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 (20190204 | autogenerated rule brought to you by yara-signator)
rule win_chthonic_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2019-11-26"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator 0.1a"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.chthonic"
        malpedia_version = "20190204"
        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 will be published in the near future 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 = { ff45f4 880c33 42 8b5d08 ebd3 c745f801000000 }
            // n = 6, score = 600
            //   ff45f4               | inc                 dword ptr [ebp - 0xc]
            //   880c33               | mov                 byte ptr [ebx + esi], cl
            //   42                   | inc                 edx
            //   8b5d08               | mov                 ebx, dword ptr [ebp + 8]
            //   ebd3                 | jmp                 0xffffffd5
            //   c745f801000000       | mov                 dword ptr [ebp - 8], 1

        $sequence_1 = { 85ff 0f84e7000000 4f 8bf0 8bcf d3ee 83e601 }
            // n = 7, score = 600
            //   85ff                 | test                edi, edi
            //   0f84e7000000         | je                  0xed
            //   4f                   | dec                 edi
            //   8bf0                 | mov                 esi, eax
            //   8bcf                 | mov                 ecx, edi
            //   d3ee                 | shr                 esi, cl
            //   83e601               | and                 esi, 1

        $sequence_2 = { 5b c9 c3 0fb706 8b4df4 8b0481 03c7 }
            // n = 7, score = 600
            //   5b                   | pop                 ebx
            //   c9                   | leave               
            //   c3                   | ret                 
            //   0fb706               | movzx               eax, word ptr [esi]
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   8b0481               | mov                 eax, dword ptr [ecx + eax*4]
            //   03c7                 | add                 eax, edi

        $sequence_3 = { 5b c9 c3 8b041a }
            // n = 4, score = 600
            //   5b                   | pop                 ebx
            //   c9                   | leave               
            //   c3                   | ret                 
            //   8b041a               | mov                 eax, dword ptr [edx + ebx]

        $sequence_4 = { eb00 85f6 74cb 8b75f8 }
            // n = 4, score = 600
            //   eb00                 | jmp                 2
            //   85f6                 | test                esi, esi
            //   74cb                 | je                  0xffffffcd
            //   8b75f8               | mov                 esi, dword ptr [ebp - 8]

        $sequence_5 = { eb00 8b4df8 8d0c4e 894df8 85ff 0f845d010000 4f }
            // n = 7, score = 600
            //   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
            //   0f845d010000         | je                  0x163
            //   4f                   | dec                 edi

        $sequence_6 = { 0f848d010000 4f 8bf0 8bcf d3ee 83e601 eb00 }
            // n = 7, score = 600
            //   0f848d010000         | je                  0x193
            //   4f                   | dec                 edi
            //   8bf0                 | mov                 esi, eax
            //   8bcf                 | mov                 ecx, edi
            //   d3ee                 | shr                 esi, cl
            //   83e601               | and                 esi, 1
            //   eb00                 | jmp                 2

        $sequence_7 = { 85ff 0f845d010000 4f 8bf0 8bcf d3ee }
            // n = 6, score = 600
            //   85ff                 | test                edi, edi
            //   0f845d010000         | je                  0x163
            //   4f                   | dec                 edi
            //   8bf0                 | mov                 esi, eax
            //   8bcf                 | mov                 ecx, edi
            //   d3ee                 | shr                 esi, cl

        $sequence_8 = { 8bf0 8bcf d3ee 83e601 eb00 85f6 74cf }
            // n = 7, score = 600
            //   8bf0                 | mov                 esi, eax
            //   8bcf                 | mov                 ecx, edi
            //   d3ee                 | shr                 esi, cl
            //   83e601               | and                 esi, 1
            //   eb00                 | jmp                 2
            //   85f6                 | test                esi, esi
            //   74cf                 | je                  0xffffffd1

        $sequence_9 = { eb00 85f6 74cf 8345fc02 b9000d0000 3b4df8 }
            // n = 6, score = 600
            //   eb00                 | jmp                 2
            //   85f6                 | test                esi, esi
            //   74cf                 | je                  0xffffffd1
            //   8345fc02             | add                 dword ptr [ebp - 4], 2
            //   b9000d0000           | mov                 ecx, 0xd00
            //   3b4df8               | cmp                 ecx, dword ptr [ebp - 8]

    condition:
        7 of them
}
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