Actor(s): APT29
There is no description at this point.
rule win_cosmicduke_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-12-06" version = "1" description = "Detects win.cosmicduke." 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.cosmicduke" malpedia_rule_date = "20231130" malpedia_hash = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351" malpedia_version = "20230808" 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 = { ff542418 83c602 47 3b742428 72ce 8b4514 } // n = 6, score = 100 // ff542418 | call dword ptr [esp + 0x18] // 83c602 | add esi, 2 // 47 | inc edi // 3b742428 | cmp esi, dword ptr [esp + 0x28] // 72ce | jb 0xffffffd0 // 8b4514 | mov eax, dword ptr [ebp + 0x14] $sequence_1 = { ff8688050000 b001 5f c3 6a1f 5a 8bc1 } // n = 7, score = 100 // ff8688050000 | inc dword ptr [esi + 0x588] // b001 | mov al, 1 // 5f | pop edi // c3 | ret // 6a1f | push 0x1f // 5a | pop edx // 8bc1 | mov eax, ecx $sequence_2 = { c1e104 03cb 898439142c0000 e9???????? 3975e4 7408 ff75e4 } // n = 7, score = 100 // c1e104 | shl ecx, 4 // 03cb | add ecx, ebx // 898439142c0000 | mov dword ptr [ecx + edi + 0x2c14], eax // e9???????? | // 3975e4 | cmp dword ptr [ebp - 0x1c], esi // 7408 | je 0xa // ff75e4 | push dword ptr [ebp - 0x1c] $sequence_3 = { 8d7c241c e8???????? 3ac3 0f84ac010000 8b442420 89442430 8d842438200000 } // n = 7, score = 100 // 8d7c241c | lea edi, [esp + 0x1c] // e8???????? | // 3ac3 | cmp al, bl // 0f84ac010000 | je 0x1b2 // 8b442420 | mov eax, dword ptr [esp + 0x20] // 89442430 | mov dword ptr [esp + 0x30], eax // 8d842438200000 | lea eax, [esp + 0x2038] $sequence_4 = { 85db 7507 32c0 e9???????? 837d1400 74f3 807d1000 } // n = 7, score = 100 // 85db | test ebx, ebx // 7507 | jne 9 // 32c0 | xor al, al // e9???????? | // 837d1400 | cmp dword ptr [ebp + 0x14], 0 // 74f3 | je 0xfffffff5 // 807d1000 | cmp byte ptr [ebp + 0x10], 0 $sequence_5 = { 6a01 68???????? 56 53 e8???????? b001 5f } // n = 7, score = 100 // 6a01 | push 1 // 68???????? | // 56 | push esi // 53 | push ebx // e8???????? | // b001 | mov al, 1 // 5f | pop edi $sequence_6 = { 8bc7 8d4c2414 e8???????? 53 8d44243c 50 } // n = 6, score = 100 // 8bc7 | mov eax, edi // 8d4c2414 | lea ecx, [esp + 0x14] // e8???????? | // 53 | push ebx // 8d44243c | lea eax, [esp + 0x3c] // 50 | push eax $sequence_7 = { e8???????? 0fb7c0 894510 6685c0 7512 33c0 40 } // n = 7, score = 100 // e8???????? | // 0fb7c0 | movzx eax, ax // 894510 | mov dword ptr [ebp + 0x10], eax // 6685c0 | test ax, ax // 7512 | jne 0x14 // 33c0 | xor eax, eax // 40 | inc eax $sequence_8 = { ff7508 8bf0 8d85ecfdffff 50 ff15???????? 8b3d???????? } // n = 6, score = 100 // ff7508 | push dword ptr [ebp + 8] // 8bf0 | mov esi, eax // 8d85ecfdffff | lea eax, [ebp - 0x214] // 50 | push eax // ff15???????? | // 8b3d???????? | $sequence_9 = { e8???????? 84c0 742f 838c244c300000ff 8d74240c e8???????? 8b4508 } // n = 7, score = 100 // e8???????? | // 84c0 | test al, al // 742f | je 0x31 // 838c244c300000ff | or dword ptr [esp + 0x304c], 0xffffffff // 8d74240c | lea esi, [esp + 0xc] // e8???????? | // 8b4508 | mov eax, dword ptr [ebp + 8] condition: 7 of them and filesize < 456704 }
rule win_cosmicduke_w0 { meta: description = "detect cosmicduke" author = "@malgamy12" date = "2022-11-6" license = "DRL 1.1" hash_sample1 = "93054d3abc36019ccfe88f87363363e6ca9b77f4" hash_sample2 = "0eadbd6ef9f5930257530ac5a3b8abb49c9755d1" hash_sample3 = "69c2d292179dc615bfe4d7f880b5f9928604558e" hash_sample4 = "616306489de4029da7271eadbdf090cee22ae1af" hash_sample5 = "ecb8edfddd812a125b515dc42a2e93569c1caed9" hash_sample6 = "a86f3faf1eedb7325023616adf37a62c9129c24e" hash_sample7 = "4d22b2d85b75ccf651f0ba85808482660a440bff" hash_sample8 = "3463df6b33b26c1249207f6e004c0bbc31b31152" hash_sample9 = "ca4c53eb86d5b920b321de573e212e31405707d5" hash_sample10 = "a48e4dd017618ae2d46a753345594a5f57fbe869" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.cosmicduke" malpedia_rule_date = "20230118" malpedia_hash = "" malpedia_version = "20230118" malpedia_license = "DRL 1.1" malpedia_sharing = "TLP:WHITE" strings: $pdb = "5\\bin\\bot.pdb" ascii $s1 = "pipe\\40DC244D-F62E-093E-8A91-736FF2FA2AA2" wide $s2 = "LoginName" ascii $s3 = "select id, hostname, usernamefield, passwordfield, encryptedusern" wide $s4 = "*temporary;*Cookies;*games;*system32;*program files;*\\windows\\;*\\System Volume Information" wide $s5 = "msicheck.cmd" ascii $s6 = "AppData\\Roaming\\Miranda" wide $s7 = "Local Settings\\Application Data" wide /* imul ebx, esi imul esi, 0BC8Fh mov eax, edx and eax, 3 lea eax, [ebp+eax*4+var_3C] xor [eax], ebx inc edx dec [ebp+var_8] */ $chunk_1 = {0F AF DE 69 F6 ?? ?? ?? ?? 8B C2 83 E0 ?? 8D 44 85 ?? 31 18 42 FF 4D ??} condition: uint16(0) == 0x5A4D and filesize > 70KB and ($pdb or (4 of ($s*) and $chunk_1 )) }
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