SYMBOLCOMMON_NAMEaka. SYNONYMS
win.aveo (Back to overview)

Aveo


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References
2020SecureworksSecureWorks
@online{secureworks:2020:bronze:79d8dd2, author = {SecureWorks}, title = {{BRONZE OVERBROOK}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/bronze-overbrook}, language = {English}, urldate = {2020-05-23} } BRONZE OVERBROOK
Aveo DDKONG IsSpace PLAINTEE PlugX Rambo DragonOK
2016-08-16Palo Alto Networks Unit 42Josh Grunzweig, Robert Falcone
@online{grunzweig:20160816:aveo:6f3cf5c, author = {Josh Grunzweig and Robert Falcone}, title = {{Aveo Malware Family Targets Japanese Speaking Users}}, date = {2016-08-16}, organization = {Palo Alto Networks Unit 42}, url = {http://researchcenter.paloaltonetworks.com/2016/08/unit42-aveo-malware-family-targets-japanese-speaking-users/}, language = {English}, urldate = {2019-12-20} } Aveo Malware Family Targets Japanese Speaking Users
Aveo
Yara Rules
[TLP:WHITE] win_aveo_auto (20200529 | autogenerated rule brought to you by yara-signator)
rule win_aveo_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.aveo"
        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 = { b802000000 5f 5e 8b4df8 33cd }
            // n = 5, score = 200
            //   b802000000           | mov                 eax, 2
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   33cd                 | xor                 ecx, ebp

        $sequence_1 = { ffd3 8d85ccfaffff 50 8d85d8faffff 8d8df0faffff c785d8faffff00000000 }
            // n = 6, score = 200
            //   ffd3                 | call                ebx
            //   8d85ccfaffff         | lea                 eax, [ebp - 0x534]
            //   50                   | push                eax
            //   8d85d8faffff         | lea                 eax, [ebp - 0x528]
            //   8d8df0faffff         | lea                 ecx, [ebp - 0x510]
            //   c785d8faffff00000000     | mov    dword ptr [ebp - 0x528], 0

        $sequence_2 = { 2b34bd002e4100 c1fe06 8bc7 c1e005 03f0 8975e4 }
            // n = 6, score = 200
            //   2b34bd002e4100       | sub                 esi, dword ptr [edi*4 + 0x412e00]
            //   c1fe06               | sar                 esi, 6
            //   8bc7                 | mov                 eax, edi
            //   c1e005               | shl                 eax, 5
            //   03f0                 | add                 esi, eax
            //   8975e4               | mov                 dword ptr [ebp - 0x1c], esi

        $sequence_3 = { 8d8dfefeffff 6a00 51 8995f8feffff 668985fcfeffff }
            // n = 5, score = 200
            //   8d8dfefeffff         | lea                 ecx, [ebp - 0x102]
            //   6a00                 | push                0
            //   51                   | push                ecx
            //   8995f8feffff         | mov                 dword ptr [ebp - 0x108], edx
            //   668985fcfeffff       | mov                 word ptr [ebp - 0x104], ax

        $sequence_4 = { 50 a1???????? 8d942426020000 52 }
            // n = 4, score = 200
            //   50                   | push                eax
            //   a1????????           |                     
            //   8d942426020000       | lea                 edx, [esp + 0x226]
            //   52                   | push                edx

        $sequence_5 = { 8bec 81ec64060000 a1???????? 33c5 8945f8 56 }
            // n = 6, score = 200
            //   8bec                 | mov                 ebp, esp
            //   81ec64060000         | sub                 esp, 0x664
            //   a1????????           |                     
            //   33c5                 | xor                 eax, ebp
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   56                   | push                esi

        $sequence_6 = { 89bbd8000000 39bdf8efffff 0f85c5000000 c785f8efffff12270000 }
            // n = 4, score = 200
            //   89bbd8000000         | mov                 dword ptr [ebx + 0xd8], edi
            //   39bdf8efffff         | cmp                 dword ptr [ebp - 0x1008], edi
            //   0f85c5000000         | jne                 0xcb
            //   c785f8efffff12270000     | mov    dword ptr [ebp - 0x1008], 0x2712

        $sequence_7 = { 0fb60b 40 80b95014410000 74e8 8a13 0fb6ca 0fbe8950144100 }
            // n = 7, score = 200
            //   0fb60b               | movzx               ecx, byte ptr [ebx]
            //   40                   | inc                 eax
            //   80b95014410000       | cmp                 byte ptr [ecx + 0x411450], 0
            //   74e8                 | je                  0xffffffea
            //   8a13                 | mov                 dl, byte ptr [ebx]
            //   0fb6ca               | movzx               ecx, dl
            //   0fbe8950144100       | movsx               ecx, byte ptr [ecx + 0x411450]

        $sequence_8 = { 85c0 7559 ff15???????? eb51 3c32 }
            // n = 5, score = 200
            //   85c0                 | test                eax, eax
            //   7559                 | jne                 0x5b
            //   ff15????????         |                     
            //   eb51                 | jmp                 0x53
            //   3c32                 | cmp                 al, 0x32

        $sequence_9 = { 8d95d0feffff 83c40c 8945d9 8945dd 8945e1 668945e5 }
            // n = 6, score = 200
            //   8d95d0feffff         | lea                 edx, [ebp - 0x130]
            //   83c40c               | add                 esp, 0xc
            //   8945d9               | mov                 dword ptr [ebp - 0x27], eax
            //   8945dd               | mov                 dword ptr [ebp - 0x23], eax
            //   8945e1               | mov                 dword ptr [ebp - 0x1f], eax
            //   668945e5             | mov                 word ptr [ebp - 0x1b], ax

    condition:
        7 of them and filesize < 180224
}
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