Actor(s): Lazarus Group
There is no description at this point.
rule win_hermes_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-07-11" version = "1" description = "Detects win.hermes." 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.hermes" 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 = { 8b4508 83c801 50 6a01 ff75fc } // n = 5, score = 200 // 8b4508 | mov eax, dword ptr [ebp + 8] // 83c801 | or eax, 1 // 50 | push eax // 6a01 | push 1 // ff75fc | push dword ptr [ebp - 4] $sequence_1 = { 83c801 50 6a01 ff75fc } // n = 4, score = 200 // 83c801 | or eax, 1 // 50 | push eax // 6a01 | push 1 // ff75fc | push dword ptr [ebp - 4] $sequence_2 = { 50 8b4508 83c801 50 6a01 ff75fc ff15???????? } // n = 7, score = 200 // 50 | push eax // 8b4508 | mov eax, dword ptr [ebp + 8] // 83c801 | or eax, 1 // 50 | push eax // 6a01 | push 1 // ff75fc | push dword ptr [ebp - 4] // ff15???????? | $sequence_3 = { 50 8b4508 83c801 50 } // n = 4, score = 200 // 50 | push eax // 8b4508 | mov eax, dword ptr [ebp + 8] // 83c801 | or eax, 1 // 50 | push eax $sequence_4 = { 6a04 6800100000 6888130000 6a00 ff15???????? } // n = 5, score = 200 // 6a04 | push 4 // 6800100000 | push 0x1000 // 6888130000 | push 0x1388 // 6a00 | push 0 // ff15???????? | $sequence_5 = { ff15???????? 33d2 6a79 59 f7f1 83c261 } // n = 6, score = 200 // ff15???????? | // 33d2 | xor edx, edx // 6a79 | push 0x79 // 59 | pop ecx // f7f1 | div ecx // 83c261 | add edx, 0x61 $sequence_6 = { 6810660000 ff75fc ff15???????? 85c0 } // n = 4, score = 200 // 6810660000 | push 0x6610 // ff75fc | push dword ptr [ebp - 4] // ff15???????? | // 85c0 | test eax, eax $sequence_7 = { 33d2 6a79 59 f7f1 83c261 } // n = 5, score = 200 // 33d2 | xor edx, edx // 6a79 | push 0x79 // 59 | pop ecx // f7f1 | div ecx // 83c261 | add edx, 0x61 $sequence_8 = { 7508 6a01 ff15???????? 8d45fc 50 } // n = 5, score = 200 // 7508 | jne 0xa // 6a01 | push 1 // ff15???????? | // 8d45fc | lea eax, [ebp - 4] // 50 | push eax $sequence_9 = { 6a01 6810660000 ff75fc ff15???????? } // n = 4, score = 200 // 6a01 | push 1 // 6810660000 | push 0x6610 // ff75fc | push dword ptr [ebp - 4] // ff15???????? | condition: 7 of them and filesize < 7192576 }
rule win_hermes_w0 { meta: author = "BAE" reference = "https://baesystemsai.blogspot.de/2017/10/taiwan-heist-lazarus-tools.html" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.hermes" malpedia_version = "20180301" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: //in both version 2.1 and sample in Feb $s1 = "SYSTEM\\CurrentControlSet\\Control\\Nls\\Language\\" $s2 = "0419" $s3 = "0422" $s4 = "0423" //in version 2.1 only $S1 = "HERMES" $S2 = "vssadminn" $S3 = "finish work" $S4 = "testlib.dll" $S5 = "shadowstorageiet" //maybe unique in the file $u1 = "ALKnvfoi4tbmiom3t40iomfr0i3t4jmvri3tb4mvi3btv3rgt4t777" $u2 = "HERMES 2.1 TEST BUILD, press ok" $u3 = "hnKwtMcOadHwnXutKHqPvpgfysFXfAFTcaDHNdCnktA" //RSA Key part condition: all of ($s*) and 3 of ($S*) and 1 of ($u*) }
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