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 (20220808 | Detects win.remy.)
rule win_remy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        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 = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { 33c5 8945fc 53 56 57 33c0 8985a8feffff }
            // n = 7, score = 200
            //   33c5                 | xor                 eax, ebp
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   33c0                 | xor                 eax, eax
            //   8985a8feffff         | mov                 dword ptr [ebp - 0x158], eax

        $sequence_1 = { 8d842480010000 800027 40 803800 75f7 8b4c2454 8b442450 }
            // n = 7, score = 200
            //   8d842480010000       | lea                 eax, [esp + 0x180]
            //   800027               | add                 byte ptr [eax], 0x27
            //   40                   | inc                 eax
            //   803800               | cmp                 byte ptr [eax], 0
            //   75f7                 | jne                 0xfffffff9
            //   8b4c2454             | mov                 ecx, dword ptr [esp + 0x54]
            //   8b442450             | mov                 eax, dword ptr [esp + 0x50]

        $sequence_2 = { c7442430ffffffff 3bc6 7422 3bdf 7409 53 e8???????? }
            // n = 7, score = 200
            //   c7442430ffffffff     | mov                 dword ptr [esp + 0x30], 0xffffffff
            //   3bc6                 | cmp                 eax, esi
            //   7422                 | je                  0x24
            //   3bdf                 | cmp                 ebx, edi
            //   7409                 | je                  0xb
            //   53                   | push                ebx
            //   e8????????           |                     

        $sequence_3 = { 742a 8b30 8b11 8931 8910 8b7004 8b5104 }
            // n = 7, score = 200
            //   742a                 | je                  0x2c
            //   8b30                 | mov                 esi, dword ptr [eax]
            //   8b11                 | mov                 edx, dword ptr [ecx]
            //   8931                 | mov                 dword ptr [ecx], esi
            //   8910                 | mov                 dword ptr [eax], edx
            //   8b7004               | mov                 esi, dword ptr [eax + 4]
            //   8b5104               | mov                 edx, dword ptr [ecx + 4]

        $sequence_4 = { 8d8508ffffff 66830027 83c002 66833800 75f3 8d45e0 }
            // n = 6, score = 200
            //   8d8508ffffff         | lea                 eax, [ebp - 0xf8]
            //   66830027             | add                 word ptr [eax], 0x27
            //   83c002               | add                 eax, 2
            //   66833800             | cmp                 word ptr [eax], 0
            //   75f3                 | jne                 0xfffffff5
            //   8d45e0               | lea                 eax, [ebp - 0x20]

        $sequence_5 = { 56 6a05 ff15???????? 3d040000c0 0f8550010000 8b45e8 3bc6 }
            // n = 7, score = 200
            //   56                   | push                esi
            //   6a05                 | push                5
            //   ff15????????         |                     
            //   3d040000c0           | cmp                 eax, 0xc0000004
            //   0f8550010000         | jne                 0x156
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   3bc6                 | cmp                 eax, esi

        $sequence_6 = { 40 3818 75f8 b14c 884de0 8855e1 c745e23c444c00 }
            // n = 7, score = 200
            //   40                   | inc                 eax
            //   3818                 | cmp                 byte ptr [eax], bl
            //   75f8                 | jne                 0xfffffffa
            //   b14c                 | mov                 cl, 0x4c
            //   884de0               | mov                 byte ptr [ebp - 0x20], cl
            //   8855e1               | mov                 byte ptr [ebp - 0x1f], dl
            //   c745e23c444c00       | mov                 dword ptr [ebp - 0x1e], 0x4c443c

        $sequence_7 = { 895e10 881e 3bf0 7458 837e1410 720b 8b06 }
            // n = 7, score = 200
            //   895e10               | mov                 dword ptr [esi + 0x10], ebx
            //   881e                 | mov                 byte ptr [esi], bl
            //   3bf0                 | cmp                 esi, eax
            //   7458                 | je                  0x5a
            //   837e1410             | cmp                 dword ptr [esi + 0x14], 0x10
            //   720b                 | jb                  0xd
            //   8b06                 | mov                 eax, dword ptr [esi]

        $sequence_8 = { 83c404 c645fc02 8b45e8 83c0f0 8d500c 83c9ff f00fc10a }
            // n = 7, score = 200
            //   83c404               | add                 esp, 4
            //   c645fc02             | mov                 byte ptr [ebp - 4], 2
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   83c0f0               | add                 eax, -0x10
            //   8d500c               | lea                 edx, [eax + 0xc]
            //   83c9ff               | or                  ecx, 0xffffffff
            //   f00fc10a             | lock xadd           dword ptr [edx], ecx

        $sequence_9 = { 8b08 8b45b0 50 8b45d0 51 }
            // n = 5, score = 200
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   8b45b0               | mov                 eax, dword ptr [ebp - 0x50]
            //   50                   | push                eax
            //   8b45d0               | mov                 eax, dword ptr [ebp - 0x30]
            //   51                   | push                ecx

    condition:
        7 of them and filesize < 507904
}
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