SYMBOLCOMMON_NAMEaka. SYNONYMS
win.slub (Back to overview)

SLUB


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References
2020-12-15Trend MicroWilliam Gamazo Sanchez
@online{sanchez:20201215:who:c723930, author = {William Gamazo Sanchez}, title = {{Who is the Threat Actor Behind Operation Earth Kitsune?}}, date = {2020-12-15}, organization = {Trend Micro}, url = {https://www.trendmicro.com/en_us/research/20/l/who-is-the-threat-actor-behind-operation-earth-kitsune-.html}, language = {English}, urldate = {2020-12-16} } Who is the Threat Actor Behind Operation Earth Kitsune?
Freenki Loader SLUB
2020-10-28Trend MicroWilliam Gamazo Sanchez, Aliakbar Zahravi, Elliot Cao, Cedric Pernet, Daniel Lunghi, Jaromír Hořejší, Joseph C Chen, John Zhang
@online{sanchez:20201028:operation:7f4b906, author = {William Gamazo Sanchez and Aliakbar Zahravi and Elliot Cao and Cedric Pernet and Daniel Lunghi and Jaromír Hořejší and Joseph C Chen and John Zhang}, title = {{Operation Earth Kitsune: A Dance of Two New Backdoors}}, date = {2020-10-28}, organization = {Trend Micro}, url = {https://www.trendmicro.com/en_us/research/20/j/operation-earth-kitsune-a-dance-of-two-new-backdoors.html}, language = {English}, urldate = {2020-10-29} } Operation Earth Kitsune: A Dance of Two New Backdoors
AgfSpy DneSpy SLUB
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 (20201023 | autogenerated rule brought to you by yara-signator)
rule win_slub_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.slub"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { ff7764 8d4774 50 6a01 e8???????? 83c418 89442430 }
            // n = 7, score = 100
            //   ff7764               | push                dword ptr [edi + 0x64]
            //   8d4774               | lea                 eax, [edi + 0x74]
            //   50                   | push                eax
            //   6a01                 | push                1
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   89442430             | mov                 dword ptr [esp + 0x30], eax

        $sequence_1 = { ff770c ff33 e8???????? 83c408 8903 85c0 7538 }
            // n = 7, score = 100
            //   ff770c               | push                dword ptr [edi + 0xc]
            //   ff33                 | push                dword ptr [ebx]
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8903                 | mov                 dword ptr [ebx], eax
            //   85c0                 | test                eax, eax
            //   7538                 | jne                 0x3a

        $sequence_2 = { 83c404 8d8da8f7ffff e8???????? 8d85a8f7ffff c745fc0e000000 50 c785a8f7ffff98488d00 }
            // n = 7, score = 100
            //   83c404               | add                 esp, 4
            //   8d8da8f7ffff         | lea                 ecx, [ebp - 0x858]
            //   e8????????           |                     
            //   8d85a8f7ffff         | lea                 eax, [ebp - 0x858]
            //   c745fc0e000000       | mov                 dword ptr [ebp - 4], 0xe
            //   50                   | push                eax
            //   c785a8f7ffff98488d00     | mov    dword ptr [ebp - 0x858], 0x8d4898

        $sequence_3 = { 57 c744241000000000 c744242000000000 8b0e 743a 8b86f4000000 8d99b0090000 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   c744241000000000     | mov                 dword ptr [esp + 0x10], 0
            //   c744242000000000     | mov                 dword ptr [esp + 0x20], 0
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   743a                 | je                  0x3c
            //   8b86f4000000         | mov                 eax, dword ptr [esi + 0xf4]
            //   8d99b0090000         | lea                 ebx, [ecx + 0x9b0]

        $sequence_4 = { e8???????? 83c404 c645fc02 8d8588f9ffff 83bd9cf9ffff08 0f438588f9ffff 85c0 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   c645fc02             | mov                 byte ptr [ebp - 4], 2
            //   8d8588f9ffff         | lea                 eax, [ebp - 0x678]
            //   83bd9cf9ffff08       | cmp                 dword ptr [ebp - 0x664], 8
            //   0f438588f9ffff       | cmovae              eax, dword ptr [ebp - 0x678]
            //   85c0                 | test                eax, eax

        $sequence_5 = { ff2485e0538900 c644240404 c644240805 eb24 c644240405 c644240805 eb18 }
            // n = 7, score = 100
            //   ff2485e0538900       | jmp                 dword ptr [eax*4 + 0x8953e0]
            //   c644240404           | mov                 byte ptr [esp + 4], 4
            //   c644240805           | mov                 byte ptr [esp + 8], 5
            //   eb24                 | jmp                 0x26
            //   c644240405           | mov                 byte ptr [esp + 4], 5
            //   c644240805           | mov                 byte ptr [esp + 8], 5
            //   eb18                 | jmp                 0x1a

        $sequence_6 = { 5f 5e 5d 8b08 8b442410 898844040000 8bc3 }
            // n = 7, score = 100
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   8b442410             | mov                 eax, dword ptr [esp + 0x10]
            //   898844040000         | mov                 dword ptr [eax + 0x444], ecx
            //   8bc3                 | mov                 eax, ebx

        $sequence_7 = { 85ff 7539 c746140f000000 837e1410 7204 8b06 eb02 }
            // n = 7, score = 100
            //   85ff                 | test                edi, edi
            //   7539                 | jne                 0x3b
            //   c746140f000000       | mov                 dword ptr [esi + 0x14], 0xf
            //   837e1410             | cmp                 dword ptr [esi + 0x14], 0x10
            //   7204                 | jb                  6
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   eb02                 | jmp                 4

        $sequence_8 = { e9???????? 83bf7c0100000b 7540 80bf8602000000 7437 68???????? 68???????? }
            // n = 7, score = 100
            //   e9????????           |                     
            //   83bf7c0100000b       | cmp                 dword ptr [edi + 0x17c], 0xb
            //   7540                 | jne                 0x42
            //   80bf8602000000       | cmp                 byte ptr [edi + 0x286], 0
            //   7437                 | je                  0x39
            //   68????????           |                     
            //   68????????           |                     

        $sequence_9 = { ff15???????? 8be8 83c404 85ed 744a 8bfe 0f1f00 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   8be8                 | mov                 ebp, eax
            //   83c404               | add                 esp, 4
            //   85ed                 | test                ebp, ebp
            //   744a                 | je                  0x4c
            //   8bfe                 | mov                 edi, esi
            //   0f1f00               | nop                 dword ptr [eax]

    condition:
        7 of them and filesize < 1785856
}
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