Actor(s): Tonto Team
There is no description at this point.
rule win_typehash_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-01-25" version = "1" description = "Detects win.typehash." 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.typehash" malpedia_rule_date = "20230124" malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686" malpedia_version = "20230125" 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 = { 8b742438 56 ff15???????? 8bb424dc120000 } // n = 4, score = 100 // 8b742438 | mov esi, dword ptr [esp + 0x38] // 56 | push esi // ff15???????? | // 8bb424dc120000 | mov esi, dword ptr [esp + 0x12dc] $sequence_1 = { 8b442418 8b0d???????? 8bf9 3bc7 7302 8bf8 } // n = 6, score = 100 // 8b442418 | mov eax, dword ptr [esp + 0x18] // 8b0d???????? | // 8bf9 | mov edi, ecx // 3bc7 | cmp eax, edi // 7302 | jae 4 // 8bf8 | mov edi, eax $sequence_2 = { 55 ffd6 8b4f54 8b742418 8bd1 8bf8 c1e902 } // n = 7, score = 100 // 55 | push ebp // ffd6 | call esi // 8b4f54 | mov ecx, dword ptr [edi + 0x54] // 8b742418 | mov esi, dword ptr [esp + 0x18] // 8bd1 | mov edx, ecx // 8bf8 | mov edi, eax // c1e902 | shr ecx, 2 $sequence_3 = { 8bc2 8bf2 c1f805 83e61f 8b0485e03d4100 8b04f0 83f8ff } // n = 7, score = 100 // 8bc2 | mov eax, edx // 8bf2 | mov esi, edx // c1f805 | sar eax, 5 // 83e61f | and esi, 0x1f // 8b0485e03d4100 | mov eax, dword ptr [eax*4 + 0x413de0] // 8b04f0 | mov eax, dword ptr [eax + esi*8] // 83f8ff | cmp eax, -1 $sequence_4 = { 6a00 50 8d4c2430 e8???????? 6a01 8d4c2450 c68424cc00000001 } // n = 7, score = 100 // 6a00 | push 0 // 50 | push eax // 8d4c2430 | lea ecx, [esp + 0x30] // e8???????? | // 6a01 | push 1 // 8d4c2450 | lea ecx, [esp + 0x50] // c68424cc00000001 | mov byte ptr [esp + 0xcc], 1 $sequence_5 = { 50 e8???????? 8bf0 83c404 3bf3 7567 ff15???????? } // n = 7, score = 100 // 50 | push eax // e8???????? | // 8bf0 | mov esi, eax // 83c404 | add esp, 4 // 3bf3 | cmp esi, ebx // 7567 | jne 0x69 // ff15???????? | $sequence_6 = { 33c0 668b03 83f8ff 74e7 3b4614 77e2 8b4e1c } // n = 7, score = 100 // 33c0 | xor eax, eax // 668b03 | mov ax, word ptr [ebx] // 83f8ff | cmp eax, -1 // 74e7 | je 0xffffffe9 // 3b4614 | cmp eax, dword ptr [esi + 0x14] // 77e2 | ja 0xffffffe4 // 8b4e1c | mov ecx, dword ptr [esi + 0x1c] $sequence_7 = { 8a4c2423 53 884c2414 8d4c2414 c68424d812000001 } // n = 5, score = 100 // 8a4c2423 | mov cl, byte ptr [esp + 0x23] // 53 | push ebx // 884c2414 | mov byte ptr [esp + 0x14], cl // 8d4c2414 | lea ecx, [esp + 0x14] // c68424d812000001 | mov byte ptr [esp + 0x12d8], 1 $sequence_8 = { 8bf7 8bfa 6800000080 c1e902 } // n = 4, score = 100 // 8bf7 | mov esi, edi // 8bfa | mov edi, edx // 6800000080 | push 0x80000000 // c1e902 | shr ecx, 2 $sequence_9 = { 7510 6a0e ff15???????? 5f 5e 5d 33c0 } // n = 7, score = 100 // 7510 | jne 0x12 // 6a0e | push 0xe // ff15???????? | // 5f | pop edi // 5e | pop esi // 5d | pop ebp // 33c0 | xor eax, eax condition: 7 of them and filesize < 180224 }
rule win_typehash_w0 { meta: author = "Jeff White (karttoon@gmail.com) @noottrak" date = "15APR2020" hash = "d81ba465fe59e7d600f7ab0e8161246a5badd8ae2c3084f76442fb49f6585e95" description = "Detects an observed Negastealer campaign payload" source = "https://github.com/karttoon/iocs/blob/899dac6045a73045baa8966a16b7402d625ee26b/Negasteal/troj_win_negasteal.yar" malpedia_rule_date = "20200817" malpedia_hash = "" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.typehash" malpedia_version = "20201007" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $s1 = "Mozilla/5.0 (Windows NT 5.2) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.122 Safari/534.30" $s2 = "news.php" $s3 = "http://%s/%s" $s4 = "type=0" $s5 = "time=%s" condition: all of them }
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