SYMBOLCOMMON_NAMEaka. SYNONYMS
win.slub (Back to overview)

SLUB


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References
2020-10-19Trend MicroNelson William Gamazo Sanchez, Aliakbar Zahravi, John Zhang, Eliot Cao, Cedric Pernet, Daniel Lunghi, Jaromír Hořejší, Joseph C. Chen
@techreport{sanchez:20201019:operation:e613dd2, author = {Nelson William Gamazo Sanchez and Aliakbar Zahravi and John Zhang and Eliot Cao and Cedric Pernet and Daniel Lunghi and Jaromír Hořejší and Joseph C. Chen}, title = {{Operation Earth Kitsune: Tracking SLUB’s Current Operations}}, date = {2020-10-19}, institution = {Trend Micro}, url = {https://documents.trendmicro.com/assets/white_papers/wp-operation-earth-kitsune.pdf}, language = {English}, urldate = {2020-10-21} } Operation Earth Kitsune: Tracking SLUB’s Current Operations
SLUB
2019-10-02Virus BulletinDaniel Lunghi, Jaromír Hořejší
@techreport{lunghi:20191002:abusing:3c9a1b7, author = {Daniel Lunghi and Jaromír Hořejší}, title = {{Abusing third-party cloud services in targeted attacks}}, date = {2019-10-02}, institution = {Virus Bulletin}, url = {https://www.virusbulletin.com/uploads/pdf/conference_slides/2019/VB2019-LunghiHorejsi.pdf}, language = {English}, urldate = {2020-01-13} } Abusing third-party cloud services in targeted attacks
BadNews SLUB
2019-03-07Trend MicroCedric Pernet, Daniel Lunghi, Jaromír Hořejší, Joseph Chen
@online{pernet:20190307:new:593e5b1, author = {Cedric Pernet and Daniel Lunghi and Jaromír Hořejší and Joseph Chen}, title = {{New SLUB Backdoor Uses GitHub, Communicates via Slack}}, date = {2019-03-07}, organization = {Trend Micro}, url = {https://blog.trendmicro.com/trendlabs-security-intelligence/new-slub-backdoor-uses-github-communicates-via-slack/}, language = {English}, urldate = {2019-10-18} } New SLUB Backdoor Uses GitHub, Communicates via Slack
SLUB
Yara Rules
[TLP:WHITE] win_slub_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_slub_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.slub"
        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 = { eb0c 8b4c2438 8b54243c 894c2438 8b44241c 0b442444 8954242c }
            // n = 7, score = 100
            //   eb0c                 | jmp                 0xe
            //   8b4c2438             | mov                 ecx, dword ptr [esp + 0x38]
            //   8b54243c             | mov                 edx, dword ptr [esp + 0x3c]
            //   894c2438             | mov                 dword ptr [esp + 0x38], ecx
            //   8b44241c             | mov                 eax, dword ptr [esp + 0x1c]
            //   0b442444             | or                  eax, dword ptr [esp + 0x44]
            //   8954242c             | mov                 dword ptr [esp + 0x2c], edx

        $sequence_1 = { 03e8 b80b000000 2bc2 8944242c eb29 894c242c 83f90c }
            // n = 7, score = 100
            //   03e8                 | add                 ebp, eax
            //   b80b000000           | mov                 eax, 0xb
            //   2bc2                 | sub                 eax, edx
            //   8944242c             | mov                 dword ptr [esp + 0x2c], eax
            //   eb29                 | jmp                 0x2b
            //   894c242c             | mov                 dword ptr [esp + 0x2c], ecx
            //   83f90c               | cmp                 ecx, 0xc

        $sequence_2 = { e9???????? 8b4dcc 83c12c e9???????? 8b4dcc 83c148 e9???????? }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8b4dcc               | mov                 ecx, dword ptr [ebp - 0x34]
            //   83c12c               | add                 ecx, 0x2c
            //   e9????????           |                     
            //   8b4dcc               | mov                 ecx, dword ptr [ebp - 0x34]
            //   83c148               | add                 ecx, 0x48
            //   e9????????           |                     

        $sequence_3 = { 83bfac010000ff 0f45d6 390c3a 7408 8bb778020000 eb06 8bb750020000 }
            // n = 7, score = 100
            //   83bfac010000ff       | cmp                 dword ptr [edi + 0x1ac], -1
            //   0f45d6               | cmovne              edx, esi
            //   390c3a               | cmp                 dword ptr [edx + edi], ecx
            //   7408                 | je                  0xa
            //   8bb778020000         | mov                 esi, dword ptr [edi + 0x278]
            //   eb06                 | jmp                 8
            //   8bb750020000         | mov                 esi, dword ptr [edi + 0x250]

        $sequence_4 = { ffd0 834f7008 884748 c707feffffff e9???????? c7476801000000 c7476c00000000 }
            // n = 7, score = 100
            //   ffd0                 | call                eax
            //   834f7008             | or                  dword ptr [edi + 0x70], 8
            //   884748               | mov                 byte ptr [edi + 0x48], al
            //   c707feffffff         | mov                 dword ptr [edi], 0xfffffffe
            //   e9????????           |                     
            //   c7476801000000       | mov                 dword ptr [edi + 0x68], 1
            //   c7476c00000000       | mov                 dword ptr [edi + 0x6c], 0

        $sequence_5 = { 83c40c ffb504ffffff 56 6aff ffb5f8feffff 6a01 6a00 }
            // n = 7, score = 100
            //   83c40c               | add                 esp, 0xc
            //   ffb504ffffff         | push                dword ptr [ebp - 0xfc]
            //   56                   | push                esi
            //   6aff                 | push                -1
            //   ffb5f8feffff         | push                dword ptr [ebp - 0x108]
            //   6a01                 | push                1
            //   6a00                 | push                0

        $sequence_6 = { ff15???????? 83ec08 8d8da0f8ffff e8???????? 68???????? 51 68???????? }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   83ec08               | sub                 esp, 8
            //   8d8da0f8ffff         | lea                 ecx, [ebp - 0x760]
            //   e8????????           |                     
            //   68????????           |                     
            //   51                   | push                ecx
            //   68????????           |                     

        $sequence_7 = { eb02 33f6 8d45d8 8975d8 50 8bcf e8???????? }
            // n = 7, score = 100
            //   eb02                 | jmp                 4
            //   33f6                 | xor                 esi, esi
            //   8d45d8               | lea                 eax, [ebp - 0x28]
            //   8975d8               | mov                 dword ptr [ebp - 0x28], esi
            //   50                   | push                eax
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     

        $sequence_8 = { e8???????? 8d853cffffff c745fc00000000 68???????? 50 e8???????? 83c408 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8d853cffffff         | lea                 eax, [ebp - 0xc4]
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   68????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8

        $sequence_9 = { 8bce e8???????? 83ec18 89a55cfbffff 8bcc 85c0 7510 }
            // n = 7, score = 100
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   83ec18               | sub                 esp, 0x18
            //   89a55cfbffff         | mov                 dword ptr [ebp - 0x4a4], esp
            //   8bcc                 | mov                 ecx, esp
            //   85c0                 | test                eax, eax
            //   7510                 | jne                 0x12

    condition:
        7 of them and filesize < 1785856
}
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