Analysis

  • max time kernel
    4294178s
  • max time network
    130s
  • platform
    windows7_x64
  • resource
    win7-20220310-en
  • submitted
    12-03-2022 07:59

General

  • Target

    91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f.exe

  • Size

    1.8MB

  • MD5

    6dde36c30de2cb0df6d3b71e330c09e8

  • SHA1

    ef8c7b872da4633c5cd2ead357b2e8279d182ff9

  • SHA256

    91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f

  • SHA512

    2cea75a5241077aaf1ba809f088a1520c4719e2986bfe5f7abef77b3265332c48690942535c46c78020a2174d72f78d2bec83bce1292491628da335047a16abb

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer Payload 1 IoCs
  • UPX packed file 5 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

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

  • Suspicious use of SetThreadContext 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f.exe
    "C:\Users\Admin\AppData\Local\Temp\91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1428
    • C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe
      "C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1808
      • C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe
        /scomma "C:\Users\Admin\AppData\Local\Temp\fwzjTKh8w9.ini"
        3⤵
          PID:1780
        • C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\jQCDLrIz9J.ini"
          3⤵
            PID:1100

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • memory/1428-54-0x0000000074DE1000-0x0000000074DE3000-memory.dmp

        Filesize

        8KB

      • memory/1428-56-0x0000000000830000-0x0000000000831000-memory.dmp

        Filesize

        4KB

      • memory/1428-55-0x00000000741D0000-0x000000007477B000-memory.dmp

        Filesize

        5.7MB

      • memory/1428-57-0x00000000741D0000-0x000000007477B000-memory.dmp

        Filesize

        5.7MB

      • memory/1780-64-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/1780-67-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/1780-69-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/1780-70-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/1780-71-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/1808-58-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB