SYMBOLCOMMON_NAMEaka. SYNONYMS
win.retro (Back to overview)

Retro

Actor(s): DarkHotel


There is no description at this point.

References
2020-06-14BushidoTokenBushidoToken
@online{bushidotoken:20200614:deepdive:3a375ca, author = {BushidoToken}, title = {{Deep-dive: The DarkHotel APT}}, date = {2020-06-14}, organization = {BushidoToken}, url = {https://blog.bushidotoken.net/2020/06/deep-dive-darkhotel-apt.html}, language = {English}, urldate = {2020-06-16} } Deep-dive: The DarkHotel APT
Asruex Ghost RAT Ramsay Retro Unidentified 076 (Higaisa LNK to Shellcode)
2020-05-13ESET ResearchIgnacio Sanmillan
@online{sanmillan:20200513:ramsay:8608f19, author = {Ignacio Sanmillan}, title = {{Ramsay: A cyber‑espionage toolkit tailored for air‑gapped networks}}, date = {2020-05-13}, organization = {ESET Research}, url = {https://www.welivesecurity.com/2020/05/13/ramsay-cyberespionage-toolkit-airgapped-networks/}, language = {English}, urldate = {2020-05-14} } Ramsay: A cyber‑espionage toolkit tailored for air‑gapped networks
Ramsay Retro
2018-05-25360360 Helios Team
@online{team:20180525:analysis:a83bb88, author = {360 Helios Team}, title = {{Analysis of CVE-2018-8174 VBScript 0day and APT actor related to Office targeted attack}}, date = {2018-05-25}, organization = {360}, url = {https://blog.360totalsecurity.com/en/analysis-cve-2018-8174-vbscript-0day-apt-actor-related-office-targeted-attack/}, language = {English}, urldate = {2020-05-14} } Analysis of CVE-2018-8174 VBScript 0day and APT actor related to Office targeted attack
Retro
Yara Rules
[TLP:WHITE] win_retro_auto (20201023 | autogenerated rule brought to you by yara-signator)
rule win_retro_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.retro"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { c1e108 0bc8 4983c004 41894910 f6c204 7441 498d4918 }
            // n = 7, score = 200
            //   c1e108               | mov                 eax, 0x2b0
            //   0bc8                 | inc                 ecx
            //   4983c004             | comiss              xmm7, xmm0
            //   41894910             | inc                 esp
            //   f6c204               | movaps              xmm0, xmmword ptr [esp + 0x40]
            //   7441                 | jbe                 0xefb
            //   498d4918             | dec                 eax

        $sequence_1 = { 48ffc0 4883f804 7c48 4d8d4afd 0fb6040a 4883c104 f3410f588483d8040000 }
            // n = 7, score = 200
            //   48ffc0               | inc                 ecx
            //   4883f804             | shl                 eax, 8
            //   7c48                 | inc                 esp
            //   4d8d4afd             | or                  eax, eax
            //   0fb6040a             | inc                 ecx
            //   4883c104             | movzx               eax, byte ptr [ecx + 2]
            //   f3410f588483d8040000     | inc    ecx

        $sequence_2 = { 7422 488d15c94c0200 488d0dfad70100 41b875000000 e8???????? 4c8d1d2c8d0400 eb4c }
            // n = 7, score = 200
            //   7422                 | cmp                 eax, 0x5a
            //   488d15c94c0200       | jg                  0x157
            //   488d0dfad70100       | dec                 eax
            //   41b875000000         | arpl                word ptr [esp + 0x1b0], ax
            //   e8????????           |                     
            //   4c8d1d2c8d0400       | dec                 eax
            //   eb4c                 | mov                 ecx, dword ptr [esp + 0x1c8]

        $sequence_3 = { f30f2cc0 8901 eb03 448911 4883c104 49ffc8 }
            // n = 6, score = 200
            //   f30f2cc0             | dec                 eax
            //   8901                 | add                 ecx, 8
            //   eb03                 | inc                 edx
            //   448911               | mov                 dword ptr [ecx + esi + 0x789f8], eax
            //   4883c104             | jle                 0x2b
            //   49ffc8               | mov                 ecx, edi

        $sequence_4 = { 498bf8 488bda 83f908 0f87f9030000 488d15c0dbfdff 4863c1 8b8c82cc280200 }
            // n = 7, score = 200
            //   498bf8               | inc                 ebp
            //   488bda               | mov                 eax, edi
            //   83f908               | dec                 eax
            //   0f87f9030000         | lea                 edx, [0x4d21d]
            //   488d15c0dbfdff       | inc                 ecx
            //   4863c1               | cmp                 ebx, 1
            //   8b8c82cc280200       | je                  0x7ce

        $sequence_5 = { f30f118278ebffff f30f115208 f30f109280ebffff 0f28c1 f30f58c3 f30f5cd9 f30f104a10 }
            // n = 7, score = 200
            //   f30f118278ebffff     | mov                 eax, ebx
            //   f30f115208           | inc                 ecx
            //   f30f109280ebffff     | mov                 edx, 0xa6
            //   0f28c1               | dec                 eax
            //   f30f58c3             | add                 ecx, 4
            //   f30f5cd9             | nop                 word ptr [eax + eax]
            //   f30f104a10           | movd                xmm0, dword ptr [ecx - 4]

        $sequence_6 = { 4c3b65a8 7d0d 488b7c2440 418bf6 e9???????? 0f28bc2430260000 0f28b42440260000 }
            // n = 7, score = 200
            //   4c3b65a8             | movzx               eax, byte ptr [edx]
            //   7d0d                 | inc                 esp
            //   488b7c2440           | mov                 dword ptr [ebp + eax*4 - 0x29], edx
            //   418bf6               | inc                 ecx
            //   e9????????           |                     
            //   0f28bc2430260000     | shl                 al, cl
            //   0f28b42440260000     | inc                 ecx

        $sequence_7 = { f30f58d0 f3410f10440ae0 f30f5949e4 f30f5941e8 f30f58d1 f3410f104c0be0 f30f5949ec }
            // n = 7, score = 200
            //   f30f58d0             | movups              xmmword ptr [ebx + eax - 0x904], xmm0
            //   f3410f10440ae0       | inc                 ecx
            //   f30f5949e4           | movaps              xmm1, xmm1
            //   f30f5941e8           | inc                 ecx
            //   f30f58d1             | cmp                 dword ptr [ebx], esi
            //   f3410f104c0be0       | je                  0xeeb
            //   f30f5949ec           | inc                 cx

        $sequence_8 = { 4c8d5b4a 41b903000000 8901 0fbf4bfe 45897a90 49c7429403000000 8bc1 }
            // n = 7, score = 200
            //   4c8d5b4a             | inc                 ecx
            //   41b903000000         | cmovne              eax, edi
            //   8901                 | mov                 dword ptr [edi + ecx*8 + 0xc], eax
            //   0fbf4bfe             | jmp                 0xb45
            //   45897a90             | inc                 esp
            //   49c7429403000000     | cmp                 dword ptr [edi + 0x4c], ecx
            //   8bc1                 | jle                 0xb82

        $sequence_9 = { 418b8600130000 498daec8120000 0f95c1 4d8be0 41b807000000 ffc1 }
            // n = 6, score = 200
            //   418b8600130000       | inc                 ecx
            //   498daec8120000       | mov                 eax, dword ptr [eax]
            //   0f95c1               | inc                 ecx
            //   4d8be0               | movups              xmmword ptr [eax + 0x7c], xmm3
            //   41b807000000         | movaps              xmm2, xmm3
            //   ffc1                 | addss               xmm2, xmm0

    condition:
        7 of them and filesize < 1409024
}
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