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rule win_tabmsgsql_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2026-09-17" version = "1" description = "Detects win.tabmsgsql." 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.tabmsgsql" malpedia_rule_date = "20260916" malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6" malpedia_version = "20260917" 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 = { ffd6 8d842408010000 68???????? 50 ffd6 8d4c2404 6804010000 } // n = 7, score = 100 // ffd6 | call esi // 8d842408010000 | lea eax, [esp + 0x108] // 68???????? | // 50 | push eax // ffd6 | call esi // 8d4c2404 | lea ecx, [esp + 4] // 6804010000 | push 0x104 $sequence_1 = { 0500008000 0d40004004 84c9 7505 0d00002000 8b4e18 } // n = 6, score = 100 // 0500008000 | add eax, 0x800000 // 0d40004004 | or eax, 0x4400040 // 84c9 | test cl, cl // 7505 | jne 7 // 0d00002000 | or eax, 0x200000 // 8b4e18 | mov ecx, dword ptr [esi + 0x18] $sequence_2 = { 8dbdc803feff 83c9ff f2ae f7d1 68???????? } // n = 5, score = 100 // 8dbdc803feff | lea edi, [ebp - 0x1fc38] // 83c9ff | or ecx, 0xffffffff // f2ae | repne scasb al, byte ptr es:[edi] // f7d1 | not ecx // 68???????? | $sequence_3 = { 7477 8d4c2410 51 68???????? } // n = 4, score = 100 // 7477 | je 0x79 // 8d4c2410 | lea ecx, [esp + 0x10] // 51 | push ecx // 68???????? | $sequence_4 = { 89442418 0f8da6000000 8b460c 8d4c2428 8d542414 51 52 } // n = 7, score = 100 // 89442418 | mov dword ptr [esp + 0x18], eax // 0f8da6000000 | jge 0xac // 8b460c | mov eax, dword ptr [esi + 0xc] // 8d4c2428 | lea ecx, [esp + 0x28] // 8d542414 | lea edx, [esp + 0x14] // 51 | push ecx // 52 | push edx $sequence_5 = { 668945ed 8845ef e8???????? 8b35???????? 8d55dc 68???????? 52 } // n = 7, score = 100 // 668945ed | mov word ptr [ebp - 0x13], ax // 8845ef | mov byte ptr [ebp - 0x11], al // e8???????? | // 8b35???????? | // 8d55dc | lea edx, [ebp - 0x24] // 68???????? | // 52 | push edx $sequence_6 = { 894c241c 8b2d???????? 8d4c2428 68???????? } // n = 4, score = 100 // 894c241c | mov dword ptr [esp + 0x1c], ecx // 8b2d???????? | // 8d4c2428 | lea ecx, [esp + 0x28] // 68???????? | $sequence_7 = { 83d8ff 85c0 750d 8d44240c 50 e8???????? 83c404 } // n = 7, score = 100 // 83d8ff | sbb eax, -1 // 85c0 | test eax, eax // 750d | jne 0xf // 8d44240c | lea eax, [esp + 0xc] // 50 | push eax // e8???????? | // 83c404 | add esp, 4 $sequence_8 = { 68???????? ff15???????? 83c404 a1???????? 50 ff15???????? b940000000 } // n = 7, score = 100 // 68???????? | // ff15???????? | // 83c404 | add esp, 4 // a1???????? | // 50 | push eax // ff15???????? | // b940000000 | mov ecx, 0x40 $sequence_9 = { 50 51 e8???????? 83c420 eb53 } // n = 5, score = 100 // 50 | push eax // 51 | push ecx // e8???????? | // 83c420 | add esp, 0x20 // eb53 | jmp 0x55 condition: 7 of them and filesize < 163840 }
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