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 (20201023 | autogenerated rule brought to you by yara-signator)
rule win_odinaff_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.odinaff"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { b8???????? e8???????? 8b45f8 83c410 85c0 }
            // n = 5, score = 200
            //   b8????????           |                     
            //   e8????????           |                     
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   83c410               | add                 esp, 0x10
            //   85c0                 | test                eax, eax

        $sequence_1 = { 3d1f040000 7505 bf01000000 56 ff15???????? 8bc7 5f }
            // n = 7, score = 200
            //   3d1f040000           | cmp                 eax, 0x41f
            //   7505                 | jne                 7
            //   bf01000000           | mov                 edi, 1
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi

        $sequence_2 = { 83c40c 6a00 6a00 57 52 }
            // n = 5, score = 200
            //   83c40c               | add                 esp, 0xc
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   57                   | push                edi
            //   52                   | push                edx

        $sequence_3 = { 6a00 6a03 6816011200 53 ff15???????? 8bf8 83ffff }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   6a03                 | push                3
            //   6816011200           | push                0x120116
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax
            //   83ffff               | cmp                 edi, -1

        $sequence_4 = { 750e ff15???????? 8b4df4 33c0 668901 68???????? }
            // n = 6, score = 200
            //   750e                 | jne                 0x10
            //   ff15????????         |                     
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   33c0                 | xor                 eax, eax
            //   668901               | mov                 word ptr [ecx], ax
            //   68????????           |                     

        $sequence_5 = { 750e ff15???????? 5f 33c0 5e 8be5 5d }
            // n = 7, score = 200
            //   750e                 | jne                 0x10
            //   ff15????????         |                     
            //   5f                   | pop                 edi
            //   33c0                 | xor                 eax, eax
            //   5e                   | pop                 esi
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp

        $sequence_6 = { c3 8b45fc 6a00 8d55f8 52 50 }
            // n = 6, score = 200
            //   c3                   | ret                 
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   6a00                 | push                0
            //   8d55f8               | lea                 edx, [ebp - 8]
            //   52                   | push                edx
            //   50                   | push                eax

        $sequence_7 = { 6a1f 56 ff15???????? 8b4d10 8b550c 51 }
            // n = 6, score = 200
            //   6a1f                 | push                0x1f
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   51                   | push                ecx

        $sequence_8 = { 41 81e1ff000000 8a9138474000 0fb6c2 }
            // n = 4, score = 200
            //   41                   | inc                 ecx
            //   81e1ff000000         | and                 ecx, 0xff
            //   8a9138474000         | mov                 dl, byte ptr [ecx + 0x404738]
            //   0fb6c2               | movzx               eax, dl

        $sequence_9 = { 8b45e8 5f 5e 85c0 7407 }
            // n = 5, score = 200
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   85c0                 | test                eax, eax
            //   7407                 | je                  9

    condition:
        7 of them and filesize < 73728
}
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