Analysis

  • max time kernel
    61s
  • max time network
    70s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    02-12-2022 17:36

General

  • Target

    a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe

  • Size

    910KB

  • MD5

    db811c57db214dad46532e0635cd6dda

  • SHA1

    fa5079599bdef98564161451ad971a532c20d15b

  • SHA256

    a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2

  • SHA512

    e753d056c25005dd2bc20a977240a7479b667000ab452b628e92ba6b6315f929d0183fa6170f8400d133388d14ca12d3e74fbfadbdf2fef343dfb1e622f37702

  • SSDEEP

    24576:yppWKKEKzqntnhEMGgVz0MlYBHu6nSCdrvk:41KEKYtnhTpIu6p

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 5 IoCs
  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 5 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 10 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
    "C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1160
    • C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
      C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1716
      • C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
        "C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe"
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:816
        • C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
          "C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
          4⤵
            PID:2016
          • C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
            "C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1800
          • C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe
            "C:\Users\Admin\AppData\Local\Temp\a3c001d96a6423bd7665c2b287d0320c8bea56f351a51a7eed24353a2028b0c2.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
            4⤵
            • Accesses Microsoft Outlook accounts
            PID:1840

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/816-73-0x0000000000400000-0x000000000045F000-memory.dmp

      Filesize

      380KB

    • memory/816-77-0x0000000000400000-0x000000000045F000-memory.dmp

      Filesize

      380KB

    • memory/816-75-0x0000000000400000-0x000000000045F000-memory.dmp

      Filesize

      380KB

    • memory/816-104-0x0000000000400000-0x000000000045F000-memory.dmp

      Filesize

      380KB

    • memory/816-80-0x0000000000408E48-mapping.dmp

    • memory/816-81-0x0000000000400000-0x000000000045F000-memory.dmp

      Filesize

      380KB

    • memory/816-74-0x0000000000400000-0x000000000045F000-memory.dmp

      Filesize

      380KB

    • memory/816-79-0x0000000000400000-0x000000000045F000-memory.dmp

      Filesize

      380KB

    • memory/816-82-0x0000000000400000-0x000000000045F000-memory.dmp

      Filesize

      380KB

    • memory/816-76-0x0000000000400000-0x000000000045F000-memory.dmp

      Filesize

      380KB

    • memory/816-71-0x0000000000400000-0x000000000045F000-memory.dmp

      Filesize

      380KB

    • memory/816-70-0x0000000000400000-0x000000000045F000-memory.dmp

      Filesize

      380KB

    • memory/1160-66-0x00000000744E0000-0x0000000074A8B000-memory.dmp

      Filesize

      5.7MB

    • memory/1160-54-0x0000000075A91000-0x0000000075A93000-memory.dmp

      Filesize

      8KB

    • memory/1160-55-0x00000000744E0000-0x0000000074A8B000-memory.dmp

      Filesize

      5.7MB

    • memory/1160-56-0x00000000744E0000-0x0000000074A8B000-memory.dmp

      Filesize

      5.7MB

    • memory/1716-68-0x0000000000401000-0x0000000000414000-memory.dmp

      Filesize

      76KB

    • memory/1716-62-0x0000000000400000-0x0000000000470000-memory.dmp

      Filesize

      448KB

    • memory/1716-63-0x00000000004011F8-mapping.dmp

    • memory/1716-60-0x0000000000400000-0x0000000000470000-memory.dmp

      Filesize

      448KB

    • memory/1716-58-0x0000000000400000-0x0000000000470000-memory.dmp

      Filesize

      448KB

    • memory/1716-65-0x0000000000400000-0x0000000000470000-memory.dmp

      Filesize

      448KB

    • memory/1716-57-0x0000000000400000-0x0000000000470000-memory.dmp

      Filesize

      448KB

    • memory/1800-91-0x0000000000400000-0x0000000000426000-memory.dmp

      Filesize

      152KB

    • memory/1800-88-0x0000000000400000-0x0000000000426000-memory.dmp

      Filesize

      152KB

    • memory/1800-108-0x0000000000400000-0x0000000000426000-memory.dmp

      Filesize

      152KB

    • memory/1800-93-0x0000000000423BC0-mapping.dmp

    • memory/1800-98-0x0000000000400000-0x0000000000426000-memory.dmp

      Filesize

      152KB

    • memory/1800-101-0x0000000000400000-0x0000000000426000-memory.dmp

      Filesize

      152KB

    • memory/1840-106-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1840-100-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1840-102-0x000000000041C3A0-mapping.dmp

    • memory/1840-95-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1840-107-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1840-109-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2016-92-0x0000000000400000-0x0000000000454000-memory.dmp

      Filesize

      336KB

    • memory/2016-85-0x0000000000400000-0x0000000000454000-memory.dmp

      Filesize

      336KB

    • memory/2016-83-0x0000000000400000-0x0000000000454000-memory.dmp

      Filesize

      336KB

    • memory/2016-86-0x000000000043F420-mapping.dmp

    • memory/2016-110-0x0000000000400000-0x0000000000454000-memory.dmp

      Filesize

      336KB

    • memory/2016-111-0x0000000000400000-0x0000000000454000-memory.dmp

      Filesize

      336KB