Some Ransomware distributed by TA547 in Australia
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 }
If your designated proposal does not fit in any other category, feel free to write a free-text in the comment field below. Changes regarding references should be proposed on the Malpedia library page.
Your suggestion will be reviewed before being published. Thank you for contributing!
YYYY-MM-DD
YYYY-MM
YYYY