SYMBOLCOMMON_NAMEaka. SYNONYMS
win.credraptor (Back to overview)

Credraptor

Actor(s): TeleBots


There is no description at this point.

References
2016-12-13ESET ResearchAnton Cherepanov
@online{cherepanov:20161213:rise:d6ee3c1, author = {Anton Cherepanov}, title = {{The rise of TeleBots: Analyzing disruptive KillDisk attacks}}, date = {2016-12-13}, organization = {ESET Research}, url = {http://www.welivesecurity.com/2016/12/13/rise-telebots-analyzing-disruptive-killdisk-attacks/}, language = {English}, urldate = {2019-12-20} } The rise of TeleBots: Analyzing disruptive KillDisk attacks
Credraptor KillDisk TeleBot TeleBots
Yara Rules
[TLP:WHITE] win_credraptor_auto (20210616 | Detects win.credraptor.)
rule win_credraptor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.credraptor."
        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.credraptor"
        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 = { 8a4310 3c06 7439 84c0 7435 3c02 721f }
            // n = 7, score = 100
            //   8a4310               | mov                 al, byte ptr [ebx + 0x10]
            //   3c06                 | cmp                 al, 6
            //   7439                 | je                  0x3b
            //   84c0                 | test                al, al
            //   7435                 | je                  0x37
            //   3c02                 | cmp                 al, 2
            //   721f                 | jb                  0x21

        $sequence_1 = { e9???????? 8b4bf4 8b53c4 51 8b4b94 52 51 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8b4bf4               | mov                 ecx, dword ptr [ebx - 0xc]
            //   8b53c4               | mov                 edx, dword ptr [ebx - 0x3c]
            //   51                   | push                ecx
            //   8b4b94               | mov                 ecx, dword ptr [ebx - 0x6c]
            //   52                   | push                edx
            //   51                   | push                ecx

        $sequence_2 = { 8b32 85ff 7516 53 56 e8???????? 8b45c0 }
            // n = 7, score = 100
            //   8b32                 | mov                 esi, dword ptr [edx]
            //   85ff                 | test                edi, edi
            //   7516                 | jne                 0x18
            //   53                   | push                ebx
            //   56                   | push                esi
            //   e8????????           |                     
            //   8b45c0               | mov                 eax, dword ptr [ebp - 0x40]

        $sequence_3 = { 8b5508 8b750c 8910 897004 c7400800000000 8b4f0c 85c9 }
            // n = 7, score = 100
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   8b750c               | mov                 esi, dword ptr [ebp + 0xc]
            //   8910                 | mov                 dword ptr [eax], edx
            //   897004               | mov                 dword ptr [eax + 4], esi
            //   c7400800000000       | mov                 dword ptr [eax + 8], 0
            //   8b4f0c               | mov                 ecx, dword ptr [edi + 0xc]
            //   85c9                 | test                ecx, ecx

        $sequence_4 = { f6401202 7518 85db 7502 8bd8 8d558c 52 }
            // n = 7, score = 100
            //   f6401202             | test                byte ptr [eax + 0x12], 2
            //   7518                 | jne                 0x1a
            //   85db                 | test                ebx, ebx
            //   7502                 | jne                 4
            //   8bd8                 | mov                 ebx, eax
            //   8d558c               | lea                 edx, dword ptr [ebp - 0x74]
            //   52                   | push                edx

        $sequence_5 = { e9???????? 8b5344 33c9 384f13 52 0f94c1 894ddc }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8b5344               | mov                 edx, dword ptr [ebx + 0x44]
            //   33c9                 | xor                 ecx, ecx
            //   384f13               | cmp                 byte ptr [edi + 0x13], cl
            //   52                   | push                edx
            //   0f94c1               | sete                cl
            //   894ddc               | mov                 dword ptr [ebp - 0x24], ecx

        $sequence_6 = { e8???????? 83c428 837df000 7410 8b55ac 52 8bcb }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c428               | add                 esp, 0x28
            //   837df000             | cmp                 dword ptr [ebp - 0x10], 0
            //   7410                 | je                  0x12
            //   8b55ac               | mov                 edx, dword ptr [ebp - 0x54]
            //   52                   | push                edx
            //   8bcb                 | mov                 ecx, ebx

        $sequence_7 = { 8d0481 8d4e01 c6400300 894804 895008 89480c 895010 }
            // n = 7, score = 100
            //   8d0481               | lea                 eax, dword ptr [ecx + eax*4]
            //   8d4e01               | lea                 ecx, dword ptr [esi + 1]
            //   c6400300             | mov                 byte ptr [eax + 3], 0
            //   894804               | mov                 dword ptr [eax + 4], ecx
            //   895008               | mov                 dword ptr [eax + 8], edx
            //   89480c               | mov                 dword ptr [eax + 0xc], ecx
            //   895010               | mov                 dword ptr [eax + 0x10], edx

        $sequence_8 = { e8???????? 8bf8 33c0 83c404 897dec 3bf8 747e }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   33c0                 | xor                 eax, eax
            //   83c404               | add                 esp, 4
            //   897dec               | mov                 dword ptr [ebp - 0x14], edi
            //   3bf8                 | cmp                 edi, eax
            //   747e                 | je                  0x80

        $sequence_9 = { e8???????? 8b550c 8945e8 8b420c 83c40c e8???????? 8b4d0c }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax
            //   8b420c               | mov                 eax, dword ptr [edx + 0xc]
            //   83c40c               | add                 esp, 0xc
            //   e8????????           |                     
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]

    condition:
        7 of them and filesize < 1728512
}
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