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 (20210616 | Detects win.aveo.)
rule win_aveo_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.aveo."
        info = "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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 0bda 0fb69390fa4000 88543002 0fb6543902 83e23f 0fb69290fa4000 88543003 }
            // n = 7, score = 200
            //   0bda                 | or                  ebx, edx
            //   0fb69390fa4000       | movzx               edx, byte ptr [ebx + 0x40fa90]
            //   88543002             | mov                 byte ptr [eax + esi + 2], dl
            //   0fb6543902           | movzx               edx, byte ptr [ecx + edi + 2]
            //   83e23f               | and                 edx, 0x3f
            //   0fb69290fa4000       | movzx               edx, byte ptr [edx + 0x40fa90]
            //   88543003             | mov                 byte ptr [eax + esi + 3], dl

        $sequence_1 = { 8bcf 83e11f c1e106 8b0485002e4100 c644080401 }
            // n = 5, score = 200
            //   8bcf                 | mov                 ecx, edi
            //   83e11f               | and                 ecx, 0x1f
            //   c1e106               | shl                 ecx, 6
            //   8b0485002e4100       | mov                 eax, dword ptr [eax*4 + 0x412e00]
            //   c644080401           | mov                 byte ptr [eax + ecx + 4], 1

        $sequence_2 = { 8b5508 8b0e 57 52 03c8 }
            // n = 5, score = 200
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   57                   | push                edi
            //   52                   | push                edx
            //   03c8                 | add                 ecx, eax

        $sequence_3 = { ffd0 8345e404 ebe6 c745e004e24000 }
            // n = 4, score = 200
            //   ffd0                 | call                eax
            //   8345e404             | add                 dword ptr [ebp - 0x1c], 4
            //   ebe6                 | jmp                 0xffffffe8
            //   c745e004e24000       | mov                 dword ptr [ebp - 0x20], 0x40e204

        $sequence_4 = { 8d8554faffff 8d8d70faffff e8???????? 8b955cfaffff 52 e8???????? }
            // n = 6, score = 200
            //   8d8554faffff         | lea                 eax, dword ptr [ebp - 0x5ac]
            //   8d8d70faffff         | lea                 ecx, dword ptr [ebp - 0x590]
            //   e8????????           |                     
            //   8b955cfaffff         | mov                 edx, dword ptr [ebp - 0x5a4]
            //   52                   | push                edx
            //   e8????????           |                     

        $sequence_5 = { 83c40c c644080100 e8???????? 33c0 5f }
            // n = 5, score = 200
            //   83c40c               | add                 esp, 0xc
            //   c644080100           | mov                 byte ptr [eax + ecx + 1], 0
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax
            //   5f                   | pop                 edi

        $sequence_6 = { 85c0 7516 a1???????? 8b0d???????? a3???????? 890d???????? }
            // n = 6, score = 200
            //   85c0                 | test                eax, eax
            //   7516                 | jne                 0x18
            //   a1????????           |                     
            //   8b0d????????         |                     
            //   a3????????           |                     
            //   890d????????         |                     

        $sequence_7 = { 889df8feffff e8???????? 83c40c 8db510feffff e8???????? be00100000 56 }
            // n = 7, score = 200
            //   889df8feffff         | mov                 byte ptr [ebp - 0x108], bl
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8db510feffff         | lea                 esi, dword ptr [ebp - 0x1f0]
            //   e8????????           |                     
            //   be00100000           | mov                 esi, 0x1000
            //   56                   | push                esi

        $sequence_8 = { 85c0 7461 8d0cbd002e4100 8901 8305????????20 }
            // n = 5, score = 200
            //   85c0                 | test                eax, eax
            //   7461                 | je                  0x63
            //   8d0cbd002e4100       | lea                 ecx, dword ptr [edi*4 + 0x412e00]
            //   8901                 | mov                 dword ptr [ecx], eax
            //   8305????????20       |                     

        $sequence_9 = { 51 e8???????? 8b4df8 83c404 5f }
            // n = 5, score = 200
            //   51                   | push                ecx
            //   e8????????           |                     
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   83c404               | add                 esp, 4
            //   5f                   | pop                 edi

    condition:
        7 of them and filesize < 180224
}
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