Analysis

  • max time kernel
    149s
  • max time network
    127s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    28-01-2023 13:57

General

  • Target

    tmp.exe

  • Size

    4.1MB

  • MD5

    e1668320cc4cade25d81b798190725c1

  • SHA1

    2e260a1b3f1bcd26f00d8d6e850812c740b11d3b

  • SHA256

    0ef43bfbcf7566727359acd6ab88590c1cbcdd25c913e2ea8c111118493f8e7c

  • SHA512

    18060d1e3be8b139863e46b3e77dc5d7e8b7629f0768fbaa1e4090acef065d04f6108036369b7c4b8fff7d1fcd7b74093f787c5d05f15bab38e5a1c4ea7f2242

  • SSDEEP

    98304:yAgqXSO7ZI0UxEcxtGya6JfjUV+2E3Szfj4bCBj4:yVqXTWxV7Jf6DbzrpB

Malware Config

Signatures

  • Detect PureCrypter injector 1 IoCs
  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Looks up geolocation information via web service

    Uses a legitimate geolocation service to find the infected system's geolocation info.

  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
    1⤵
    • Accesses Microsoft Outlook profiles
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    • outlook_office_path
    • outlook_win_path
    PID:1096
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1108
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1796
    • C:\Windows\system32\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1160
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:1072
        • C:\Windows\system32\netsh.exe
          netsh wlan show profile
          3⤵
            PID:1464
          • C:\Windows\system32\findstr.exe
            findstr All
            3⤵
              PID:1224
          • C:\Windows\system32\cmd.exe
            "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:624
            • C:\Windows\system32\chcp.com
              chcp 65001
              3⤵
                PID:800
              • C:\Windows\system32\netsh.exe
                netsh wlan show networks mode=bssid
                3⤵
                  PID:956
            • C:\Windows\system32\msiexec.exe
              C:\Windows\system32\msiexec.exe /V
              1⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:1540

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • memory/624-75-0x0000000000000000-mapping.dmp

            • memory/800-76-0x0000000000000000-mapping.dmp

            • memory/956-77-0x0000000000000000-mapping.dmp

            • memory/1072-71-0x0000000000000000-mapping.dmp

            • memory/1096-59-0x000000001CC70000-0x000000001CE6C000-memory.dmp

              Filesize

              2.0MB

            • memory/1096-66-0x000000001E5A0000-0x000000001E75C000-memory.dmp

              Filesize

              1.7MB

            • memory/1096-54-0x0000000001140000-0x0000000001558000-memory.dmp

              Filesize

              4.1MB

            • memory/1096-80-0x000000001D730000-0x000000001D7AA000-memory.dmp

              Filesize

              488KB

            • memory/1096-62-0x0000000002A77000-0x0000000002A96000-memory.dmp

              Filesize

              124KB

            • memory/1096-55-0x000000001C280000-0x000000001C69A000-memory.dmp

              Filesize

              4.1MB

            • memory/1096-63-0x000000001CE70000-0x000000001D030000-memory.dmp

              Filesize

              1.8MB

            • memory/1096-81-0x0000000020770000-0x0000000020820000-memory.dmp

              Filesize

              704KB

            • memory/1096-82-0x000000001EF40000-0x000000001EFC2000-memory.dmp

              Filesize

              520KB

            • memory/1096-69-0x0000000002A77000-0x0000000002A96000-memory.dmp

              Filesize

              124KB

            • memory/1108-56-0x0000000000000000-mapping.dmp

            • memory/1160-70-0x0000000000000000-mapping.dmp

            • memory/1224-73-0x0000000000000000-mapping.dmp

            • memory/1464-72-0x0000000000000000-mapping.dmp

            • memory/1796-60-0x000007FEEB640000-0x000007FEEC063000-memory.dmp

              Filesize

              10.1MB

            • memory/1796-67-0x0000000002494000-0x0000000002497000-memory.dmp

              Filesize

              12KB

            • memory/1796-68-0x000000000249B000-0x00000000024BA000-memory.dmp

              Filesize

              124KB

            • memory/1796-65-0x000000001B6F0000-0x000000001B9EF000-memory.dmp

              Filesize

              3.0MB

            • memory/1796-64-0x0000000002494000-0x0000000002497000-memory.dmp

              Filesize

              12KB

            • memory/1796-61-0x000007FEEAAE0000-0x000007FEEB63D000-memory.dmp

              Filesize

              11.4MB

            • memory/1796-58-0x000007FEFC141000-0x000007FEFC143000-memory.dmp

              Filesize

              8KB

            • memory/1796-57-0x0000000000000000-mapping.dmp