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 (20210616 | Detects win.remy.)
rule win_remy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 89442418 8944241c 89442430 8b4508 8b5724 50 51 }
            // n = 7, score = 200
            //   89442418             | mov                 dword ptr [esp + 0x18], eax
            //   8944241c             | mov                 dword ptr [esp + 0x1c], eax
            //   89442430             | mov                 dword ptr [esp + 0x30], eax
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8b5724               | mov                 edx, dword ptr [edi + 0x24]
            //   50                   | push                eax
            //   51                   | push                ecx

        $sequence_1 = { 8d8d5cdfffff 51 6a01 8d55dc 52 50 ff15???????? }
            // n = 7, score = 200
            //   8d8d5cdfffff         | lea                 ecx, dword ptr [ebp - 0x20a4]
            //   51                   | push                ecx
            //   6a01                 | push                1
            //   8d55dc               | lea                 edx, dword ptr [ebp - 0x24]
            //   52                   | push                edx
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_2 = { 8955d8 c745dc5c354300 e9???????? c745dc58354300 ebce 8955d8 c745dc58354300 }
            // n = 7, score = 200
            //   8955d8               | mov                 dword ptr [ebp - 0x28], edx
            //   c745dc5c354300       | mov                 dword ptr [ebp - 0x24], 0x43355c
            //   e9????????           |                     
            //   c745dc58354300       | mov                 dword ptr [ebp - 0x24], 0x433558
            //   ebce                 | jmp                 0xffffffd0
            //   8955d8               | mov                 dword ptr [ebp - 0x28], edx
            //   c745dc58354300       | mov                 dword ptr [ebp - 0x24], 0x433558

        $sequence_3 = { 6a01 8bf9 6a02 897c243c 895c2450 89442454 ff15???????? }
            // n = 7, score = 200
            //   6a01                 | push                1
            //   8bf9                 | mov                 edi, ecx
            //   6a02                 | push                2
            //   897c243c             | mov                 dword ptr [esp + 0x3c], edi
            //   895c2450             | mov                 dword ptr [esp + 0x50], ebx
            //   89442454             | mov                 dword ptr [esp + 0x54], eax
            //   ff15????????         |                     

        $sequence_4 = { 51 e8???????? 83c404 e9???????? 66c745c00501 885dc2 be03000000 }
            // n = 7, score = 200
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   e9????????           |                     
            //   66c745c00501         | mov                 word ptr [ebp - 0x40], 0x105
            //   885dc2               | mov                 byte ptr [ebp - 0x3e], bl
            //   be03000000           | mov                 esi, 3

        $sequence_5 = { 8d75b4 894740 e8???????? eb09 43 e9???????? 8b7db0 }
            // n = 7, score = 200
            //   8d75b4               | lea                 esi, dword ptr [ebp - 0x4c]
            //   894740               | mov                 dword ptr [edi + 0x40], eax
            //   e8????????           |                     
            //   eb09                 | jmp                 0xb
            //   43                   | inc                 ebx
            //   e9????????           |                     
            //   8b7db0               | mov                 edi, dword ptr [ebp - 0x50]

        $sequence_6 = { 8945e0 85c0 0f852bffffff 6a08 8945e0 e8???????? 83c404 }
            // n = 7, score = 200
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   85c0                 | test                eax, eax
            //   0f852bffffff         | jne                 0xffffff31
            //   6a08                 | push                8
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

        $sequence_7 = { 64a300000000 8b450c 33f6 8d4c2413 8944241c 51 b800040000 }
            // n = 7, score = 200
            //   64a300000000         | mov                 dword ptr fs:[0], eax
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   33f6                 | xor                 esi, esi
            //   8d4c2413             | lea                 ecx, dword ptr [esp + 0x13]
            //   8944241c             | mov                 dword ptr [esp + 0x1c], eax
            //   51                   | push                ecx
            //   b800040000           | mov                 eax, 0x400

        $sequence_8 = { c745f8473f4800 c745c427001e00 c745c82d001a00 c745cc29002200 c745d00c000b00 66894dd4 }
            // n = 6, score = 200
            //   c745f8473f4800       | mov                 dword ptr [ebp - 8], 0x483f47
            //   c745c427001e00       | mov                 dword ptr [ebp - 0x3c], 0x1e0027
            //   c745c82d001a00       | mov                 dword ptr [ebp - 0x38], 0x1a002d
            //   c745cc29002200       | mov                 dword ptr [ebp - 0x34], 0x220029
            //   c745d00c000b00       | mov                 dword ptr [ebp - 0x30], 0xb000c
            //   66894dd4             | mov                 word ptr [ebp - 0x2c], cx

        $sequence_9 = { c6458c00 8d7101 8d4900 8a11 41 84d2 75f9 }
            // n = 7, score = 200
            //   c6458c00             | mov                 byte ptr [ebp - 0x74], 0
            //   8d7101               | lea                 esi, dword ptr [ecx + 1]
            //   8d4900               | lea                 ecx, dword ptr [ecx]
            //   8a11                 | mov                 dl, byte ptr [ecx]
            //   41                   | inc                 ecx
            //   84d2                 | test                dl, dl
            //   75f9                 | jne                 0xfffffffb

    condition:
        7 of them and filesize < 507904
}
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