win.neutrino (Back to overview)

Neutrino

aka: Kasidet
URLhaus      

There is no description at this point.

References
http://blog.trendmicro.com/trendlabs-security-intelligence/credit-card-scraping-kasidet-builder-leads-to-spike-in-detections/
http://malware.dontneedcoffee.com/2014/06/neutrino-bot-aka-kasidet.html
http://securitykitten.github.io/an-evening-with-n3utrino/
http://www.peppermalware.com/2019/01/analysis-of-neutrino-bot-sample-2018-08-27.html
https://blog.malwarebytes.com/cybercrime/2017/01/post-holiday-spam-campaign-delivers-neutrino-bot/
https://blog.malwarebytes.com/threat-analysis/2015/08/inside-neutrino-botnet-builder/
https://blog.malwarebytes.com/threat-analysis/2017/02/new-neutrino-bot-comes-in-a-protective-loader/
https://journal.cecyf.fr/ojs/index.php/cybin/article/view/22
https://malwarebreakdown.com/2017/04/03/shadow-server-domains-leads-to-rig-exploit-kit-dropping-smoke-loader-which-downloads-neutrino-bot-aka-kasidet
https://securityblog.switch.ch/2017/07/07/94-ch-li-domain-names-hijacked-and-used-for-drive-by/
https://www.zscaler.com/blogs/research/malicious-office-files-dropping-kasidet-and-dridex
Yara Rules
[TLP:WHITE] win_neutrino_auto (20190620 | autogenerated rule brought to you by yara-signator)
rule win_neutrino_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2019-07-05"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator 0.2a"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.neutrino"
        malpedia_version = "20190620"
        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 = { 74?? 8d45fc 50 ff15???????? 50 ff15???????? 837dfc00 }
            // n = 7, score = 2300
            //   74??                 |                     
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   837dfc00             | cmp                 dword ptr [ebp - 4], 0

        $sequence_1 = { 74?? 8d45fc 50 ff15???????? 50 ff15???????? 837dfc00 }
            // n = 7, score = 2300
            //   74??                 |                     
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   837dfc00             | cmp                 dword ptr [ebp - 4], 0

        $sequence_2 = { 74?? 8d45fc 50 ff15???????? 50 ff15???????? 837dfc00 }
            // n = 7, score = 2300
            //   74??                 |                     
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   837dfc00             | cmp                 dword ptr [ebp - 4], 0

        $sequence_3 = { ff15???????? 837dfc00 0f95c0 8be5 }
            // n = 4, score = 1500
            //   ff15????????         |                     
            //   837dfc00             | cmp                 dword ptr [ebp - 4], 0
            //   0f95c0               | setne               al
            //   8be5                 | mov                 esp, ebp

        $sequence_4 = { 6a00 ff15???????? 6880000000 ff15???????? }
            // n = 4, score = 1500
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   6880000000           | push                0x80
            //   ff15????????         |                     

        $sequence_5 = { 8b4dfc 3b4d14 7e?? 83c8ff eb?? eb?? 0fb65510 }
            // n = 7, score = 1500
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   3b4d14               | cmp                 ecx, dword ptr [ebp + 0x14]
            //   7e??                 |                     
            //   83c8ff               | or                  eax, 0xffffffff
            //   eb??                 |                     
            //   eb??                 |                     
            //   0fb65510             | movzx               edx, byte ptr [ebp + 0x10]

        $sequence_6 = { 8b4d0c 894dfc 8b55f4 83c201 8955f4 eb?? }
            // n = 6, score = 1500
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   83c201               | add                 edx, 1
            //   8955f4               | mov                 dword ptr [ebp - 0xc], edx
            //   eb??                 |                     

        $sequence_7 = { 8b4508 83c001 894508 8b4dfc 3b4d14 7e?? }
            // n = 6, score = 1500
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   83c001               | add                 eax, 1
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   3b4d14               | cmp                 ecx, dword ptr [ebp + 0x14]
            //   7e??                 |                     

        $sequence_8 = { 50 ff15???????? 837dfc00 0f95c0 8be5 }
            // n = 5, score = 1500
            //   50                   | push                eax
            //   ff15????????         |                     
            //   837dfc00             | cmp                 dword ptr [ebp - 4], 0
            //   0f95c0               | setne               al
            //   8be5                 | mov                 esp, ebp

        $sequence_9 = { 8945fc 8b4d08 83c101 894d08 0fb6550c 83fa01 75?? }
            // n = 7, score = 1500
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   83c101               | add                 ecx, 1
            //   894d08               | mov                 dword ptr [ebp + 8], ecx
            //   0fb6550c             | movzx               edx, byte ptr [ebp + 0xc]
            //   83fa01               | cmp                 edx, 1
            //   75??                 |                     

        $sequence_10 = { 8b55f4 0fbe02 85c0 74?? 8b4df4 0fbe11 8b45fc }
            // n = 7, score = 1500
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   0fbe02               | movsx               eax, byte ptr [edx]
            //   85c0                 | test                eax, eax
            //   74??                 |                     
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   0fbe11               | movsx               edx, byte ptr [ecx]
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]

        $sequence_11 = { 50 ff15???????? 50 ff15???????? 837dfc00 0f95c0 8be5 }
            // n = 7, score = 1500
            //   50                   | push                eax
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   837dfc00             | cmp                 dword ptr [ebp - 4], 0
            //   0f95c0               | setne               al
            //   8be5                 | mov                 esp, ebp

        $sequence_12 = { 83fa01 75?? 8b45fc 83c001 8945fc }
            // n = 5, score = 1500
            //   83fa01               | cmp                 edx, 1
            //   75??                 |                     
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   83c001               | add                 eax, 1
            //   8945fc               | mov                 dword ptr [ebp - 4], eax

        $sequence_13 = { ff15???????? 50 ff15???????? 837dfc00 0f95c0 8be5 }
            // n = 6, score = 1500
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   837dfc00             | cmp                 dword ptr [ebp - 4], 0
            //   0f95c0               | setne               al
            //   8be5                 | mov                 esp, ebp

        $sequence_14 = { 83c101 894d08 0fb6550c 83fa01 75?? 8b4508 83c001 }
            // n = 7, score = 1500
            //   83c101               | add                 ecx, 1
            //   894d08               | mov                 dword ptr [ebp + 8], ecx
            //   0fb6550c             | movzx               edx, byte ptr [ebp + 0xc]
            //   83fa01               | cmp                 edx, 1
            //   75??                 |                     
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   83c001               | add                 eax, 1

        $sequence_15 = { e9???????? 6a01 ff15???????? 85c0 }
            // n = 4, score = 1500
            //   e9????????           |                     
            //   6a01                 | push                1
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_16 = { 668b03 66894210 83c302 f645fe02 74?? 834a1804 }
            // n = 6, score = 1300
            //   668b03               | mov                 ax, word ptr [ebx]
            //   66894210             | mov                 word ptr [edx + 0x10], ax
            //   83c302               | add                 ebx, 2
            //   f645fe02             | test                byte ptr [ebp - 2], 2
            //   74??                 |                     
            //   834a1804             | or                  dword ptr [edx + 0x18], 4

        $sequence_17 = { c645fc03 0f8????????? 807dfd05 eb?? 807dfd04 }
            // n = 5, score = 1300
            //   c645fc03             | mov                 byte ptr [ebp - 4], 3
            //   0f8?????????         |                     
            //   807dfd05             | cmp                 byte ptr [ebp - 3], 5
            //   eb??                 |                     
            //   807dfd04             | cmp                 byte ptr [ebp - 3], 4

        $sequence_18 = { 74?? 8bd0 8b00 85c0 75?? c3 8b4804 }
            // n = 7, score = 1300
            //   74??                 |                     
            //   8bd0                 | mov                 edx, eax
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   85c0                 | test                eax, eax
            //   75??                 |                     
            //   c3                   | ret                 
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]

        $sequence_19 = { 68fa000000 ff15???????? eb?? 6a10 }
            // n = 4, score = 1300
            //   68fa000000           | push                0xfa
            //   ff15????????         |                     
            //   eb??                 |                     
            //   6a10                 | push                0x10

        $sequence_20 = { 8b4508 53 57 6a1c }
            // n = 4, score = 1300
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   53                   | push                ebx
            //   57                   | push                edi
            //   6a1c                 | push                0x1c

        $sequence_21 = { c3 8b4804 890e ff4808 }
            // n = 4, score = 1300
            //   c3                   | ret                 
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   890e                 | mov                 dword ptr [esi], ecx
            //   ff4808               | dec                 dword ptr [eax + 8]

        $sequence_22 = { 68fa000000 ff15???????? eb?? 6a10 }
            // n = 4, score = 1300
            //   68fa000000           | push                0xfa
            //   ff15????????         |                     
            //   eb??                 |                     
            //   6a10                 | push                0x10

        $sequence_23 = { 8d4de0 51 50 895de0 ff15???????? e9???????? 837de010 }
            // n = 7, score = 1300
            //   8d4de0               | lea                 ecx, [ebp - 0x20]
            //   51                   | push                ecx
            //   50                   | push                eax
            //   895de0               | mov                 dword ptr [ebp - 0x20], ebx
            //   ff15????????         |                     
            //   e9????????           |                     
            //   837de010             | cmp                 dword ptr [ebp - 0x20], 0x10

        $sequence_24 = { 73?? 8b3b 0fb6f2 6a05 58 }
            // n = 5, score = 1300
            //   73??                 |                     
            //   8b3b                 | mov                 edi, dword ptr [ebx]
            //   0fb6f2               | movzx               esi, dl
            //   6a05                 | push                5
            //   58                   | pop                 eax

        $sequence_25 = { 6800020000 51 ff35???????? c7460480000000 }
            // n = 4, score = 1300
            //   6800020000           | push                0x200
            //   51                   | push                ecx
            //   ff35????????         |                     
            //   c7460480000000       | mov                 dword ptr [esi + 4], 0x80

        $sequence_26 = { 83c404 85c0 0f95c2 0fb6c2 }
            // n = 4, score = 1200
            //   83c404               | add                 esp, 4
            //   85c0                 | test                eax, eax
            //   0f95c2               | setne               dl
            //   0fb6c2               | movzx               eax, dl

        $sequence_27 = { 74?? 8b45f8 85c0 74?? c6040600 }
            // n = 5, score = 1100
            //   74??                 |                     
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   85c0                 | test                eax, eax
            //   74??                 |                     
            //   c6040600             | mov                 byte ptr [esi + eax], 0

        $sequence_28 = { 83c414 84c0 74?? 0375fc 8d45f4 }
            // n = 5, score = 1100
            //   83c414               | add                 esp, 0x14
            //   84c0                 | test                al, al
            //   74??                 |                     
            //   0375fc               | add                 esi, dword ptr [ebp - 4]
            //   8d45f4               | lea                 eax, [ebp - 0xc]

        $sequence_29 = { 84c0 74?? 8b45f8 85c0 74?? c6040600 }
            // n = 6, score = 1100
            //   84c0                 | test                al, al
            //   74??                 |                     
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   85c0                 | test                eax, eax
            //   74??                 |                     
            //   c6040600             | mov                 byte ptr [esi + eax], 0

        $sequence_30 = { 83c414 84c0 74?? 8b45f8 85c0 }
            // n = 5, score = 1100
            //   83c414               | add                 esp, 0x14
            //   84c0                 | test                al, al
            //   74??                 |                     
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   85c0                 | test                eax, eax

        $sequence_31 = { 84c0 74?? 8b45f8 85c0 74?? c6040600 8bc6 }
            // n = 7, score = 1100
            //   84c0                 | test                al, al
            //   74??                 |                     
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   85c0                 | test                eax, eax
            //   74??                 |                     
            //   c6040600             | mov                 byte ptr [esi + eax], 0
            //   8bc6                 | mov                 eax, esi

        $sequence_32 = { 5d c3 55 8bec 837d0800 74?? 6800800000 }
            // n = 7, score = 1000
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   837d0800             | cmp                 dword ptr [ebp + 8], 0
            //   74??                 |                     
            //   6800800000           | push                0x8000

        $sequence_33 = { 83c40c 6804010000 8d85f8fdffff 50 }
            // n = 4, score = 1000
            //   83c40c               | add                 esp, 0xc
            //   6804010000           | push                0x104
            //   8d85f8fdffff         | lea                 eax, [ebp - 0x208]
            //   50                   | push                eax

        $sequence_34 = { 46 33d2 f7f6 8d0417 5f 5e c3 }
            // n = 7, score = 900
            //   46                   | inc                 esi
            //   33d2                 | xor                 edx, edx
            //   f7f6                 | div                 esi
            //   8d0417               | lea                 eax, [edi + edx]
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   c3                   | ret                 

    condition:
        7 of them
}
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