Actor(s): APT28
There is no description at this point.
rule win_fusiondrive_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-07-11" version = "1" description = "Detects win.fusiondrive." 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.fusiondrive" 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 = { 49895108 d3e8 41894118 0fb60a 83e10f 4a0fbe8411a8150100 } // n = 6, score = 100 // 49895108 | inc eax // d3e8 | xor bh, bh // 41894118 | inc ecx // 0fb60a | mov eax, 0x104 // 83e10f | dec eax // 4a0fbe8411a8150100 | lea edx, [ebp - 0x70] $sequence_1 = { 3bc6 752c 897c2420 4c8d4c2460 4d8bc5 ba02000000 488b8c2488000000 } // n = 7, score = 100 // 3bc6 | inc ecx // 752c | xor word ptr [edx], ax // 897c2420 | dec eax // 4c8d4c2460 | lea edx, [edx + 2] // 4d8bc5 | dec eax // ba02000000 | lea edx, [0x13389] // 488b8c2488000000 | dec eax $sequence_2 = { ff25???????? ff25???????? 4883611000 488d056cec0000 48894108 488d0551ec0000 } // n = 6, score = 100 // ff25???????? | // ff25???????? | // 4883611000 | lea edx, [0xb637] // 488d056cec0000 | mov ecx, 3 // 48894108 | dec esp // 488d0551ec0000 | lea eax, [0xb623] $sequence_3 = { 4883c118 e9???????? 488b8a38000000 4883c120 e9???????? 488d8a68000000 e9???????? } // n = 7, score = 100 // 4883c118 | dec eax // e9???????? | // 488b8a38000000 | lea edx, [0xb69a] // 4883c120 | mov ebx, edx // e9???????? | // 488d8a68000000 | dec esp // e9???????? | $sequence_4 = { b201 488bcb e8???????? 488d4d88 e8???????? 488d1543530100 488d4d88 } // n = 7, score = 100 // b201 | mov ecx, dword ptr [esp + 0x88] // 488bcb | jne 0x3cb // e8???????? | // 488d4d88 | inc esp // e8???????? | // 488d1543530100 | lea eax, [ebx + 7] // 488d4d88 | dec ecx $sequence_5 = { 48890d???????? e8???????? 4c8d0db9330100 4c8bc0 b201 } // n = 5, score = 100 // 48890d???????? | // e8???????? | // 4c8d0db9330100 | jae 0x245 // 4c8bc0 | dec esp // b201 | mov edi, dword ptr [ebp - 0x58] $sequence_6 = { 488d442470 4889442428 897c2420 4533c9 } // n = 4, score = 100 // 488d442470 | mov dword ptr [ebp - 0x10], eax // 4889442428 | dec eax // 897c2420 | lea edx, [0x95f4] // 4533c9 | mov eax, 5 $sequence_7 = { e8???????? 488d4d88 e8???????? 488d1543530100 488d4d88 e8???????? } // n = 6, score = 100 // e8???????? | // 488d4d88 | lea ecx, [esp + 0x60] // e8???????? | // 488d1543530100 | dec eax // 488d4d88 | mov ecx, dword ptr [esp + 0x98] // e8???????? | $sequence_8 = { 776a e8???????? 85c0 7428 85db 7524 488d0d92a30100 } // n = 7, score = 100 // 776a | mov eax, dword ptr [ecx + 0x1e020] // e8???????? | // 85c0 | dec ebp // 7428 | cmovae ecx, edi // 85db | dec eax // 7524 | lea edi, [esp + 0x20] // 488d0d92a30100 | dec ecx $sequence_9 = { 428a8c01b8150100 482bd0 8b42fc d3e8 41894720 488d4204 49895708 } // n = 7, score = 100 // 428a8c01b8150100 | dec eax // 482bd0 | mov dword ptr [ebp + 0x1a0], eax // 8b42fc | inc eax // d3e8 | xor bh, bh // 41894720 | dec eax // 488d4204 | lea esi, [ebx + 0x128] // 49895708 | mov ebp, 6 condition: 7 of them and filesize < 290816 }
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