Actor(s): EMISSARY PANDA, Hurricane Panda, Lazarus Group, Leviathan, Stone Panda
There is no description at this point.
rule win_ghost_rat_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2021-06-10" version = "1" description = "Detects win.ghost_rat." 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.ghost_rat" malpedia_rule_date = "20210604" malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd" malpedia_version = "20210616" 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 = { 6a01 56 ff15???????? 5e c20800 } // n = 5, score = 500 // 6a01 | push 1 // 56 | push esi // ff15???????? | // 5e | pop esi // c20800 | ret 8 $sequence_1 = { 8bd9 e8???????? 8b4d08 3bc8 } // n = 4, score = 500 // 8bd9 | mov ebx, ecx // e8???????? | // 8b4d08 | mov ecx, dword ptr [ebp + 8] // 3bc8 | cmp ecx, eax $sequence_2 = { 8b400c 85c0 7505 a1???????? 50 8bce e8???????? } // n = 7, score = 500 // 8b400c | mov eax, dword ptr [eax + 0xc] // 85c0 | test eax, eax // 7505 | jne 7 // a1???????? | // 50 | push eax // 8bce | mov ecx, esi // e8???????? | $sequence_3 = { 6a6b 8bce e8???????? 5f 5e } // n = 5, score = 400 // 6a6b | push 0x6b // 8bce | mov ecx, esi // e8???????? | // 5f | pop edi // 5e | pop esi $sequence_4 = { 8b06 6aff 50 ff15???????? 8b0e 51 } // n = 6, score = 400 // 8b06 | mov eax, dword ptr [esi] // 6aff | push -1 // 50 | push eax // ff15???????? | // 8b0e | mov ecx, dword ptr [esi] // 51 | push ecx $sequence_5 = { c20400 894df4 c745f800000000 df6df4 83ec08 dc0d???????? dd1c24 } // n = 7, score = 400 // c20400 | ret 4 // 894df4 | mov dword ptr [ebp - 0xc], ecx // c745f800000000 | mov dword ptr [ebp - 8], 0 // df6df4 | fild qword ptr [ebp - 0xc] // 83ec08 | sub esp, 8 // dc0d???????? | // dd1c24 | fstp qword ptr [esp] $sequence_6 = { 5b 8be5 5d c20400 894df4 c745f800000000 } // n = 6, score = 400 // 5b | pop ebx // 8be5 | mov esp, ebp // 5d | pop ebp // c20400 | ret 4 // 894df4 | mov dword ptr [ebp - 0xc], ecx // c745f800000000 | mov dword ptr [ebp - 8], 0 $sequence_7 = { 50 6800000080 ff15???????? 85c0 7407 32c0 e9???????? } // n = 7, score = 300 // 50 | push eax // 6800000080 | push 0x80000000 // ff15???????? | // 85c0 | test eax, eax // 7407 | je 9 // 32c0 | xor al, al // e9???????? | $sequence_8 = { 84c0 7505 83ceff eb2c } // n = 4, score = 300 // 84c0 | test al, al // 7505 | jne 7 // 83ceff | or esi, 0xffffffff // eb2c | jmp 0x2e $sequence_9 = { 8dbd85feffff f3ab 66ab aa } // n = 4, score = 300 // 8dbd85feffff | lea edi, dword ptr [ebp - 0x17b] // f3ab | rep stosd dword ptr es:[edi], eax // 66ab | stosw word ptr es:[edi], ax // aa | stosb byte ptr es:[edi], al $sequence_10 = { f3a4 ff15???????? 8bf0 83c40c 46 750b } // n = 6, score = 300 // f3a4 | rep movsb byte ptr es:[edi], byte ptr [esi] // ff15???????? | // 8bf0 | mov esi, eax // 83c40c | add esp, 0xc // 46 | inc esi // 750b | jne 0xd $sequence_11 = { 68???????? 6a00 6a00 e8???????? 8b8e549f0000 } // n = 5, score = 300 // 68???????? | // 6a00 | push 0 // 6a00 | push 0 // e8???????? | // 8b8e549f0000 | mov ecx, dword ptr [esi + 0x9f54] $sequence_12 = { e9???????? 8d45dc 50 681f000200 } // n = 4, score = 300 // e9???????? | // 8d45dc | lea eax, dword ptr [ebp - 0x24] // 50 | push eax // 681f000200 | push 0x2001f $sequence_13 = { 68???????? 50 6802000080 e8???????? 83c41c 5f } // n = 6, score = 300 // 68???????? | // 50 | push eax // 6802000080 | push 0x80000002 // e8???????? | // 83c41c | add esp, 0x1c // 5f | pop edi $sequence_14 = { 57 8bfe f2ae f7d1 49 7509 5f } // n = 7, score = 300 // 57 | push edi // 8bfe | mov edi, esi // f2ae | repne scasb al, byte ptr es:[edi] // f7d1 | not ecx // 49 | dec ecx // 7509 | jne 0xb // 5f | pop edi $sequence_15 = { 8365fc00 ff7508 ff15???????? 40 50 ff15???????? 59 } // n = 7, score = 300 // 8365fc00 | and dword ptr [ebp - 4], 0 // ff7508 | push dword ptr [ebp + 8] // ff15???????? | // 40 | inc eax // 50 | push eax // ff15???????? | // 59 | pop ecx $sequence_16 = { 8bce ff75e8 e8???????? 8bce e8???????? } // n = 5, score = 300 // 8bce | mov ecx, esi // ff75e8 | push dword ptr [ebp - 0x18] // e8???????? | // 8bce | mov ecx, esi // e8???????? | $sequence_17 = { 8b5c2408 55 8b6c2410 56 8b742418 57 3bee } // n = 7, score = 300 // 8b5c2408 | mov ebx, dword ptr [esp + 8] // 55 | push ebp // 8b6c2410 | mov ebp, dword ptr [esp + 0x10] // 56 | push esi // 8b742418 | mov esi, dword ptr [esp + 0x18] // 57 | push edi // 3bee | cmp ebp, esi $sequence_18 = { 6a00 50 e8???????? 83c40c ff7508 6a40 ff15???????? } // n = 7, score = 300 // 6a00 | push 0 // 50 | push eax // e8???????? | // 83c40c | add esp, 0xc // ff7508 | push dword ptr [ebp + 8] // 6a40 | push 0x40 // ff15???????? | $sequence_19 = { 6a01 ff7620 ff15???????? 8b4e04 e8???????? 33c0 } // n = 6, score = 300 // 6a01 | push 1 // ff7620 | push dword ptr [esi + 0x20] // ff15???????? | // 8b4e04 | mov ecx, dword ptr [esi + 4] // e8???????? | // 33c0 | xor eax, eax $sequence_20 = { e8???????? 59 83c8ff e9???????? 8b45fc } // n = 5, score = 300 // e8???????? | // 59 | pop ecx // 83c8ff | or eax, 0xffffffff // e9???????? | // 8b45fc | mov eax, dword ptr [ebp - 4] $sequence_21 = { ff7510 ff75dc ff15???????? 85c0 7507 c745e401000000 834dfcff } // n = 7, score = 300 // ff7510 | push dword ptr [ebp + 0x10] // ff75dc | push dword ptr [ebp - 0x24] // ff15???????? | // 85c0 | test eax, eax // 7507 | jne 9 // c745e401000000 | mov dword ptr [ebp - 0x1c], 1 // 834dfcff | or dword ptr [ebp - 4], 0xffffffff $sequence_22 = { c745e0867f0000 c745e4837f0000 c745e8857f0000 c745ec827f0000 } // n = 4, score = 200 // c745e0867f0000 | mov dword ptr [ebp - 0x20], 0x7f86 // c745e4837f0000 | mov dword ptr [ebp - 0x1c], 0x7f83 // c745e8857f0000 | mov dword ptr [ebp - 0x18], 0x7f85 // c745ec827f0000 | mov dword ptr [ebp - 0x14], 0x7f82 $sequence_23 = { c745e8857f0000 c745ec827f0000 c745f0847f0000 c745f4047f0000 } // n = 4, score = 200 // c745e8857f0000 | mov dword ptr [ebp - 0x18], 0x7f85 // c745ec827f0000 | mov dword ptr [ebp - 0x14], 0x7f82 // c745f0847f0000 | mov dword ptr [ebp - 0x10], 0x7f84 // c745f4047f0000 | mov dword ptr [ebp - 0xc], 0x7f04 $sequence_24 = { 83e9fc c7014c696272 83e9fc c70161727941 } // n = 4, score = 200 // 83e9fc | sub ecx, -4 // c7014c696272 | mov dword ptr [ecx], 0x7262694c // 83e9fc | sub ecx, -4 // c70161727941 | mov dword ptr [ecx], 0x41797261 $sequence_25 = { 813f6b006500 7406 813f4b004500 75e8 } // n = 4, score = 200 // 813f6b006500 | cmp dword ptr [edi], 0x65006b // 7406 | je 8 // 813f4b004500 | cmp dword ptr [edi], 0x45004b // 75e8 | jne 0xffffffea $sequence_26 = { 8b761c 8b4608 8b7e20 8b36 813f6b006500 7406 } // n = 6, score = 200 // 8b761c | mov esi, dword ptr [esi + 0x1c] // 8b4608 | mov eax, dword ptr [esi + 8] // 8b7e20 | mov edi, dword ptr [esi + 0x20] // 8b36 | mov esi, dword ptr [esi] // 813f6b006500 | cmp dword ptr [edi], 0x65006b // 7406 | je 8 $sequence_27 = { 898d44ffffff 8b9544ffffff 33c0 668b4206 } // n = 4, score = 100 // 898d44ffffff | mov dword ptr [ebp - 0xbc], ecx // 8b9544ffffff | mov edx, dword ptr [ebp - 0xbc] // 33c0 | xor eax, eax // 668b4206 | mov ax, word ptr [edx + 6] $sequence_28 = { 8b5104 83ea08 d1ea 3955f4 7749 8b45f0 33c9 } // n = 7, score = 100 // 8b5104 | mov edx, dword ptr [ecx + 4] // 83ea08 | sub edx, 8 // d1ea | shr edx, 1 // 3955f4 | cmp dword ptr [ebp - 0xc], edx // 7749 | ja 0x4b // 8b45f0 | mov eax, dword ptr [ebp - 0x10] // 33c9 | xor ecx, ecx $sequence_29 = { 8945ec 8b8d58ffffff 034dec 66c7014343 8b9558ffffff 8b423c } // n = 6, score = 100 // 8945ec | mov dword ptr [ebp - 0x14], eax // 8b8d58ffffff | mov ecx, dword ptr [ebp - 0xa8] // 034dec | add ecx, dword ptr [ebp - 0x14] // 66c7014343 | mov word ptr [ecx], 0x4343 // 8b9558ffffff | mov edx, dword ptr [ebp - 0xa8] // 8b423c | mov eax, dword ptr [edx + 0x3c] $sequence_30 = { 8b8dfcfeffff 51 ff9514ffffff 83c40c e9???????? 8b957cffffff 83ba8800000000 } // n = 7, score = 100 // 8b8dfcfeffff | mov ecx, dword ptr [ebp - 0x104] // 51 | push ecx // ff9514ffffff | call dword ptr [ebp - 0xec] // 83c40c | add esp, 0xc // e9???????? | // 8b957cffffff | mov edx, dword ptr [ebp - 0x84] // 83ba8800000000 | cmp dword ptr [edx + 0x88], 0 $sequence_31 = { 41 ebc0 8d8d98ffffff c7014c6f6164 } // n = 4, score = 100 // 41 | inc ecx // ebc0 | jmp 0xffffffc2 // 8d8d98ffffff | lea ecx, dword ptr [ebp - 0x68] // c7014c6f6164 | mov dword ptr [ecx], 0x64616f4c condition: 7 of them and filesize < 357376 }
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