Actor(s): Samurai Panda
There is no description at this point.
rule win_sykipot_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-07-11" version = "1" description = "Detects win.sykipot." 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.sykipot" 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 = { 8b94242c060000 56 8d842498000000 57 50 8b84243c060000 } // n = 6, score = 200 // 8b94242c060000 | mov edx, dword ptr [esp + 0x62c] // 56 | push esi // 8d842498000000 | lea eax, [esp + 0x98] // 57 | push edi // 50 | push eax // 8b84243c060000 | mov eax, dword ptr [esp + 0x63c] $sequence_1 = { 8d442410 83e103 f3a4 5f 5e 5b } // n = 6, score = 200 // 8d442410 | lea eax, [esp + 0x10] // 83e103 | and ecx, 3 // f3a4 | rep movsb byte ptr es:[edi], byte ptr [esi] // 5f | pop edi // 5e | pop esi // 5b | pop ebx $sequence_2 = { 5f 5e 5d b80b000000 5b 81c45c180000 } // n = 6, score = 200 // 5f | pop edi // 5e | pop esi // 5d | pop ebp // b80b000000 | mov eax, 0xb // 5b | pop ebx // 81c45c180000 | add esp, 0x185c $sequence_3 = { 8911 8b94244c060000 894104 895108 8bcd e8???????? 8b942440060000 } // n = 7, score = 200 // 8911 | mov dword ptr [ecx], edx // 8b94244c060000 | mov edx, dword ptr [esp + 0x64c] // 894104 | mov dword ptr [ecx + 4], eax // 895108 | mov dword ptr [ecx + 8], edx // 8bcd | mov ecx, ebp // e8???????? | // 8b942440060000 | mov edx, dword ptr [esp + 0x640] $sequence_4 = { eb58 397c241c 7518 a1???????? 8bd0 c1e20a 81c2???????? } // n = 7, score = 200 // eb58 | jmp 0x5a // 397c241c | cmp dword ptr [esp + 0x1c], edi // 7518 | jne 0x1a // a1???????? | // 8bd0 | mov edx, eax // c1e20a | shl edx, 0xa // 81c2???????? | $sequence_5 = { 8944240c a0???????? 894c2410 88442418 } // n = 4, score = 200 // 8944240c | mov dword ptr [esp + 0xc], eax // a0???????? | // 894c2410 | mov dword ptr [esp + 0x10], ecx // 88442418 | mov byte ptr [esp + 0x18], al $sequence_6 = { 740d 8b442424 6aff 50 ff15???????? 8b442410 8b0d???????? } // n = 7, score = 200 // 740d | je 0xf // 8b442424 | mov eax, dword ptr [esp + 0x24] // 6aff | push -1 // 50 | push eax // ff15???????? | // 8b442410 | mov eax, dword ptr [esp + 0x10] // 8b0d???????? | $sequence_7 = { 8d84248c000000 f3a4 8d8c2490010000 50 51 } // n = 5, score = 200 // 8d84248c000000 | lea eax, [esp + 0x8c] // f3a4 | rep movsb byte ptr es:[edi], byte ptr [esi] // 8d8c2490010000 | lea ecx, [esp + 0x190] // 50 | push eax // 51 | push ecx $sequence_8 = { c744241000000000 85c0 0f8e77010000 8b2d???????? 8b1d???????? be???????? } // n = 6, score = 200 // c744241000000000 | mov dword ptr [esp + 0x10], 0 // 85c0 | test eax, eax // 0f8e77010000 | jle 0x17d // 8b2d???????? | // 8b1d???????? | // be???????? | $sequence_9 = { 83e103 8844243c f3a4 b907000000 33c0 8d7c243d } // n = 6, score = 200 // 83e103 | and ecx, 3 // 8844243c | mov byte ptr [esp + 0x3c], al // f3a4 | rep movsb byte ptr es:[edi], byte ptr [esi] // b907000000 | mov ecx, 7 // 33c0 | xor eax, eax // 8d7c243d | lea edi, [esp + 0x3d] condition: 7 of them and filesize < 286720 }
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