SYMBOLCOMMON_NAMEaka. SYNONYMS
win.unidentified_098 (Back to overview)

Unidentified 098 (APT29 Slack Downloader)

Actor(s): APT29


There is no description at this point.

References
2022-11-30Qianxin Threat Intelligence CenterRed Raindrop Team
@online{team:20221130:analysis:aa1ce2e, author = {Red Raindrop Team}, title = {{Analysis of APT29's attack activities against Italy}}, date = {2022-11-30}, organization = {Qianxin Threat Intelligence Center}, url = {https://ti.qianxin.com/blog/articles/analysis-of-apt29%27s-attack-activities-against-italy/}, language = {Chinese}, urldate = {2022-12-20} } Analysis of APT29's attack activities against Italy
Unidentified 098 (APT29 Slack Downloader)
2022-07-20FreebufQi Anxin Threat Intelligence Center
@online{center:20220720:abused:27d014d, author = {Qi Anxin Threat Intelligence Center}, title = {{Abused Slack Service: Analysis of APT29's Attack on Italy}}, date = {2022-07-20}, organization = {Freebuf}, url = {https://www.freebuf.com/articles/paper/339618.html}, language = {English}, urldate = {2022-10-19} } Abused Slack Service: Analysis of APT29's Attack on Italy
Unidentified 098 (APT29 Slack Downloader)
2022-07-19R136a1Dominik Reichel
@online{reichel:20220719:look:84e1e01, author = {Dominik Reichel}, title = {{A look into APT29's new early-stage Google Drive downloader}}, date = {2022-07-19}, organization = {R136a1}, url = {https://r136a1.info/2022/07/19/a-look-into-apt29s-new-early-stage-google-drive-downloader/}, language = {English}, urldate = {2022-10-19} } A look into APT29's new early-stage Google Drive downloader
BEATDROP BOOMBOX Gdrive Unidentified 098 (APT29 Slack Downloader)
2022-07-08Cert-AgIDCert-AgID
@online{certagid:20220708:il:c02e771, author = {Cert-AgID}, title = {{Il malware EnvyScout (APT29) è stato veicolato anche in Italia}}, date = {2022-07-08}, organization = {Cert-AgID}, url = {https://cert-agid.gov.it/news/il-malware-envyscout-apt29-e-stato-veicolato-anche-in-italia/}, language = {Italian}, urldate = {2022-10-19} } Il malware EnvyScout (APT29) è stato veicolato anche in Italia
EnvyScout Unidentified 098 (APT29 Slack Downloader)
Yara Rules
[TLP:WHITE] win_unidentified_098_auto (20230125 | Detects win.unidentified_098.)
rule win_unidentified_098_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.unidentified_098."
        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.unidentified_098"
        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 = { 66440fbe4801 664439c9 0f84ea050000 4c89c0 4d8d4001 4939f0 75de }
            // n = 7, score = 100
            //   66440fbe4801         | mov                 ecx, eax
            //   664439c9             | dec                 eax
            //   0f84ea050000         | mov                 eax, dword ptr [ebx]
            //   4c89c0               | dec                 eax
            //   4d8d4001             | mov                 ecx, ebx
            //   4939f0               | call                dword ptr [eax + 8]
            //   75de                 | dec                 esp

        $sequence_1 = { 664189ee 4c89fa 4889442438 4c8d442470 4c8d4c2460 488b842420010000 66895c2448 }
            // n = 7, score = 100
            //   664189ee             | dec                 eax
            //   4c89fa               | lea                 eax, [ebp + 0x28]
            //   4889442438           | dec                 esp
            //   4c8d442470           | mov                 ecx, esp
            //   4c8d4c2460           | xor                 eax, eax
            //   488b842420010000     | mov                 byte ptr [ebx + 0x162], 0
            //   66895c2448           | xor                 edx, edx

        $sequence_2 = { f0418344240801 e9???????? f0418344240801 e9???????? b918000000 e8???????? c7400800000000 }
            // n = 7, score = 100
            //   f0418344240801       | dec                 eax
            //   e9????????           |                     
            //   f0418344240801       | mov                 dword ptr [ecx + 0x30], 0
            //   e9????????           |                     
            //   b918000000           | mov                 dword ptr [ecx + 8], eax
            //   e8????????           |                     
            //   c7400800000000       | dec                 eax

        $sequence_3 = { 7415 83c301 83fb0b 75e5 31c0 4883c420 5b }
            // n = 7, score = 100
            //   7415                 | dec                 esp
            //   83c301               | mov                 eax, dword ptr [esp + 0x70]
            //   83fb0b               | mov                 byte ptr [eax + edi], 0
            //   75e5                 | dec                 eax
            //   31c0                 | mov                 edx, dword ptr [esi + 0x18]
            //   4883c420             | dec                 eax
            //   5b                   | mov                 ecx, dword ptr [esi + 0x10]

        $sequence_4 = { 80fa01 0f86d4000000 488d5001 488bbbd0000000 488dabd8000000 488993b0000000 440fb620 }
            // n = 7, score = 100
            //   80fa01               | pop                 esi
            //   0f86d4000000         | pop                 edi
            //   488d5001             | pop                 ebp
            //   488bbbd0000000       | dec                 ebp
            //   488dabd8000000       | mov                 dword ptr [esp + 8], edx
            //   488993b0000000       | dec                 edx
            //   440fb620             | lea                 eax, [ebx + ecx]

        $sequence_5 = { ff5028 488b442428 488b68e8 488d4d01 e8???????? 4531c9 4989e8 }
            // n = 7, score = 100
            //   ff5028               | test                eax, eax
            //   488b442428           | jle                 0xb4
            //   488b68e8             | mov                 eax, dword ptr [ebx]
            //   488d4d01             | dec                 eax
            //   e8????????           |                     
            //   4531c9               | mov                 ecx, dword ptr [esp + 0x40]
            //   4989e8               | test                eax, eax

        $sequence_6 = { c5f8112a c5f810ac2490000000 c5f8116a10 488b8424a0000000 48894220 83bc24800000000b 755e }
            // n = 7, score = 100
            //   c5f8112a             | inc                 sp
            //   c5f810ac2490000000     | mov    dword ptr [edx + 6], ecx
            //   c5f8116a10           | dec                 esp
            //   488b8424a0000000     | lea                 ecx, [ecx + 8]
            //   48894220             | dec                 ebp
            //   83bc24800000000b     | cmp                 eax, ecx
            //   755e                 | je                  0x3fd

        $sequence_7 = { 89c5 0f85d8000000 83ffff 0f94c0 4d85f6 7404 84c0 }
            // n = 7, score = 100
            //   89c5                 | dec                 eax
            //   0f85d8000000         | add                 eax, 2
            //   83ffff               | dec                 ecx
            //   0f94c0               | cmp                 ebp, eax
            //   4d85f6               | jne                 0xe10
            //   7404                 | cmp                 word ptr [esi + 0xb8], bx
            //   84c0                 | je                  0xe38

        $sequence_8 = { 8bb588000000 f20f10b590000000 488945d8 8b8580000000 4989cc 4c89cb 488d0d45510700 }
            // n = 7, score = 100
            //   8bb588000000         | dec                 eax
            //   f20f10b590000000     | lea                 ecx, [0xadff0]
            //   488945d8             | cmp                 dx, 0x42
            //   8b8580000000         | je                  0x860
            //   4989cc               | lea                 eax, [esi - 0x44]
            //   4c89cb               | mov                 ecx, eax
            //   488d0d45510700       | cmp                 al, 0x33

        $sequence_9 = { 750a 488d4c2420 e8???????? 4c89e1 e8???????? 488d1521e20100 b909000000 }
            // n = 7, score = 100
            //   750a                 | nop                 
            //   488d4c2420           | dec                 eax
            //   e8????????           |                     
            //   4c89e1               | mov                 ecx, dword ptr [ebx + 0x70]
            //   e8????????           |                     
            //   488d1521e20100       | movzx               ebp, word ptr [esi]
            //   b909000000           | dec                 esp

    condition:
        7 of them and filesize < 2362368
}
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