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 (20220411 | Detects win.credraptor.)
rule win_credraptor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        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 = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { c60100 6a01 8d0c00 52 b8???????? 8d5308 e8???????? }
            // n = 7, score = 100
            //   c60100               | mov                 byte ptr [ecx], 0
            //   6a01                 | push                1
            //   8d0c00               | lea                 ecx, dword ptr [eax + eax]
            //   52                   | push                edx
            //   b8????????           |                     
            //   8d5308               | lea                 edx, dword ptr [ebx + 8]
            //   e8????????           |                     

        $sequence_1 = { 8d95f8feffff 56 52 e8???????? 8dbdf8feffff 83c40c 4f }
            // n = 7, score = 100
            //   8d95f8feffff         | lea                 edx, dword ptr [ebp - 0x108]
            //   56                   | push                esi
            //   52                   | push                edx
            //   e8????????           |                     
            //   8dbdf8feffff         | lea                 edi, dword ptr [ebp - 0x108]
            //   83c40c               | add                 esp, 0xc
            //   4f                   | dec                 edi

        $sequence_2 = { e9???????? 8b4d18 8b5114 8b4508 8b4838 8b703c 895528 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8b4d18               | mov                 ecx, dword ptr [ebp + 0x18]
            //   8b5114               | mov                 edx, dword ptr [ecx + 0x14]
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8b4838               | mov                 ecx, dword ptr [eax + 0x38]
            //   8b703c               | mov                 esi, dword ptr [eax + 0x3c]
            //   895528               | mov                 dword ptr [ebp + 0x28], edx

        $sequence_3 = { ffd0 83c414 015e48 8945f4 83564c00 015dfc 85c0 }
            // n = 7, score = 100
            //   ffd0                 | call                eax
            //   83c414               | add                 esp, 0x14
            //   015e48               | add                 dword ptr [esi + 0x48], ebx
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   83564c00             | adc                 dword ptr [esi + 0x4c], 0
            //   015dfc               | add                 dword ptr [ebp - 4], ebx
            //   85c0                 | test                eax, eax

        $sequence_4 = { 85c0 0f8ebf030000 8d9618030000 8955f0 8945dc 8d4900 8b45f0 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   0f8ebf030000         | jle                 0x3c5
            //   8d9618030000         | lea                 edx, dword ptr [esi + 0x318]
            //   8955f0               | mov                 dword ptr [ebp - 0x10], edx
            //   8945dc               | mov                 dword ptr [ebp - 0x24], eax
            //   8d4900               | lea                 ecx, dword ptr [ecx]
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]

        $sequence_5 = { e8???????? 8bf0 83c404 85f6 7414 8b5744 52 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c404               | add                 esp, 4
            //   85f6                 | test                esi, esi
            //   7414                 | je                  0x16
            //   8b5744               | mov                 edx, dword ptr [edi + 0x44]
            //   52                   | push                edx

        $sequence_6 = { 89480c 894810 66c7005f00 8b7320 8b5318 397254 7f0d }
            // n = 7, score = 100
            //   89480c               | mov                 dword ptr [eax + 0xc], ecx
            //   894810               | mov                 dword ptr [eax + 0x10], ecx
            //   66c7005f00           | mov                 word ptr [eax], 0x5f
            //   8b7320               | mov                 esi, dword ptr [ebx + 0x20]
            //   8b5318               | mov                 edx, dword ptr [ebx + 0x18]
            //   397254               | cmp                 dword ptr [edx + 0x54], esi
            //   7f0d                 | jg                  0xf

        $sequence_7 = { b8???????? 83c9ff e8???????? 8b55fc 83c408 8a4514 81fb84000000 }
            // n = 7, score = 100
            //   b8????????           |                     
            //   83c9ff               | or                  ecx, 0xffffffff
            //   e8????????           |                     
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   83c408               | add                 esp, 8
            //   8a4514               | mov                 al, byte ptr [ebp + 0x14]
            //   81fb84000000         | cmp                 ebx, 0x84

        $sequence_8 = { e8???????? 8b4d0c 83c40c 8d45fc 50 51 57 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   83c40c               | add                 esp, 0xc
            //   8d45fc               | lea                 eax, dword ptr [ebp - 4]
            //   50                   | push                eax
            //   51                   | push                ecx
            //   57                   | push                edi

        $sequence_9 = { 8da42400000000 38043a 7507 83c202 3bd3 7cf4 33db }
            // n = 7, score = 100
            //   8da42400000000       | lea                 esp, dword ptr [esp]
            //   38043a               | cmp                 byte ptr [edx + edi], al
            //   7507                 | jne                 9
            //   83c202               | add                 edx, 2
            //   3bd3                 | cmp                 edx, ebx
            //   7cf4                 | jl                  0xfffffff6
            //   33db                 | xor                 ebx, ebx

    condition:
        7 of them and filesize < 1728512
}
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