Actor(s): TA505
Cisco Talos reports that this is a data exfiltration tool used by TA505.
rule win_teleport_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-07-11" version = "1" description = "Detects win.teleport." 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.teleport" malpedia_rule_date = "20230705" malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41" malpedia_version = "20230715" 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 = { 895048 33ca 89484c 894df8 8b45f8 c1e810 0fb6c0 } // n = 7, score = 100 // 895048 | mov dword ptr [eax + 0x48], edx // 33ca | xor ecx, edx // 89484c | mov dword ptr [eax + 0x4c], ecx // 894df8 | mov dword ptr [ebp - 8], ecx // 8b45f8 | mov eax, dword ptr [ebp - 8] // c1e810 | shr eax, 0x10 // 0fb6c0 | movzx eax, al $sequence_1 = { 740d 8b4304 837810ff 0f8591feffff 57 ff15???????? 8b4df4 } // n = 7, score = 100 // 740d | je 0xf // 8b4304 | mov eax, dword ptr [ebx + 4] // 837810ff | cmp dword ptr [eax + 0x10], -1 // 0f8591feffff | jne 0xfffffe97 // 57 | push edi // ff15???????? | // 8b4df4 | mov ecx, dword ptr [ebp - 0xc] $sequence_2 = { 8d8de0feffff 50 e8???????? 8b8508ffffff 0d00010000 84c0 7919 } // n = 7, score = 100 // 8d8de0feffff | lea ecx, [ebp - 0x120] // 50 | push eax // e8???????? | // 8b8508ffffff | mov eax, dword ptr [ebp - 0xf8] // 0d00010000 | or eax, 0x100 // 84c0 | test al, al // 7919 | jns 0x1b $sequence_3 = { 8d8500ffffff 894dfc 8d5912 eb50 c785f8feffff80b54200 e8???????? 898538ffffff } // n = 7, score = 100 // 8d8500ffffff | lea eax, [ebp - 0x100] // 894dfc | mov dword ptr [ebp - 4], ecx // 8d5912 | lea ebx, [ecx + 0x12] // eb50 | jmp 0x52 // c785f8feffff80b54200 | mov dword ptr [ebp - 0x108], 0x42b580 // e8???????? | // 898538ffffff | mov dword ptr [ebp - 0xc8], eax $sequence_4 = { 0bc1 8a850fffffff 75e6 8ad0 c0ea03 a807 7403 } // n = 7, score = 100 // 0bc1 | or eax, ecx // 8a850fffffff | mov al, byte ptr [ebp - 0xf1] // 75e6 | jne 0xffffffe8 // 8ad0 | mov dl, al // c0ea03 | shr dl, 3 // a807 | test al, 7 // 7403 | je 5 $sequence_5 = { c7401807000000 66894804 8908 897020 894824 c6401c01 8d85f0feffff } // n = 7, score = 100 // c7401807000000 | mov dword ptr [eax + 0x18], 7 // 66894804 | mov word ptr [eax + 4], cx // 8908 | mov dword ptr [eax], ecx // 897020 | mov dword ptr [eax + 0x20], esi // 894824 | mov dword ptr [eax + 0x24], ecx // c6401c01 | mov byte ptr [eax + 0x1c], 1 // 8d85f0feffff | lea eax, [ebp - 0x110] $sequence_6 = { 331c85a0024300 0fb6c2 8b55e8 331c85a0f64200 335ffc 8bc3 c1e808 } // n = 7, score = 100 // 331c85a0024300 | xor ebx, dword ptr [eax*4 + 0x4302a0] // 0fb6c2 | movzx eax, dl // 8b55e8 | mov edx, dword ptr [ebp - 0x18] // 331c85a0f64200 | xor ebx, dword ptr [eax*4 + 0x42f6a0] // 335ffc | xor ebx, dword ptr [edi - 4] // 8bc3 | mov eax, ebx // c1e808 | shr eax, 8 $sequence_7 = { e8???????? 81cb00000002 899d44ffffff 68???????? 8d8d10ffffff c745fc18000000 e8???????? } // n = 7, score = 100 // e8???????? | // 81cb00000002 | or ebx, 0x2000000 // 899d44ffffff | mov dword ptr [ebp - 0xbc], ebx // 68???????? | // 8d8d10ffffff | lea ecx, [ebp - 0xf0] // c745fc18000000 | mov dword ptr [ebp - 4], 0x18 // e8???????? | $sequence_8 = { 0f85f2000000 8b95ccf7ffff 8bca 8d7902 6690 668b01 83c102 } // n = 7, score = 100 // 0f85f2000000 | jne 0xf8 // 8b95ccf7ffff | mov edx, dword ptr [ebp - 0x834] // 8bca | mov ecx, edx // 8d7902 | lea edi, [ecx + 2] // 6690 | nop // 668b01 | mov ax, word ptr [ecx] // 83c102 | add ecx, 2 $sequence_9 = { 770d 83bd20ffffff00 0f8425080000 8b7904 8bcf 56 e8???????? } // n = 7, score = 100 // 770d | ja 0xf // 83bd20ffffff00 | cmp dword ptr [ebp - 0xe0], 0 // 0f8425080000 | je 0x82b // 8b7904 | mov edi, dword ptr [ecx + 4] // 8bcf | mov ecx, edi // 56 | push esi // e8???????? | condition: 7 of them and filesize < 458752 }
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