Actor(s): APT32
There is no description at this point.
rule win_salgorea_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-12-06" version = "1" description = "Detects win.salgorea." 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.salgorea" malpedia_rule_date = "20231130" malpedia_hash = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351" malpedia_version = "20230808" 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 = { 8b5c240c 53 9d 8b5c2404 } // n = 4, score = 300 // 8b5c240c | mov ebx, dword ptr [esp + 0xc] // 53 | push ebx // 9d | popfd // 8b5c2404 | mov ebx, dword ptr [esp + 4] $sequence_1 = { 51 66b9b469 66f7f1 f7da } // n = 4, score = 300 // 51 | push ecx // 66b9b469 | mov cx, 0x69b4 // 66f7f1 | div cx // f7da | neg edx $sequence_2 = { 51 6698 f7db 33d2 b889510000 b98c0b0000 } // n = 6, score = 300 // 51 | push ecx // 6698 | cbw // f7db | neg ebx // 33d2 | xor edx, edx // b889510000 | mov eax, 0x5189 // b98c0b0000 | mov ecx, 0xb8c $sequence_3 = { 66c1e303 f6d1 f8 6633d2 66b8b96a 66b9ada1 66f7f1 } // n = 7, score = 300 // 66c1e303 | shl bx, 3 // f6d1 | not cl // f8 | clc // 6633d2 | xor dx, dx // 66b8b96a | mov ax, 0x6ab9 // 66b9ada1 | mov cx, 0xa1ad // 66f7f1 | div cx $sequence_4 = { 66c1e306 80eb38 80e6ee f8 f6d1 52 40 } // n = 7, score = 300 // 66c1e306 | shl bx, 6 // 80eb38 | sub bl, 0x38 // 80e6ee | and dh, 0xee // f8 | clc // f6d1 | not cl // 52 | push edx // 40 | inc eax $sequence_5 = { 8b5c2404 f8 99 8b1424 f5 66f7d8 8b442410 } // n = 7, score = 300 // 8b5c2404 | mov ebx, dword ptr [esp + 4] // f8 | clc // 99 | cdq // 8b1424 | mov edx, dword ptr [esp] // f5 | cmc // 66f7d8 | neg ax // 8b442410 | mov eax, dword ptr [esp + 0x10] $sequence_6 = { 66c1e804 8b44240c 0fbafa00 0fbcd2 } // n = 4, score = 300 // 66c1e804 | shr ax, 4 // 8b44240c | mov eax, dword ptr [esp + 0xc] // 0fbafa00 | btc edx, 0 // 0fbcd2 | bsf edx, edx $sequence_7 = { 8b5c240c 53 d50a 48 d40a 22c9 } // n = 6, score = 300 // 8b5c240c | mov ebx, dword ptr [esp + 0xc] // 53 | push ebx // d50a | aad // 48 | dec eax // d40a | aam // 22c9 | and cl, cl $sequence_8 = { a1???????? 8945cc 8d45cc 3930 } // n = 4, score = 200 // a1???????? | // 8945cc | mov dword ptr [ebp - 0x34], eax // 8d45cc | lea eax, [ebp - 0x34] // 3930 | cmp dword ptr [eax], esi $sequence_9 = { 8d87d8010000 50 8d83d8010000 50 } // n = 4, score = 100 // 8d87d8010000 | lea eax, [edi + 0x1d8] // 50 | push eax // 8d83d8010000 | lea eax, [ebx + 0x1d8] // 50 | push eax $sequence_10 = { 8d8850040000 8d984c040000 8b4510 8b00 } // n = 4, score = 100 // 8d8850040000 | lea ecx, [eax + 0x450] // 8d984c040000 | lea ebx, [eax + 0x44c] // 8b4510 | mov eax, dword ptr [ebp + 0x10] // 8b00 | mov eax, dword ptr [eax] $sequence_11 = { 8d885c040000 8d9858040000 e9???????? 8b7508 } // n = 4, score = 100 // 8d885c040000 | lea ecx, [eax + 0x45c] // 8d9858040000 | lea ebx, [eax + 0x458] // e9???????? | // 8b7508 | mov esi, dword ptr [ebp + 8] $sequence_12 = { 8d87d8010000 50 e8???????? 59 59 85c0 } // n = 6, score = 100 // 8d87d8010000 | lea eax, [edi + 0x1d8] // 50 | push eax // e8???????? | // 59 | pop ecx // 59 | pop ecx // 85c0 | test eax, eax $sequence_13 = { 8d87d8010000 50 8d83b0020000 50 e8???????? 59 } // n = 6, score = 100 // 8d87d8010000 | lea eax, [edi + 0x1d8] // 50 | push eax // 8d83b0020000 | lea eax, [ebx + 0x2b0] // 50 | push eax // e8???????? | // 59 | pop ecx $sequence_14 = { 8d8860010000 0fb701 a801 740a } // n = 4, score = 100 // 8d8860010000 | lea ecx, [eax + 0x160] // 0fb701 | movzx eax, word ptr [ecx] // a801 | test al, 1 // 740a | je 0xc $sequence_15 = { 8d8840010000 8d9044010000 56 8b750c } // n = 4, score = 100 // 8d8840010000 | lea ecx, [eax + 0x140] // 8d9044010000 | lea edx, [eax + 0x144] // 56 | push esi // 8b750c | mov esi, dword ptr [ebp + 0xc] condition: 7 of them and filesize < 2007040 }
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