play

Tácticas y técnicas observadas del actor, mapeadas a MITRE ATT&CK (clic para ver la ficha oficial). Útil para priorizar detecciones.

Firma de detección defensiva para este grupo (úsala en tu EDR/SIEM). Fuente: ransomware.live.

rule win_play_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.play."
        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.play"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 8b5d08 8d9328442324 8955e8 8d834f86c861 8d9377caeb85 8955ec 8d5103 }
            // n = 7, score = 100
            //   8b5d08               | mov                 ebx, dword ptr [ebp + 8]
            //   8d9328442324         | lea                 edx, [ebx + 0x24234428]
            //   8955e8               | mov                 dword ptr [ebp - 0x18], edx
            //   8d834f86c861         | lea                 eax, [ebx + 0x61c8864f]
            //   8d9377caeb85         | lea                 edx, [ebx - 0x7a143589]
            //   8955ec               | mov                 dword ptr [ebp - 0x14], edx
            //   8d5103               | lea                 edx, [ecx + 3]

        $sequence_1 = { 51 8d147f c1e202 e8???????? 83c408 a3???????? }
            // n = 6, score = 100
            //   51                   | push                ecx
            //   8d147f               | lea                 edx, [edi + edi*2]
            //   c1e202               | shl                 edx, 2
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   a3????????           |                     

        $sequence_2 = { 8d85b1feffff 03c1 50 8d85a8fdffff 6804010000 50 e8???????? }
            // n = 7, score = 100
            //   8d85b1feffff         | lea                 eax, [ebp - 0x14f]
            //   03c1                 | add                 eax, ecx
            //   50                   | push                eax
            //   8d85a8fdffff         | lea                 eax, [ebp - 0x258]
            //   6804010000           | push                0x104
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_3 = { 8a852afeffff 04f6 8885d2feffff 88852afeffff 8d45c8 50 ff35???????? }
            // n = 7, score = 100
            //   8a852afeffff         | mov                 al, byte ptr [ebp - 0x1d6]
            //   04f6                 | add                 al, 0xf6
            //   8885d2feffff         | mov                 byte ptr [ebp - 0x12e], al
            //   88852afeffff         | mov                 byte ptr [ebp - 0x1d6], al
            //   8d45c8               | lea                 eax, [ebp - 0x38]
            //   50                   | push                eax
            //   ff35????????         |                     

        $sequence_4 = { 899dbcfeffff 83d600 8995b0feffff 89b568feffff 888d82feffff 85d2 7514 }
            // n = 7, score = 100
            //   899dbcfeffff         | mov                 dword ptr [ebp - 0x144], ebx
            //   83d600               | adc                 esi, 0
            //   8995b0feffff         | mov                 dword ptr [ebp - 0x150], edx
            //   89b568feffff         | mov                 dword ptr [ebp - 0x198], esi
            //   888d82feffff         | mov                 byte ptr [ebp - 0x17e], cl
            //   85d2                 | test                edx, edx
            //   7514                 | jne                 0x16

        $sequence_5 = { c78580fdffff2d51be07 c78584fdffff2f3de01e c78588fdffff760ba609 c7858cfdffff6b188d10 c78590fdffff8739684e c78594fdffff88540000 0f118550fcffff }
            // n = 7, score = 100
            //   c78580fdffff2d51be07     | mov    dword ptr [ebp - 0x280], 0x7be512d
            //   c78584fdffff2f3de01e     | mov    dword ptr [ebp - 0x27c], 0x1ee03d2f
            //   c78588fdffff760ba609     | mov    dword ptr [ebp - 0x278], 0x9a60b76
            //   c7858cfdffff6b188d10     | mov    dword ptr [ebp - 0x274], 0x108d186b
            //   c78590fdffff8739684e     | mov    dword ptr [ebp - 0x270], 0x4e683987
            //   c78594fdffff88540000     | mov    dword ptr [ebp - 0x26c], 0x5488
            //   0f118550fcffff       | movups              xmmword ptr [ebp - 0x3b0], xmm0

        $sequence_6 = { 40 6603f2 83f810 7cf0 0fb7c6 ba10000000 }
            // n = 6, score = 100
            //   40                   | inc                 eax
            //   6603f2               | add                 si, dx
            //   83f810               | cmp                 eax, 0x10
            //   7cf0                 | jl                  0xfffffff2
            //   0fb7c6               | movzx               eax, si
            //   ba10000000           | mov                 edx, 0x10

        $sequence_7 = { 6809ed1c23 b6b7 92 e2a8 fc f622 94 }
            // n = 7, score = 100
            //   6809ed1c23           | push                0x231ced09
            //   b6b7                 | mov                 dh, 0xb7
            //   92                   | xchg                eax, edx
            //   e2a8                 | loop                0xffffffaa
            //   fc                   | cld                 
            //   f622                 | mul                 byte ptr [edx]
            //   94                   | xchg                eax, esp

        $sequence_8 = { 660fd645e0 b9???????? e8???????? 83c408 8d55d0 8bcf e8???????? }
            // n = 7, score = 100
            //   660fd645e0           | movq                qword ptr [ebp - 0x20], xmm0
            //   b9????????           |                     
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8d55d0               | lea                 edx, [ebp - 0x30]
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     

        $sequence_9 = { 8b45b0 895db8 c745d801000000 8b048580d24200 8945d0 81f9e9fd0000 0f852d010000 }
            // n = 7, score = 100
            //   8b45b0               | mov                 eax, dword ptr [ebp - 0x50]
            //   895db8               | mov                 dword ptr [ebp - 0x48], ebx
            //   c745d801000000       | mov                 dword ptr [ebp - 0x28], 1
            //   8b048580d24200       | mov                 eax, dword ptr [eax*4 + 0x42d280]
            //   8945d0               | mov                 dword ptr [ebp - 0x30], eax
            //   81f9e9fd0000         | cmp                 ecx, 0xfde9
            //   0f852d010000         | jne                 0x133

    condition:
        7 of them and filesize < 389120
}

PLAY
news portal, tor network links:
[redactado]
[redactado]
[redactado]

• https://www.ransomware.live/group/play
• https://chuongdong.com/reverse%20engineering/2022/09/03/PLAYRansomware/
• https://www.trendmicro.com/en_us/research/22/i/play-ransomware-s-attack-playbook-unmasks-it-as-another-hive-aff.html
• https://www.sentinelone.com/labs/crimeware-trends-ransomware-developers-turn-to-intermittent-encryption-to-evade-detection/

• Not Found
  3
• Business Services
  2
• Consumer Services
  2
• Manufacturing
  2