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 (20201014 | autogenerated rule brought to you by yara-signator)
rule win_retro_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.retro"
        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 = { 4d8da800090000 85c0 7807 3d01010000 7c19 488d1524100300 488d0d35120300 }
            // n = 7, score = 200
            //   4d8da800090000       | inc                 edi
            //   85c0                 | dec                 eax
            //   7807                 | add                 esi, 8
            //   3d01010000           | dec                 eax
            //   7c19                 | add                 ebx, 4
            //   488d1524100300       | inc                 ecx
            //   488d0d35120300       | cmp                 edi, dword ptr [ebp + 0x8ac]

        $sequence_1 = { 743e 4585c9 48894c2460 7554 f20f59442460 660f56442470 660f6fbc24c0000000 }
            // n = 7, score = 200
            //   743e                 | dec                 eax
            //   4585c9               | mov                 eax, 0xffffffff
            //   48894c2460           | mov                 edi, eax
            //   7554                 | dec                 eax
            //   f20f59442460         | mov                 dword ptr [esp + 0x58], ecx
            //   660f56442470         | dec                 eax
            //   660f6fbc24c0000000     | arpl    word ptr [esp + 0xf0], bx

        $sequence_2 = { 498d948044040000 498d0c80 4d8bc2 e8???????? 4963c5 488d1556970400 48c1e002 }
            // n = 7, score = 200
            //   498d948044040000     | shl                 ecx, 8
            //   498d0c80             | or                  ecx, eax
            //   4d8bc2               | inc                 ecx
            //   e8????????           |                     
            //   4963c5               | movzx               eax, byte ptr [eax + 3]
            //   488d1556970400       | shl                 ecx, 8
            //   48c1e002             | or                  ecx, eax

        $sequence_3 = { 413b94b648180000 410f4ed7 8914cf 4183bcb64818000003 7410 8b44cf0c 0344cf08 }
            // n = 7, score = 200
            //   413b94b648180000     | inc                 ecx
            //   410f4ed7             | cmp                 esi, 8
            //   8914cf               | mov                 dword ptr [esi + 0x40], 0x120
            //   4183bcb64818000003     | cmove    eax, ecx
            //   7410                 | jmp                 0x1993
            //   8b44cf0c             | mov                 esi, 2
            //   0344cf08             | inc                 ebp

        $sequence_4 = { ba00000040 488d4c2460 ff15???????? 4889842478010000 4883bc2478010000ff 7507 33c0 }
            // n = 7, score = 200
            //   ba00000040           | lea                 edx, [esp + 0x40]
            //   488d4c2460           | dec                 eax
            //   ff15????????         |                     
            //   4889842478010000     | lea                 edx, [0x2ea9c]
            //   4883bc2478010000ff     | dec    eax
            //   7507                 | lea                 ecx, [0x2ea75]
            //   33c0                 | xor                 ebx, ebx

        $sequence_5 = { 488bc2 48c1ea0a 490fafca 4803ca 4b8b54c1c8 4923c7 4889442478 }
            // n = 7, score = 200
            //   488bc2               | mov                 esp, ebp
            //   48c1ea0a             | movaps              xmmword ptr [esp + 0x1070], xmm6
            //   490fafca             | movaps              xmmword ptr [esp + 0x1060], xmm7
            //   4803ca               | inc                 esp
            //   4b8b54c1c8           | movaps              xmmword ptr [esp + 0x1050], xmm0
            //   4923c7               | dec                 esp
            //   4889442478           | sub                 ecx, ecx

        $sequence_6 = { 48c70300000000 418bc6 44896b08 e9???????? 458b30 4489742460 }
            // n = 6, score = 200
            //   48c70300000000       | dec                 edx
            //   418bc6               | lea                 eax, [ecx + ecx]
            //   44896b08             | dec                 ecx
            //   e9????????           |                     
            //   458b30               | lea                 edx, [edi + eax*4 + 0x900]
            //   4489742460           | je                  0x1239

        $sequence_7 = { 4889442420 4533c9 4533c0 ba0c800000 488b4c2440 ff15???????? 85c0 }
            // n = 7, score = 200
            //   4889442420           | movss               dword ptr [esi - 4], xmm0
            //   4533c9               | addss               xmm6, xmm0
            //   4533c0               | inc                 ecx
            //   ba0c800000           | cmp                 ebx, edi
            //   488b4c2440           | jle                 0x12ce
            //   ff15????????         |                     
            //   85c0                 | inc                 ebx

        $sequence_8 = { ffca ebab 8b442420 4863c8 ba04000000 e8???????? 4c8bb42478400000 }
            // n = 7, score = 200
            //   ffca                 | add                 esi, edi
            //   ebab                 | mov                 ebx, dword ptr [eax]
            //   8b442420             | mov                 esi, dword ptr [eax - 4]
            //   4863c8               | inc                 ecx
            //   ba04000000           | mov                 esp, 3
            //   e8????????           |                     
            //   4c8bb42478400000     | inc                 esp

        $sequence_9 = { f30f114f08 f30f104308 0f2f4708 768e ba01000000 eb89 f30f104304 }
            // n = 7, score = 200
            //   f30f114f08           | jne                 0x9f7
            //   f30f104308           | movd                xmm0, dword ptr [esi + 8]
            //   0f2f4708             | dec                 eax
            //   768e                 | arpl                word ptr [esp + 0x28], ax
            //   ba01000000           | je                  0x9e6
            //   eb89                 | nop                 word ptr [eax + eax]
            //   f30f104304           | movzx               eax, byte ptr [edx]

    condition:
        7 of them and filesize < 1409024
}
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