Analysis

  • max time kernel
    67s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    09-03-2021 12:58

General

  • Target

    dubi.exe

  • Size

    698KB

  • MD5

    839609b011f03a293a0573ea5fb1277e

  • SHA1

    fe48ac0a84e79bc2dd0024e55a62e86b077f8c12

  • SHA256

    d466ef9698569363af4f08b64235817c7838c726c1faee300582aab3d90f5683

  • SHA512

    526f6345e367950bc775213663fd68bd7bae2b82c71df70e8589dccc173da66af0171183c4abc4a102e45e151453ff8a8d67c2e4c8fcf72c54d85def22d37ac4

Malware Config

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • 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 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 27 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:728
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\556e4a1b-f0ae-42e9-bae4-cb4ebcfa510d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:2568
    • C:\Users\Admin\AppData\Local\Temp\dubi.exe
      "C:\Users\Admin\AppData\Local\Temp\dubi.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:576
      • C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\updatewin.exe
        "C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\updatewin.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:1904
        • C:\Windows\SysWOW64\cmd.exe
          /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\updatewin.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2900
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 3
            5⤵
            • Delays execution with timeout.exe
            PID:2976
      • C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\5.exe
        "C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\5.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1504
        • 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\34290c94-8201-4e5a-8cc2-25c5d973227a\5.exe" & del C:\ProgramData\*.dll & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1840
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im 5.exe /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:3604
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 6
            5⤵
            • Delays execution with timeout.exe
            PID:1508

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

    4c9af35a7edd6351ed1b0369aa5fdaad

    SHA1

    a31deacfdba98949799105169f460234a356d1b6

    SHA256

    272b1eae7ab0152427b63c9f44b954394ce8e69b39e60f4d768b00b1d6365d6c

    SHA512

    928cc4be39b1dca84af72b09067b1553ce04cac8020aba3e2f37023fb396a792ddacde4d68121d4736311aa8dd761fcc161f52224d243ae68cd6d5f6fe8a038d

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

    MD5

    a4f1a3227ff7283cc8dd2f9e68025e12

    SHA1

    67c2de733b15f65c5157a6d495534ebdd00311c2

    SHA256

    f0e3107fe54fa10875ee7b53675713b6835c31e21d4f2c6c00880fa1b7166982

    SHA512

    3d66e1cc35685bb0ceac80e368b0743582046f3d3a6566486aeb4f956473f17dde1ef1dbd6a584ef2492e6bf0555068e0d672fa34194a6b9f37a19134670f10e

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

    MD5

    f1405cbe9a463ec9abba40056ae1249e

    SHA1

    102894b2526d4f37487ad7e4618aa9e161ca7fe7

    SHA256

    eee9c0fcd367afda06280332d384d8505eac33f5ff4e623bb3b615b2e2814492

    SHA512

    b445068a2fed11b614919719b21037d5155ef22e732b58b280347f69ee0302645200522619a50d8e0c4312c93ee7aec76efa638aad2d24d2c2bd6ccc5f6166cd

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

    MD5

    83a69b7893e6f24064bc929a34107faf

    SHA1

    5824f62d9e070e5596de7cb060a27cac25faf584

    SHA256

    cf24bbe8853cbbf66fdbf1bdd9a5521313d32f6f1529af99f92c2f9e5de5608e

    SHA512

    93bedabf32405768f6035c11e98a0bac6d2c65736b52c170a2bfc648f417257b04e4778490e7056f8b7af2c50d67e8c07d4c21063ae67c521498bd63fe657041

  • C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\5.exe

    MD5

    6a50d5e91b193be284aa02106ee35e97

    SHA1

    097137cb64eb18ce55c13f1e841d5312d07fbbf4

    SHA256

    82c1ccbd7db7615a982f7b8072784575972aff3f0ab4597efda9d2e7ca17b961

    SHA512

    7f79ef4c3b2cd32e6e1fe6c64d1a693115789665f705144cb912500f25f669f28ac61f709d29057b66bf2a6c1f8376b3a8ef7ccb95668cabf2d15455745f1f03

  • C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\5.exe

    MD5

    6a50d5e91b193be284aa02106ee35e97

    SHA1

    097137cb64eb18ce55c13f1e841d5312d07fbbf4

    SHA256

    82c1ccbd7db7615a982f7b8072784575972aff3f0ab4597efda9d2e7ca17b961

    SHA512

    7f79ef4c3b2cd32e6e1fe6c64d1a693115789665f705144cb912500f25f669f28ac61f709d29057b66bf2a6c1f8376b3a8ef7ccb95668cabf2d15455745f1f03

  • C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\updatewin.exe

    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • C:\Users\Admin\AppData\Local\556e4a1b-f0ae-42e9-bae4-cb4ebcfa510d\dubi.exe

    MD5

    839609b011f03a293a0573ea5fb1277e

    SHA1

    fe48ac0a84e79bc2dd0024e55a62e86b077f8c12

    SHA256

    d466ef9698569363af4f08b64235817c7838c726c1faee300582aab3d90f5683

    SHA512

    526f6345e367950bc775213663fd68bd7bae2b82c71df70e8589dccc173da66af0171183c4abc4a102e45e151453ff8a8d67c2e4c8fcf72c54d85def22d37ac4

  • \ProgramData\mozglue.dll

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/576-10-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

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

  • memory/576-8-0x0000000003210000-0x0000000003211000-memory.dmp

    Filesize

    4KB

  • memory/728-3-0x00000000031A0000-0x00000000032BA000-memory.dmp

    Filesize

    1.1MB

  • memory/728-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/728-2-0x00000000031A0000-0x00000000031A1000-memory.dmp

    Filesize

    4KB

  • memory/1504-18-0x0000000000000000-mapping.dmp

  • memory/1508-27-0x0000000000000000-mapping.dmp

  • memory/1840-25-0x0000000000000000-mapping.dmp

  • memory/1904-15-0x0000000000000000-mapping.dmp

  • memory/2568-5-0x0000000000000000-mapping.dmp

  • memory/2900-21-0x0000000000000000-mapping.dmp

  • memory/2976-22-0x0000000000000000-mapping.dmp

  • memory/3604-26-0x0000000000000000-mapping.dmp