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Analysis

  • max time kernel
    160s
  • max time network
    201s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/12/2022, 07:41

General

  • Target

    7b083e02dacacc8c7e04a9cf71c96ede50190d031e6fd9c5c21db08e80efb474.exe

  • Size

    7.4MB

  • MD5

    042d8f91b6cf63017646706b74561b27

  • SHA1

    4bfe69b43b1bfe28702a7ef44cc68127b0b5ae05

  • SHA256

    7b083e02dacacc8c7e04a9cf71c96ede50190d031e6fd9c5c21db08e80efb474

  • SHA512

    73f68f192ec224a138da103eabb0c885b3a07bfb0bd4f5f5774d1294d614535ffefa58d404c1e9b1e0e9268456a198b81b79008b5dcefdfcd12c1c228e186b92

  • SSDEEP

    196608:pAnqVdHABvooPl0+cTY3tZLJejmOAWx1AtdmCimv/SHqUUHv/Swv/SW45qUUpcQE:+wQ5N0+mYZ1itLAdWm8q/Hz5aq/RC7p

Malware Config

Signatures

  • ISR Stealer

    ISR Stealer is a modified version of Hackhound Stealer written in visual basic.

  • ISR Stealer payload 3 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 7 IoCs
  • Executes dropped EXE 5 IoCs
  • UPX packed file 8 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7b083e02dacacc8c7e04a9cf71c96ede50190d031e6fd9c5c21db08e80efb474.exe
    "C:\Users\Admin\AppData\Local\Temp\7b083e02dacacc8c7e04a9cf71c96ede50190d031e6fd9c5c21db08e80efb474.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3060
    • C:\Users\Admin\AppData\Local\Temp\cvtres.exe
      C:\Users\Admin\AppData\Local\Temp\\cvtres.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:444
      • C:\Users\Admin\AppData\Local\Temp\cvtres.exe
        "C:\Users\Admin\AppData\Local\Temp\cvtres.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:5116
        • C:\Users\Admin\AppData\Local\Temp\cvtres.exe
          "C:\Users\Admin\AppData\Local\Temp\cvtres.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
          4⤵
          • Executes dropped EXE
          PID:3996
        • C:\Users\Admin\AppData\Local\Temp\cvtres.exe
          "C:\Users\Admin\AppData\Local\Temp\cvtres.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3960
        • C:\Users\Admin\AppData\Local\Temp\cvtres.exe
          "C:\Users\Admin\AppData\Local\Temp\cvtres.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
          4⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook accounts
          PID:372

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\cvtres.exe

    Filesize

    34KB

    MD5

    e118330b4629b12368d91b9df6488be0

    SHA1

    ce90218c7e3b90df2a3409ec253048bb6472c2fd

    SHA256

    3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

    SHA512

    ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

  • C:\Users\Admin\AppData\Local\Temp\cvtres.exe

    Filesize

    34KB

    MD5

    e118330b4629b12368d91b9df6488be0

    SHA1

    ce90218c7e3b90df2a3409ec253048bb6472c2fd

    SHA256

    3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

    SHA512

    ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

  • C:\Users\Admin\AppData\Local\Temp\cvtres.exe

    Filesize

    34KB

    MD5

    e118330b4629b12368d91b9df6488be0

    SHA1

    ce90218c7e3b90df2a3409ec253048bb6472c2fd

    SHA256

    3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

    SHA512

    ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

  • C:\Users\Admin\AppData\Local\Temp\cvtres.exe

    Filesize

    34KB

    MD5

    e118330b4629b12368d91b9df6488be0

    SHA1

    ce90218c7e3b90df2a3409ec253048bb6472c2fd

    SHA256

    3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

    SHA512

    ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

  • C:\Users\Admin\AppData\Local\Temp\cvtres.exe

    Filesize

    34KB

    MD5

    e118330b4629b12368d91b9df6488be0

    SHA1

    ce90218c7e3b90df2a3409ec253048bb6472c2fd

    SHA256

    3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

    SHA512

    ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

  • C:\Users\Admin\AppData\Local\Temp\cvtres.exe

    Filesize

    34KB

    MD5

    e118330b4629b12368d91b9df6488be0

    SHA1

    ce90218c7e3b90df2a3409ec253048bb6472c2fd

    SHA256

    3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

    SHA512

    ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

  • memory/372-166-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/372-164-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/372-162-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/372-154-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/444-155-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/444-168-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/444-134-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/3060-169-0x0000000074C60000-0x0000000075211000-memory.dmp

    Filesize

    5.7MB

  • memory/3060-132-0x0000000074C60000-0x0000000075211000-memory.dmp

    Filesize

    5.7MB

  • memory/3960-163-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/3960-165-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/3960-161-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/3960-150-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/3996-159-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/3996-167-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/3996-146-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/5116-144-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/5116-141-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/5116-158-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/5116-143-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB