SYMBOLCOMMON_NAMEaka. SYNONYMS
win.adhubllka (Back to overview)

Adhubllka

VTCollection    

Some Ransomware distributed by TA547 in Australia

References
2020-07-17ProofpointSherrod DeGrippo
TA547 Pivots from Ursnif Banking Trojan to Ransomware in Australian Campaign
Adhubllka
Yara Rules
[TLP:WHITE] win_adhubllka_auto (20260504 | Detects win.adhubllka.)
rule win_adhubllka_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.adhubllka."
        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.adhubllka"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 0f1007 8b7df0 660ffe6580 660fefc8 }
            // n = 4, score = 500
            //   0f1007               | movups              xmm0, xmmword ptr [edi]
            //   8b7df0               | mov                 edi, dword ptr [ebp - 0x10]
            //   660ffe6580           | paddd               xmm4, xmmword ptr [ebp - 0x80]
            //   660fefc8             | pxor                xmm1, xmm0

        $sequence_1 = { 83473001 7503 ff4734 837de840 0f86b1000000 }
            // n = 5, score = 500
            //   83473001             | add                 dword ptr [edi + 0x30], 1
            //   7503                 | jne                 5
            //   ff4734               | inc                 dword ptr [edi + 0x34]
            //   837de840             | cmp                 dword ptr [ebp - 0x18], 0x40
            //   0f86b1000000         | jbe                 0xb7

        $sequence_2 = { 85c0 740e 50 e8???????? 83a668b3410000 59 83c604 }
            // n = 7, score = 500
            //   85c0                 | test                eax, eax
            //   740e                 | je                  0x10
            //   50                   | push                eax
            //   e8????????           |                     
            //   83a668b3410000       | and                 dword ptr [esi + 0x41b368], 0
            //   59                   | pop                 ecx
            //   83c604               | add                 esi, 4

        $sequence_3 = { 6bd738 8b0c8d68b34100 c644112800 85f6 740c 56 }
            // n = 6, score = 500
            //   6bd738               | imul                edx, edi, 0x38
            //   8b0c8d68b34100       | mov                 ecx, dword ptr [ecx*4 + 0x41b368]
            //   c644112800           | mov                 byte ptr [ecx + edx + 0x28], 0
            //   85f6                 | test                esi, esi
            //   740c                 | je                  0xe
            //   56                   | push                esi

        $sequence_4 = { 56 50 8b459c 03c7 50 e8???????? 8b4da4 }
            // n = 7, score = 500
            //   56                   | push                esi
            //   50                   | push                eax
            //   8b459c               | mov                 eax, dword ptr [ebp - 0x64]
            //   03c7                 | add                 eax, edi
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b4da4               | mov                 ecx, dword ptr [ebp - 0x5c]

        $sequence_5 = { 8d040f 894dc8 8b4db0 c1c80e 33c2 8945b4 8945bc }
            // n = 7, score = 500
            //   8d040f               | lea                 eax, [edi + ecx]
            //   894dc8               | mov                 dword ptr [ebp - 0x38], ecx
            //   8b4db0               | mov                 ecx, dword ptr [ebp - 0x50]
            //   c1c80e               | ror                 eax, 0xe
            //   33c2                 | xor                 eax, edx
            //   8945b4               | mov                 dword ptr [ebp - 0x4c], eax
            //   8945bc               | mov                 dword ptr [ebp - 0x44], eax

        $sequence_6 = { e8???????? 0f108528feffff 8d9538fdffff 8d8d28feffff 0f118538fdffff 0f108538feffff 0f118548fdffff }
            // n = 7, score = 500
            //   e8????????           |                     
            //   0f108528feffff       | movups              xmm0, xmmword ptr [ebp - 0x1d8]
            //   8d9538fdffff         | lea                 edx, [ebp - 0x2c8]
            //   8d8d28feffff         | lea                 ecx, [ebp - 0x1d8]
            //   0f118538fdffff       | movups              xmmword ptr [ebp - 0x2c8], xmm0
            //   0f108538feffff       | movups              xmm0, xmmword ptr [ebp - 0x1c8]
            //   0f118548fdffff       | movups              xmmword ptr [ebp - 0x2b8], xmm0

        $sequence_7 = { e9???????? 6a00 6a00 6a00 50 ff15???????? 8bb598fdffff }
            // n = 7, score = 500
            //   e9????????           |                     
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bb598fdffff         | mov                 esi, dword ptr [ebp - 0x268]

        $sequence_8 = { 83ff40 725c 8b45ac 8b4d9c 0f1006 8b559c 0f105610 }
            // n = 7, score = 500
            //   83ff40               | cmp                 edi, 0x40
            //   725c                 | jb                  0x5e
            //   8b45ac               | mov                 eax, dword ptr [ebp - 0x54]
            //   8b4d9c               | mov                 ecx, dword ptr [ebp - 0x64]
            //   0f1006               | movups              xmm0, xmmword ptr [esi]
            //   8b559c               | mov                 edx, dword ptr [ebp - 0x64]
            //   0f105610             | movups              xmm2, xmmword ptr [esi + 0x10]

        $sequence_9 = { e8???????? 0f1085fcfcffff 0f1185c4feffff 0f10850cfdffff 8b9d1cfbffff 8d85c4feffff }
            // n = 6, score = 500
            //   e8????????           |                     
            //   0f1085fcfcffff       | movups              xmm0, xmmword ptr [ebp - 0x304]
            //   0f1185c4feffff       | movups              xmmword ptr [ebp - 0x13c], xmm0
            //   0f10850cfdffff       | movups              xmm0, xmmword ptr [ebp - 0x2f4]
            //   8b9d1cfbffff         | mov                 ebx, dword ptr [ebp - 0x4e4]
            //   8d85c4feffff         | lea                 eax, [ebp - 0x13c]

    condition:
        7 of them and filesize < 253952
}
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