SYMBOLCOMMON_NAMEaka. SYNONYMS
win.duuzer (Back to overview)

Duuzer

aka: Escad

Actor(s): Lazarus Group


There is no description at this point.

References
2020-02-19LexfoLexfo
@techreport{lexfo:20200219:lazarus:f293c37, author = {Lexfo}, title = {{The Lazarus Constellation A study on North Korean malware}}, date = {2020-02-19}, institution = {Lexfo}, url = {https://blog.lexfo.fr/ressources/Lexfo-WhitePaper-The_Lazarus_Constellation.pdf}, language = {English}, urldate = {2020-03-11} } The Lazarus Constellation A study on North Korean malware
FastCash AppleJeus BADCALL Bankshot Brambul Dtrack Duuzer DYEPACK ELECTRICFISH HARDRAIN Hermes HOPLIGHT Joanap KEYMARBLE Kimsuky MimiKatz MyDoom NACHOCHEESE NavRAT PowerRatankba RokRAT Sierra(Alfa,Bravo, ...) Volgmer WannaCryptor
2020SecureworksSecureWorks
@online{secureworks:2020:nickel:b8eb4a4, author = {SecureWorks}, title = {{NICKEL ACADEMY}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/nickel-academy}, language = {English}, urldate = {2020-05-23} } NICKEL ACADEMY
Brambul Duuzer HOPLIGHT Joanap Sierra(Alfa,Bravo, ...) Volgmer
2017-05-22SymantecSymantec Security Response
@online{response:20170522:wannacry:f66a95e, author = {Symantec Security Response}, title = {{WannaCry: Ransomware attacks show strong links to Lazarus group}}, date = {2017-05-22}, organization = {Symantec}, url = {https://www.symantec.com/connect/blogs/wannacry-ransomware-attacks-show-strong-links-lazarus-group}, language = {English}, urldate = {2020-01-06} } WannaCry: Ransomware attacks show strong links to Lazarus group
AlphaNC BravoNC Duuzer Sierra(Alfa,Bravo, ...) WannaCryptor
2015-10-26SymantecA L Johnson
@online{johnson:20151026:duuzer:e87f194, author = {A L Johnson}, title = {{Duuzer back door Trojan targets South Korea to take over computers}}, date = {2015-10-26}, organization = {Symantec}, url = {https://community.broadcom.com/symantecenterprise/communities/community-home/librarydocuments/viewdocument?DocumentKey=5b9850b9-0fdd-48a9-b595-9234207ae7df&CommunityKey=1ecf5f55-9545-44d6-b0f4-4e4a7f5f5e68&tab=librarydocuments}, language = {English}, urldate = {2020-04-21} } Duuzer back door Trojan targets South Korea to take over computers
Brambul Duuzer Joanap Lazarus Group
Yara Rules
[TLP:WHITE] win_duuzer_auto (20221125 | Detects win.duuzer.)
rule win_duuzer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.duuzer."
        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.duuzer"
        malpedia_rule_date = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 83f804 7408 83c8ff e9???????? }
            // n = 4, score = 200
            //   83f804               | cmp                 eax, 4
            //   7408                 | je                  0xa
            //   83c8ff               | or                  eax, 0xffffffff
            //   e9????????           |                     

        $sequence_1 = { 0145f0 1155f4 85c9 7533 }
            // n = 4, score = 100
            //   0145f0               | dec                 eax
            //   1155f4               | sar                 ecx, 8
            //   85c9                 | dec                 esp
            //   7533                 | mov                 dword ptr [esp + 0x28], esi

        $sequence_2 = { 014dec 66837dec00 0f8efc010000 0fbf45ec }
            // n = 4, score = 100
            //   014dec               | mov                 dword ptr [eax], 0x2303468a
            //   66837dec00           | ror                 dword ptr [eax - 0x117cfcb9], 1
            //   0f8efc010000         | add                 dword ptr [ebx], ecx
            //   0fbf45ec             | add                 dword ptr [esi + 0x4c], ecx

        $sequence_3 = { 4c897348 488b1d???????? 4885db 7416 488b4b58 4885c9 7405 }
            // n = 7, score = 100
            //   4c897348             | dec                 esp
            //   488b1d????????       |                     
            //   4885db               | mov                 dword ptr [ebx + 0x48], esi
            //   7416                 | dec                 eax
            //   488b4b58             | test                ebx, ebx
            //   4885c9               | je                  0x1b
            //   7405                 | dec                 eax

        $sequence_4 = { 4c89742428 41b116 488bca 448bc2 }
            // n = 4, score = 100
            //   4c89742428           | cmp                 dword ptr [ecx + 0x16f4], esp
            //   41b116               | je                  0x3d2
            //   488bca               | dec                 esp
            //   448bc2               | mov                 dword ptr [esp + 0x20], esi

        $sequence_5 = { 014dec 83bf8400000000 7708 398780000000 }
            // n = 4, score = 100
            //   014dec               | cmp                 edi, ebx
            //   83bf8400000000       | jne                 0xffffffc8
            //   7708                 | mov                 eax, dword ptr [esi + 0x30]
            //   398780000000         | cmp                 eax, ebx

        $sequence_6 = { 01442410 3bfb 75c4 8b4630 }
            // n = 4, score = 100
            //   01442410             | mov                 edi, eax
            //   3bfb                 | lea                 ecx, [eax + 1]
            //   75c4                 | dec                 eax
            //   8b4630               | arpl                cx, cx

        $sequence_7 = { 00e0 3541000436 41 0023 }
            // n = 4, score = 100
            //   00e0                 | dec                 esp
            //   3541000436           | mov                 dword ptr [esp + 0x20], esi
            //   41                   | inc                 ecx
            //   0023                 | mov                 esi, 4

        $sequence_8 = { 4c897360 48894358 eb03 498bde }
            // n = 4, score = 100
            //   4c897360             | dec                 esp
            //   48894358             | mov                 dword ptr [ebx + 0x48], esi
            //   eb03                 | dec                 eax
            //   498bde               | lea                 ecx, [ebp + 0x2321]

        $sequence_9 = { 4c89742420 ff15???????? 8bf8 8d4801 }
            // n = 4, score = 100
            //   4c89742420           | lea                 eax, [esi + ebp]
            //   ff15????????         |                     
            //   8bf8                 | inc                 ecx
            //   8d4801               | mov                 eax, 0x10

        $sequence_10 = { 00f4 c640001c c740008a460323 d188470383ee }
            // n = 4, score = 100
            //   00f4                 | dec                 esp
            //   c640001c             | mov                 dword ptr [esp + 0x20], esi
            //   c740008a460323       | mov                 edi, eax
            //   d188470383ee         | lea                 ecx, [eax + 1]

        $sequence_11 = { 4c89742408 4d8bf0 488bf2 4c8bd1 418d5c2410 4439a1f4160000 0f84ba030000 }
            // n = 7, score = 100
            //   4c89742408           | mov                 ebx, esi
            //   4d8bf0               | dec                 esp
            //   488bf2               | mov                 dword ptr [ebx + 0x60], esi
            //   4c8bd1               | dec                 eax
            //   418d5c2410           | mov                 dword ptr [ebx + 0x58], eax
            //   4439a1f4160000       | jmp                 5
            //   0f84ba030000         | dec                 ecx

        $sequence_12 = { 010b 014e4c 014e48 014e54 }
            // n = 4, score = 100
            //   010b                 | dec                 eax
            //   014e4c               | arpl                cx, cx
            //   014e48               | dec                 esp
            //   014e54               | mov                 dword ptr [esp + 0x20], esi

        $sequence_13 = { 4c897348 e9???????? 488d8d21230000 33d2 }
            // n = 4, score = 100
            //   4c897348             | mov                 ecx, dword ptr [ebx + 0x58]
            //   e9????????           |                     
            //   488d8d21230000       | dec                 eax
            //   33d2                 | test                ecx, ecx

        $sequence_14 = { 4c89742420 41be04000000 4d3be6 0f86dd000000 }
            // n = 4, score = 100
            //   4c89742420           | mov                 ebx, esi
            //   41be04000000         | inc                 edx
            //   4d3be6               | lea                 eax, [esi + ebp]
            //   0f86dd000000         | dec                 esp

    condition:
        7 of them and filesize < 491520
}
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