Actor(s): APT37
There is no description at this point.
rule win_poohmilk_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-03-28" version = "1" description = "Detects win.poohmilk." 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.poohmilk" malpedia_rule_date = "20230328" malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d" malpedia_version = "20230407" 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 = { 8d85ecfdffff 50 ffd7 8d8dc8fbffff 51 8d95ecfdffff } // n = 6, score = 200 // 8d85ecfdffff | lea eax, [ebp - 0x214] // 50 | push eax // ffd7 | call edi // 8d8dc8fbffff | lea ecx, [ebp - 0x438] // 51 | push ecx // 8d95ecfdffff | lea edx, [ebp - 0x214] $sequence_1 = { 3b8de4efffff 7405 83f901 7577 8b502a } // n = 5, score = 200 // 3b8de4efffff | cmp ecx, dword ptr [ebp - 0x101c] // 7405 | je 7 // 83f901 | cmp ecx, 1 // 7577 | jne 0x79 // 8b502a | mov edx, dword ptr [eax + 0x2a] $sequence_2 = { 8d8decfdffff 51 898598fbffff ffd3 8b3d???????? 68???????? } // n = 6, score = 200 // 8d8decfdffff | lea ecx, [ebp - 0x214] // 51 | push ecx // 898598fbffff | mov dword ptr [ebp - 0x468], eax // ffd3 | call ebx // 8b3d???????? | // 68???????? | $sequence_3 = { 0f84d3000000 33d2 668910 8d85d4f9ffff } // n = 4, score = 200 // 0f84d3000000 | je 0xd9 // 33d2 | xor edx, edx // 668910 | mov word ptr [eax], dx // 8d85d4f9ffff | lea eax, [ebp - 0x62c] $sequence_4 = { 837e3800 7418 837e1000 7612 837e1401 750c } // n = 6, score = 200 // 837e3800 | cmp dword ptr [esi + 0x38], 0 // 7418 | je 0x1a // 837e1000 | cmp dword ptr [esi + 0x10], 0 // 7612 | jbe 0x14 // 837e1401 | cmp dword ptr [esi + 0x14], 1 // 750c | jne 0xe $sequence_5 = { 898588d2ffff 898d7cd2ffff 898d80d2ffff 898d74d2ffff 898d78d2ffff 3bd9 } // n = 6, score = 200 // 898588d2ffff | mov dword ptr [ebp - 0x2d78], eax // 898d7cd2ffff | mov dword ptr [ebp - 0x2d84], ecx // 898d80d2ffff | mov dword ptr [ebp - 0x2d80], ecx // 898d74d2ffff | mov dword ptr [ebp - 0x2d8c], ecx // 898d78d2ffff | mov dword ptr [ebp - 0x2d88], ecx // 3bd9 | cmp ebx, ecx $sequence_6 = { 0f8574020000 0fb79d02f0ffff 0fb79500f0ffff 895e10 3bda 0f855b020000 } // n = 6, score = 200 // 0f8574020000 | jne 0x27a // 0fb79d02f0ffff | movzx ebx, word ptr [ebp - 0xffe] // 0fb79500f0ffff | movzx edx, word ptr [ebp - 0x1000] // 895e10 | mov dword ptr [esi + 0x10], ebx // 3bda | cmp ebx, edx // 0f855b020000 | jne 0x261 $sequence_7 = { 7323 8b470c 8b5628 51 } // n = 4, score = 200 // 7323 | jae 0x25 // 8b470c | mov eax, dword ptr [edi + 0xc] // 8b5628 | mov edx, dword ptr [esi + 0x28] // 51 | push ecx $sequence_8 = { 668910 8d85d4f9ffff 6a3e 50 e8???????? 83c408 } // n = 6, score = 200 // 668910 | mov word ptr [eax], dx // 8d85d4f9ffff | lea eax, [ebp - 0x62c] // 6a3e | push 0x3e // 50 | push eax // e8???????? | // 83c408 | add esp, 8 $sequence_9 = { 33c0 894610 894614 894618 89461c 8b4620 8b4f28 } // n = 7, score = 200 // 33c0 | xor eax, eax // 894610 | mov dword ptr [esi + 0x10], eax // 894614 | mov dword ptr [esi + 0x14], eax // 894618 | mov dword ptr [esi + 0x18], eax // 89461c | mov dword ptr [esi + 0x1c], eax // 8b4620 | mov eax, dword ptr [esi + 0x20] // 8b4f28 | mov ecx, dword ptr [edi + 0x28] condition: 7 of them and filesize < 245760 }
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