SYMBOLCOMMON_NAMEaka. SYNONYMS
win.remy (Back to overview)

Remy

aka: WINDSHIELD

There is no description at this point.

References
2020SecureworksSecureWorks
@online{secureworks:2020:tin:ccd6795, author = {SecureWorks}, title = {{TIN WOODLAWN}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/tin-woodlawn}, language = {English}, urldate = {2020-05-23} } TIN WOODLAWN
Cobalt Strike KerrDown MimiKatz PHOREAL RatSnif Remy SOUNDBITE APT32
2019-04-02CylanceCylance Research, Intelligence Team
@online{research:20190402:report:83c188f, author = {Cylance Research and Intelligence Team}, title = {{Report: OceanLotus APT Group Leveraging Steganography}}, date = {2019-04-02}, organization = {Cylance}, url = {https://threatvector.cylance.com/en_us/home/report-oceanlotus-apt-group-leveraging-steganography.html}, language = {English}, urldate = {2019-10-22} } Report: OceanLotus APT Group Leveraging Steganography
Remy
Yara Rules
[TLP:WHITE] win_remy_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_remy_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.remy"
        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 = { 33510c 8bc2 c1e810 25ff000000 8b0485a8d24200 8bda c1eb08 }
            // n = 7, score = 200
            //   33510c               | xor                 edx, dword ptr [ecx + 0xc]
            //   8bc2                 | mov                 eax, edx
            //   c1e810               | shr                 eax, 0x10
            //   25ff000000           | and                 eax, 0xff
            //   8b0485a8d24200       | mov                 eax, dword ptr [eax*4 + 0x42d2a8]
            //   8bda                 | mov                 ebx, edx
            //   c1eb08               | shr                 ebx, 8

        $sequence_1 = { 0f8528080000 8b442440 8d48ff 81f9ffff0000 0f8715080000 83f804 0f850c080000 }
            // n = 7, score = 200
            //   0f8528080000         | jne                 0x82e
            //   8b442440             | mov                 eax, dword ptr [esp + 0x40]
            //   8d48ff               | lea                 ecx, [eax - 1]
            //   81f9ffff0000         | cmp                 ecx, 0xffff
            //   0f8715080000         | ja                  0x81b
            //   83f804               | cmp                 eax, 4
            //   0f850c080000         | jne                 0x812

        $sequence_2 = { 8995a8feffff c745e0274d2a4e c745e43e4b522c c745e8524c4d3e c745ec4622473f c745f0484b463a c745f44d424847 }
            // n = 7, score = 200
            //   8995a8feffff         | mov                 dword ptr [ebp - 0x158], edx
            //   c745e0274d2a4e       | mov                 dword ptr [ebp - 0x20], 0x4e2a4d27
            //   c745e43e4b522c       | mov                 dword ptr [ebp - 0x1c], 0x2c524b3e
            //   c745e8524c4d3e       | mov                 dword ptr [ebp - 0x18], 0x3e4d4c52
            //   c745ec4622473f       | mov                 dword ptr [ebp - 0x14], 0x3f472246
            //   c745f0484b463a       | mov                 dword ptr [ebp - 0x10], 0x3a464b48
            //   c745f44d424847       | mov                 dword ptr [ebp - 0xc], 0x4748424d

        $sequence_3 = { e8???????? 8bbd68ffffff 8b47f4 83c40c 83f819 7605 }
            // n = 6, score = 200
            //   e8????????           |                     
            //   8bbd68ffffff         | mov                 edi, dword ptr [ebp - 0x98]
            //   8b47f4               | mov                 eax, dword ptr [edi - 0xc]
            //   83c40c               | add                 esp, 0xc
            //   83f819               | cmp                 eax, 0x19
            //   7605                 | jbe                 7

        $sequence_4 = { 8d9648100000 53 8902 8d45ec 50 8d4c3148 6a01 }
            // n = 7, score = 200
            //   8d9648100000         | lea                 edx, [esi + 0x1048]
            //   53                   | push                ebx
            //   8902                 | mov                 dword ptr [edx], eax
            //   8d45ec               | lea                 eax, [ebp - 0x14]
            //   50                   | push                eax
            //   8d4c3148             | lea                 ecx, [ecx + esi + 0x48]
            //   6a01                 | push                1

        $sequence_5 = { 397b14 7311 8b4310 40 50 53 56 }
            // n = 7, score = 200
            //   397b14               | cmp                 dword ptr [ebx + 0x14], edi
            //   7311                 | jae                 0x13
            //   8b4310               | mov                 eax, dword ptr [ebx + 0x10]
            //   40                   | inc                 eax
            //   50                   | push                eax
            //   53                   | push                ebx
            //   56                   | push                esi

        $sequence_6 = { 57 e8???????? 89742424 8b4c2424 83c40c 33f6 81f900100000 }
            // n = 7, score = 200
            //   57                   | push                edi
            //   e8????????           |                     
            //   89742424             | mov                 dword ptr [esp + 0x24], esi
            //   8b4c2424             | mov                 ecx, dword ptr [esp + 0x24]
            //   83c40c               | add                 esp, 0xc
            //   33f6                 | xor                 esi, esi
            //   81f900100000         | cmp                 ecx, 0x1000

        $sequence_7 = { ff15???????? 8b4d10 8901 57 ff15???????? 8b7510 }
            // n = 6, score = 200
            //   ff15????????         |                     
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]
            //   8901                 | mov                 dword ptr [ecx], eax
            //   57                   | push                edi
            //   ff15????????         |                     
            //   8b7510               | mov                 esi, dword ptr [ebp + 0x10]

        $sequence_8 = { 68???????? 8d8e48100000 56 8901 8d4508 50 8b4620 }
            // n = 7, score = 200
            //   68????????           |                     
            //   8d8e48100000         | lea                 ecx, [esi + 0x1048]
            //   56                   | push                esi
            //   8901                 | mov                 dword ptr [ecx], eax
            //   8d4508               | lea                 eax, [ebp + 8]
            //   50                   | push                eax
            //   8b4620               | mov                 eax, dword ptr [esi + 0x20]

        $sequence_9 = { 755d 8b4c241c 8b542424 83ec10 8bc4 8908 8b4c2438 }
            // n = 7, score = 200
            //   755d                 | jne                 0x5f
            //   8b4c241c             | mov                 ecx, dword ptr [esp + 0x1c]
            //   8b542424             | mov                 edx, dword ptr [esp + 0x24]
            //   83ec10               | sub                 esp, 0x10
            //   8bc4                 | mov                 eax, esp
            //   8908                 | mov                 dword ptr [eax], ecx
            //   8b4c2438             | mov                 ecx, dword ptr [esp + 0x38]

    condition:
        7 of them and filesize < 507904
}
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