Actor(s): Turla
There is no description at this point.
rule win_mosquito_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2026-09-17" version = "1" description = "Detects win.mosquito." 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.mosquito" malpedia_rule_date = "20260916" malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6" malpedia_version = "20260917" 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 = { 99 52 50 6a00 6801c1fd7d } // n = 5, score = 400 // 99 | cdq // 52 | push edx // 50 | push eax // 6a00 | push 0 // 6801c1fd7d | push 0x7dfdc101 $sequence_1 = { f7d8 1bc0 83e0b4 83c04c } // n = 4, score = 400 // f7d8 | neg eax // 1bc0 | sbb eax, eax // 83e0b4 | and eax, 0xffffffb4 // 83c04c | add eax, 0x4c $sequence_2 = { f3a5 ff942464020000 81c450020000 85c0 } // n = 4, score = 400 // f3a5 | rep movsd dword ptr es:[edi], dword ptr [esi] // ff942464020000 | call dword ptr [esp + 0x264] // 81c450020000 | add esp, 0x250 // 85c0 | test eax, eax $sequence_3 = { e8???????? 6a20 8bf0 e8???????? 8bc8 } // n = 5, score = 300 // e8???????? | // 6a20 | push 0x20 // 8bf0 | mov esi, eax // e8???????? | // 8bc8 | mov ecx, eax $sequence_4 = { ff5220 ff75f8 e8???????? 59 b880000000 } // n = 5, score = 300 // ff5220 | call dword ptr [edx + 0x20] // ff75f8 | push dword ptr [ebp - 8] // e8???????? | // 59 | pop ecx // b880000000 | mov eax, 0x80 $sequence_5 = { 8bfc f3a5 ff942460020000 81c450020000 } // n = 4, score = 300 // 8bfc | mov edi, esp // f3a5 | rep movsd dword ptr es:[edi], dword ptr [esi] // ff942460020000 | call dword ptr [esp + 0x260] // 81c450020000 | add esp, 0x250 $sequence_6 = { 8b01 57 ff10 8d4e2a 83611000 83791408 7204 } // n = 7, score = 300 // 8b01 | mov eax, dword ptr [ecx] // 57 | push edi // ff10 | call dword ptr [eax] // 8d4e2a | lea ecx, [esi + 0x2a] // 83611000 | and dword ptr [ecx + 0x10], 0 // 83791408 | cmp dword ptr [ecx + 0x14], 8 // 7204 | jb 6 $sequence_7 = { 8b4508 03c1 8b4d10 8d0c41 e8???????? 59 } // n = 6, score = 300 // 8b4508 | mov eax, dword ptr [ebp + 8] // 03c1 | add eax, ecx // 8b4d10 | mov ecx, dword ptr [ebp + 0x10] // 8d0c41 | lea ecx, [ecx + eax*2] // e8???????? | // 59 | pop ecx $sequence_8 = { e8???????? 6a20 8bd8 e8???????? 8bc8 } // n = 5, score = 200 // e8???????? | // 6a20 | push 0x20 // 8bd8 | mov ebx, eax // e8???????? | // 8bc8 | mov ecx, eax $sequence_9 = { 0000 0001 1001 c550f0 8b8078005900 } // n = 5, score = 200 // 0000 | add byte ptr [eax], al // 0001 | add byte ptr [ecx], al // 1001 | adc byte ptr [ecx], al // c550f0 | lds edx, ptr [eax - 0x10] // 8b8078005900 | mov eax, dword ptr [eax + 0x590078] $sequence_10 = { 0000 006301 1000 7500 } // n = 4, score = 200 // 0000 | add byte ptr [eax], al // 006301 | add byte ptr [ebx + 1], ah // 1000 | adc byte ptr [eax], al // 7500 | jne 2 $sequence_11 = { 51 8b55fc 52 8b45f8 50 ff15???????? 8b4dfc } // n = 7, score = 200 // 51 | push ecx // 8b55fc | mov edx, dword ptr [ebp - 4] // 52 | push edx // 8b45f8 | mov eax, dword ptr [ebp - 8] // 50 | push eax // ff15???????? | // 8b4dfc | mov ecx, dword ptr [ebp - 4] $sequence_12 = { 0000 006500 676c 0010 } // n = 4, score = 200 // 0000 | add byte ptr [eax], al // 006500 | add byte ptr [ebp], ah // 676c | insb byte ptr es:[di], dx // 0010 | add byte ptr [eax], dl $sequence_13 = { 0000 00748078 3001 40 } // n = 4, score = 200 // 0000 | add byte ptr [eax], al // 00748078 | add byte ptr [eax + eax*4 + 0x78], dh // 3001 | xor byte ptr [ecx], al // 40 | inc eax $sequence_14 = { 0000 00645657 8b7dc2 0400 } // n = 4, score = 200 // 0000 | add byte ptr [eax], al // 00645657 | add byte ptr [esi + edx*2 + 0x57], ah // 8b7dc2 | mov edi, dword ptr [ebp - 0x3e] // 0400 | add al, 0 $sequence_15 = { 6801c1fd7d e8???????? 8bd8 eb02 } // n = 4, score = 200 // 6801c1fd7d | push 0x7dfdc101 // e8???????? | // 8bd8 | mov ebx, eax // eb02 | jmp 4 $sequence_16 = { 6824080000 50 e8???????? 83c410 } // n = 4, score = 200 // 6824080000 | push 0x824 // 50 | push eax // e8???????? | // 83c410 | add esp, 0x10 $sequence_17 = { 0000 0032 08804d086440 5e } // n = 4, score = 200 // 0000 | add byte ptr [eax], al // 0032 | add byte ptr [edx], dh // 08804d086440 | or byte ptr [eax + 0x4064084d], al // 5e | pop esi $sequence_18 = { 0000 0018 a0???????? 57 } // n = 4, score = 200 // 0000 | add byte ptr [eax], al // 0018 | add byte ptr [eax], bl // a0???????? | // 57 | push edi condition: 7 of them and filesize < 1015808 }
import "pe" rule win_mosquito_w0 { meta: description = "Detects malware sample from Turla Mosquito report" author = "Florian Roth" reference = "https://www.welivesecurity.com/wp-content/uploads/2018/01/ESET_Turla_Mosquito.pdf" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mosquito" malpedia_version = "20180301" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $s1 = ".?AVFileNameParseException@ExecuteFile@@" fullword ascii $s3 = "no_address" fullword wide $s6 = "SRRRQP" fullword ascii $s7 = "QWVPQQ" fullword ascii condition: pe.imphash() == "cd918073f209c5da7a16b6c125d73746" or all of them }
rule win_mosquito_w1 { meta: description = "Detects malware sample from Turla Mosquito report" author = "Florian Roth" reference = "https://www.welivesecurity.com/wp-content/uploads/2018/01/ESET_Turla_Mosquito.pdf" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mosquito" malpedia_version = "20180301" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $a1 = "/scripts/m/query.php?id=" fullword wide $a2 = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36" fullword wide $a3 = "GetUserNameW fails" fullword wide $s1 = "QVSWQQ" fullword ascii $s2 = "SRRRQP" fullword ascii $s3 = "QSVVQQ" fullword ascii condition: 2 of ($a*) or 4 of them }
import "pe" rule win_mosquito_w2 { meta: description = "Detects malware sample from Turla Mosquito report" author = "Florian Roth" reference = "https://www.welivesecurity.com/wp-content/uploads/2018/01/ESET_Turla_Mosquito.pdf" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mosquito" malpedia_version = "20180301" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $x1 = "Logger32.dll" fullword ascii $s6 = "lManager::Execute : CPalExceptio" fullword wide $s19 = "CCommandSender::operator(" fullword wide condition: pe.imphash() == "073235ae6dfbb1bf5db68a039a7b7726" or 2 of them }
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