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 (20221125 | Detects win.remy.)
rule win_remy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.remy."
        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.remy"
        malpedia_rule_date = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 83ec10 8bc4 8908 8b4dac 895004 8b55b0 }
            // n = 6, score = 200
            //   83ec10               | sub                 esp, 0x10
            //   8bc4                 | mov                 eax, esp
            //   8908                 | mov                 dword ptr [eax], ecx
            //   8b4dac               | mov                 ecx, dword ptr [ebp - 0x54]
            //   895004               | mov                 dword ptr [eax + 4], edx
            //   8b55b0               | mov                 edx, dword ptr [ebp - 0x50]

        $sequence_1 = { 8b08 8b11 50 8b4204 ffd0 c684243003000003 8b442418 }
            // n = 7, score = 200
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   8b11                 | mov                 edx, dword ptr [ecx]
            //   50                   | push                eax
            //   8b4204               | mov                 eax, dword ptr [edx + 4]
            //   ffd0                 | call                eax
            //   c684243003000003     | mov                 byte ptr [esp + 0x330], 3
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]

        $sequence_2 = { 0fb6901bef4200 6683bc967e0a000000 7538 0fb6881aef4200 6683bc8e7e0a000000 7533 }
            // n = 6, score = 200
            //   0fb6901bef4200       | movzx               edx, byte ptr [eax + 0x42ef1b]
            //   6683bc967e0a000000     | cmp    word ptr [esi + edx*4 + 0xa7e], 0
            //   7538                 | jne                 0x3a
            //   0fb6881aef4200       | movzx               ecx, byte ptr [eax + 0x42ef1a]
            //   6683bc8e7e0a000000     | cmp    word ptr [esi + ecx*4 + 0xa7e], 0
            //   7533                 | jne                 0x35

        $sequence_3 = { b800100000 81ff00100000 7f02 8bc7 53 50 8b442418 }
            // n = 7, score = 200
            //   b800100000           | mov                 eax, 0x1000
            //   81ff00100000         | cmp                 edi, 0x1000
            //   7f02                 | jg                  4
            //   8bc7                 | mov                 eax, edi
            //   53                   | push                ebx
            //   50                   | push                eax
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]

        $sequence_4 = { 3bc3 7409 50 e8???????? 83c404 33c0 8b4c2468 }
            // n = 7, score = 200
            //   3bc3                 | cmp                 eax, ebx
            //   7409                 | je                  0xb
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   33c0                 | xor                 eax, eax
            //   8b4c2468             | mov                 ecx, dword ptr [esp + 0x68]

        $sequence_5 = { e8???????? 8d7728 e8???????? 8b8f90000000 2b8f8c000000 b893244992 f7e9 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8d7728               | lea                 esi, [edi + 0x28]
            //   e8????????           |                     
            //   8b8f90000000         | mov                 ecx, dword ptr [edi + 0x90]
            //   2b8f8c000000         | sub                 ecx, dword ptr [edi + 0x8c]
            //   b893244992           | mov                 eax, 0x92492493
            //   f7e9                 | imul                ecx

        $sequence_6 = { a1???????? 33c5 8945fc 53 56 33f6 8d45f0 }
            // n = 7, score = 200
            //   a1????????           |                     
            //   33c5                 | xor                 eax, ebp
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   53                   | push                ebx
            //   56                   | push                esi
            //   33f6                 | xor                 esi, esi
            //   8d45f0               | lea                 eax, [ebp - 0x10]

        $sequence_7 = { 8b8d68dfffff 898d80dfffff 899d58dfffff 899d64dfffff 68???????? 8d956cdfffff 52 }
            // n = 7, score = 200
            //   8b8d68dfffff         | mov                 ecx, dword ptr [ebp - 0x2098]
            //   898d80dfffff         | mov                 dword ptr [ebp - 0x2080], ecx
            //   899d58dfffff         | mov                 dword ptr [ebp - 0x20a8], ebx
            //   899d64dfffff         | mov                 dword ptr [ebp - 0x209c], ebx
            //   68????????           |                     
            //   8d956cdfffff         | lea                 edx, [ebp - 0x2094]
            //   52                   | push                edx

        $sequence_8 = { e8???????? eb09 43 e9???????? }
            // n = 4, score = 200
            //   e8????????           |                     
            //   eb09                 | jmp                 0xb
            //   43                   | inc                 ebx
            //   e9????????           |                     

        $sequence_9 = { 50 8bce e8???????? 8d4c2404 3bf1 741d 8b06 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   8d4c2404             | lea                 ecx, [esp + 4]
            //   3bf1                 | cmp                 esi, ecx
            //   741d                 | je                  0x1f
            //   8b06                 | mov                 eax, dword ptr [esi]

    condition:
        7 of them and filesize < 507904
}
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