Actor(s): WildNeutron
There is no description at this point.
rule win_jripbot_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-01-25" version = "1" description = "Detects win.jripbot." 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.jripbot" malpedia_rule_date = "20230124" malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686" malpedia_version = "20230125" 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 = { 8bf8 85ff 0f85c8000000 33f6 46 8975e8 8975f4 } // n = 7, score = 100 // 8bf8 | mov edi, eax // 85ff | test edi, edi // 0f85c8000000 | jne 0xce // 33f6 | xor esi, esi // 46 | inc esi // 8975e8 | mov dword ptr [ebp - 0x18], esi // 8975f4 | mov dword ptr [ebp - 0xc], esi $sequence_1 = { ffd3 8d85f0fdffff 83c414 8d4802 668b10 83c002 663bd7 } // n = 7, score = 100 // ffd3 | call ebx // 8d85f0fdffff | lea eax, [ebp - 0x210] // 83c414 | add esp, 0x14 // 8d4802 | lea ecx, [eax + 2] // 668b10 | mov dx, word ptr [eax] // 83c002 | add eax, 2 // 663bd7 | cmp dx, di $sequence_2 = { b88086ffff 5f 5e 5b c9 c3 55 } // n = 7, score = 100 // b88086ffff | mov eax, 0xffff8680 // 5f | pop edi // 5e | pop esi // 5b | pop ebx // c9 | leave // c3 | ret // 55 | push ebp $sequence_3 = { 6a10 50 53 ff74243c } // n = 4, score = 100 // 6a10 | push 0x10 // 50 | push eax // 53 | push ebx // ff74243c | push dword ptr [esp + 0x3c] $sequence_4 = { a1???????? 83c40c 85c0 743b 50 be???????? e8???????? } // n = 7, score = 100 // a1???????? | // 83c40c | add esp, 0xc // 85c0 | test eax, eax // 743b | je 0x3d // 50 | push eax // be???????? | // e8???????? | $sequence_5 = { 753a 57 ff15???????? 8d85f0fdffff 50 ff15???????? ffb5d0fbffff } // n = 7, score = 100 // 753a | jne 0x3c // 57 | push edi // ff15???????? | // 8d85f0fdffff | lea eax, [ebp - 0x210] // 50 | push eax // ff15???????? | // ffb5d0fbffff | push dword ptr [ebp - 0x430] $sequence_6 = { 83c002 663bcb 75f5 2bc6 d1f8 8d0c00 8b85e0fbffff } // n = 7, score = 100 // 83c002 | add eax, 2 // 663bcb | cmp cx, bx // 75f5 | jne 0xfffffff7 // 2bc6 | sub eax, esi // d1f8 | sar eax, 1 // 8d0c00 | lea ecx, [eax + eax] // 8b85e0fbffff | mov eax, dword ptr [ebp - 0x420] $sequence_7 = { 8bec 51 53 33db 3bf3 0f8496000000 8b4e10 } // n = 7, score = 100 // 8bec | mov ebp, esp // 51 | push ecx // 53 | push ebx // 33db | xor ebx, ebx // 3bf3 | cmp esi, ebx // 0f8496000000 | je 0x9c // 8b4e10 | mov ecx, dword ptr [esi + 0x10] $sequence_8 = { 1bc0 83d8ff 3bc7 7415 53 } // n = 5, score = 100 // 1bc0 | sbb eax, eax // 83d8ff | sbb eax, -1 // 3bc7 | cmp eax, edi // 7415 | je 0x17 // 53 | push ebx $sequence_9 = { 3b4804 7407 b880bfffff 5d c3 ff751c 8b5518 } // n = 7, score = 100 // 3b4804 | cmp ecx, dword ptr [eax + 4] // 7407 | je 9 // b880bfffff | mov eax, 0xffffbf80 // 5d | pop ebp // c3 | ret // ff751c | push dword ptr [ebp + 0x1c] // 8b5518 | mov edx, dword ptr [ebp + 0x18] condition: 7 of them and filesize < 507904 }
rule win_jripbot_w0 { meta: author = "Florian Roth" reference = "https://securelist.com/blog/research/71275/wild-neutron-economic-espionage-threat-actor-returns-with-new-tricks/" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.jripbot" malpedia_version = "20180301" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $s0 = "LiveUpdater.exe" fullword wide /* PEStudio Blacklist: strings */ /* score: '25.00' */ $s1 = "id-at-postalAddress" fullword ascii /* PEStudio Blacklist: strings */ /* score: '18.00' */ $s2 = "%d -> %d (default)" fullword wide /* PEStudio Blacklist: strings */ /* score: '17.00' */ $s3 = "%s%s%s=%d,%s=%d,%s=%d," fullword wide /* score: '15.00' */ $s8 = "id-ce-keyUsage" fullword ascii /* score: '12.00' */ $s9 = "Key Usage" fullword ascii /* score: '12.00' */ $s32 = "UPDATE_ID" fullword wide /* PEStudio Blacklist: strings */ /* score: '9.00' */ $s37 = "id-at-commonName" fullword ascii /* score: '8.00' */ $s38 = "2008R2" fullword wide /* PEStudio Blacklist: os */ /* score: '8.00' */ $s39 = "RSA-alt" fullword ascii /* PEStudio Blacklist: strings */ /* score: '8.00' */ $s40 = "%02d.%04d.%s" fullword wide /* score: '7.02' */ condition: all of them }
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