There is no description at this point.
rule win_nightsky_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-01-25" version = "1" description = "Detects win.nightsky." 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.nightsky" 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 = { 4d03c0 498b17 488bc8 e8???????? 4c8b5b08 488b03 6642892c58 } // n = 7, score = 100 // 4d03c0 | mov bh, 0xf5 // 498b17 | inc ecx // 488bc8 | push ebx // e8???????? | // 4c8b5b08 | push ebx // 488b03 | not si // 6642892c58 | mov si, 0x330d $sequence_1 = { e8???????? 488bfb 4803ff 4c8d2d2d000100 49837cfd0000 7404 8bc6 } // n = 7, score = 100 // e8???????? | // 488bfb | dec eax // 4803ff | mov ecx, ebp // 4c8d2d2d000100 | dec esp // 49837cfd0000 | mov eax, esi // 7404 | xor edx, edx // 8bc6 | test eax, eax $sequence_2 = { 498b4c2408 48894b08 48ffc1 b802000000 48f7e1 490f40c5 } // n = 6, score = 100 // 498b4c2408 | rol dx, cl // 48894b08 | dec eax // 48ffc1 | lea eax, [esp + 0x50] // b802000000 | dec ebp // 48f7e1 | sub eax, ecx // 490f40c5 | dec eax $sequence_3 = { 4983fc07 400f97c7 4883c701 745c 498b4508 498b5d18 4c8d4c2420 } // n = 7, score = 100 // 4983fc07 | lea edx, [0xa97a] // 400f97c7 | dec eax // 4883c701 | mov edi, eax // 745c | dec eax // 498b4508 | test eax, eax // 498b5d18 | je 0xbce // 4c8d4c2420 | dec eax $sequence_4 = { 420fb68c22e0b10400 440bc1 410fb6c9 41c1e008 420fb68c2180af0400 } // n = 5, score = 100 // 420fb68c22e0b10400 | lea ecx, [ebx + ebx*4] // 440bc1 | jmp 0x3ae // 410fb6c9 | dec ebp // 41c1e008 | test eax, eax // 420fb68c2180af0400 | jne 0x3ae $sequence_5 = { 488b88c0000000 488d05d6400100 395914 4a8b0cf0 498b0c0f } // n = 5, score = 100 // 488b88c0000000 | inc ecx // 488d05d6400100 | push edi // 395914 | dec eax // 4a8b0cf0 | mov ebp, esp // 498b0c0f | dec eax $sequence_6 = { 41d3e1 4402c0 488bfc 4881ec80010000 f9 66452bc7 4881e4f0ffffff } // n = 7, score = 100 // 41d3e1 | dec eax // 4402c0 | shrd ebp, ebp, 0x3e // 488bfc | xor dword ptr [esp], ecx // 4881ec80010000 | pop ebp // f9 | inc eax // 66452bc7 | cmp al, bh // 4881e4f0ffffff | cmp bh, 0xe1 $sequence_7 = { 4889442428 488d057c130100 4889442420 4c8b4c2450 4c8b442458 488b542460 33c9 } // n = 7, score = 100 // 4889442428 | cmp al, cl // 488d057c130100 | dec eax // 4889442420 | mov esi, 0 // 4c8b4c2450 | add dword ptr [eax], eax // 4c8b442458 | add byte ptr [eax], al // 488b542460 | inc ecx // 33c9 | not eax $sequence_8 = { 4156 66440fbeca 0fbfd9 660fb6f9 50 480fb7f1 4d8bd4 } // n = 7, score = 100 // 4156 | test ch, 0x3d // 66440fbeca | xor al, al // 0fbfd9 | dec eax // 660fb6f9 | add esp, 0x20 // 50 | pop ebx // 480fb7f1 | ret // 4d8bd4 | dec eax $sequence_9 = { 0f8cc6010000 41b816000000 488d15993c0300 488bcb e8???????? 85c0 } // n = 6, score = 100 // 0f8cc6010000 | sub eax, ebp // 41b816000000 | stc // 488d15993c0300 | inc ecx // 488bcb | shr dl, 0x9b // e8???????? | // 85c0 | sub dl, 0xbc condition: 7 of them and filesize < 19536896 }
If your designated proposal does not fit in any other category, feel free to write a free-text in the comment field below.
Please propose all changes regarding references on the Malpedia library page
Your suggestion will be reviewed before being published. Thank you for contributing!
YYYY-MM-DD
YYYY-MM
YYYY