Actor(s): Turla Group
There is no description at this point.
rule win_satellite_turla_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2022-05-16" version = "1" description = "Detects win.satellite_turla." 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.satellite_turla" malpedia_rule_date = "20220513" malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26" malpedia_version = "20220516" 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 = { 0105???????? 81c3b0020000 2945e0 75ae 837dd400 } // n = 5, score = 200 // 0105???????? | // 81c3b0020000 | add ebx, 0x2b0 // 2945e0 | sub dword ptr [ebp - 0x20], eax // 75ae | jne 0xffffffb0 // 837dd400 | cmp dword ptr [ebp - 0x2c], 0 $sequence_1 = { 0108 833e00 7fc7 db46fc } // n = 4, score = 200 // 0108 | add dword ptr [eax], ecx // 833e00 | cmp dword ptr [esi], 0 // 7fc7 | jg 0xffffffc9 // db46fc | fild dword ptr [esi - 4] $sequence_2 = { 0105???????? 83c410 29442418 75a9 } // n = 4, score = 200 // 0105???????? | // 83c410 | add esp, 0x10 // 29442418 | sub dword ptr [esp + 0x18], eax // 75a9 | jne 0xffffffab $sequence_3 = { 0105???????? 83c410 29442420 75aa } // n = 4, score = 200 // 0105???????? | // 83c410 | add esp, 0x10 // 29442420 | sub dword ptr [esp + 0x20], eax // 75aa | jne 0xffffffac $sequence_4 = { 0108 833a00 7c23 8b442428 } // n = 4, score = 200 // 0108 | add dword ptr [eax], ecx // 833a00 | cmp dword ptr [edx], 0 // 7c23 | jl 0x25 // 8b442428 | mov eax, dword ptr [esp + 0x28] $sequence_5 = { 0108 833e00 7c1f 8b542410 } // n = 4, score = 200 // 0108 | add dword ptr [eax], ecx // 833e00 | cmp dword ptr [esi], 0 // 7c1f | jl 0x21 // 8b542410 | mov edx, dword ptr [esp + 0x10] $sequence_6 = { 51 8d9424c0030000 52 e8???????? 83c414 8bc6 8b8c24bc060000 } // n = 7, score = 200 // 51 | push ecx // 8d9424c0030000 | lea edx, [esp + 0x3c0] // 52 | push edx // e8???????? | // 83c414 | add esp, 0x14 // 8bc6 | mov eax, esi // 8b8c24bc060000 | mov ecx, dword ptr [esp + 0x6bc] $sequence_7 = { 0108 833e00 7cc7 7e39 } // n = 4, score = 200 // 0108 | add dword ptr [eax], ecx // 833e00 | cmp dword ptr [esi], 0 // 7cc7 | jl 0xffffffc9 // 7e39 | jle 0x3b $sequence_8 = { 6a6a 8d45a8 6a10 50 } // n = 4, score = 100 // 6a6a | push 0x6a // 8d45a8 | lea eax, [ebp - 0x58] // 6a10 | push 0x10 // 50 | push eax $sequence_9 = { 6a02 53 56 56 } // n = 4, score = 100 // 6a02 | push 2 // 53 | push ebx // 56 | push esi // 56 | push esi $sequence_10 = { ff15???????? ff15???????? 56 56 ff15???????? 56 } // n = 6, score = 100 // ff15???????? | // ff15???????? | // 56 | push esi // 56 | push esi // ff15???????? | // 56 | push esi $sequence_11 = { 57 ffd6 a3???????? 6a0d 8d45e8 } // n = 5, score = 100 // 57 | push edi // ffd6 | call esi // a3???????? | // 6a0d | push 0xd // 8d45e8 | lea eax, [ebp - 0x18] $sequence_12 = { e8???????? 8d85ecfdffff 6804010000 50 } // n = 4, score = 100 // e8???????? | // 8d85ecfdffff | lea eax, [ebp - 0x214] // 6804010000 | push 0x104 // 50 | push eax $sequence_13 = { 33c0 8dbdedfdffff 889decfdffff f3ab 66ab aa e8???????? } // n = 7, score = 100 // 33c0 | xor eax, eax // 8dbdedfdffff | lea edi, [ebp - 0x213] // 889decfdffff | mov byte ptr [ebp - 0x214], bl // f3ab | rep stosd dword ptr es:[edi], eax // 66ab | stosw word ptr es:[edi], ax // aa | stosb byte ptr es:[edi], al // e8???????? | $sequence_14 = { 6a0b 33c0 59 8dbd70ffffff 89b56cffffff f3ab 8d856cffffff } // n = 7, score = 100 // 6a0b | push 0xb // 33c0 | xor eax, eax // 59 | pop ecx // 8dbd70ffffff | lea edi, [ebp - 0x90] // 89b56cffffff | mov dword ptr [ebp - 0x94], esi // f3ab | rep stosd dword ptr es:[edi], eax // 8d856cffffff | lea eax, [ebp - 0x94] $sequence_15 = { ff15???????? 50 8945fc e8???????? ff75fc } // n = 5, score = 100 // ff15???????? | // 50 | push eax // 8945fc | mov dword ptr [ebp - 4], eax // e8???????? | // ff75fc | push dword ptr [ebp - 4] condition: 7 of them and filesize < 1040384 }
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