SYMBOLCOMMON_NAMEaka. SYNONYMS
win.chthonic (Back to overview)

Chthonic

aka: AndroKINS
URLhaus    

There is no description at this point.

References
2017-08-24Blaze's Security BlogBartBlaze
@online{bartblaze:20170824:crystal:16adb4a, author = {BartBlaze}, title = {{Crystal Finance Millennium used to spread malware}}, date = {2017-08-24}, organization = {Blaze's Security Blog}, url = {https://bartblaze.blogspot.com/2017/08/crystal-finance-millennium-used-to.html}, language = {English}, urldate = {2020-02-01} } Crystal Finance Millennium used to spread malware
Chthonic SmokeLoader
2016-07-26ProofpointProofpoint
@online{proofpoint:20160726:threat:076e87a, author = {Proofpoint}, title = {{Threat Actors Using Legitimate PayPal Accounts To Distribute Chthonic Banking Trojan}}, date = {2016-07-26}, organization = {Proofpoint}, url = {https://www.proofpoint.com/us/threat-insight/post/threat-actors-using-legitimate-paypal-accounts-to-distribute-chthonic-banking-trojan}, language = {English}, urldate = {2019-07-09} } Threat Actors Using Legitimate PayPal Accounts To Distribute Chthonic Banking Trojan
Azorult Chthonic
Yara Rules
[TLP:WHITE] win_chthonic_auto (20200529 | autogenerated rule brought to you by yara-signator)
rule win_chthonic_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-05-30"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.chthonic"
        malpedia_rule_date = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        malpedia_license = "CC BY-NC-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 / approach 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 = { c1c108 81e1ff00ff00 0bc1 89470c 5f 5e 5b }
            // n = 7, score = 600
            //   c1c108               | rol                 ecx, 8
            //   81e1ff00ff00         | and                 ecx, 0xff00ff
            //   0bc1                 | or                  eax, ecx
            //   89470c               | mov                 dword ptr [edi + 0xc], eax
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx

        $sequence_1 = { 7cf4 33f6 33d2 8bc6 f77514 }
            // n = 5, score = 600
            //   7cf4                 | jl                  0xfffffff6
            //   33f6                 | xor                 esi, esi
            //   33d2                 | xor                 edx, edx
            //   8bc6                 | mov                 eax, esi
            //   f77514               | div                 dword ptr [ebp + 0x14]

        $sequence_2 = { 0f845d010000 4f 8bf0 8bcf }
            // n = 4, score = 600
            //   0f845d010000         | je                  0x163
            //   4f                   | dec                 edi
            //   8bf0                 | mov                 esi, eax
            //   8bcf                 | mov                 ecx, edi

        $sequence_3 = { 74cf 8345fc02 b9000d0000 3b4df8 1bc9 f7d9 014dfc }
            // n = 7, score = 600
            //   74cf                 | je                  0xffffffd1
            //   8345fc02             | add                 dword ptr [ebp - 4], 2
            //   b9000d0000           | mov                 ecx, 0xd00
            //   3b4df8               | cmp                 ecx, dword ptr [ebp - 8]
            //   1bc9                 | sbb                 ecx, ecx
            //   f7d9                 | neg                 ecx
            //   014dfc               | add                 dword ptr [ebp - 4], ecx

        $sequence_4 = { 5f 894dfc e9???????? 0fb60c1a 83c6fd c1e608 }
            // n = 6, score = 600
            //   5f                   | pop                 edi
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   e9????????           |                     
            //   0fb60c1a             | movzx               ecx, byte ptr [edx + ebx]
            //   83c6fd               | add                 esi, -3
            //   c1e608               | shl                 esi, 8

        $sequence_5 = { 8911 0fb64dff 46 8908 }
            // n = 4, score = 600
            //   8911                 | mov                 dword ptr [ecx], edx
            //   0fb64dff             | movzx               ecx, byte ptr [ebp - 1]
            //   46                   | inc                 esi
            //   8908                 | mov                 dword ptr [eax], ecx

        $sequence_6 = { 8d84b5fcfbffff 8b08 03f9 81e7ff000080 7908 4f 81cf00ffffff }
            // n = 7, score = 600
            //   8d84b5fcfbffff       | lea                 eax, [ebp + esi*4 - 0x404]
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   03f9                 | add                 edi, ecx
            //   81e7ff000080         | and                 edi, 0x800000ff
            //   7908                 | jns                 0xa
            //   4f                   | dec                 edi
            //   81cf00ffffff         | or                  edi, 0xffffff00

        $sequence_7 = { 8845ff 8d84bdfcfbffff 8b10 8911 0fb64dff 46 }
            // n = 6, score = 600
            //   8845ff               | mov                 byte ptr [ebp - 1], al
            //   8d84bdfcfbffff       | lea                 eax, [ebp + edi*4 - 0x404]
            //   8b10                 | mov                 edx, dword ptr [eax]
            //   8911                 | mov                 dword ptr [ecx], edx
            //   0fb64dff             | movzx               ecx, byte ptr [ebp - 1]
            //   46                   | inc                 esi

        $sequence_8 = { 40 3bc3 7cf4 33f6 33d2 8bc6 }
            // n = 6, score = 600
            //   40                   | inc                 eax
            //   3bc3                 | cmp                 eax, ebx
            //   7cf4                 | jl                  0xfffffff6
            //   33f6                 | xor                 esi, esi
            //   33d2                 | xor                 edx, edx
            //   8bc6                 | mov                 eax, esi

        $sequence_9 = { 83e601 eb00 8b4df8 8d0c4e 894df8 85ff }
            // n = 6, score = 600
            //   83e601               | and                 esi, 1
            //   eb00                 | jmp                 2
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   8d0c4e               | lea                 ecx, [esi + ecx*2]
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   85ff                 | test                edi, edi

    condition:
        7 of them and filesize < 425984
}
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