SYMBOLCOMMON_NAMEaka. SYNONYMS
win.redshawl (Back to overview)

REDSHAWL

Actor(s): Lazarus Group


REDSHAWL is a session hijacking utility that starts a new process as another user currently logged on to the same system via command-line.

References
2018-03Kaspersky LabsKaspersky Lab
@techreport{lab:201803:lazarus:3fd5ac4, author = {Kaspersky Lab}, title = {{Lazarus under the Hood}}, date = {2018-03}, institution = {Kaspersky Labs}, url = {https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2018/03/07180244/Lazarus_Under_The_Hood_PDF_final.pdf}, language = {English}, urldate = {2020-01-07} } Lazarus under the Hood
HOTWAX REDSHAWL WORMHOLE
2018FireEyeFireEye
@online{fireeye:2018:apt38:20161b7, author = {FireEye}, title = {{APT38}}, date = {2018}, organization = {FireEye}, url = {https://content.fireeye.com/apt/rpt-apt38}, language = {English}, urldate = {2020-01-13} } APT38
Bitsran BLINDTOAD BOOTWRECK Contopee DarkComet DYEPACK HOTWAX NESTEGG PowerRatankba REDSHAWL WORMHOLE Lazarus Group
Yara Rules
[TLP:WHITE] win_redshawl_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_redshawl_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.redshawl"
        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 = { 488d8520060000 448bc6 442bc0 488b442450 488d0d3b830000 488b0cc1 44897c2444 }
            // n = 7, score = 100
            //   488d8520060000       | xor                 ebx, ebx
            //   448bc6               | dec                 eax
            //   442bc0               | mov                 edi, eax
            //   488b442450           | jne                 0x86c
            //   488d0d3b830000       | dec                 eax
            //   488b0cc1             | lea                 ecx, [0x4cff]
            //   44897c2444           | dec                 eax

        $sequence_1 = { 488d1568ba0000 413bc7 7428 83f8fe 7423 4c63c0 4c8d0d74bbffff }
            // n = 7, score = 100
            //   488d1568ba0000       | je                  0x390
            //   413bc7               | cmp                 esi, -1
            //   7428                 | jne                 0x2f2
            //   83f8fe               | dec                 eax
            //   7423                 | lea                 ecx, [esp + 0xa0]
            //   4c63c0               | mov                 dword ptr [esp + 0x40], eax
            //   4c8d0d74bbffff       | test                eax, eax

        $sequence_2 = { 488d942430010000 488d0daa9b0000 e8???????? 4c8d9c2490000000 }
            // n = 4, score = 100
            //   488d942430010000     | lea                 edx, [0x7deb]
            //   488d0daa9b0000       | dec                 eax
            //   e8????????           |                     
            //   4c8d9c2490000000     | sar                 eax, 5

        $sequence_3 = { 33db eb38 48630509daffff 488d0dc6d9ffff 4803c1 813850450000 75e3 }
            // n = 7, score = 100
            //   33db                 | je                  0xaf8
            //   eb38                 | dec                 eax
            //   48630509daffff       | mov                 eax, dword ptr [ebx + 0x110]
            //   488d0dc6d9ffff       | dec                 eax
            //   4803c1               | test                eax, eax
            //   813850450000         | je                  0xaf8
            //   75e3                 | dec                 eax

        $sequence_4 = { e8???????? 4c8d546d00 4c8d1d58c70000 49c1e204 bd04000000 }
            // n = 5, score = 100
            //   e8????????           |                     
            //   4c8d546d00           | mov                 ecx, edi
            //   4c8d1d58c70000       | dec                 eax
            //   49c1e204             | test                ebx, ebx
            //   bd04000000           | dec                 eax

        $sequence_5 = { 488d0d27c20000 e8???????? 85c0 7408 8bcb }
            // n = 5, score = 100
            //   488d0d27c20000       | mov                 byte ptr [ecx], al
            //   e8????????           |                     
            //   85c0                 | dec                 ecx
            //   7408                 | inc                 ebx
            //   8bcb                 | dec                 eax

        $sequence_6 = { 488d0d985d0000 e8???????? 488d15b45d0000 488d0da55d0000 }
            // n = 4, score = 100
            //   488d0d985d0000       | lea                 edx, [0x5db7]
            //   e8????????           |                     
            //   488d15b45d0000       | dec                 eax
            //   488d0da55d0000       | lea                 ecx, [0x5d98]

        $sequence_7 = { 90 90 8b442460 e9???????? c784242001000001000000 488b842480000000 }
            // n = 6, score = 100
            //   90                   | dec                 eax
            //   90                   | mov                 ecx, dword ptr [eax + ecx*8]
            //   8b442460             | dec                 eax
            //   e9????????           |                     
            //   c784242001000001000000     | mov    dword ptr [esp + 8], ebx
            //   488b842480000000     | dec                 eax

        $sequence_8 = { e8???????? 89442440 85c0 742f 448b8424a0000000 498bd7 488d0d4f990000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   89442440             | lea                 edx, [esp + 0x50]
            //   85c0                 | inc                 ecx
            //   742f                 | mov                 ecx, esp
            //   448b8424a0000000     | mov                 ebx, eax
            //   498bd7               | mov                 dword ptr [esp + 0x40], eax
            //   488d0d4f990000       | test                eax, eax

        $sequence_9 = { 89442460 488d150a000000 488bcc e8???????? }
            // n = 4, score = 100
            //   89442460             | xor                 ecx, ecx
            //   488d150a000000       | dec                 eax
            //   488bcc               | mov                 edx, edi
            //   e8????????           |                     

    condition:
        7 of them and filesize < 174080
}
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