Analysis

  • max time kernel
    26s
  • max time network
    44s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    27-03-2021 19:56

General

  • Target

    c42634f75c9b327a17684b55e162ec9a.exe

  • Size

    713KB

  • MD5

    c42634f75c9b327a17684b55e162ec9a

  • SHA1

    c21f18b46532fa32d45b671b7e804404cff23976

  • SHA256

    2ae59af40109d186eb8999211e8ad933d2fffec609a2bdbd87a8aa4e9654a111

  • SHA512

    7590c1a35add4ad87b3e73a2140efecdbf405c6fb0888d23b9e5288786c037dc458ac53c1ce9b91146807393ea64c2084d56b38e797c9b19fd63b772f45d4f08

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 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\c42634f75c9b327a17684b55e162ec9a.exe
    "C:\Users\Admin\AppData\Local\Temp\c42634f75c9b327a17684b55e162ec9a.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1932
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\4f6f4b62-c91b-40d2-ae24-2b463f97bc00" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:576
    • C:\Users\Admin\AppData\Local\Temp\c42634f75c9b327a17684b55e162ec9a.exe
      "C:\Users\Admin\AppData\Local\Temp\c42634f75c9b327a17684b55e162ec9a.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Loads dropped DLL
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:924
      • C:\Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\updatewin.exe
        "C:\Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\updatewin.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:872
        • C:\Windows\SysWOW64\cmd.exe
          /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\updatewin.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:776
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 3
            5⤵
            • Delays execution with timeout.exe
            PID:1692
      • C:\Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\5.exe
        "C:\Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\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:572
        • 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\55356e90-8624-493a-b5e2-a814a4db25d3\5.exe" & del C:\ProgramData\*.dll & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:652
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im 5.exe /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1752
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 6
            5⤵
            • Delays execution with timeout.exe
            PID:1496

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

    f73d46ba9c9045633cac5ebf1442b931

    SHA1

    f1e81e9eaf322ffb8a25fc428231e486fa1028fe

    SHA256

    baddcff6da313cce5bd9590c7de0ef99f69e7d64840e2af33353b866d772bc91

    SHA512

    ed3bf10ecde1162ccce8f243c65f24b621184ef52efd6288a95fd9ff889c0d2407af127305f3f1c12d6bd591966f811cbee32bc2e3fe7d9e607e81dd987e6462

  • 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

    7d98a1a29082095fcf0be14aded739bf

    SHA1

    d2ef5678db6ab6573ec7275aae4af9ab3d8ddd3c

    SHA256

    2f6cb738db05f4049507fcf434120dfcbb9d84cdd0494ff9008941977659b100

    SHA512

    d2da9c1531595074825665d74acd90f04a3b0cc69827ad988408490beb739588a2b92a0926a4fcd975c8787406153b89444d54fc13f354040867804aeb454a1f

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

    MD5

    ede834c5005585d75dcba3352e9151ce

    SHA1

    969238eec39013c0f574a7b1daaa005065c63545

    SHA256

    832834e82fab3fcdb8f7d5732e7430997eee3a3f04a6881e36c06033fe1f6668

    SHA512

    3cd6e2c1afb0058e484605cd0d35c3a6376454ca87ef05da290323882dd394841e56dbe542722d6c8e8bc57df97838c2a60ea7613599b4bf9588429e60549a25

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

    MD5

    e55942a9145c80a9ec2c0f75ca420149

    SHA1

    2a192acaf0b7a2a48f035867ea7cffbf58f96a54

    SHA256

    0f040af77e6b340292544247c767df1b28fd012407b7b7c077412e7ef4e23b8b

    SHA512

    790a92bc8e59cfb3180ec322fe7ba1673878dbba4fc4a8caf59235f406839fb391cd7f31168ff5b6e1d2ff667990064550ef06af58d13654b472737c88e68ac7

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

    MD5

    73da13788b99b547429931b0264aa399

    SHA1

    1e29c5fd8e31bd6d962b0772d39f75af21dab0af

    SHA256

    799419d7e96cfe4f6e88ea4169383a0f2930d189497f8630dd1c9a41e1c0e65e

    SHA512

    869a9d9b1c827b55c156f4dadfefed33d02c656b67d5ec52a6bfb4f84731197d4814ea7379539b22a53ee5e708dac4d5fca43261aca978e1cc70d2a792aab471

  • C:\Users\Admin\AppData\Local\4f6f4b62-c91b-40d2-ae24-2b463f97bc00\c42634f75c9b327a17684b55e162ec9a.exe

    MD5

    c42634f75c9b327a17684b55e162ec9a

    SHA1

    c21f18b46532fa32d45b671b7e804404cff23976

    SHA256

    2ae59af40109d186eb8999211e8ad933d2fffec609a2bdbd87a8aa4e9654a111

    SHA512

    7590c1a35add4ad87b3e73a2140efecdbf405c6fb0888d23b9e5288786c037dc458ac53c1ce9b91146807393ea64c2084d56b38e797c9b19fd63b772f45d4f08

  • C:\Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\5.exe

    MD5

    212b12e2686111514455c97b689c8457

    SHA1

    2c39181e491ccea8f3eb1020b698bfaf57b31c15

    SHA256

    a8fe17654d8f2a952fee93bd6e78864ee4a2e766c92e6ba7dda2b0117e1ef97a

    SHA512

    cec5e902dce2dd4d70eef4ca835efa2704e49c434dd81e2b99100df76b1b095110e11b54ad5d2036d60f5378bf5fd637c5e0d36b7fcd3c0cd9cd77bc34c95346

  • C:\Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\5.exe

    MD5

    212b12e2686111514455c97b689c8457

    SHA1

    2c39181e491ccea8f3eb1020b698bfaf57b31c15

    SHA256

    a8fe17654d8f2a952fee93bd6e78864ee4a2e766c92e6ba7dda2b0117e1ef97a

    SHA512

    cec5e902dce2dd4d70eef4ca835efa2704e49c434dd81e2b99100df76b1b095110e11b54ad5d2036d60f5378bf5fd637c5e0d36b7fcd3c0cd9cd77bc34c95346

  • C:\Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • C:\Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • \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\55356e90-8624-493a-b5e2-a814a4db25d3\5.exe

    MD5

    212b12e2686111514455c97b689c8457

    SHA1

    2c39181e491ccea8f3eb1020b698bfaf57b31c15

    SHA256

    a8fe17654d8f2a952fee93bd6e78864ee4a2e766c92e6ba7dda2b0117e1ef97a

    SHA512

    cec5e902dce2dd4d70eef4ca835efa2704e49c434dd81e2b99100df76b1b095110e11b54ad5d2036d60f5378bf5fd637c5e0d36b7fcd3c0cd9cd77bc34c95346

  • \Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\5.exe

    MD5

    212b12e2686111514455c97b689c8457

    SHA1

    2c39181e491ccea8f3eb1020b698bfaf57b31c15

    SHA256

    a8fe17654d8f2a952fee93bd6e78864ee4a2e766c92e6ba7dda2b0117e1ef97a

    SHA512

    cec5e902dce2dd4d70eef4ca835efa2704e49c434dd81e2b99100df76b1b095110e11b54ad5d2036d60f5378bf5fd637c5e0d36b7fcd3c0cd9cd77bc34c95346

  • \Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • \Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • \Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • \Users\Admin\AppData\Local\55356e90-8624-493a-b5e2-a814a4db25d3\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • memory/572-40-0x0000000000400000-0x0000000000499000-memory.dmp

    Filesize

    612KB

  • memory/572-31-0x0000000000000000-mapping.dmp

  • memory/572-37-0x0000000002F70000-0x0000000002F81000-memory.dmp

    Filesize

    68KB

  • memory/572-39-0x0000000002C60000-0x0000000002CF6000-memory.dmp

    Filesize

    600KB

  • memory/576-7-0x0000000000000000-mapping.dmp

  • memory/652-45-0x0000000000000000-mapping.dmp

  • memory/776-33-0x0000000000000000-mapping.dmp

  • memory/800-6-0x000007FEF5BC0000-0x000007FEF5E3A000-memory.dmp

    Filesize

    2.5MB

  • memory/872-22-0x0000000000000000-mapping.dmp

  • memory/924-9-0x0000000000000000-mapping.dmp

  • memory/924-11-0x0000000002170000-0x0000000002181000-memory.dmp

    Filesize

    68KB

  • memory/924-20-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1496-47-0x0000000000000000-mapping.dmp

  • memory/1692-35-0x0000000000000000-mapping.dmp

  • memory/1752-46-0x0000000000000000-mapping.dmp

  • memory/1932-2-0x0000000002250000-0x0000000002261000-memory.dmp

    Filesize

    68KB

  • memory/1932-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1932-4-0x00000000008B0000-0x00000000009CA000-memory.dmp

    Filesize

    1.1MB

  • memory/1932-3-0x00000000750C1000-0x00000000750C3000-memory.dmp

    Filesize

    8KB