SYMBOLCOMMON_NAMEaka. SYNONYMS
win.boaxxe (Back to overview)

Boaxxe


There is no description at this point.

References
2014-03-18ESET ResearchPierre-Marc Bureau
@online{bureau:20140318:operation:1b1bd17, author = {Pierre-Marc Bureau}, title = {{Operation Windigo – the vivisection of a large Linux server‑side credential‑stealing malware campaign}}, date = {2014-03-18}, organization = {ESET Research}, url = {https://www.welivesecurity.com/2014/03/18/operation-windigo-the-vivisection-of-a-large-linux-server-side-credential-stealing-malware-campaign/}, language = {English}, urldate = {2019-11-14} } Operation Windigo – the vivisection of a large Linux server‑side credential‑stealing malware campaign
Boaxxe Glupteba
Yara Rules
[TLP:WHITE] win_boaxxe_auto (20211008 | Detects win.boaxxe.)
rule win_boaxxe_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-10-07"
        version = "1"
        description = "Detects win.boaxxe."
        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.boaxxe"
        malpedia_rule_date = "20211007"
        malpedia_hash = "e5b790e0f888f252d49063a1251ca60ec2832535"
        malpedia_version = "20211008"
        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 = { 8945f0 8b45f8 83780400 7507 8b45ec 8907 eb5b }
            // n = 7, score = 100
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   83780400             | cmp                 dword ptr [eax + 4], 0
            //   7507                 | jne                 9
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]
            //   8907                 | mov                 dword ptr [edi], eax
            //   eb5b                 | jmp                 0x5d

        $sequence_1 = { 8b7008 4e 85f6 7c2c 46 33db 8bd3 }
            // n = 7, score = 100
            //   8b7008               | mov                 esi, dword ptr [eax + 8]
            //   4e                   | dec                 esi
            //   85f6                 | test                esi, esi
            //   7c2c                 | jl                  0x2e
            //   46                   | inc                 esi
            //   33db                 | xor                 ebx, ebx
            //   8bd3                 | mov                 edx, ebx

        $sequence_2 = { 83c4dc 53 56 33c0 8945fc 33c0 55 }
            // n = 7, score = 100
            //   83c4dc               | add                 esp, -0x24
            //   53                   | push                ebx
            //   56                   | push                esi
            //   33c0                 | xor                 eax, eax
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   33c0                 | xor                 eax, eax
            //   55                   | push                ebp

        $sequence_3 = { 8bf1 8bd8 8bc6 c1e81d 0103 8bc6 c1e003 }
            // n = 7, score = 100
            //   8bf1                 | mov                 esi, ecx
            //   8bd8                 | mov                 ebx, eax
            //   8bc6                 | mov                 eax, esi
            //   c1e81d               | shr                 eax, 0x1d
            //   0103                 | add                 dword ptr [ebx], eax
            //   8bc6                 | mov                 eax, esi
            //   c1e003               | shl                 eax, 3

        $sequence_4 = { 8b95ecfeffff 8d45ec e8???????? 8d459c 33c9 ba44000000 e8???????? }
            // n = 7, score = 100
            //   8b95ecfeffff         | mov                 edx, dword ptr [ebp - 0x114]
            //   8d45ec               | lea                 eax, dword ptr [ebp - 0x14]
            //   e8????????           |                     
            //   8d459c               | lea                 eax, dword ptr [ebp - 0x64]
            //   33c9                 | xor                 ecx, ecx
            //   ba44000000           | mov                 edx, 0x44
            //   e8????????           |                     

        $sequence_5 = { 8b45ec e8???????? 8b55c0 8d45ec e8???????? 6a00 8d45f4 }
            // n = 7, score = 100
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]
            //   e8????????           |                     
            //   8b55c0               | mov                 edx, dword ptr [ebp - 0x40]
            //   8d45ec               | lea                 eax, dword ptr [ebp - 0x14]
            //   e8????????           |                     
            //   6a00                 | push                0
            //   8d45f4               | lea                 eax, dword ptr [ebp - 0xc]

        $sequence_6 = { e8???????? 8b4da4 b8???????? ba???????? e8???????? 8d55a0 66b81102 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8b4da4               | mov                 ecx, dword ptr [ebp - 0x5c]
            //   b8????????           |                     
            //   ba????????           |                     
            //   e8????????           |                     
            //   8d55a0               | lea                 edx, dword ptr [ebp - 0x60]
            //   66b81102             | mov                 ax, 0x211

        $sequence_7 = { 034c2418 8b7c2410 23fe 8bee f7d5 236c2414 33fd }
            // n = 7, score = 100
            //   034c2418             | add                 ecx, dword ptr [esp + 0x18]
            //   8b7c2410             | mov                 edi, dword ptr [esp + 0x10]
            //   23fe                 | and                 edi, esi
            //   8bee                 | mov                 ebp, esi
            //   f7d5                 | not                 ebp
            //   236c2414             | and                 ebp, dword ptr [esp + 0x14]
            //   33fd                 | xor                 edi, ebp

        $sequence_8 = { 0010 0200 94 0100 0006 304230 c830d530 }
            // n = 7, score = 100
            //   0010                 | add                 byte ptr [eax], dl
            //   0200                 | add                 al, byte ptr [eax]
            //   94                   | xchg                eax, esp
            //   0100                 | add                 dword ptr [eax], eax
            //   0006                 | add                 byte ptr [esi], al
            //   304230               | xor                 byte ptr [edx + 0x30], al
            //   c830d530             | enter               -0x2ad0, 0x30

        $sequence_9 = { e8???????? ff75e0 68???????? 68???????? a1???????? 8b00 33d2 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   ff75e0               | push                dword ptr [ebp - 0x20]
            //   68????????           |                     
            //   68????????           |                     
            //   a1????????           |                     
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   33d2                 | xor                 edx, edx

    condition:
        7 of them and filesize < 1146880
}
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