SYMBOLCOMMON_NAMEaka. SYNONYMS
win.chinotto (Back to overview)

Chinotto

Actor(s): APT37


There is no description at this point.

References
2021-11-29KasperskyGReAT
@online{great:20211129:scarcruft:986e7f4, author = {GReAT}, title = {{ScarCruft surveilling North Korean defectors and human rights activists}}, date = {2021-11-29}, organization = {Kaspersky}, url = {https://securelist.com/scarcruft-surveilling-north-korean-defectors-and-human-rights-activists/105074/}, language = {English}, urldate = {2021-12-07} } ScarCruft surveilling North Korean defectors and human rights activists
Chinotto Chinotto PoorWeb
Yara Rules
[TLP:WHITE] win_chinotto_auto (20221125 | Detects win.chinotto.)
rule win_chinotto_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.chinotto."
        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.chinotto"
        malpedia_rule_date = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { e9???????? 8d14ff c1e206 03f2 8b5508 33db 89b5ecf5ffff }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8d14ff               | lea                 edx, [edi + edi*8]
            //   c1e206               | shl                 edx, 6
            //   03f2                 | add                 esi, edx
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   33db                 | xor                 ebx, ebx
            //   89b5ecf5ffff         | mov                 dword ptr [ebp - 0xa14], esi

        $sequence_1 = { 57 8d8df0feffff 56 51 e8???????? 8b9580f8ffff 83c40c }
            // n = 7, score = 100
            //   57                   | push                edi
            //   8d8df0feffff         | lea                 ecx, [ebp - 0x110]
            //   56                   | push                esi
            //   51                   | push                ecx
            //   e8????????           |                     
            //   8b9580f8ffff         | mov                 edx, dword ptr [ebp - 0x780]
            //   83c40c               | add                 esp, 0xc

        $sequence_2 = { b986010000 8d7c2410 f3a5 b916000000 be???????? 8dbc2428060000 }
            // n = 6, score = 100
            //   b986010000           | mov                 ecx, 0x186
            //   8d7c2410             | lea                 edi, [esp + 0x10]
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   b916000000           | mov                 ecx, 0x16
            //   be????????           |                     
            //   8dbc2428060000       | lea                 edi, [esp + 0x628]

        $sequence_3 = { 8945fc 3d00800000 7207 c745fc00800000 8b45dc 294df0 8d1401 }
            // n = 7, score = 100
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   3d00800000           | cmp                 eax, 0x8000
            //   7207                 | jb                  9
            //   c745fc00800000       | mov                 dword ptr [ebp - 4], 0x8000
            //   8b45dc               | mov                 eax, dword ptr [ebp - 0x24]
            //   294df0               | sub                 dword ptr [ebp - 0x10], ecx
            //   8d1401               | lea                 edx, [ecx + eax]

        $sequence_4 = { 8d95ccf6ffff 52 50 ff15???????? 85c0 746e }
            // n = 6, score = 100
            //   8d95ccf6ffff         | lea                 edx, [ebp - 0x934]
            //   52                   | push                edx
            //   50                   | push                eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   746e                 | je                  0x70

        $sequence_5 = { 8d540a01 8bc7 c1e80e 83e001 8bcf c1f902 81e1ff030000 }
            // n = 7, score = 100
            //   8d540a01             | lea                 edx, [edx + ecx + 1]
            //   8bc7                 | mov                 eax, edi
            //   c1e80e               | shr                 eax, 0xe
            //   83e001               | and                 eax, 1
            //   8bcf                 | mov                 ecx, edi
            //   c1f902               | sar                 ecx, 2
            //   81e1ff030000         | and                 ecx, 0x3ff

        $sequence_6 = { b96f000000 66894dc8 b96d000000 66894dca 66894dcc 8b4508 b961000000 }
            // n = 7, score = 100
            //   b96f000000           | mov                 ecx, 0x6f
            //   66894dc8             | mov                 word ptr [ebp - 0x38], cx
            //   b96d000000           | mov                 ecx, 0x6d
            //   66894dca             | mov                 word ptr [ebp - 0x36], cx
            //   66894dcc             | mov                 word ptr [ebp - 0x34], cx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   b961000000           | mov                 ecx, 0x61

        $sequence_7 = { 2bd0 52 e8???????? 83c404 894618 85db }
            // n = 6, score = 100
            //   2bd0                 | sub                 edx, eax
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   894618               | mov                 dword ptr [esi + 0x18], eax
            //   85db                 | test                ebx, ebx

        $sequence_8 = { f7d8 83da00 5f 5b c21000 6a00 6800100000 }
            // n = 7, score = 100
            //   f7d8                 | neg                 eax
            //   83da00               | sbb                 edx, 0
            //   5f                   | pop                 edi
            //   5b                   | pop                 ebx
            //   c21000               | ret                 0x10
            //   6a00                 | push                0
            //   6800100000           | push                0x1000

        $sequence_9 = { 897708 8b470c 8bd0 0fafc1 0faf55fc 0307 52 }
            // n = 7, score = 100
            //   897708               | mov                 dword ptr [edi + 8], esi
            //   8b470c               | mov                 eax, dword ptr [edi + 0xc]
            //   8bd0                 | mov                 edx, eax
            //   0fafc1               | imul                eax, ecx
            //   0faf55fc             | imul                edx, dword ptr [ebp - 4]
            //   0307                 | add                 eax, dword ptr [edi]
            //   52                   | push                edx

    condition:
        7 of them and filesize < 300032
}
Download all Yara Rules