SYMBOLCOMMON_NAMEaka. SYNONYMS
win.odinaff (Back to overview)

Odinaff


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References
2016-10-11SymantecSymantec Security Response
@online{response:20161011:odinaff:bdd6f10, author = {Symantec Security Response}, title = {{Odinaff: New Trojan used in high level financial attacks}}, date = {2016-10-11}, organization = {Symantec}, url = {https://web.archive.org/web/20161223002016/https://www.symantec.com/connect/blogs/odinaff-new-trojan-used-high-level-financial-attacks}, language = {English}, urldate = {2020-04-21} } Odinaff: New Trojan used in high level financial attacks
Batel FlawedAmmyy Odinaff RMS Anunak
2016-10-11SymantecSymantec Security Response
@online{response:20161011:odinaff:36b35db, author = {Symantec Security Response}, title = {{Odinaff: New Trojan used in high level financial attacks}}, date = {2016-10-11}, organization = {Symantec}, url = {https://www.symantec.com/connect/blogs/odinaff-new-trojan-used-high-level-financial-attacks}, language = {English}, urldate = {2019-12-05} } Odinaff: New Trojan used in high level financial attacks
Cobalt Strike KLRD MimiKatz Odinaff Anunak
Yara Rules
[TLP:WHITE] win_odinaff_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_odinaff_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.odinaff"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { c3 8b0d???????? 41 81e1ff000000 }
            // n = 4, score = 200
            //   c3                   | ret                 
            //   8b0d????????         |                     
            //   41                   | inc                 ecx
            //   81e1ff000000         | and                 ecx, 0xff

        $sequence_1 = { 85f6 7411 8d55fc 52 }
            // n = 4, score = 200
            //   85f6                 | test                esi, esi
            //   7411                 | je                  0x13
            //   8d55fc               | lea                 edx, [ebp - 4]
            //   52                   | push                edx

        $sequence_2 = { 50 6a59 ff15???????? 0fb74ddc 0fb655e2 50 8b85d0feffff }
            // n = 7, score = 200
            //   50                   | push                eax
            //   6a59                 | push                0x59
            //   ff15????????         |                     
            //   0fb74ddc             | movzx               ecx, word ptr [ebp - 0x24]
            //   0fb655e2             | movzx               edx, byte ptr [ebp - 0x1e]
            //   50                   | push                eax
            //   8b85d0feffff         | mov                 eax, dword ptr [ebp - 0x130]

        $sequence_3 = { 55 8bec 81ec0c020000 6804020000 8d85f8fdffff }
            // n = 5, score = 200
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81ec0c020000         | sub                 esp, 0x20c
            //   6804020000           | push                0x204
            //   8d85f8fdffff         | lea                 eax, [ebp - 0x208]

        $sequence_4 = { 85f6 741b 0fb61439 33d0 81e2ff000000 }
            // n = 5, score = 200
            //   85f6                 | test                esi, esi
            //   741b                 | je                  0x1d
            //   0fb61439             | movzx               edx, byte ptr [ecx + edi]
            //   33d0                 | xor                 edx, eax
            //   81e2ff000000         | and                 edx, 0xff

        $sequence_5 = { ff15???????? 83c410 85ff 7410 }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   83c410               | add                 esp, 0x10
            //   85ff                 | test                edi, edi
            //   7410                 | je                  0x12

        $sequence_6 = { e9???????? 8b4db0 8b55a8 6a00 6a00 6a03 6a00 }
            // n = 7, score = 200
            //   e9????????           |                     
            //   8b4db0               | mov                 ecx, dword ptr [ebp - 0x50]
            //   8b55a8               | mov                 edx, dword ptr [ebp - 0x58]
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a03                 | push                3
            //   6a00                 | push                0

        $sequence_7 = { 8b45f4 8b3d???????? 85c0 740c }
            // n = 4, score = 200
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   8b3d????????         |                     
            //   85c0                 | test                eax, eax
            //   740c                 | je                  0xe

        $sequence_8 = { b8???????? e8???????? 8b1d???????? 83c410 f7d8 1bf6 }
            // n = 6, score = 200
            //   b8????????           |                     
            //   e8????????           |                     
            //   8b1d????????         |                     
            //   83c410               | add                 esp, 0x10
            //   f7d8                 | neg                 eax
            //   1bf6                 | sbb                 esi, esi

        $sequence_9 = { 895db8 8b5df4 68???????? 53 }
            // n = 4, score = 200
            //   895db8               | mov                 dword ptr [ebp - 0x48], ebx
            //   8b5df4               | mov                 ebx, dword ptr [ebp - 0xc]
            //   68????????           |                     
            //   53                   | push                ebx

    condition:
        7 of them and filesize < 73728
}
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