SYMBOLCOMMON_NAMEaka. SYNONYMS
win.smac (Back to overview)

smac

aka: speccom

There is no description at this point.

References
2020SecureworksSecureWorks
@online{secureworks:2020:bronze:fcb04ab, author = {SecureWorks}, title = {{BRONZE EXPRESS}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/bronze-express}, language = {English}, urldate = {2020-05-23} } BRONZE EXPRESS
9002 RAT CHINACHOPPER IsSpace NewCT PlugX smac APT 26
2015-08-10shadowserverNed Moran, Ben Koehl
@techreport{moran:20150810:italian:26b33c4, author = {Ned Moran and Ben Koehl}, title = {{The Italian Connection: An analysis of exploit supply chains and digital quartermasters}}, date = {2015-08-10}, institution = {shadowserver}, url = {https://paper.seebug.org/papers/APT/APT_CyberCriminal_Campagin/2015/Aug.10.The_Italian_Connection_An_analysis_of_exploit_supply_chains_and_digital_quartermasters/HTExploitTelemetry.pdf}, language = {English}, urldate = {2020-01-07} } The Italian Connection: An analysis of exploit supply chains and digital quartermasters
smac Violin Panda
Yara Rules
[TLP:WHITE] win_smac_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_smac_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.smac"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { 8d8538fbffff 50 ffd6 6a43 58 6a6d 668945d8 }
            // n = 7, score = 200
            //   8d8538fbffff         | lea                 eax, [ebp - 0x4c8]
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   6a43                 | push                0x43
            //   58                   | pop                 eax
            //   6a6d                 | push                0x6d
            //   668945d8             | mov                 word ptr [ebp - 0x28], ax

        $sequence_1 = { 39bd78feffff 0f86b8000000 ffb578feffff e8???????? ffb578feffff 8bf0 57 }
            // n = 7, score = 200
            //   39bd78feffff         | cmp                 dword ptr [ebp - 0x188], edi
            //   0f86b8000000         | jbe                 0xbe
            //   ffb578feffff         | push                dword ptr [ebp - 0x188]
            //   e8????????           |                     
            //   ffb578feffff         | push                dword ptr [ebp - 0x188]
            //   8bf0                 | mov                 esi, eax
            //   57                   | push                edi

        $sequence_2 = { 66894c244c 8d8b8c000000 c684245801000001 83791408 894c2420 897910 7202 }
            // n = 7, score = 200
            //   66894c244c           | mov                 word ptr [esp + 0x4c], cx
            //   8d8b8c000000         | lea                 ecx, [ebx + 0x8c]
            //   c684245801000001     | mov                 byte ptr [esp + 0x158], 1
            //   83791408             | cmp                 dword ptr [ecx + 0x14], 8
            //   894c2420             | mov                 dword ptr [esp + 0x20], ecx
            //   897910               | mov                 dword ptr [ecx + 0x10], edi
            //   7202                 | jb                  4

        $sequence_3 = { 8d8424cc040000 50 ffd6 83f8ff 7506 895c240c }
            // n = 6, score = 200
            //   8d8424cc040000       | lea                 eax, [esp + 0x4cc]
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   83f8ff               | cmp                 eax, -1
            //   7506                 | jne                 8
            //   895c240c             | mov                 dword ptr [esp + 0xc], ebx

        $sequence_4 = { 8bdf 66899d54ffffff 5b 66899d56ffffff 8bd8 66899d58ffffff 8bd9 }
            // n = 7, score = 200
            //   8bdf                 | mov                 ebx, edi
            //   66899d54ffffff       | mov                 word ptr [ebp - 0xac], bx
            //   5b                   | pop                 ebx
            //   66899d56ffffff       | mov                 word ptr [ebp - 0xaa], bx
            //   8bd8                 | mov                 ebx, eax
            //   66899d58ffffff       | mov                 word ptr [ebp - 0xa8], bx
            //   8bd9                 | mov                 ebx, ecx

        $sequence_5 = { 8a8230214100 884101 0fb645ff 8bd0 c1ea06 c1e702 0bd7 }
            // n = 7, score = 200
            //   8a8230214100         | mov                 al, byte ptr [edx + 0x412130]
            //   884101               | mov                 byte ptr [ecx + 1], al
            //   0fb645ff             | movzx               eax, byte ptr [ebp - 1]
            //   8bd0                 | mov                 edx, eax
            //   c1ea06               | shr                 edx, 6
            //   c1e702               | shl                 edi, 2
            //   0bd7                 | or                  edx, edi

        $sequence_6 = { e8???????? 8d9d18f0ffff e8???????? 33db 43 53 8db5dcf0ffff }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8d9d18f0ffff         | lea                 ebx, [ebp - 0xfe8]
            //   e8????????           |                     
            //   33db                 | xor                 ebx, ebx
            //   43                   | inc                 ebx
            //   53                   | push                ebx
            //   8db5dcf0ffff         | lea                 esi, [ebp - 0xf24]

        $sequence_7 = { 8d8424c0020000 50 8d842464020000 50 8d8424c8020000 50 ffd7 }
            // n = 7, score = 200
            //   8d8424c0020000       | lea                 eax, [esp + 0x2c0]
            //   50                   | push                eax
            //   8d842464020000       | lea                 eax, [esp + 0x264]
            //   50                   | push                eax
            //   8d8424c8020000       | lea                 eax, [esp + 0x2c8]
            //   50                   | push                eax
            //   ffd7                 | call                edi

        $sequence_8 = { 6a00 ff15???????? 6a10 68???????? }
            // n = 4, score = 200
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   6a10                 | push                0x10
            //   68????????           |                     

        $sequence_9 = { ffb56cf4ffff ff15???????? ffb56cf4ffff ff15???????? 83bdf4f4ffff08 8b85e0f4ffff 7306 }
            // n = 7, score = 200
            //   ffb56cf4ffff         | push                dword ptr [ebp - 0xb94]
            //   ff15????????         |                     
            //   ffb56cf4ffff         | push                dword ptr [ebp - 0xb94]
            //   ff15????????         |                     
            //   83bdf4f4ffff08       | cmp                 dword ptr [ebp - 0xb0c], 8
            //   8b85e0f4ffff         | mov                 eax, dword ptr [ebp - 0xb20]
            //   7306                 | jae                 8

    condition:
        7 of them and filesize < 212992
}
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