Actor(s): APT28
There is no description at this point.
rule win_sedreco_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2024-10-31" version = "1" description = "Detects win.sedreco." 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.sedreco" malpedia_rule_date = "20241030" malpedia_hash = "26e26953c49c8efafbf72a38076855d578e0a2e4" malpedia_version = "20241030" 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 = { e8???????? 89450c 56 85c0 } // n = 4, score = 2600 // e8???????? | // 89450c | mov dword ptr [ebp + 0xc], eax // 56 | push esi // 85c0 | test eax, eax $sequence_1 = { 8bec 51 836d0804 53 56 } // n = 5, score = 2600 // 8bec | mov ebp, esp // 51 | push ecx // 836d0804 | sub dword ptr [ebp + 8], 4 // 53 | push ebx // 56 | push esi $sequence_2 = { c645ff30 e8???????? 85c0 7505 } // n = 4, score = 2600 // c645ff30 | mov byte ptr [ebp - 1], 0x30 // e8???????? | // 85c0 | test eax, eax // 7505 | jne 7 $sequence_3 = { 8b750c 56 e8???????? 6a08 } // n = 4, score = 2600 // 8b750c | mov esi, dword ptr [ebp + 0xc] // 56 | push esi // e8???????? | // 6a08 | push 8 $sequence_4 = { 50 68???????? 6a0d 68???????? } // n = 4, score = 2500 // 50 | push eax // 68???????? | // 6a0d | push 0xd // 68???????? | $sequence_5 = { 51 6802020000 68???????? 50 } // n = 4, score = 2400 // 51 | push ecx // 6802020000 | push 0x202 // 68???????? | // 50 | push eax $sequence_6 = { 7ce0 a1???????? 5e 85c0 } // n = 4, score = 2400 // 7ce0 | jl 0xffffffe2 // a1???????? | // 5e | pop esi // 85c0 | test eax, eax $sequence_7 = { 7411 6a04 68???????? 68???????? } // n = 4, score = 2400 // 7411 | je 0x13 // 6a04 | push 4 // 68???????? | // 68???????? | $sequence_8 = { ffd6 8b0d???????? 894170 85c0 } // n = 4, score = 2200 // ffd6 | call esi // 8b0d???????? | // 894170 | mov dword ptr [ecx + 0x70], eax // 85c0 | test eax, eax $sequence_9 = { ff15???????? 83c604 81fe???????? 7ce0 a1???????? } // n = 5, score = 2200 // ff15???????? | // 83c604 | add esi, 4 // 81fe???????? | // 7ce0 | jl 0xffffffe2 // a1???????? | $sequence_10 = { e8???????? 83c40c b8f6eeeeee 8b4df0 64890d00000000 } // n = 5, score = 2200 // e8???????? | // 83c40c | add esp, 0xc // b8f6eeeeee | mov eax, 0xeeeeeef6 // 8b4df0 | mov ecx, dword ptr [ebp - 0x10] // 64890d00000000 | mov dword ptr fs:[0], ecx $sequence_11 = { ffd6 8b0d???????? 898180000000 85c0 } // n = 4, score = 2200 // ffd6 | call esi // 8b0d???????? | // 898180000000 | mov dword ptr [ecx + 0x80], eax // 85c0 | test eax, eax $sequence_12 = { 56 be???????? 8b06 85c0 740f 50 } // n = 6, score = 2200 // 56 | push esi // be???????? | // 8b06 | mov eax, dword ptr [esi] // 85c0 | test eax, eax // 740f | je 0x11 // 50 | push eax $sequence_13 = { ffd0 c745fcfeffffff e8???????? 33c0 } // n = 4, score = 2200 // ffd0 | call eax // c745fcfeffffff | mov dword ptr [ebp - 4], 0xfffffffe // e8???????? | // 33c0 | xor eax, eax $sequence_14 = { 6a01 68???????? ff35???????? ff15???????? ffd0 } // n = 5, score = 1100 // 6a01 | push 1 // 68???????? | // ff35???????? | // ff15???????? | // ffd0 | call eax $sequence_15 = { 68???????? 6a00 6a00 ffd6 50 68???????? 6aff } // n = 7, score = 500 // 68???????? | // 6a00 | push eax // 6a00 | jl 0xffffffe2 // ffd6 | pop esi // 50 | test eax, eax // 68???????? | // 6aff | add esi, 4 $sequence_16 = { 8b35???????? 83c404 6a00 68???????? 6aff 68???????? 6a00 } // n = 7, score = 500 // 8b35???????? | // 83c404 | push 8 // 6a00 | mov dword ptr [ebp + 0xc], eax // 68???????? | // 6aff | push esi // 68???????? | // 6a00 | test eax, eax $sequence_17 = { 6800010000 6a00 68???????? e8???????? 6800020000 } // n = 5, score = 500 // 6800010000 | pop esi // 6a00 | push esi // 68???????? | // e8???????? | // 6800020000 | mov eax, dword ptr [esi] $sequence_18 = { 488b15???????? 48c7c101000080 488b05???????? ff9038010000 } // n = 4, score = 500 // 488b15???????? | // 48c7c101000080 | inc ecx // 488b05???????? | // ff9038010000 | mov ecx, 0x20006 $sequence_19 = { 4533c9 4533c0 ba00000080 488b0d???????? 488b05???????? } // n = 5, score = 500 // 4533c9 | call dword ptr [eax + 0xe8] // 4533c0 | mov edx, 0x2710 // ba00000080 | call dword ptr [eax + 0x10] // 488b0d???????? | // 488b05???????? | $sequence_20 = { 488b0d???????? 488b05???????? ff5010 85c0 } // n = 4, score = 500 // 488b0d???????? | // 488b05???????? | // ff5010 | dec eax // 85c0 | mov dword ptr [esp + 0x10], ebx $sequence_21 = { 488b05???????? ff9040010000 90 4883c430 } // n = 4, score = 500 // 488b05???????? | // ff9040010000 | call dword ptr [eax + 0xe8] // 90 | mov edx, 0x2710 // 4883c430 | call dword ptr [eax + 0x140] $sequence_22 = { 488b05???????? ff90e8000000 488b0d???????? 488b05???????? ff5028 48c705????????00000000 } // n = 6, score = 500 // 488b05???????? | // ff90e8000000 | dec eax // 488b0d???????? | // 488b05???????? | // ff5028 | add esp, 0x28 // 48c705????????00000000 | $sequence_23 = { 68???????? e8???????? 8b35???????? 83c404 6a00 } // n = 5, score = 500 // 68???????? | // e8???????? | // 8b35???????? | // 83c404 | push 0x200 // 6a00 | push 0 $sequence_24 = { 4889442420 41b906000200 4533c0 488b15???????? 48c7c101000080 } // n = 5, score = 500 // 4889442420 | inc ebp // 41b906000200 | xor ecx, ecx // 4533c0 | inc ebp // 488b15???????? | // 48c7c101000080 | xor eax, eax $sequence_25 = { 4883c428 c3 48890d???????? c3 48895c2410 } // n = 5, score = 500 // 4883c428 | dec eax // c3 | add esp, 0x28 // 48890d???????? | // c3 | ret // 48895c2410 | ret $sequence_26 = { 488b05???????? ff90e8000000 ba10270000 488b0d???????? } // n = 4, score = 500 // 488b05???????? | // ff90e8000000 | call dword ptr [eax + 0x10] // ba10270000 | test eax, eax // 488b0d???????? | $sequence_27 = { 7cd5 68???????? e8???????? 8b4dfc } // n = 4, score = 400 // 7cd5 | call esi // 68???????? | // e8???????? | // 8b4dfc | call esi $sequence_28 = { 6a00 ffd6 8b4dfc 5f 5e 33cd b8???????? } // n = 7, score = 400 // 6a00 | push eax // ffd6 | push -1 // 8b4dfc | add esp, 4 // 5f | push 0 // 5e | push 0 // 33cd | push 0 // b8???????? | $sequence_29 = { 53 68???????? ff35???????? ffd6 ffd0 85c0 } // n = 6, score = 400 // 53 | push ebx // 68???????? | // ff35???????? | // ffd6 | call esi // ffd0 | call eax // 85c0 | test eax, eax $sequence_30 = { c20c00 6a02 ff74240c ff74240c e8???????? c20800 ff74240c } // n = 7, score = 300 // c20c00 | ret 0xc // 6a02 | push 2 // ff74240c | push dword ptr [esp + 0xc] // ff74240c | push dword ptr [esp + 0xc] // e8???????? | // c20800 | ret 8 // ff74240c | push dword ptr [esp + 0xc] $sequence_31 = { 8d55f8 52 50 8b08 ff5124 } // n = 5, score = 300 // 8d55f8 | lea edx, [ebp - 8] // 52 | push edx // 50 | push eax // 8b08 | mov ecx, dword ptr [eax] // ff5124 | call dword ptr [ecx + 0x24] $sequence_32 = { e8???????? 8d0c36 51 50 68???????? e8???????? } // n = 6, score = 300 // e8???????? | // 8d0c36 | push -1 // 51 | push 0 // 50 | push 0 // 68???????? | // e8???????? | $sequence_33 = { 52 50 ff91f0000000 8bf0 } // n = 4, score = 300 // 52 | push edx // 50 | push eax // ff91f0000000 | call dword ptr [ecx + 0xf0] // 8bf0 | mov esi, eax $sequence_34 = { 33cc e8???????? 8be5 5d c3 e8???????? a1???????? } // n = 7, score = 300 // 33cc | push -1 // e8???????? | // 8be5 | push 0 // 5d | call esi // c3 | push eax // e8???????? | // a1???????? | $sequence_35 = { 6aff 50 6a00 6a00 ff15???????? 5e } // n = 6, score = 200 // 6aff | push -1 // 50 | push eax // 6a00 | push 0 // 6a00 | push 0 // ff15???????? | // 5e | pop esi $sequence_36 = { 53 56 57 c745dce197af54 } // n = 4, score = 200 // 53 | push ebx // 56 | push esi // 57 | push edi // c745dce197af54 | mov dword ptr [ebp - 0x24], 0x54af97e1 $sequence_37 = { 8b85ecfeffff 8b4df4 64890d00000000 5f 5e } // n = 5, score = 200 // 8b85ecfeffff | mov eax, dword ptr [ebp - 0x114] // 8b4df4 | mov ecx, dword ptr [ebp - 0xc] // 64890d00000000 | mov dword ptr fs:[0], ecx // 5f | pop edi // 5e | pop esi $sequence_38 = { 741f 6a07 68???????? e8???????? 85c0 7402 } // n = 6, score = 200 // 741f | je 0x21 // 6a07 | push 7 // 68???????? | // e8???????? | // 85c0 | test eax, eax // 7402 | je 4 $sequence_39 = { 50 ff512c 8bf0 f7de 1bf6 } // n = 5, score = 200 // 50 | push eax // ff512c | call dword ptr [ecx + 0x2c] // 8bf0 | mov esi, eax // f7de | neg esi // 1bf6 | sbb esi, esi $sequence_40 = { 57 894df0 ff15???????? 8945fc 8b45f0 8945f4 8b45f4 } // n = 7, score = 200 // 57 | push edi // 894df0 | mov dword ptr [ebp - 0x10], ecx // ff15???????? | // 8945fc | mov dword ptr [ebp - 4], eax // 8b45f0 | mov eax, dword ptr [ebp - 0x10] // 8945f4 | mov dword ptr [ebp - 0xc], eax // 8b45f4 | mov eax, dword ptr [ebp - 0xc] $sequence_41 = { 57 50 ff512c 8bce 8bd8 e8???????? 57 } // n = 7, score = 200 // 57 | push edi // 50 | push eax // ff512c | call dword ptr [ecx + 0x2c] // 8bce | mov ecx, esi // 8bd8 | mov ebx, eax // e8???????? | // 57 | push edi $sequence_42 = { 8b06 50 8b08 ff9180000000 8b06 } // n = 5, score = 200 // 8b06 | mov eax, dword ptr [esi] // 50 | push eax // 8b08 | mov ecx, dword ptr [eax] // ff9180000000 | call dword ptr [ecx + 0x80] // 8b06 | mov eax, dword ptr [esi] $sequence_43 = { c644043c00 8854242c ff15???????? 8d7c2438 83c9ff } // n = 5, score = 100 // c644043c00 | add esi, 4 // 8854242c | jl 0xffffffe2 // ff15???????? | // 8d7c2438 | push esi // 83c9ff | mov eax, dword ptr [esi] $sequence_44 = { 7640 3bdf 753c 8b742448 a1???????? 85f6 7402 } // n = 7, score = 100 // 7640 | jl 0xffffffe2 // 3bdf | pop esi // 753c | add esi, 4 // 8b742448 | jl 0xffffffe2 // a1???????? | // 85f6 | pop esi // 7402 | test eax, eax $sequence_45 = { f3aa 8a5c2411 8a442410 8ad3 } // n = 4, score = 100 // f3aa | add esi, 4 // 8a5c2411 | jl 0xffffffe5 // 8a442410 | pop esi // 8ad3 | test eax, eax $sequence_46 = { 740d 3cff 7409 fec8 8841ff b001 eb65 } // n = 7, score = 100 // 740d | push 4 // 3cff | jl 0xffffffe2 // 7409 | pop esi // fec8 | test eax, eax // 8841ff | add esi, 4 // b001 | jl 0xffffffe2 // eb65 | add esi, 4 $sequence_47 = { 52 e8???????? 8d4624 8d4c2418 } // n = 4, score = 100 // 52 | push 0x202 // e8???????? | // 8d4624 | push eax // 8d4c2418 | je 0x13 $sequence_48 = { 8b8c247c080000 e8???????? b907010000 33c0 8dbc243c040000 c7842464080000ffffffff f3ab } // n = 7, score = 100 // 8b8c247c080000 | add esi, 4 // e8???????? | // b907010000 | jl 0xffffffe2 // 33c0 | pop esi // 8dbc243c040000 | mov eax, dword ptr [esi] // c7842464080000ffffffff | test eax, eax // f3ab | je 0x13 $sequence_49 = { 741d 8b542428 8b44242c 0fbecb 03c2 8ae9 } // n = 6, score = 100 // 741d | jl 0xffffffe2 // 8b542428 | jl 0xffffffe2 // 8b44242c | pop esi // 0fbecb | jl 0xffffffe2 // 03c2 | pop esi // 8ae9 | test eax, eax $sequence_50 = { 8915???????? 83fbfd 8935???????? 763b ff15???????? } // n = 5, score = 100 // 8915???????? | // 83fbfd | push eax // 8935???????? | // 763b | add esi, 4 // ff15???????? | condition: 7 of them and filesize < 1586176 }
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