
            //   c745e402010000       | mov                 dword ptr [ebp - 0x1c], 0x102
            //   895df8               | mov                 dword ptr [ebp - 8], ebx

        $sequence_24 = { 8b7d08 7510 57 ff15???????? 50 }
            // n = 5, score = 100
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   7510                 | jne                 0x12
            //   57                   | push                edi
            //   ff15????????         |                     
            //   50                   | push                eax

        $sequence_25 = { 8b46f8 834de4ff 49 c745e8ff000000 8b3c857c303400 c745ecffff0000 }
            // n = 6, score = 100
            //   8b46f8               | mov                 eax, dword ptr [esi - 8]
            //   834de4ff             | or                  dword ptr [ebp - 0x1c], 0xffffffff
            //   49                   | dec                 ecx
            //   c745e8ff000000       | mov                 dword ptr [ebp - 0x18], 0xff
            //   8b3c857c303400       | mov                 edi, dword ptr [eax*4 + 0x34307c]
            //   c745ecffff0000       | mov                 dword ptr [ebp - 0x14], 0xffff

        $sequence_26 = { 80fb30 7c18 8bd6 eb09 83f937 7f2a }
            // n = 6, score = 100
            //   80fb30               | cmp                 bl, 0x30
            //   7c18                 | jl                  0x1a
            //   8bd6                 | mov                 edx, esi
            //   eb09                 | jmp                 0xb
            //   83f937               | cmp                 ecx, 0x37
            //   7f2a                 | jg                  0x2c

        $sequence_27 = { 8d5108 7e09 8a0e 880a 4a 4e 48 }
            // n = 7, score = 100
            //   8d5108               | lea                 edx, [ecx + 8]
            //   7e09                 | jle                 0xb
            //   8a0e                 | mov                 cl, byte ptr [esi]
            //   880a                 | mov                 byte ptr [edx], cl
            //   4a                   | dec                 edx
            //   4e                   | dec                 esi
            //   48                   | dec                 eax

        $sequence_28 = { e8???????? 8b4d08 8a0408 a2???????? eb07 c605????????00 c705????????4c403400 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8a0408               | mov                 al, byte ptr [eax + ecx]
            //   a2????????           |                     
            //   eb07                 | jmp                 9
            //   c605????????00       |                     
            //   c705????????4c403400     |     

        $sequence_29 = { 8b04855c303400 c1e002 50 6a40 ff15???????? }
            // n = 5, score = 100
            //   8b04855c303400       | mov                 eax, dword ptr [eax*4 + 0x34305c]
            //   c1e002               | shl                 eax, 2
            //   50                   | push                eax
            //   6a40                 | push                0x40
            //   ff15????????         |                     

        $sequence_30 = { 8945c4 eb17 68???????? 56 }
            // n = 4, score = 100
            //   8945c4               | mov                 dword ptr [ebp - 0x3c], eax
            //   eb17                 | jmp                 0x19
            //   68????????           |                     
            //   56                   | push                esi

        $sequence_31 = { 0f87c9000000 ff248580233400 832700 e9???????? }
            // n = 4, score = 100
            //   0f87c9000000         | ja                  0xcf
            //   ff248580233400       | jmp                 dword ptr [eax*4 + 0x342380]
            //   832700               | and                 dword ptr [edi], 0
            //   e9????????           |                     

    condition:
        7 of them and filesize < 1350656
}