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rule win_adkoob_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2022-04-08" version = "1" description = "Detects win.adkoob." 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.adkoob" malpedia_rule_date = "20220405" malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a" malpedia_version = "20220411" 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 = { ff75e4 8bce 8818 e8???????? 8bf3 8d4de4 e8???????? } // n = 7, score = 400 // ff75e4 | push dword ptr [ebp - 0x1c] // 8bce | mov ecx, esi // 8818 | mov byte ptr [eax], bl // e8???????? | // 8bf3 | mov esi, ebx // 8d4de4 | lea ecx, dword ptr [ebp - 0x1c] // e8???????? | $sequence_1 = { e8???????? 8b8c24e4000000 5f 5e 5b 33cc e8???????? } // n = 7, score = 400 // e8???????? | // 8b8c24e4000000 | mov ecx, dword ptr [esp + 0xe4] // 5f | pop edi // 5e | pop esi // 5b | pop ebx // 33cc | xor ecx, esp // e8???????? | $sequence_2 = { e8???????? 8bf8 897dc0 85ff 0f849b0c0000 807b1200 7507 } // n = 7, score = 400 // e8???????? | // 8bf8 | mov edi, eax // 897dc0 | mov dword ptr [ebp - 0x40], edi // 85ff | test edi, edi // 0f849b0c0000 | je 0xca1 // 807b1200 | cmp byte ptr [ebx + 0x12], 0 // 7507 | jne 9 $sequence_3 = { ff75f8 e8???????? e9???????? 8b16 85d2 0f8431ffffff 8b4608 } // n = 7, score = 400 // ff75f8 | push dword ptr [ebp - 8] // e8???????? | // e9???????? | // 8b16 | mov edx, dword ptr [esi] // 85d2 | test edx, edx // 0f8431ffffff | je 0xffffff37 // 8b4608 | mov eax, dword ptr [esi + 8] $sequence_4 = { e8???????? 8bd6 8d4d80 e8???????? 83c41c 50 8bcb } // n = 7, score = 400 // e8???????? | // 8bd6 | mov edx, esi // 8d4d80 | lea ecx, dword ptr [ebp - 0x80] // e8???????? | // 83c41c | add esp, 0x1c // 50 | push eax // 8bcb | mov ecx, ebx $sequence_5 = { e8???????? 8b55b0 e8???????? 8b8f88000000 894808 8a45ff 8845ff } // n = 7, score = 400 // e8???????? | // 8b55b0 | mov edx, dword ptr [ebp - 0x50] // e8???????? | // 8b8f88000000 | mov ecx, dword ptr [edi + 0x88] // 894808 | mov dword ptr [eax + 8], ecx // 8a45ff | mov al, byte ptr [ebp - 1] // 8845ff | mov byte ptr [ebp - 1], al $sequence_6 = { ff742428 0fb64520 8bcb 8b5508 50 ff742428 56 } // n = 7, score = 400 // ff742428 | push dword ptr [esp + 0x28] // 0fb64520 | movzx eax, byte ptr [ebp + 0x20] // 8bcb | mov ecx, ebx // 8b5508 | mov edx, dword ptr [ebp + 8] // 50 | push eax // ff742428 | push dword ptr [esp + 0x28] // 56 | push esi $sequence_7 = { e8???????? e9???????? 8b431c e9???????? 33c0 be80000000 83fa1d } // n = 7, score = 400 // e8???????? | // e9???????? | // 8b431c | mov eax, dword ptr [ebx + 0x1c] // e9???????? | // 33c0 | xor eax, eax // be80000000 | mov esi, 0x80 // 83fa1d | cmp edx, 0x1d $sequence_8 = { e9???????? 85ff 7e5e 85d2 7e29 81fecccccc0c 7f4f } // n = 7, score = 400 // e9???????? | // 85ff | test edi, edi // 7e5e | jle 0x60 // 85d2 | test edx, edx // 7e29 | jle 0x2b // 81fecccccc0c | cmp esi, 0xccccccc // 7f4f | jg 0x51 $sequence_9 = { 8b3b 897c2418 752c 50 8bd6 8bcb e8???????? } // n = 7, score = 400 // 8b3b | mov edi, dword ptr [ebx] // 897c2418 | mov dword ptr [esp + 0x18], edi // 752c | jne 0x2e // 50 | push eax // 8bd6 | mov edx, esi // 8bcb | mov ecx, ebx // e8???????? | condition: 7 of them and filesize < 1867776 }
rule win_adkoob_w0 { meta: author = "Felix Weyne, Sophos" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.adkoob" malpedia_version = "20180606" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $facebook_cookie_firefox = "SELECT * FROM moz_cookies WHERE moz_cookies.host LIKE \"%.facebook.com\"" nocase ascii $facebook_cookie_chrome = "SELECT * FROM cookies WHERE cookies.host_key LIKE \"%.facebook.com\"" nocase ascii $facebook_regex_ad_account_id = "<td [^>]*?data-testid=\"all_accounts_table_account_id_cell\">([^<>]*?)</td>" nocase wide $self_destruction = "/C ping localhost -n 4 > nul & del" nocase wide condition: all of them }
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