Actor(s): APT 30
There is no description at this point.
rule win_milkmaid_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-07-11" version = "1" description = "Detects win.milkmaid." 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.milkmaid" malpedia_rule_date = "20230705" malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41" malpedia_version = "20230715" 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 = { 6aff 68???????? 50 b8c8280100 } // n = 4, score = 100 // 6aff | push -1 // 68???????? | // 50 | push eax // b8c8280100 | mov eax, 0x128c8 $sequence_1 = { 8d4c2414 889c24dc280100 e8???????? 8d4c240c c78424dc280100ffffffff e8???????? } // n = 6, score = 100 // 8d4c2414 | lea ecx, [esp + 0x14] // 889c24dc280100 | mov byte ptr [esp + 0x128dc], bl // e8???????? | // 8d4c240c | lea ecx, [esp + 0xc] // c78424dc280100ffffffff | mov dword ptr [esp + 0x128dc], 0xffffffff // e8???????? | $sequence_2 = { 8d442408 57 50 e8???????? 83c404 33db 68???????? } // n = 7, score = 100 // 8d442408 | lea eax, [esp + 8] // 57 | push edi // 50 | push eax // e8???????? | // 83c404 | add esp, 4 // 33db | xor ebx, ebx // 68???????? | $sequence_3 = { 83ec2c 55 8be9 896c2420 8a8528280100 } // n = 5, score = 100 // 83ec2c | sub esp, 0x2c // 55 | push ebp // 8be9 | mov ebp, ecx // 896c2420 | mov dword ptr [esp + 0x20], ebp // 8a8528280100 | mov al, byte ptr [ebp + 0x12828] $sequence_4 = { 53 53 8d4c2434 89542454 c784248400000001000000 66899c2488000000 } // n = 6, score = 100 // 53 | push ebx // 53 | push ebx // 8d4c2434 | lea ecx, [esp + 0x34] // 89542454 | mov dword ptr [esp + 0x54], edx // c784248400000001000000 | mov dword ptr [esp + 0x84], 1 // 66899c2488000000 | mov word ptr [esp + 0x88], bx $sequence_5 = { 8d4c2408 e8???????? 8b442404 6a00 50 } // n = 5, score = 100 // 8d4c2408 | lea ecx, [esp + 8] // e8???????? | // 8b442404 | mov eax, dword ptr [esp + 4] // 6a00 | push 0 // 50 | push eax $sequence_6 = { 50 53 ff15???????? 8d4c2478 c68424dc28010002 e8???????? } // n = 6, score = 100 // 50 | push eax // 53 | push ebx // ff15???????? | // 8d4c2478 | lea ecx, [esp + 0x78] // c68424dc28010002 | mov byte ptr [esp + 0x128dc], 2 // e8???????? | $sequence_7 = { 64892500000000 e8???????? 53 56 8d442408 } // n = 5, score = 100 // 64892500000000 | mov dword ptr fs:[0], esp // e8???????? | // 53 | push ebx // 56 | push esi // 8d442408 | lea eax, [esp + 8] condition: 7 of them and filesize < 65536 }
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