Analysis

  • max time kernel
    110s
  • max time network
    113s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-01-2025 04:45

General

  • Target

    a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe

  • Size

    368KB

  • MD5

    2166580cdb35ef98a1683cb172717a16

  • SHA1

    2289422b25f1fc9d7bd7de41790928f698c33a4f

  • SHA256

    a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17

  • SHA512

    faff7258e3526dd490a0dc825d898fbe1839be2c1b690688b55d89b8e12ea6fb7026721924ba8471ba2c668452931f26d8f8be9189d521c647fc0e5cf7db4365

  • SSDEEP

    6144:bYXlu7PKTgM8jlcud0oTPP/eqTNYDWyys9YIusnowR/gVxoCiLXcisNC79FPQ2HF:2rTgM8j6QxNpyVY6/gV8Ft

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 4 IoCs
  • Isrstealer family
  • Detected Nirsoft tools 7 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft WebBrowserPassView 7 IoCs

    Password recovery tool for various web browsers

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 2 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 9 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 3 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 8 IoCs
  • UPX packed file 5 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 12 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
    "C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1396
    • C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
      "C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3164
      • C:\Users\Admin\AppData\Local\Temp\CVGCW.exe
        "C:\Users\Admin\AppData\Local\Temp\CVGCW.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3560
        • C:\Users\Admin\AppData\Local\Temp\CVGCW.exe
          "C:\Users\Admin\AppData\Local\Temp\CVGCW.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:1544
          • C:\Users\Admin\AppData\Local\Temp\CVGCW.exe
            "C:\Users\Admin\AppData\Local\Temp\CVGCW.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            PID:4180
    • C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
      "C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4304
      • C:\Users\Admin\AppData\Roaming\Host.exe
        "C:\Users\Admin\AppData\Roaming\Host.exe" C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:908
        • C:\Users\Admin\AppData\Roaming\Host.exe
          "C:\Users\Admin\AppData\Roaming\Host.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1660
          • C:\Users\Admin\AppData\Local\Temp\CVGBW.exe
            "C:\Users\Admin\AppData\Local\Temp\CVGBW.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:4376
            • C:\Users\Admin\AppData\Local\Temp\CVGBW.exe
              "C:\Users\Admin\AppData\Local\Temp\CVGBW.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • System Location Discovery: System Language Discovery
              PID:316
              • C:\Users\Admin\AppData\Local\Temp\CVGBW.exe
                "C:\Users\Admin\AppData\Local\Temp\CVGBW.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
                7⤵
                • Executes dropped EXE
                • System Location Discovery: System Language Discovery
                PID:4072
        • C:\Users\Admin\AppData\Roaming\Host.exe
          "C:\Users\Admin\AppData\Roaming\Host.exe"
          4⤵
          • Boot or Logon Autostart Execution: Active Setup
          • Executes dropped EXE
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          PID:4972

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    320KB

    MD5

    ccc2260269cb43ddadda9444e3d112f7

    SHA1

    ddab46acc12d7c60a15fa363f88030f1dd539fcb

    SHA256

    8ca1bd039407381c33fb7ab570b6e95b0ce64b0d5ef64a1968f9b55647cc1911

    SHA512

    787d0b4f5d89b840a4917c78e46f963c8c96a96ec005b45d085222ef307c2a76f074c4a65ca033b038e1b7d1419c7cd3c5c5f3075c3ea24e546c68bdd7643fde

  • C:\Users\Admin\AppData\Local\Temp\data.dmp

    Filesize

    54B

    MD5

    c10dbeca73f8835240e08e4511284b83

    SHA1

    0032f8f941cc07768189ca6ba32b1beede6b6917

    SHA256

    0b6b62094048f0a069b4582f837afcb941db51340d0b16d578e8cbe8603a071e

    SHA512

    34f7ab8b4ab7b4996b82ffc49198103ef245ee7dd5ccfec793a9ee391b9e9bb30bd3916b4ebeaa9c66a4b5ca42f8572418f16dc83d41073bc94389c19916b967

  • C:\Users\Admin\AppData\Roaming\Host.exe

    Filesize

    368KB

    MD5

    2166580cdb35ef98a1683cb172717a16

    SHA1

    2289422b25f1fc9d7bd7de41790928f698c33a4f

    SHA256

    a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17

    SHA512

    faff7258e3526dd490a0dc825d898fbe1839be2c1b690688b55d89b8e12ea6fb7026721924ba8471ba2c668452931f26d8f8be9189d521c647fc0e5cf7db4365

  • memory/316-92-0x0000000000400000-0x0000000000441000-memory.dmp

    Filesize

    260KB

  • memory/316-90-0x0000000000400000-0x0000000000441000-memory.dmp

    Filesize

    260KB

  • memory/316-94-0x0000000000400000-0x0000000000441000-memory.dmp

    Filesize

    260KB

  • memory/1396-2-0x0000000002280000-0x0000000002281000-memory.dmp

    Filesize

    4KB

  • memory/1396-4-0x0000000002C60000-0x0000000002C61000-memory.dmp

    Filesize

    4KB

  • memory/1396-3-0x0000000002BD0000-0x0000000002BD1000-memory.dmp

    Filesize

    4KB

  • memory/1544-46-0x0000000000400000-0x0000000000441000-memory.dmp

    Filesize

    260KB

  • memory/1544-48-0x0000000000400000-0x0000000000441000-memory.dmp

    Filesize

    260KB

  • memory/1544-44-0x0000000000400000-0x0000000000441000-memory.dmp

    Filesize

    260KB

  • memory/1544-52-0x0000000000400000-0x0000000000441000-memory.dmp

    Filesize

    260KB

  • memory/1544-50-0x0000000000400000-0x0000000000441000-memory.dmp

    Filesize

    260KB

  • memory/1660-105-0x0000000000400000-0x0000000000459000-memory.dmp

    Filesize

    356KB

  • memory/3164-13-0x0000000000400000-0x0000000000459000-memory.dmp

    Filesize

    356KB

  • memory/3164-8-0x0000000000400000-0x0000000000459000-memory.dmp

    Filesize

    356KB

  • memory/3164-61-0x0000000000400000-0x0000000000459000-memory.dmp

    Filesize

    356KB

  • memory/3164-7-0x0000000000400000-0x0000000000459000-memory.dmp

    Filesize

    356KB

  • memory/4072-97-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/4072-101-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/4072-99-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/4180-57-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/4180-59-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/4180-55-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/4180-51-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/4304-35-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4304-9-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4304-11-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4972-106-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4972-108-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB