rule win_industroyer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.industroyer."
        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.industroyer"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 6a04 50 6a03 53 c745f860ea0000 ffd6 }
            // n = 6, score = 600
            //   6a04                 | push                4
            //   50                   | push                eax
            //   6a03                 | push                3
            //   53                   | push                ebx
            //   c745f860ea0000       | mov                 dword ptr [ebp - 8], 0xea60
            //   ffd6                 | call                esi

        $sequence_1 = { 2bf2 57 33ff 3bd0 0f47f1 8b4d08 }
            // n = 6, score = 600
            //   2bf2                 | sub                 esi, edx
            //   57                   | push                edi
            //   33ff                 | xor                 edi, edi
            //   3bd0                 | cmp                 edx, eax
            //   0f47f1               | cmova               esi, ecx
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]

        $sequence_2 = { 6a10 50 e8???????? 8b5d08 83c410 814dd401010000 }
            // n = 6, score = 600
            //   6a10                 | push                0x10
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b5d08               | mov                 ebx, dword ptr [ebp + 8]
            //   83c410               | add                 esp, 0x10
            //   814dd401010000       | or                  dword ptr [ebp - 0x2c], 0x101

        $sequence_3 = { 50 8945e0 e8???????? 8945f8 e8???????? }
            // n = 5, score = 600
            //   50                   | push                eax
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   e8????????           |                     
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   e8????????           |                     

        $sequence_4 = { 8d45fc 50 6a04 8d45f0 50 57 }
            // n = 6, score = 600
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   6a04                 | push                4
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   57                   | push                edi

        $sequence_5 = { 33f6 50 ff35???????? ff15???????? 85c0 0f4575f8 }
            // n = 6, score = 600
            //   33f6                 | xor                 esi, esi
            //   50                   | push                eax
            //   ff35????????         |                     
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f4575f8             | cmovne              esi, dword ptr [ebp - 8]

        $sequence_6 = { 6800000008 56 8d85a0fdffff 50 51 ff7704 }
            // n = 6, score = 600
            //   6800000008           | push                0x8000000
            //   56                   | push                esi
            //   8d85a0fdffff         | lea                 eax, [ebp - 0x260]
            //   50                   | push                eax
            //   51                   | push                ecx
            //   ff7704               | push                dword ptr [edi + 4]

        $sequence_7 = { e8???????? 50 6a03 56 894710 e8???????? }
            // n = 6, score = 600
            //   e8????????           |                     
            //   50                   | push                eax
            //   6a03                 | push                3
            //   56                   | push                esi
            //   894710               | mov                 dword ptr [edi + 0x10], eax
            //   e8????????           |                     

        $sequence_8 = { b900200000 0f46f9 3d00001000 b900100000 }
            // n = 4, score = 400
            //   b900200000           | mov                 ecx, 0x2000
            //   0f46f9               | cmovbe              edi, ecx
            //   3d00001000           | cmp                 eax, 0x100000
            //   b900100000           | mov                 ecx, 0x1000

        $sequence_9 = { ff15???????? 85c0 742c 83c604 }
            // n = 4, score = 400
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   742c                 | je                  0x2e
            //   83c604               | add                 esi, 4

        $sequence_10 = { b900800000 bfffff0000 0f46f9 3d00005000 b900400000 }
            // n = 5, score = 400
            //   b900800000           | mov                 ecx, 0x8000
            //   bfffff0000           | mov                 edi, 0xffff
            //   0f46f9               | cmovbe              edi, ecx
            //   3d00005000           | cmp                 eax, 0x500000
            //   b900400000           | mov                 ecx, 0x4000

        $sequence_11 = { 8907 894f04 e8???????? b9???????? 83c408 c700???????? }
            // n = 6, score = 400
            //   8907                 | mov                 dword ptr [edi], eax
            //   894f04               | mov                 dword ptr [edi + 4], ecx
            //   e8????????           |                     
            //   b9????????           |                     
            //   83c408               | add                 esp, 8
            //   c700????????         |                     

        $sequence_12 = { 3b35???????? 72eb b101 e8???????? }
            // n = 4, score = 400
            //   3b35????????         |                     
            //   72eb                 | jb                  0xffffffed
            //   b101                 | mov                 cl, 1
            //   e8????????           |                     

        $sequence_13 = { 6a00 6a00 ff15???????? 89849da0efffff 83c604 43 }
            // n = 6, score = 400
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   89849da0efffff       | mov                 dword ptr [ebp + ebx*4 - 0x1060], eax
            //   83c604               | add                 esi, 4
            //   43                   | inc                 ebx

        $sequence_14 = { 56 8bd8 57 53 e8???????? 8b0d???????? }
            // n = 6, score = 400
            //   56                   | push                esi
            //   8bd8                 | mov                 ebx, eax
            //   57                   | push                edi
            //   53                   | push                ebx
            //   e8????????           |                     
            //   8b0d????????         |                     

        $sequence_15 = { 83c604 43 81fe88000000 7291 899d98efffff }
            // n = 5, score = 400
            //   83c604               | add                 esi, 4
            //   43                   | inc                 ebx
            //   81fe88000000         | cmp                 esi, 0x88
            //   7291                 | jb                  0xffffff93
            //   899d98efffff         | mov                 dword ptr [ebp - 0x1068], ebx

        $sequence_16 = { ff742414 ff15???????? 57 ff15???????? ff15???????? 8b4c244c }
            // n = 6, score = 200
            //   ff742414             | push                dword ptr [esp + 0x14]
            //   ff15????????         |                     
            //   57                   | push                edi
            //   ff15????????         |                     
            //   ff15????????         |                     
            //   8b4c244c             | mov                 ecx, dword ptr [esp + 0x4c]

        $sequence_17 = { c3 8b04c574cb4000 5d c3 8bff }
            // n = 5, score = 200
            //   c3                   | ret                 
            //   8b04c574cb4000       | mov                 eax, dword ptr [eax*8 + 0x40cb74]
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   8bff                 | mov                 edi, edi

        $sequence_18 = { 8bd9 c785d0feffff28010000 ff15???????? 8bf0 83feff 7520 }
            // n = 6, score = 200
            //   8bd9                 | mov                 ebx, ecx
            //   c785d0feffff28010000     | mov    dword ptr [ebp - 0x130], 0x128
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   83feff               | cmp                 esi, -1
            //   7520                 | jne                 0x22

        $sequence_19 = { 6880ee3600 ff15???????? 68???????? ff15???????? 85c0 7417 }
            // n = 6, score = 200
            //   6880ee3600           | push                0x36ee80
            //   ff15????????         |                     
            //   68????????           |                     
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7417                 | je                  0x19

        $sequence_20 = { 57 8d7a34 8955fc 0fb603 8d7334 8802 }
            // n = 6, score = 200
            //   57                   | push                edi
            //   8d7a34               | lea                 edi, [edx + 0x34]
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   0fb603               | movzx               eax, byte ptr [ebx]
            //   8d7334               | lea                 esi, [ebx + 0x34]
            //   8802                 | mov                 byte ptr [edx], al

        $sequence_21 = { 8b0e 80790468 7519 0fb64106 83e800 7425 }
            // n = 6, score = 200
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   80790468             | cmp                 byte ptr [ecx + 4], 0x68
            //   7519                 | jne                 0x1b
            //   0fb64106             | movzx               eax, byte ptr [ecx + 6]
            //   83e800               | sub                 eax, 0
            //   7425                 | je                  0x27

        $sequence_22 = { 0f8258030000 83fb23 0f874f030000 8bd8 }
            // n = 4, score = 200
            //   0f8258030000         | jb                  0x35e
            //   83fb23               | cmp                 ebx, 0x23
            //   0f874f030000         | ja                  0x355
            //   8bd8                 | mov                 ebx, eax

        $sequence_23 = { 1bc0 23c1 eb55 8b1c9db8c14000 56 6800080000 }
            // n = 6, score = 200
            //   1bc0                 | sbb                 eax, eax
            //   23c1                 | and                 eax, ecx
            //   eb55                 | jmp                 0x57
            //   8b1c9db8c14000       | mov                 ebx, dword ptr [ebx*4 + 0x40c1b8]
            //   56                   | push                esi
            //   6800080000           | push                0x800

        $sequence_24 = { 837c243c04 0f85bd000000 ff7704 ff15???????? ff7708 ff15???????? }
            // n = 6, score = 200
            //   837c243c04           | cmp                 dword ptr [esp + 0x3c], 4
            //   0f85bd000000         | jne                 0xc3
            //   ff7704               | push                dword ptr [edi + 4]
            //   ff15????????         |                     
            //   ff7708               | push                dword ptr [edi + 8]
            //   ff15????????         |                     

        $sequence_25 = { ff35???????? ff15???????? 6800000100 8d85f0fffeff 6a00 }
            // n = 5, score = 200
            //   ff35????????         |                     
            //   ff15????????         |                     
            //   6800000100           | push                0x10000
            //   8d85f0fffeff         | lea                 eax, [ebp - 0x10010]
            //   6a00                 | push                0

        $sequence_26 = { 7530 83790800 752a eb0b }
            // n = 4, score = 200
            //   7530                 | jne                 0x32
            //   83790800             | cmp                 dword ptr [ecx + 8], 0
            //   752a                 | jne                 0x2c
            //   eb0b                 | jmp                 0xd

        $sequence_27 = { 83e13f c1f806 6bc930 8855d4 8b0485d01f0210 88540828 }
            // n = 6, score = 200
            //   83e13f               | and                 ecx, 0x3f
            //   c1f806               | sar                 eax, 6
            //   6bc930               | imul                ecx, ecx, 0x30
            //   8855d4               | mov                 byte ptr [ebp - 0x2c], dl
            //   8b0485d01f0210       | mov                 eax, dword ptr [eax*4 + 0x10021fd0]
            //   88540828             | mov                 byte ptr [eax + ecx + 0x28], dl

        $sequence_28 = { 7253 83fb23 7753 8bd8 53 }
            // n = 5, score = 200
            //   7253                 | jb                  0x55
            //   83fb23               | cmp                 ebx, 0x23
            //   7753                 | ja                  0x55
            //   8bd8                 | mov                 ebx, eax
            //   53                   | push                ebx

        $sequence_29 = { c705????????04000000 c705????????00000000 c705????????00000000 ffd3 a1???????? }
            // n = 5, score = 200
            //   c705????????04000000     |     
            //   c705????????00000000     |     
            //   c705????????00000000     |     
            //   ffd3                 | call                ebx
            //   a1????????           |                     

        $sequence_30 = { ff15???????? 8945f0 68???????? ff35???????? c705????????00000000 }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   68????????           |                     
            //   ff35????????         |                     
            //   c705????????00000000     |     

        $sequence_31 = { d9f1 833d????????00 0f851c0b0000 8d0d90fd4000 }
            // n = 4, score = 200
            //   d9f1                 | fyl2x               
            //   833d????????00       |                     
            //   0f851c0b0000         | jne                 0xb22
            //   8d0d90fd4000         | lea                 ecx, [0x40fd90]

        $sequence_32 = { 89570c 893e e8???????? 6a00 6a01 }
            // n = 5, score = 100
            //   89570c               | mov                 dword ptr [edi + 0xc], edx
            //   893e                 | mov                 dword ptr [esi], edi
            //   e8????????           |                     
            //   6a00                 | push                0
            //   6a01                 | push                1

        $sequence_33 = { 0f86d7050000 8d4e18 8d4618 51 ff7104 8d8d50feffff ff30 }
            // n = 7, score = 100
            //   0f86d7050000         | jbe                 0x5dd
            //   8d4e18               | lea                 ecx, [esi + 0x18]
            //   8d4618               | lea                 eax, [esi + 0x18]
            //   51                   | push                ecx
            //   ff7104               | push                dword ptr [ecx + 4]
            //   8d8d50feffff         | lea                 ecx, [ebp - 0x1b0]
            //   ff30                 | push                dword ptr [eax]

        $sequence_34 = { 51 57 8b00 894508 3bc1 75c3 894dcc }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   57                   | push                edi
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   3bc1                 | cmp                 eax, ecx
            //   75c3                 | jne                 0xffffffc5
            //   894dcc               | mov                 dword ptr [ebp - 0x34], ecx

        $sequence_35 = { 8945f8 e8???????? 807d0800 59 }
            // n = 4, score = 100
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   e8????????           |                     
            //   807d0800             | cmp                 byte ptr [ebp + 8], 0
            //   59                   | pop                 ecx

        $sequence_36 = { 83c40c 8bf8 897dec 8365fc00 8b4604 }
            // n = 5, score = 100
            //   83c40c               | add                 esp, 0xc
            //   8bf8                 | mov                 edi, eax
            //   897dec               | mov                 dword ptr [ebp - 0x14], edi
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   8b4604               | mov                 eax, dword ptr [esi + 4]

        $sequence_37 = { 53 8d4dd8 8975f8 e8???????? 8b7d08 33c9 }
            // n = 6, score = 100
            //   53                   | push                ebx
            //   8d4dd8               | lea                 ecx, [ebp - 0x28]
            //   8975f8               | mov                 dword ptr [ebp - 8], esi
            //   e8????????           |                     
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   33c9                 | xor                 ecx, ecx

        $sequence_38 = { e8???????? 83c40c 8d8df8feffff 56 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8d8df8feffff         | lea                 ecx, [ebp - 0x108]
            //   56                   | push                esi

        $sequence_39 = { c1f803 3945ec 7760 8b45e8 8d1cc1 eb33 }
            // n = 6, score = 100
            //   c1f803               | sar                 eax, 3
            //   3945ec               | cmp                 dword ptr [ebp - 0x14], eax
            //   7760                 | ja                  0x62
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   8d1cc1               | lea                 ebx, [ecx + eax*8]
            //   eb33                 | jmp                 0x35

    condition:
        7 of them and filesize < 983040
}

import "pe"

rule win_industroyer_w0 {
    meta:
        description = "CRASHOVERRIDE v1 Suspicious Export"
        author = "Dragos Inc"
        reference = "https://dragos.com/blog/crashoverride/"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.industroyer"
        malpedia_version = "20170615"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    condition:
        pe.exports("Crash") & pe.characteristics
}

import "pe"

rule win_industroyer_w1 {
    meta:
        description = "CRASHOVERRIDE v1 Wiper"
        author = "Dragos Inc"
        reference = "https://dragos.com/blog/crashoverride/"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.industroyer"
        malpedia_version = "20170615"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $s0 = "SYS_BASCON.COM" fullword nocase wide
        $s1 = ".pcmp" fullword nocase wide
        $s2 = ".pcmi" fullword nocase wide
        $s3 = ".pcmt" fullword nocase wide
        $s4 = ".cin" fullword nocase wide
        
    condition:
        pe.exports("Crash") and any of ($s*)
}

import "pe"

rule win_industroyer_w2 {
    meta:
        description = "CRASHOVERRIDE v1 Suspicious Strings and Export"
        author = "Dragos Inc"
        reference = "https://dragos.com/blog/crashoverride/"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.industroyer"
        malpedia_version = "20170615"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $s0 = "101.dll" fullword nocase wide
        $s1 = "Crash101.dll" fullword nocase wide
        $s2 = "104.dll" fullword nocase wide
        $s3 = "Crash104.dll" fullword nocase wide
        $s4 = "61850.dll" fullword nocase wide
        $s5 = "Crash61850.dll" fullword nocase wide
        $s6 = "OPCClientDemo.dll" fullword nocase wide
        $s7 = "OPC" fullword nocase wide
        $s8 = "CrashOPCClientDemo.dll" fullword nocase wide
        $s9 = "D2MultiCommService.exe" fullword nocase wide
        $s10 = "CrashD2MultiCommService.exe" fullword nocase wide
        $s11 = "61850.exe" fullword nocase wide
        $s12 = "OPC.exe" fullword nocase wide
        $s13 = "haslo.exe" fullword nocase wide
        $s14 = "haslo.dat" fullword nocase wide     
    condition:
        any of ($s*) and pe.exports("Crash")
}

rule win_industroyer_w3 { 
    meta:
        description = "IEC-104 Interaction Module Program Strings"
        author = "Dragos Inc"
        reference = "https://dragos.com/blog/crashoverride/"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.industroyer"
        malpedia_version = "20170615"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:      
        $s1 = "IEC-104 client: ip=%s; port=%s; ASDU=%u" nocase wide ascii 
        $s2 = " MSTR ->> SLV" nocase wide ascii 
        $s3 = " MSTR <<- SLV" nocase wide ascii 
        $s4 = "Unknown APDU format !!!" nocase wide ascii 
        $s5 = "iec104.log" nocase wide ascii 
    condition:      
        any of ($s*)
}

rule win_industroyer_w4 {
    meta:
        description = "CRASHOVERRIDE v1 Config File Parsing"
        author = "Dragos Inc"
        reference = "https://dragos.com/blog/crashoverride/"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.industroyer"
        malpedia_version = "20170615"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $s0 = { 68 e8 ?? ?? ?? 6a 00 e8 a3 ?? ?? ?? 8b f8 83 c4 ?8 }
        $s1 = { 8a 10 3a 11 75 ?? 84 d2 74 12 }
        $s2 = { 33 c0 eb ?? 1b c0 83 c8 ?? }
        $s3 = { 85 c0 75 ?? 8d 95 ?? ?? ?? ?? 8b cf ?? ?? }
    condition:
        all of them
}

rule win_industroyer_w5 {
    meta:
        description = "Blank mutex creation assoicated with CRASHOVERRIDE"
        author = "Dragos Inc"
        reference = "https://dragos.com/blog/crashoverride/"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.industroyer"
        malpedia_version = "20170615"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $s1 = { 81 ec 08 02 00 00 57 33 ff 57 57 57 ff 15 ?? ?? 40 00 a3 ?? ?? ?? 00 85 c0 }
        $s2 = { 8d 85 ?? ?? ?? ff 50 57 57 6a 2e 57 ff 15 ?? ?? ?? 00 68 ?? ?? 40 00}
    condition:
        all of them
}

rule win_industroyer_w6 {
    meta:
        description = "Identify service hollowing and persistence setting"
        author = "Dragos Inc"
        reference = "https://dragos.com/blog/crashoverride/"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.industroyer"
        malpedia_version = "20170615"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $s0 = { 33 c9 51 51 51 51 51 51 ?? ?? ?? }
        $s1 = { 6a ff 6a ff 6a ff 50 ff 15 24 ?? 40 00 ff ?? ?? ff 15 20 ?? 40 00 }
    condition:
        all of them
}

rule win_industroyer_w7 {
    meta:
        description = "Registry Wiper functionality assoicated with CRASHOVERRIDE"
        author = "Dragos Inc"
        reference = "https://dragos.com/blog/industroyer/"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.industroyer"
        malpedia_version = "20170615"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $s0 = { 8d 85 a0 ?? ?? ?? 46 50 8d 85 a0 ?? ?? ?? 68 68 0d ?? ?? 50 }
        $s1 = { 6a 02 68 78 0b ?? ?? 6a 02 50 68 b4 0d ?? ?? ff b5 98 ?? ?? ?? ff 15 04 ?? ?? ?? }
        $s2 = { 68 00 02 00 00 8d 85 a0 ?? ?? ?? 50 56 ff b5 9c ?? ?? ?? ff 15 00 ?? ?? ?? 85 c0 }
    condition:
        all of them
}

rule win_industroyer_w8 {
    meta:
        description = "File manipulation actions associated with CRASHOVERRIDE wiper"
        author = "Dragos Inc"
        reference = "https://dragos.com/blog/crashoverride/"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.industroyer"
        malpedia_version = "20170615"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $s0 = { 6a 00 68 80 00 00 00 6a 03 6a 00 6a 02 8b f9 68 00 00 00 40 57 ff 15 1c ?? ?? ?? 8b d8 }
        $s2 = { 6a 00 50 57 56 53 ff 15 4c ?? ?? ?? 56 }
    condition:
        all of them
}