Analysis

  • max time kernel
    65s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    02-02-2023 06:25

General

  • Target

    INV-0097H.exe

  • Size

    6KB

  • MD5

    4a63e62a75447c399f717fd40805ada8

  • SHA1

    72a8c04321d4547c02464151ff585e5989d04d13

  • SHA256

    f5ee72bc3ed7127fdea098689d11b7c18f9bb5debbab5e4f5b0293b8017692e0

  • SHA512

    28ac8303385ad8888afee696bea516a2bc88dac8a857f67ef6640d7ed0363b596d048f21973dc933e35b9167948ec515a92a68b27e0901cb90aaf1212caff78c

  • SSDEEP

    96:zHdkMfcSBSGjmHCJoFAD4PF9MxM/bRrkQIOLFnU:zH9lkCql99MxMDRAwu

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.aewwholesale.com
  • Port:
    2525
  • Username:
    dukas@aewwholesale.com
  • Password:
    clgn6qPzaP

Signatures

  • Detect PureCrypter injector 1 IoCs
  • PureCrypter

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

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 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 local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • 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 6 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 3 IoCs

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

  • Suspicious use of SetThreadContext 1 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 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: SetClipboardViewer 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\INV-0097H.exe
    "C:\Users\Admin\AppData\Local\Temp\INV-0097H.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1128
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1228
    • C:\Users\Admin\AppData\Local\Temp\INV-0097H.exe
      C:\Users\Admin\AppData\Local\Temp\INV-0097H.exe
      2⤵
        PID:1684
      • C:\Users\Admin\AppData\Local\Temp\INV-0097H.exe
        C:\Users\Admin\AppData\Local\Temp\INV-0097H.exe
        2⤵
        • Loads dropped DLL
        • Accesses Microsoft Outlook profiles
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1492
        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\systemUpdate.exe
          "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\systemUpdate.exe"
          3⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Adds Run key to start application
          • Modifies system certificate store
          • Suspicious behavior: SetClipboardViewer
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • outlook_office_path
          • outlook_win_path
          PID:1948

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    2
    T1112

    Install Root Certificate

    1
    T1130

    Credential Access

    Credentials in Files

    3
    T1081

    Discovery

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    3
    T1005

    Email Collection

    1
    T1114

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\systemUpdate.exe
      Filesize

      168KB

      MD5

      e227008928b6ea25583ff1cbfc5b3e45

      SHA1

      d84ea8820ed5d6bbbe4404e46df4f66ac458e56f

      SHA256

      a9745e367e2c1fcd95322751ebc34fc89c8e3494e17c9ef1d9ce686b2dc3b68f

      SHA512

      cd49f586c6ae5e6d9135a5f434e72ed49c27660343befe93449d0c536520e47effaa17a7e249959f722369973eaad5ee5f7e8479ba10eb7e9de203f8982d9ad0

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\systemUpdate.exe
      Filesize

      168KB

      MD5

      e227008928b6ea25583ff1cbfc5b3e45

      SHA1

      d84ea8820ed5d6bbbe4404e46df4f66ac458e56f

      SHA256

      a9745e367e2c1fcd95322751ebc34fc89c8e3494e17c9ef1d9ce686b2dc3b68f

      SHA512

      cd49f586c6ae5e6d9135a5f434e72ed49c27660343befe93449d0c536520e47effaa17a7e249959f722369973eaad5ee5f7e8479ba10eb7e9de203f8982d9ad0

    • \Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\systemUpdate.exe
      Filesize

      168KB

      MD5

      e227008928b6ea25583ff1cbfc5b3e45

      SHA1

      d84ea8820ed5d6bbbe4404e46df4f66ac458e56f

      SHA256

      a9745e367e2c1fcd95322751ebc34fc89c8e3494e17c9ef1d9ce686b2dc3b68f

      SHA512

      cd49f586c6ae5e6d9135a5f434e72ed49c27660343befe93449d0c536520e47effaa17a7e249959f722369973eaad5ee5f7e8479ba10eb7e9de203f8982d9ad0

    • memory/1128-55-0x0000000076961000-0x0000000076963000-memory.dmp
      Filesize

      8KB

    • memory/1128-56-0x0000000006270000-0x0000000006504000-memory.dmp
      Filesize

      2.6MB

    • memory/1128-62-0x0000000004EE0000-0x0000000004F4E000-memory.dmp
      Filesize

      440KB

    • memory/1128-54-0x0000000001380000-0x0000000001388000-memory.dmp
      Filesize

      32KB

    • memory/1228-57-0x0000000000000000-mapping.dmp
    • memory/1228-59-0x000000006FB00000-0x00000000700AB000-memory.dmp
      Filesize

      5.7MB

    • memory/1228-60-0x000000006FB00000-0x00000000700AB000-memory.dmp
      Filesize

      5.7MB

    • memory/1228-61-0x000000006FB00000-0x00000000700AB000-memory.dmp
      Filesize

      5.7MB

    • memory/1492-67-0x0000000000400000-0x0000000000468000-memory.dmp
      Filesize

      416KB

    • memory/1492-69-0x0000000000463D3E-mapping.dmp
    • memory/1492-68-0x0000000000400000-0x0000000000468000-memory.dmp
      Filesize

      416KB

    • memory/1492-71-0x0000000000400000-0x0000000000468000-memory.dmp
      Filesize

      416KB

    • memory/1492-73-0x0000000000400000-0x0000000000468000-memory.dmp
      Filesize

      416KB

    • memory/1492-66-0x0000000000400000-0x0000000000468000-memory.dmp
      Filesize

      416KB

    • memory/1492-64-0x0000000000400000-0x0000000000468000-memory.dmp
      Filesize

      416KB

    • memory/1492-63-0x0000000000400000-0x0000000000468000-memory.dmp
      Filesize

      416KB

    • memory/1948-76-0x0000000000000000-mapping.dmp
    • memory/1948-79-0x0000000000B50000-0x0000000000B80000-memory.dmp
      Filesize

      192KB