Analysis

  • max time kernel
    138s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    25/12/2020, 08:51

General

  • Target
    55eef1be7b19e0f52556a646368aefc2.exe
  • Size 5.3MB
  • Sample201225-befylspmn6
  • SHA256 23b038034753de2b160a1039ad4f724f0cb75d57d0f73af56d592850c82a20cb
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Blocklisted process makes network request 5 IoCs
  • Executes dropped EXE 5 IoCs
  • UPX packed file 2 IoCs

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

  • Checks BIOS information in registry 2 TTPs 8 IoCs

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

  • Drops startup file 1 IoCs
  • Identifies Wine through registry keys 2 TTPs 4 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • 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.

  • Checks installed software on the system 1 TTPs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs
  • Checks processor information in registry 2 TTPs 4 IoCs

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

  • Delays execution with timeout.exe 2 IoCs
  • Modifies registry class 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\55eef1be7b19e0f52556a646368aefc2.exe
    "C:\Users\Admin\AppData\Local\Temp\55eef1be7b19e0f52556a646368aefc2.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:732
    • C:\Users\Admin\AppData\Local\Temp\New Feature\4_ico.exe
      "C:\Users\Admin\AppData\Local\Temp\New Feature\4_ico.exe"
      2⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Drops startup file
      • Identifies Wine through registry keys
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1724
      • C:\Users\Admin\AppData\Roaming\Smart Clock\SmartClock.exe
        "C:\Users\Admin\AppData\Roaming\Smart Clock\SmartClock.exe"
        3⤵
        • Executes dropped EXE
        • Checks BIOS information in registry
        • Identifies Wine through registry keys
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious behavior: EnumeratesProcesses
        PID:1980
    • C:\Users\Admin\AppData\Local\Temp\New Feature\6_ico.exe
      "C:\Users\Admin\AppData\Local\Temp\New Feature\6_ico.exe"
      2⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Identifies Wine through registry keys
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1932
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c rd /s /q C:\ProgramData\kepvgkko & timeout 2 & del /f /q "C:\Users\Admin\AppData\Local\Temp\New Feature\6_ico.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1848
        • C:\Windows\SysWOW64\timeout.exe
          timeout 2
          4⤵
          • Delays execution with timeout.exe
          PID:2412
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c rd /s /q C:\ProgramData\kepvgkko & timeout 2 & del /f /q "C:\Users\Admin\AppData\Local\Temp\New Feature\6_ico.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2188
        • C:\Windows\SysWOW64\timeout.exe
          timeout 2
          4⤵
          • Delays execution with timeout.exe
          PID:1736
    • C:\Users\Admin\AppData\Local\Temp\New Feature\vpn_ico.exe
      "C:\Users\Admin\AppData\Local\Temp\New Feature\vpn_ico.exe"
      2⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Identifies Wine through registry keys
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Checks processor information in registry
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1872
      • C:\Users\Admin\AppData\Local\Temp\qfhhkra.exe
        "C:\Users\Admin\AppData\Local\Temp\qfhhkra.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:188
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\QFHHKR~1.DLL,Z C:\Users\Admin\AppData\Local\Temp\qfhhkra.exe
          4⤵
          • Loads dropped DLL
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1160
          • C:\Windows\SysWOW64\RUNDLL32.EXE
            C:\Windows\system32\RUNDLL32.EXE C:\Users\Admin\AppData\Local\Temp\QFHHKR~1.DLL,V0USTI1W
            5⤵
            • Blocklisted process makes network request
            • Loads dropped DLL
            • Checks processor information in registry
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of FindShellTrayWindow
            • Suspicious use of WriteProcessMemory
            PID:3556
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Executionpolicy bypass -File "C:\Users\Admin\AppData\Local\Temp\tmpA1C4.tmp.ps1"
              6⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:4164
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Executionpolicy bypass -File "C:\Users\Admin\AppData\Local\Temp\tmpC51D.tmp.ps1"
              6⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:4504
              • C:\Windows\SysWOW64\nslookup.exe
                "C:\Windows\system32\nslookup.exe" -type=any localhost
                7⤵
                  PID:4676
              • C:\Windows\SysWOW64\schtasks.exe
                schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
                6⤵
                  PID:4712
                • C:\Windows\SysWOW64\schtasks.exe
                  schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
                  6⤵
                    PID:4760
            • C:\Windows\SysWOW64\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\adwdmtmped.vbs"
              3⤵
                PID:3568
              • C:\Windows\SysWOW64\WScript.exe
                "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\gfgjnay.vbs"
                3⤵
                • Blocklisted process makes network request
                • Modifies system certificate store
                PID:4400

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                memory/188-29-0x0000000005D70000-0x0000000005D71000-memory.dmp

                memory/1160-42-0x0000000004D60000-0x00000000053BF000-memory.dmp

                memory/1724-18-0x0000000004B30000-0x0000000004B31000-memory.dmp

                memory/1724-17-0x0000000005330000-0x0000000005331000-memory.dmp

                memory/1724-13-0x0000000004B30000-0x0000000004B31000-memory.dmp

                memory/1872-16-0x0000000004CA0000-0x0000000004CA1000-memory.dmp

                memory/1872-14-0x00000000044A0000-0x00000000044A1000-memory.dmp

                memory/1932-12-0x0000000004A90000-0x0000000004A91000-memory.dmp

                memory/1932-15-0x0000000005290000-0x0000000005291000-memory.dmp

                memory/1980-22-0x0000000004850000-0x0000000004851000-memory.dmp

                memory/1980-23-0x0000000005050000-0x0000000005051000-memory.dmp

                memory/3556-47-0x0000000004B80000-0x00000000051DF000-memory.dmp

                memory/4164-62-0x0000000009B30000-0x0000000009B31000-memory.dmp

                memory/4164-64-0x0000000008090000-0x0000000008091000-memory.dmp

                memory/4164-59-0x0000000008390000-0x0000000008391000-memory.dmp

                memory/4164-57-0x0000000007A90000-0x0000000007A91000-memory.dmp

                memory/4164-61-0x0000000008490000-0x0000000008491000-memory.dmp

                memory/4164-56-0x0000000007BA0000-0x0000000007BA1000-memory.dmp

                memory/4164-63-0x00000000090B0000-0x00000000090B1000-memory.dmp

                memory/4164-51-0x0000000004850000-0x0000000004851000-memory.dmp

                memory/4164-55-0x0000000007B30000-0x0000000007B31000-memory.dmp

                memory/4164-52-0x0000000007340000-0x0000000007341000-memory.dmp

                memory/4164-54-0x0000000007AC0000-0x0000000007AC1000-memory.dmp

                memory/4164-58-0x0000000008580000-0x0000000008581000-memory.dmp

                memory/4164-53-0x00000000071C0000-0x00000000071C1000-memory.dmp

                memory/4164-50-0x0000000070470000-0x0000000070B5E000-memory.dmp

                memory/4504-79-0x00000000079E0000-0x00000000079E1000-memory.dmp

                memory/4504-76-0x0000000007690000-0x0000000007691000-memory.dmp

                memory/4504-70-0x0000000070150000-0x000000007083E000-memory.dmp