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 (20201023 | autogenerated rule brought to you by yara-signator)
rule win_aveo_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.aveo"
        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 = { 59 59 8b7508 8d34f550154100 391e 7404 }
            // n = 6, score = 200
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   8d34f550154100       | lea                 esi, [esi*8 + 0x411550]
            //   391e                 | cmp                 dword ptr [esi], ebx
            //   7404                 | je                  6

        $sequence_1 = { 57 83e61f 8d3c85002e4100 8b07 c1e606 8a4c3004 f6c101 }
            // n = 7, score = 200
            //   57                   | push                edi
            //   83e61f               | and                 esi, 0x1f
            //   8d3c85002e4100       | lea                 edi, [eax*4 + 0x412e00]
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   c1e606               | shl                 esi, 6
            //   8a4c3004             | mov                 cl, byte ptr [eax + esi + 4]
            //   f6c101               | test                cl, 1

        $sequence_2 = { 68???????? 50 e8???????? 6a44 8d8d9cf9ffff 6a00 51 }
            // n = 7, score = 200
            //   68????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   6a44                 | push                0x44
            //   8d8d9cf9ffff         | lea                 ecx, [ebp - 0x664]
            //   6a00                 | push                0
            //   51                   | push                ecx

        $sequence_3 = { 8bc6 c1f805 8b0485002e4100 83e61f c1e606 59 c644300400 }
            // n = 7, score = 200
            //   8bc6                 | mov                 eax, esi
            //   c1f805               | sar                 eax, 5
            //   8b0485002e4100       | mov                 eax, dword ptr [eax*4 + 0x412e00]
            //   83e61f               | and                 esi, 0x1f
            //   c1e606               | shl                 esi, 6
            //   59                   | pop                 ecx
            //   c644300400           | mov                 byte ptr [eax + esi + 4], 0

        $sequence_4 = { 8985cafdffff 668985cefdffff 8945e9 8945ed 8945f1 }
            // n = 5, score = 200
            //   8985cafdffff         | mov                 dword ptr [ebp - 0x236], eax
            //   668985cefdffff       | mov                 word ptr [ebp - 0x232], ax
            //   8945e9               | mov                 dword ptr [ebp - 0x17], eax
            //   8945ed               | mov                 dword ptr [ebp - 0x13], eax
            //   8945f1               | mov                 dword ptr [ebp - 0xf], eax

        $sequence_5 = { e8???????? 83c404 898508feffff 3bc3 7515 }
            // n = 5, score = 200
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   898508feffff         | mov                 dword ptr [ebp - 0x1f8], eax
            //   3bc3                 | cmp                 eax, ebx
            //   7515                 | jne                 0x17

        $sequence_6 = { 51 e8???????? 6800010000 8d95f4fdffff 6a00 }
            // n = 5, score = 200
            //   51                   | push                ecx
            //   e8????????           |                     
            //   6800010000           | push                0x100
            //   8d95f4fdffff         | lea                 edx, [ebp - 0x20c]
            //   6a00                 | push                0

        $sequence_7 = { 83c404 89858cfdffff 3bc3 7515 68???????? }
            // n = 5, score = 200
            //   83c404               | add                 esp, 4
            //   89858cfdffff         | mov                 dword ptr [ebp - 0x274], eax
            //   3bc3                 | cmp                 eax, ebx
            //   7515                 | jne                 0x17
            //   68????????           |                     

        $sequence_8 = { 75f6 68ff000000 8d95d1fdffff 53 52 889dd0fdffff }
            // n = 6, score = 200
            //   75f6                 | jne                 0xfffffff8
            //   68ff000000           | push                0xff
            //   8d95d1fdffff         | lea                 edx, [ebp - 0x22f]
            //   53                   | push                ebx
            //   52                   | push                edx
            //   889dd0fdffff         | mov                 byte ptr [ebp - 0x230], bl

        $sequence_9 = { 750d 80bdfaefffff44 0f848d000000 68???????? bf02000000 8db5e4efffff e8???????? }
            // n = 7, score = 200
            //   750d                 | jne                 0xf
            //   80bdfaefffff44       | cmp                 byte ptr [ebp - 0x1006], 0x44
            //   0f848d000000         | je                  0x93
            //   68????????           |                     
            //   bf02000000           | mov                 edi, 2
            //   8db5e4efffff         | lea                 esi, [ebp - 0x101c]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 180224
}
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