Analysis

  • max time kernel
    4294182s
  • max time network
    162s
  • platform
    windows7_x64
  • resource
    win7-20220310-en
  • submitted
    15-03-2022 13:58

General

  • Target

    fb0de34718e9a60aba9c45ef7a3f2c1afb44b7b9568d8ef4c7c76f51904e5f5c.exe

  • Size

    1.0MB

  • MD5

    831764a8fcbdc755f5b41a091f485c26

  • SHA1

    be4eb6388f79d7f11bcbfe9209ef4390d6ef14c7

  • SHA256

    fb0de34718e9a60aba9c45ef7a3f2c1afb44b7b9568d8ef4c7c76f51904e5f5c

  • SHA512

    19b4cc5454eda7089903b5276038efcf56ee1cb215dec06262329c33c4b7ff71c0a02a7e2bad878854dd4b31ae4ea43c2e393608e231cfcb123681ff67d2ec18

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer Payload 2 IoCs
  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 5 IoCs
  • Executes dropped EXE 6 IoCs
  • UPX packed file 8 IoCs

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

  • Loads dropped DLL 19 IoCs
  • 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.

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 60 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fb0de34718e9a60aba9c45ef7a3f2c1afb44b7b9568d8ef4c7c76f51904e5f5c.exe
    "C:\Users\Admin\AppData\Local\Temp\fb0de34718e9a60aba9c45ef7a3f2c1afb44b7b9568d8ef4c7c76f51904e5f5c.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1660
    • C:\Users\Admin\AppData\Local\Temp\xDlKi.exe
      "C:\Users\Admin\AppData\Local\Temp\xDlKi.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2000
      • C:\Users\Admin\AppData\Local\Temp\cvtres.exe
        C:\Users\Admin\AppData\Local\Temp\\cvtres.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:784
        • C:\Users\Admin\AppData\Local\Temp\cvtres.exe
          "C:\Users\Admin\AppData\Local\Temp\cvtres.exe"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:988
          • 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
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            PID:1152
          • 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
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1080
          • 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
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Accesses Microsoft Outlook accounts
            PID:468

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/468-124-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/468-148-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/468-133-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/468-126-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/468-145-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/784-72-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/784-70-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/784-68-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/784-74-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/988-92-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/988-84-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/988-98-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/988-100-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/988-96-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/988-110-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/988-94-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/988-108-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/988-90-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/988-106-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/988-88-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/988-101-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/988-86-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/1080-118-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1080-131-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1080-120-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1080-146-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1080-137-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1152-114-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/1152-138-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/1152-147-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/1152-112-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/1660-54-0x0000000075421000-0x0000000075423000-memory.dmp

    Filesize

    8KB

  • memory/1660-57-0x0000000073CA0000-0x000000007424B000-memory.dmp

    Filesize

    5.7MB

  • memory/1660-56-0x0000000000BE0000-0x0000000000BE1000-memory.dmp

    Filesize

    4KB

  • memory/1660-55-0x0000000073CA0000-0x000000007424B000-memory.dmp

    Filesize

    5.7MB

  • memory/2000-66-0x0000000000520000-0x0000000000521000-memory.dmp

    Filesize

    4KB

  • memory/2000-65-0x0000000073CA0000-0x000000007424B000-memory.dmp

    Filesize

    5.7MB