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rule win_alice_atm_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-03-28" version = "1" description = "Detects win.alice_atm." 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.alice_atm" malpedia_rule_date = "20230328" malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d" malpedia_version = "20230407" 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 = { 4b 75d4 ff75f8 e8???????? } // n = 4, score = 100 // 4b | dec ebx // 75d4 | jne 0xffffffd6 // ff75f8 | push dword ptr [ebp - 8] // e8???????? | $sequence_1 = { 83c4f4 53 56 57 33ff 897dfc } // n = 6, score = 100 // 83c4f4 | add esp, -0xc // 53 | push ebx // 56 | push esi // 57 | push edi // 33ff | xor edi, edi // 897dfc | mov dword ptr [ebp - 4], edi $sequence_2 = { e8???????? 6a00 ff7508 e8???????? 8b45fc } // n = 5, score = 100 // e8???????? | // 6a00 | push 0 // ff7508 | push dword ptr [ebp + 8] // e8???????? | // 8b45fc | mov eax, dword ptr [ebp - 4] $sequence_3 = { 83c604 33ff 47 3b7d0c 741b ff36 57 } // n = 7, score = 100 // 83c604 | add esi, 4 // 33ff | xor edi, edi // 47 | inc edi // 3b7d0c | cmp edi, dword ptr [ebp + 0xc] // 741b | je 0x1d // ff36 | push dword ptr [esi] // 57 | push edi $sequence_4 = { 751c 6810000100 68c8000000 ff7508 e8???????? 6a00 } // n = 6, score = 100 // 751c | jne 0x1e // 6810000100 | push 0x10010 // 68c8000000 | push 0xc8 // ff7508 | push dword ptr [ebp + 8] // e8???????? | // 6a00 | push 0 $sequence_5 = { 57 33c0 8945fc 8b5d08 0bdb } // n = 5, score = 100 // 57 | push edi // 33c0 | xor eax, eax // 8945fc | mov dword ptr [ebp - 4], eax // 8b5d08 | mov ebx, dword ptr [ebp + 8] // 0bdb | or ebx, ebx $sequence_6 = { ff15???????? 0bc0 742a 8bd8 833d????????00 740b } // n = 6, score = 100 // ff15???????? | // 0bc0 | or eax, eax // 742a | je 0x2c // 8bd8 | mov ebx, eax // 833d????????00 | // 740b | je 0xd $sequence_7 = { 50 e8???????? 83c40c ff75f0 68???????? } // n = 5, score = 100 // 50 | push eax // e8???????? | // 83c40c | add esp, 0xc // ff75f0 | push dword ptr [ebp - 0x10] // 68???????? | $sequence_8 = { ff7508 e8???????? 397dfc 743b } // n = 4, score = 100 // ff7508 | push dword ptr [ebp + 8] // e8???????? | // 397dfc | cmp dword ptr [ebp - 4], edi // 743b | je 0x3d $sequence_9 = { 817e0c20202000 0f8480000000 ff36 68???????? 8d45f8 } // n = 5, score = 100 // 817e0c20202000 | cmp dword ptr [esi + 0xc], 0x202020 // 0f8480000000 | je 0x86 // ff36 | push dword ptr [esi] // 68???????? | // 8d45f8 | lea eax, [ebp - 8] condition: 7 of them and filesize < 49152 }
rule win_alice_atm_w0 { meta: description = "Detects of ATM Malware ALICE" author = "Frank Boldewin (@r3c0nst)" reference = "https://twitter.com/r3c0nst/status/1215265889844637696" date = "2020-01-09" hash = "6b2fac8331e4b3e108aa829b297347f686ade233b24d94d881dc4eff81b9eb30" source = "https://raw.githubusercontent.com/fboldewin/YARA-rules/master/ATM.Malware.ALICE.yar" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.alice_atm" malpedia_version = "20200113" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $String1 = "Project Alice" ascii nocase $String2 = "Can't dispense requested amount." ascii nocase $String3 = "Selected cassette is unavailable" ascii nocase $String4 = "ATM update manager" wide nocase $String5 = "Input PIN-code for access" wide nocase $String6 = "Supervisor ID" wide nocase $Code1 = {50 68 08 07 00 00 6A 00 FF 75 0C FF 75 08 E8} // Get Cash Unit Info $Code2 = {50 6A 00 FF 75 10 FF 75 0C FF 75 08 E8} // Dispense Cash $Code3 = {68 ?? ?? ?? ?? 53 E8 ?? ?? ?? ?? 0B C0 75 29 6A} // Check Supervisor ID condition: uint16(0) == 0x5A4D and filesize < 200KB and 4 of ($String*) and all of ($Code*) }
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