SYMBOLCOMMON_NAMEaka. SYNONYMS
win.ruckguv (Back to overview)

Ruckguv


There is no description at this point.

References
2016-05-12ProofpointAxel F, Matthew Mesa
@online{f:20160512:hancitor:9c250c0, author = {Axel F and Matthew Mesa}, title = {{Hancitor and Ruckguv Reappear, Updated and With Vawtrak On Deck}}, date = {2016-05-12}, organization = {Proofpoint}, url = {https://www.proofpoint.com/us/threat-insight/post/hancitor-ruckguv-reappear}, language = {English}, urldate = {2019-12-20} } Hancitor and Ruckguv Reappear, Updated and With Vawtrak On Deck
Hancitor Ruckguv
Yara Rules
[TLP:WHITE] win_ruckguv_auto (20230125 | Detects win.ruckguv.)
rule win_ruckguv_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.ruckguv."
        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.ruckguv"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { e8???????? 59 59 ff742404 ffd0 c3 6871a15e72 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   ff742404             | push                dword ptr [esp + 4]
            //   ffd0                 | call                eax
            //   c3                   | ret                 
            //   6871a15e72           | push                0x725ea171

        $sequence_1 = { 83c714 85c0 7583 5e 5f 33c0 }
            // n = 6, score = 200
            //   83c714               | add                 edi, 0x14
            //   85c0                 | test                eax, eax
            //   7583                 | jne                 0xffffff85
            //   5e                   | pop                 esi
            //   5f                   | pop                 edi
            //   33c0                 | xor                 eax, eax

        $sequence_2 = { 51 56 8b7508 8b463c 03c6 8b4834 3bf1 }
            // n = 7, score = 200
            //   51                   | push                ecx
            //   56                   | push                esi
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   8b463c               | mov                 eax, dword ptr [esi + 0x3c]
            //   03c6                 | add                 eax, esi
            //   8b4834               | mov                 ecx, dword ptr [eax + 0x34]
            //   3bf1                 | cmp                 esi, ecx

        $sequence_3 = { 8d4808 894d08 8b4d08 0fb709 668bd9 0fb7c9 }
            // n = 6, score = 200
            //   8d4808               | lea                 ecx, [eax + 8]
            //   894d08               | mov                 dword ptr [ebp + 8], ecx
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   0fb709               | movzx               ecx, word ptr [ecx]
            //   668bd9               | mov                 bx, cx
            //   0fb7c9               | movzx               ecx, cx

        $sequence_4 = { 894564 e8???????? ff7564 894560 }
            // n = 4, score = 200
            //   894564               | mov                 dword ptr [ebp + 0x64], eax
            //   e8????????           |                     
            //   ff7564               | push                dword ptr [ebp + 0x64]
            //   894560               | mov                 dword ptr [ebp + 0x60], eax

        $sequence_5 = { e9???????? 6814f1f808 6a01 e8???????? 59 }
            // n = 5, score = 200
            //   e9????????           |                     
            //   6814f1f808           | push                0x8f8f114
            //   6a01                 | push                1
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_6 = { 03c3 8b8080000000 85c0 0f848b000000 }
            // n = 4, score = 200
            //   03c3                 | add                 eax, ebx
            //   8b8080000000         | mov                 eax, dword ptr [eax + 0x80]
            //   85c0                 | test                eax, eax
            //   0f848b000000         | je                  0x91

        $sequence_7 = { 8b4c2404 803900 56 8bf1 743c }
            // n = 5, score = 200
            //   8b4c2404             | mov                 ecx, dword ptr [esp + 4]
            //   803900               | cmp                 byte ptr [ecx], 0
            //   56                   | push                esi
            //   8bf1                 | mov                 esi, ecx
            //   743c                 | je                  0x3e

        $sequence_8 = { e8???????? ff7560 e9???????? ff7564 e8???????? }
            // n = 5, score = 200
            //   e8????????           |                     
            //   ff7560               | push                dword ptr [ebp + 0x60]
            //   e9????????           |                     
            //   ff7564               | push                dword ptr [ebp + 0x64]
            //   e8????????           |                     

        $sequence_9 = { e8???????? 83c430 57 e8???????? 56 ff15???????? }
            // n = 6, score = 200
            //   e8????????           |                     
            //   83c430               | add                 esp, 0x30
            //   57                   | push                edi
            //   e8????????           |                     
            //   56                   | push                esi
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 41024
}
Download all Yara Rules