SYMBOLCOMMON_NAMEaka. SYNONYMS
win.flying_dutchman (Back to overview)

FlyingDutchman

Actor(s): Calypso group


There is no description at this point.

References
2019-10-31PTSecurityPTSecurity
@online{ptsecurity:20191031:calypso:adaf761, author = {PTSecurity}, title = {{Calypso APT: new group attacking state institutions}}, date = {2019-10-31}, organization = {PTSecurity}, url = {https://www.ptsecurity.com/ww-en/analytics/calypso-apt-2019/}, language = {English}, urldate = {2020-01-12} } Calypso APT: new group attacking state institutions
BYEBY FlyingDutchman Hussar PlugX
Yara Rules
[TLP:WHITE] win_flying_dutchman_auto (20210616 | Detects win.flying_dutchman.)
rule win_flying_dutchman_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.flying_dutchman."
        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.flying_dutchman"
        malpedia_rule_date = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 83f911 770e 6a0d 58 5d c3 8b04cd94b00110 }
            // n = 7, score = 100
            //   83f911               | cmp                 ecx, 0x11
            //   770e                 | ja                  0x10
            //   6a0d                 | push                0xd
            //   58                   | pop                 eax
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   8b04cd94b00110       | mov                 eax, dword ptr [ecx*8 + 0x1001b094]

        $sequence_1 = { 81ecc8000000 a1???????? 33c5 8945fc 8d8538ffffff 50 ff15???????? }
            // n = 7, score = 100
            //   81ecc8000000         | sub                 esp, 0xc8
            //   a1????????           |                     
            //   33c5                 | xor                 eax, ebp
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8d8538ffffff         | lea                 eax, dword ptr [ebp - 0xc8]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_2 = { 33f6 89b56cffffff 6a76 8d8578ffffff 397d0c 7407 681ba40000 }
            // n = 7, score = 100
            //   33f6                 | xor                 esi, esi
            //   89b56cffffff         | mov                 dword ptr [ebp - 0x94], esi
            //   6a76                 | push                0x76
            //   8d8578ffffff         | lea                 eax, dword ptr [ebp - 0x88]
            //   397d0c               | cmp                 dword ptr [ebp + 0xc], edi
            //   7407                 | je                  9
            //   681ba40000           | push                0xa41b

        $sequence_3 = { 3bde 742d 57 68ff010f00 ff7508 }
            // n = 5, score = 100
            //   3bde                 | cmp                 ebx, esi
            //   742d                 | je                  0x2f
            //   57                   | push                edi
            //   68ff010f00           | push                0xf01ff
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_4 = { 6a20 b8???????? e8???????? 33f6 8975d4 8975d8 }
            // n = 6, score = 100
            //   6a20                 | push                0x20
            //   b8????????           |                     
            //   e8????????           |                     
            //   33f6                 | xor                 esi, esi
            //   8975d4               | mov                 dword ptr [ebp - 0x2c], esi
            //   8975d8               | mov                 dword ptr [ebp - 0x28], esi

        $sequence_5 = { 3bfb 7531 6a14 e8???????? 8bf0 59 }
            // n = 6, score = 100
            //   3bfb                 | cmp                 edi, ebx
            //   7531                 | jne                 0x33
            //   6a14                 | push                0x14
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   59                   | pop                 ecx

        $sequence_6 = { 8bc6 50 8d855cfdffff 68???????? 50 e8???????? 83c40c }
            // n = 7, score = 100
            //   8bc6                 | mov                 eax, esi
            //   50                   | push                eax
            //   8d855cfdffff         | lea                 eax, dword ptr [ebp - 0x2a4]
            //   68????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_7 = { 6a00 57 eb37 8d8524fdffff 50 8d8534ffffff }
            // n = 6, score = 100
            //   6a00                 | push                0
            //   57                   | push                edi
            //   eb37                 | jmp                 0x39
            //   8d8524fdffff         | lea                 eax, dword ptr [ebp - 0x2dc]
            //   50                   | push                eax
            //   8d8534ffffff         | lea                 eax, dword ptr [ebp - 0xcc]

        $sequence_8 = { 83c40c 6a18 e8???????? 59 3bc3 7415 8918 }
            // n = 7, score = 100
            //   83c40c               | add                 esp, 0xc
            //   6a18                 | push                0x18
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   3bc3                 | cmp                 eax, ebx
            //   7415                 | je                  0x17
            //   8918                 | mov                 dword ptr [eax], ebx

        $sequence_9 = { 7503 57 ffd6 6a02 8d442414 50 57 }
            // n = 7, score = 100
            //   7503                 | jne                 5
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   6a02                 | push                2
            //   8d442414             | lea                 eax, dword ptr [esp + 0x14]
            //   50                   | push                eax
            //   57                   | push                edi

    condition:
        7 of them and filesize < 276480
}
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