Created
April 9, 2023 19:58
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TA505 Loader & HVNC String Decryption
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from malduck.ints import UInt8 | |
def str_decrypt(str_list: list, param: int): | |
for s in str_list: | |
x = UInt8(ord(s[1]) - 0x61) | |
y = UInt8((ord(s[0]) - 1) << 4) | |
z = x | y | |
i = 3 | |
result = '' | |
while i <= len(s) - 1: | |
y = UInt8(ord(s[i - 1]) << 4) | |
a = UInt8(y - 0x10) | UInt8(ord(s[i]) - 0x61) | |
b = a ^ z ^ param # 0xc7 => 199 => first octet from DNSQuery to aav.download-cdn.com | |
result += chr(b) | |
i += 2 | |
print(result) | |
# Incomplete List just for testing | |
loader_strings = ['hcnonamhnlnanjigihjlnbnjnj', | |
'pchaeneffeflfbhafledfmehfkflfifaflebggebehfmflfceggc', | |
'hloknfmomimjnnnapnnanandnp', | |
'chlgijjcjejfibimkgjcifif', | |
'cjjjihiaihiailjkmaikicic', | |
'dklejdijjiipjdjiijlcinjijdlm', | |
'opgbegfmenfkegenfmglehegegenelfmgj', | |
'cjkgjkjkjokbjoilialmiljpjliljnjkkp', | |
'hcpmnlmbnamhnlnambognambpkmfmbnmnknlpe', | |
'nbfogcgcggefhdhihceehdghgdhdgfgcfh', | |
'ijahcadkcldmcacldkbmclcpckaichcccl', | |
'maeogjhdgchfgjgchdeeglgihegcepgggjgdglgc', | |
'iaaocjddccdfcjccddaedfcgcecmbcdfclag', | |
'jcbncbcbcfaecadachcmbmdldddkbe', | |
'pjfbfcflanambafkfcfc', | |
'kncjafcdaeadboadalagadbaapcpbc', | |
'lfabagbdaaagfcfafafcaaahbmbgboboebeafmbhakbhfcfa', | |
'kmejehcpahahdjaoamacbibpaobjdiaobjbnaobjgggbapaoaheleecneleedkelejeoflejgggb', | |
'noekgagkgnhmhe', | |
'bellkhkhkdkaojpmpmlblklnlclnlalgpolalplmkglhpnlalmlopmkdlplmlclhpm', | |
'npelfhfoemepfjekfneeffhbhlgkhhglhhhogmeeephbhghmhhgpgldifgemeeflgngkgkhnhggmeohngkglhbhhhgeeephbhghmhhgpgl', | |
'ejmcolojoponphmkpmohpiolpmmdobokol', | |
'nkfffjfafe', | |
'apkmpoppplplplpopa', | |
'bnijjfjmioinjliijp', | |
'fjndmnnh', | |
'ongoegeggdeefjfoelegeg', | |
'gnpkofpjpo', | |
'fbnbndmc', | |
'nnfceoeoekdfcldecl', | |
'onbcelbibdeiblbibj', | |
'mmddgjdidjgkgogidkdddlgodkddgodpdmdcdpdngogodldndidngidcdkgjgngkdp', | |
'kbbebdaiacakakfffeeiadboadegee', | |
'dcnhnjngmh', | |
'lfcccgeccb', | |
'hcofobiepi', | |
'onhkhoblbkgh', | |
'nndehihlgo', | |
'jbhiddcodd', | |
'fapcopohplpiofpcofljpcoppclhlf', | |
'ghpdmpmgnenhmbncmfpmonmjmdncmpndmpmgnepmphmjmomempnhndpmodnfncncmfmonepgmfncndmjmpmopmpcnfmo', | |
'ebmlopofpeojpfojoapcmdocobodmhpdpcojmkohpdoiofoonjlplplplglflfocoeoclolcodldloldlblfoaodlblpldldoflaoalflglboflhlo', | |
'jjhlaoambbbjambpbdbkbpakbphlac', | |
'akkokakjodkilfkionockoonoflnkekdkkonockdonpmpnonpmpppkodpnodpnodpmoeonolonofkjkikbonocilonocjmonop', | |
'jehbhkhdhfhdhlcachdccbchhdhbhbhdhb', | |
'hcjhjm'] | |
# Incomplete List just for testing | |
hvnc_strings = [ | |
'eohlhlhdhphihbhlhjhchihehchfhihdhghhhehphdhahmhjhhhehihfhhhfhmhhhp', | |
'lkiailihimidinipidieieicjjikihifjjimilicifieihicigimigiaibigipimik', | |
'ocnlndnfnanoncnpneninininpnmnlndnlnnngnannnjncnennngndnenlnmnpninf', | |
'ekhhhchlhahbhphlhmhghohihmhihghmhbhfhmhphhhchghnhlhmhphogjhohchhhh', | |
'ialclflblalbljkdlbkdlflclhlplilolllolalplllilglglmlhlolclolalflpla', | |
'ekhbhhhphihhhchhhghkhphmhghphlhnhnhohkhahdhhhehbhhhphhhchnhhhihihn', | |
'bbceckcacnckclcpcdchcocacnckdccicacacocgcbcmcfcbcmcddccmcgcncgcidc', | |
'hfejeceeeafgededepeoeceneeepeoelejfgeneeemelejejeieaeheiekeeeaefek', | |
'opnemmnlnanknenlnkncnenonlmmngninjncngnlnbninlndnjnfnnmmmmnnnknanc', | |
'nboaooomolohololoeoeoaonolooooojomoiomohpconofoiokojofomonodpcodob', | |
'jdkdkkkfkmkglakmlakmkfkckekkkkkfkokmkmlakkkdkckmknkkklkgkdkgkgkokf', | |
'apdkdfdedhdndhdkdddodhdbdhdgdddgcmdpdecmdkdldpdbdedkdgdcdbdcdkcmdf', | |
'naoionoaoaolohokoeomoboeologonobobocohohomojojononocomoeofpdpdofoj', | |
'niokogoaogobobogogonohopopoeomogodplobohoeocogocplojoeonofonobocod', | |
'mfonkdkbkpkppckppekallkokfkckfllkcpfkekallkpphpekallkdpckephpckfkpkokokcpfpdolliooogpp', | |
'fbhjgdgddkdddagaghghcpdlghdldacpdgdkgagdcpdldhdfdccpdhgegdgedcgbgeghdadhdfdkhpcmhkhcgl', | |
'dmbefkfgakaofkajfnfgecfjakaofgecflfpanfkecfhfmamalecfgfmfifnflfganfpfpfoakfobcebbhbpag', | |
'gfenfcaofcfcfaffaefhblapabfcapblacffaaagblaofeadafbladfdfcfcaeapapfeaaaaabacelbieoegfp', | |
'bkdchockhnhlcmcmcihigeclhkcmhngehnclcmhngecihmhpcpgehbhlcihmhbhmhlclhihlcnckdeghdbdjca', | |
'ngpoohlgoalmldohlaodkiohlaohodkilnohlblnkilnlbldohkilalhodlblglflgldlaoalnlfpiklpnpfom', | |
'kbijjhjamdjejamhmfjanpjbjdmbjgnpmgmemamgnpjdmkmgmdnpmfmamkjejgjamamkmgmhmhjeipnmikicjl', | |
'dbbjfffefhflfeahfbfcepahabagaaepfgffffadepflfdaeagepabfcfkaefafcfdfkagaefdadbpembkbcal', | |
'pppmnomdmkmfmamjnpid', | |
'iojekoiplilblmkjleklli', | |
'hphmenfiee', | |
'mmlnlplcpbpalconpkpcpaolpklplcoponpapjpgpdpklpln', | |
'gkfpfaelfmfpfgebbhfmebfm', | |
'cgdibkapbmbjbjbedgbkbiafbkagbmabbkahccbmblbbbkacdgbjbeagag', | |
'pjpgnjnomfnimlmnmp', | |
'lplaijjejiijicjpifidicjp', | |
'kojojmjojfjimp', | |
'hoeoemeoefei', | |
'ffgcghhcghhegdhggjhehcgpgigb', | |
'bfclcpcicpccddcldgdf', | |
'khihjmjfjajbignjjhjfjhjmjb', | |
'bkafcgckcccmcn', | |
'kcknibidjejhicnpjlic', | |
'njkikkkhoeofompiolohopohoppionodoeonkkkhoeofocoloeonpiopojofpmoppipdkkkhoeofohoppionopkkkioloiofpppolaoiogoloeob', | |
'gmfgfkehepfdfaenfkbbfkehfk', | |
'ccccdodhcfcgdacddecndmbibcadboacbobhafcncgbibpbfboagacfbdpcfcndcaeadadbebpafchbeadacbibobp'] | |
str_decrypt(loader_strings, 0xc7) | |
print('-' * 80) | |
str_decrypt(hvnc_strings, 0x53) |
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