Analysis

  • max time kernel
    27s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    11-03-2021 17:26

General

  • Target

    dubi.exe

  • Size

    827KB

  • MD5

    648f0d37b65ec97fd1754d53d78a6a24

  • SHA1

    ba9c8a94d83f66f93523345aa7fe266cf9769a0e

  • SHA256

    894efce31cc70924a097c89b02eb544cb1303268b569f39ccbfba492d6c2b166

  • SHA512

    e222e2ef11a00605575bc8431587f9e89dbd6c3579f43cd36c97527385c85e837f831a583ede7a4c3413f6c0c8ff2139c4b1e4821224c6e4f57eb5cd18fe8410

Malware Config

Signatures

  • Taurus Stealer

    Taurus is an infostealer first seen in June 2020.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 10 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 2 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies system certificate store 2 TTPs 7 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 45 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dubi.exe
    "C:\Users\Admin\AppData\Local\Temp\dubi.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:544
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\d1fdfe2d-58b2-4e41-97f2-43df07868167" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:324
    • C:\Users\Admin\AppData\Local\Temp\dubi.exe
      "C:\Users\Admin\AppData\Local\Temp\dubi.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Loads dropped DLL
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1084
      • C:\Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\updatewin.exe
        "C:\Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\updatewin.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:836
        • C:\Windows\SysWOW64\cmd.exe
          /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\updatewin.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1888
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 3
            5⤵
            • Delays execution with timeout.exe
            PID:940
      • C:\Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\5.exe
        "C:\Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\5.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1744
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im 5.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\5.exe" & del C:\ProgramData\*.dll & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1428
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im 5.exe /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1708
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 6
            5⤵
            • Delays execution with timeout.exe
            PID:1608

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\ProgramData\freebl3.dll

    MD5

    ef2834ac4ee7d6724f255beaf527e635

    SHA1

    5be8c1e73a21b49f353c2ecfa4108e43a883cb7b

    SHA256

    a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba

    SHA512

    c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2

  • C:\ProgramData\mozglue.dll

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • C:\ProgramData\msvcp140.dll

    MD5

    109f0f02fd37c84bfc7508d4227d7ed5

    SHA1

    ef7420141bb15ac334d3964082361a460bfdb975

    SHA256

    334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

    SHA512

    46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

  • C:\ProgramData\nss3.dll

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • C:\ProgramData\softokn3.dll

    MD5

    a2ee53de9167bf0d6c019303b7ca84e5

    SHA1

    2a3c737fa1157e8483815e98b666408a18c0db42

    SHA256

    43536adef2ddcc811c28d35fa6ce3031029a2424ad393989db36169ff2995083

    SHA512

    45b56432244f86321fa88fbcca6a0d2a2f7f4e0648c1d7d7b1866adc9daa5eddd9f6bb73662149f279c9ab60930dad1113c8337cb5e6ec9eed5048322f65f7d8

  • C:\ProgramData\vcruntime140.dll

    MD5

    7587bf9cb4147022cd5681b015183046

    SHA1

    f2106306a8f6f0da5afb7fc765cfa0757ad5a628

    SHA256

    c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

    SHA512

    0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

    MD5

    1697c7bdbf51be4e8b5eed4bb2d96c99

    SHA1

    33e7137f57d09c30d99ac934f2f2dfb094e23bd3

    SHA256

    34458a706a2f38ec2e0d451ba4fc2692024cd23516e0ce136b09b29cfeec96c4

    SHA512

    294436f9930306e5afe604374eb932aaad1cd238df5e41a360f32ec0ece112e4e5d9ccf00529a36f2ea5010729dbe56e44ee0d52b2f36e4177c5652f3425038c

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    MD5

    61a03d15cf62612f50b74867090dbe79

    SHA1

    15228f34067b4b107e917bebaf17cc7c3c1280a8

    SHA256

    f9e23dc21553daa34c6eb778cd262831e466ce794f4bea48150e8d70d3e6af6d

    SHA512

    5fece89ccbbf994e4f1e3ef89a502f25a72f359d445c034682758d26f01d9f3aa20a43010b9a87f2687da7ba201476922aa46d4906d442d56eb59b2b881259d3

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

    MD5

    ca1458cdb08212fe95b8e013c0bd8dd5

    SHA1

    86d293812cb804c162e7de0e59c7094a83d92340

    SHA256

    2d2b9ee023d9b04c6ae09ad11c6963432ee7b3ab8858d42b4470170b749d3e2f

    SHA512

    3a25602303f7a8eb13f0de44573d57e0b8919ec1a031b3da49cb548d86c1ad9f214b04be22345fad7aca5dc060114c66e2272edfdfd20efd6925c67c43d99f09

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

    MD5

    c88a281e52acd2ede10f0d6124c314a9

    SHA1

    dc3c1c0ee45833adbba293fa80165480965ee7a6

    SHA256

    b9c558ced841e30f3ad935fdef9be558554429e9e0f210bcdffe037b9c81e51c

    SHA512

    6672c0846e1515cef9bd9212b6e495b4a0239c5f56eec6165dcec42e2fdd8c5cbffcc60a778c5bdabd74fc32feb3a23640bf11e61a1696d4d22d036303be33c3

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    MD5

    eaf951c9d7542fd3f9c2b5458f04d0f8

    SHA1

    7dbcc3550fb9beeef24339685139d9563a5838f4

    SHA256

    d203c89f10b8c9542eac4b5ebf9ea503231fd34e5386f1a4d599ebfdca071b8c

    SHA512

    254a27f3a304934c638360f02d5916010760d187bc336c964d67bf578366ca36ec45ac71d8a30d1d81b5e3542efba1f8d6beed84b44eaf9ba76f9e23ab73d6a4

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

    MD5

    8e63a4e60070eda238a404e432247ea6

    SHA1

    efbb1da3419176418c8595c27187f8b661dffae4

    SHA256

    3ea76f7a5af5362d2604c8dce224e20077efeaaee58b2be6422c3e7578e17f81

    SHA512

    f9fbe4d8939ee9ca438d9e9fc4c8f5f2ca7118acae52f15cb662325739e095d22c94b4ff5ab30bf34ca827e7dcd1bd6fae1a15e0f3536ff48cd9390dfc489905

  • C:\Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\5.exe

    MD5

    6a50d5e91b193be284aa02106ee35e97

    SHA1

    097137cb64eb18ce55c13f1e841d5312d07fbbf4

    SHA256

    82c1ccbd7db7615a982f7b8072784575972aff3f0ab4597efda9d2e7ca17b961

    SHA512

    7f79ef4c3b2cd32e6e1fe6c64d1a693115789665f705144cb912500f25f669f28ac61f709d29057b66bf2a6c1f8376b3a8ef7ccb95668cabf2d15455745f1f03

  • C:\Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\5.exe

    MD5

    6a50d5e91b193be284aa02106ee35e97

    SHA1

    097137cb64eb18ce55c13f1e841d5312d07fbbf4

    SHA256

    82c1ccbd7db7615a982f7b8072784575972aff3f0ab4597efda9d2e7ca17b961

    SHA512

    7f79ef4c3b2cd32e6e1fe6c64d1a693115789665f705144cb912500f25f669f28ac61f709d29057b66bf2a6c1f8376b3a8ef7ccb95668cabf2d15455745f1f03

  • C:\Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • C:\Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • C:\Users\Admin\AppData\Local\d1fdfe2d-58b2-4e41-97f2-43df07868167\dubi.exe

    MD5

    648f0d37b65ec97fd1754d53d78a6a24

    SHA1

    ba9c8a94d83f66f93523345aa7fe266cf9769a0e

    SHA256

    894efce31cc70924a097c89b02eb544cb1303268b569f39ccbfba492d6c2b166

    SHA512

    e222e2ef11a00605575bc8431587f9e89dbd6c3579f43cd36c97527385c85e837f831a583ede7a4c3413f6c0c8ff2139c4b1e4821224c6e4f57eb5cd18fe8410

  • \ProgramData\mozglue.dll

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\msvcp140.dll

    MD5

    109f0f02fd37c84bfc7508d4227d7ed5

    SHA1

    ef7420141bb15ac334d3964082361a460bfdb975

    SHA256

    334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

    SHA512

    46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

  • \ProgramData\nss3.dll

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • \ProgramData\vcruntime140.dll

    MD5

    7587bf9cb4147022cd5681b015183046

    SHA1

    f2106306a8f6f0da5afb7fc765cfa0757ad5a628

    SHA256

    c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

    SHA512

    0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

  • \Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\5.exe

    MD5

    6a50d5e91b193be284aa02106ee35e97

    SHA1

    097137cb64eb18ce55c13f1e841d5312d07fbbf4

    SHA256

    82c1ccbd7db7615a982f7b8072784575972aff3f0ab4597efda9d2e7ca17b961

    SHA512

    7f79ef4c3b2cd32e6e1fe6c64d1a693115789665f705144cb912500f25f669f28ac61f709d29057b66bf2a6c1f8376b3a8ef7ccb95668cabf2d15455745f1f03

  • \Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\5.exe

    MD5

    6a50d5e91b193be284aa02106ee35e97

    SHA1

    097137cb64eb18ce55c13f1e841d5312d07fbbf4

    SHA256

    82c1ccbd7db7615a982f7b8072784575972aff3f0ab4597efda9d2e7ca17b961

    SHA512

    7f79ef4c3b2cd32e6e1fe6c64d1a693115789665f705144cb912500f25f669f28ac61f709d29057b66bf2a6c1f8376b3a8ef7ccb95668cabf2d15455745f1f03

  • \Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • \Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • \Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • \Users\Admin\AppData\Local\1725e79a-1867-4dec-a471-3388488564e0\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • memory/324-7-0x0000000000000000-mapping.dmp

  • memory/544-4-0x0000000000AE0000-0x0000000000BFA000-memory.dmp

    Filesize

    1.1MB

  • memory/544-2-0x0000000000C80000-0x0000000000C91000-memory.dmp

    Filesize

    68KB

  • memory/544-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/544-3-0x0000000076881000-0x0000000076883000-memory.dmp

    Filesize

    8KB

  • memory/836-21-0x0000000000000000-mapping.dmp

  • memory/940-35-0x0000000000000000-mapping.dmp

  • memory/1084-10-0x0000000000B20000-0x0000000000B31000-memory.dmp

    Filesize

    68KB

  • memory/1084-9-0x0000000000000000-mapping.dmp

  • memory/1084-17-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1428-41-0x0000000000000000-mapping.dmp

  • memory/1608-43-0x0000000000000000-mapping.dmp

  • memory/1708-42-0x0000000000000000-mapping.dmp

  • memory/1744-30-0x0000000000000000-mapping.dmp

  • memory/1748-6-0x000007FEF66D0000-0x000007FEF694A000-memory.dmp

    Filesize

    2.5MB

  • memory/1888-33-0x0000000000000000-mapping.dmp