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 (20220411 | Detects win.flying_dutchman.)
rule win_flying_dutchman_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        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 = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 6a02 58 668945ec 8d86d4000000 50 e8???????? 59 }
            // n = 7, score = 100
            //   6a02                 | push                2
            //   58                   | pop                 eax
            //   668945ec             | mov                 word ptr [ebp - 0x14], ax
            //   8d86d4000000         | lea                 eax, dword ptr [esi + 0xd4]
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_1 = { ebd1 8bc8 c1f905 8d3c8d60e90110 8bf0 83e61f c1e606 }
            // n = 7, score = 100
            //   ebd1                 | jmp                 0xffffffd3
            //   8bc8                 | mov                 ecx, eax
            //   c1f905               | sar                 ecx, 5
            //   8d3c8d60e90110       | lea                 edi, dword ptr [ecx*4 + 0x1001e960]
            //   8bf0                 | mov                 esi, eax
            //   83e61f               | and                 esi, 0x1f
            //   c1e606               | shl                 esi, 6

        $sequence_2 = { 89442408 33c0 39442408 750c ff74240c ff15???????? }
            // n = 6, score = 100
            //   89442408             | mov                 dword ptr [esp + 8], eax
            //   33c0                 | xor                 eax, eax
            //   39442408             | cmp                 dword ptr [esp + 8], eax
            //   750c                 | jne                 0xe
            //   ff74240c             | push                dword ptr [esp + 0xc]
            //   ff15????????         |                     

        $sequence_3 = { 33ff 8db594fdffff e8???????? 6a01 }
            // n = 4, score = 100
            //   33ff                 | xor                 edi, edi
            //   8db594fdffff         | lea                 esi, dword ptr [ebp - 0x26c]
            //   e8????????           |                     
            //   6a01                 | push                1

        $sequence_4 = { 837b1410 7204 8b03 eb02 8bc3 0fb65702 }
            // n = 6, score = 100
            //   837b1410             | cmp                 dword ptr [ebx + 0x14], 0x10
            //   7204                 | jb                  6
            //   8b03                 | mov                 eax, dword ptr [ebx]
            //   eb02                 | jmp                 4
            //   8bc3                 | mov                 eax, ebx
            //   0fb65702             | movzx               edx, byte ptr [edi + 2]

        $sequence_5 = { 8b5c2414 85c0 7408 89442418 3bd8 7d27 833eff }
            // n = 7, score = 100
            //   8b5c2414             | mov                 ebx, dword ptr [esp + 0x14]
            //   85c0                 | test                eax, eax
            //   7408                 | je                  0xa
            //   89442418             | mov                 dword ptr [esp + 0x18], eax
            //   3bd8                 | cmp                 ebx, eax
            //   7d27                 | jge                 0x29
            //   833eff               | cmp                 dword ptr [esi], -1

        $sequence_6 = { 8d8580f7ffff 6a00 50 e8???????? ffb5d0fdffff b98b000000 }
            // n = 6, score = 100
            //   8d8580f7ffff         | lea                 eax, dword ptr [ebp - 0x880]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     
            //   ffb5d0fdffff         | push                dword ptr [ebp - 0x230]
            //   b98b000000           | mov                 ecx, 0x8b

        $sequence_7 = { 8d442418 50 89742420 895c241c 68???????? eb2a 57 }
            // n = 7, score = 100
            //   8d442418             | lea                 eax, dword ptr [esp + 0x18]
            //   50                   | push                eax
            //   89742420             | mov                 dword ptr [esp + 0x20], esi
            //   895c241c             | mov                 dword ptr [esp + 0x1c], ebx
            //   68????????           |                     
            //   eb2a                 | jmp                 0x2c
            //   57                   | push                edi

        $sequence_8 = { 8d45c2 53 50 e8???????? }
            // n = 4, score = 100
            //   8d45c2               | lea                 eax, dword ptr [ebp - 0x3e]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_9 = { 832600 83660400 83660800 c3 8b4b04 56 57 }
            // n = 7, score = 100
            //   832600               | and                 dword ptr [esi], 0
            //   83660400             | and                 dword ptr [esi + 4], 0
            //   83660800             | and                 dword ptr [esi + 8], 0
            //   c3                   | ret                 
            //   8b4b04               | mov                 ecx, dword ptr [ebx + 4]
            //   56                   | push                esi
            //   57                   | push                edi

    condition:
        7 of them and filesize < 276480
}
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