Analysis

  • max time kernel
    4294183s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20220310-en
  • submitted
    13-03-2022 09:33

General

  • Target

    f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe

  • Size

    549KB

  • MD5

    376fe5034ac55ecf08bbd54b14e3458a

  • SHA1

    09b537109862bfaff6f9df62ad09b8f395cd866d

  • SHA256

    f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df

  • SHA512

    a3bb779d41db84d0e45c4da1d6483beb0b12af85546bbdeb5734dcfde55311ab117eecf78276b35b4000171189e1eeb299180b6a4068016b75ea8c554b45b13f

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 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 4 IoCs
  • Executes dropped EXE 5 IoCs
  • UPX packed file 6 IoCs

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

  • Loads dropped DLL 5 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.

  • Suspicious behavior: EnumeratesProcesses 6 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\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe
    "C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:536
    • C:\Users\Admin\AppData\Local\Temp\cvtres.exe
      C:\Users\Admin\AppData\Local\Temp\\cvtres.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1660
      • 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
        • Suspicious use of WriteProcessMemory
        PID:1904
        • 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:1896
        • 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 use of AdjustPrivilegeToken
          PID:1712
        • 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:1576

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/536-56-0x0000000000500000-0x0000000000501000-memory.dmp

    Filesize

    4KB

  • memory/536-55-0x0000000074B90000-0x000000007513B000-memory.dmp

    Filesize

    5.7MB

  • memory/536-54-0x0000000076141000-0x0000000076143000-memory.dmp

    Filesize

    8KB

  • memory/536-57-0x0000000074B90000-0x000000007513B000-memory.dmp

    Filesize

    5.7MB

  • memory/1576-106-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1576-104-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1576-114-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1576-115-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1660-63-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/1660-59-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/1660-65-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/1660-61-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/1712-97-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1712-116-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1712-113-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1712-100-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1896-93-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/1896-91-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/1896-112-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/1904-82-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/1904-80-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/1904-78-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/1904-84-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/1904-76-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/1904-74-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/1904-72-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/1904-86-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/1904-89-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/1904-88-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB