SYMBOLCOMMON_NAMEaka. SYNONYMS
win.waterminer (Back to overview)

WaterMiner


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References
2017-10-17Minerva LabsMinerva Labs Research Team
@online{team:20171017:waterminer:7623525, author = {Minerva Labs Research Team}, title = {{WaterMiner – a New Evasive Crypto-Miner}}, date = {2017-10-17}, organization = {Minerva Labs}, url = {https://blog.minerva-labs.com/waterminer-a-new-evasive-crypto-miner}, language = {English}, urldate = {2020-01-06} } WaterMiner – a New Evasive Crypto-Miner
WaterMiner
Yara Rules
[TLP:WHITE] win_waterminer_auto (20220411 | Detects win.waterminer.)
rule win_waterminer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.waterminer."
        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.waterminer"
        malpedia_rule_date = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 8b55fc 52 ff15???????? 3305???????? b904000000 6bc91c 898180434b00 }
            // n = 7, score = 100
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   52                   | push                edx
            //   ff15????????         |                     
            //   3305????????         |                     
            //   b904000000           | mov                 ecx, 4
            //   6bc91c               | imul                ecx, ecx, 0x1c
            //   898180434b00         | mov                 dword ptr [ecx + 0x4b4380], eax

        $sequence_1 = { 03442410 4403e8 428b4405e7 418bd5 }
            // n = 4, score = 100
            //   03442410             | mov                 edx, edx
            //   4403e8               | dec                 esp
            //   428b4405e7           | lea                 eax, dword ptr [0x55894]
            //   418bd5               | add                 eax, dword ptr [esp + 0xc]

        $sequence_2 = { 03bc24a8000000 488bcd 4c8d0d35cb0300 83e13f }
            // n = 4, score = 100
            //   03bc24a8000000       | lea                 eax, dword ptr [0x55894]
            //   488bcd               | inc                 ecx
            //   4c8d0d35cb0300       | xor                 edx, ebp
            //   83e13f               | inc                 esp

        $sequence_3 = { 8b4dfc 89048da8064b00 ebd4 8be5 }
            // n = 4, score = 100
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   89048da8064b00       | mov                 dword ptr [ecx*4 + 0x4b06a8], eax
            //   ebd4                 | jmp                 0xffffffd6
            //   8be5                 | mov                 esp, ebp

        $sequence_4 = { 02d0 49ffc3 418d4001 881418 }
            // n = 4, score = 100
            //   02d0                 | cmp                 al, 9
            //   49ffc3               | add                 cl, al
            //   418d4001             | inc                 ecx
            //   881418               | mov                 byte ptr [eax + ebx], cl

        $sequence_5 = { 68???????? 64a100000000 50 81ec3c020000 53 56 57 }
            // n = 7, score = 100
            //   68????????           |                     
            //   64a100000000         | mov                 eax, dword ptr fs:[0]
            //   50                   | push                eax
            //   81ec3c020000         | sub                 esp, 0x23c
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi

        $sequence_6 = { 03c0 2bc8 0f84ec040000 8d41ff 8b848288d20600 }
            // n = 5, score = 100
            //   03c0                 | inc                 esp
            //   2bc8                 | add                 edx, eax
            //   0f84ec040000         | dec                 eax
            //   8d41ff               | lea                 eax, dword ptr [0x5561a]
            //   8b848288d20600       | inc                 ecx

        $sequence_7 = { 0344240c 4403d0 488d051a560500 418b0400 }
            // n = 4, score = 100
            //   0344240c             | inc                 ebx
            //   4403d0               | inc                 ecx
            //   488d051a560500       | lea                 eax, dword ptr [eax + 1]
            //   418b0400             | mov                 byte ptr [eax + ebx], dl

        $sequence_8 = { 0344240c 4403d0 428b4405e7 418bd2 }
            // n = 4, score = 100
            //   0344240c             | inc                 ecx
            //   4403d0               | lea                 eax, dword ptr [eax + 1]
            //   428b4405e7           | mov                 byte ptr [eax + ebx], dl
            //   418bd2               | add                 dl, al

        $sequence_9 = { eb07 c745ecd8064b00 8b55ec 0fbe4204 83e020 7437 }
            // n = 6, score = 100
            //   eb07                 | jmp                 9
            //   c745ecd8064b00       | mov                 dword ptr [ebp - 0x14], 0x4b06d8
            //   8b55ec               | mov                 edx, dword ptr [ebp - 0x14]
            //   0fbe4204             | movsx               eax, byte ptr [edx + 4]
            //   83e020               | and                 eax, 0x20
            //   7437                 | je                  0x39

        $sequence_10 = { 02c8 41880c18 418a03 240f }
            // n = 4, score = 100
            //   02c8                 | or                  byte ptr [ecx + edi + 0x3d], al
            //   41880c18             | lea                 eax, dword ptr [edx + edx]
            //   418a03               | dec                 eax
            //   240f                 | mov                 ebx, dword ptr [esp + 0x50]

        $sequence_11 = { 8b45fc 8b04c5a4044b00 eb37 ebd4 837d0813 720f }
            // n = 6, score = 100
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8b04c5a4044b00       | mov                 eax, dword ptr [eax*8 + 0x4b04a4]
            //   eb37                 | jmp                 0x39
            //   ebd4                 | jmp                 0xffffffd6
            //   837d0813             | cmp                 dword ptr [ebp + 8], 0x13
            //   720f                 | jb                  0x11

        $sequence_12 = { 0fb74dfc 83f92c 753d 6a00 6848040000 68???????? 68???????? }
            // n = 7, score = 100
            //   0fb74dfc             | movzx               ecx, word ptr [ebp - 4]
            //   83f92c               | cmp                 ecx, 0x2c
            //   753d                 | jne                 0x3f
            //   6a00                 | push                0
            //   6848040000           | push                0x448
            //   68????????           |                     
            //   68????????           |                     

        $sequence_13 = { 6bc00c 05???????? 8bf4 50 6a00 }
            // n = 5, score = 100
            //   6bc00c               | imul                eax, eax, 0xc
            //   05????????           |                     
            //   8bf4                 | mov                 esi, esp
            //   50                   | push                eax
            //   6a00                 | push                0

        $sequence_14 = { 02c0 0844393d 8d0412 488b5c2450 }
            // n = 4, score = 100
            //   02c0                 | add                 al, al
            //   0844393d             | or                  byte ptr [ecx + edi + 0x3d], al
            //   8d0412               | lea                 eax, dword ptr [edx + edx]
            //   488b5c2450           | dec                 eax

        $sequence_15 = { 83e11f c1e106 030c85c02b4b00 898d84f5ffff }
            // n = 4, score = 100
            //   83e11f               | and                 ecx, 0x1f
            //   c1e106               | shl                 ecx, 6
            //   030c85c02b4b00       | add                 ecx, dword ptr [eax*4 + 0x4b2bc0]
            //   898d84f5ffff         | mov                 dword ptr [ebp - 0xa7c], ecx

    condition:
        7 of them and filesize < 1556480
}
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