Analysis

  • max time kernel
    137s
  • max time network
    126s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    11/01/2021, 07:47

General

  • Target
    ab3580b5eb547523abf3c29133504c64.exe
  • Size 5.3MB
  • Sample210111-ejedv476k6
  • SHA256 1ba569c631438a0fb356441838ff328835d607e7cdb217cc444923c1ec58337b
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Blocklisted process makes network request 7 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\ab3580b5eb547523abf3c29133504c64.exe
    "C:\Users\Admin\AppData\Local\Temp\ab3580b5eb547523abf3c29133504c64.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1052
    • 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:3020
      • 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:3560
    • 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:3748
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c rd /s /q C:\ProgramData\rgytcwbqagf & timeout 2 & del /f /q "C:\Users\Admin\AppData\Local\Temp\New Feature\6_ico.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:720
        • C:\Windows\SysWOW64\timeout.exe
          timeout 2
          4⤵
          • Delays execution with timeout.exe
          PID:1528
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c rd /s /q C:\ProgramData\rgytcwbqagf & timeout 2 & del /f /q "C:\Users\Admin\AppData\Local\Temp\New Feature\6_ico.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4100
        • C:\Windows\SysWOW64\timeout.exe
          timeout 2
          4⤵
          • Delays execution with timeout.exe
          PID:4144
    • 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:2912
      • C:\Users\Admin\AppData\Local\Temp\dunijgijkc.exe
        "C:\Users\Admin\AppData\Local\Temp\dunijgijkc.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:3536
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\DUNIJG~1.DLL,Z C:\Users\Admin\AppData\Local\Temp\DUNIJG~1.EXE
          4⤵
          • Loads dropped DLL
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4184
          • C:\Windows\SysWOW64\RUNDLL32.EXE
            C:\Windows\system32\RUNDLL32.EXE C:\Users\Admin\AppData\Local\Temp\DUNIJG~1.DLL,ZloMfI0=
            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:4328
            • 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\tmpD9EB.tmp.ps1"
              6⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:4640
            • 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\tmpFA94.tmp.ps1"
              6⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:4924
              • C:\Windows\SysWOW64\nslookup.exe
                "C:\Windows\system32\nslookup.exe" -type=any localhost
                7⤵
                  PID:5096
              • C:\Windows\SysWOW64\schtasks.exe
                schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
                6⤵
                  PID:1008
                • C:\Windows\SysWOW64\schtasks.exe
                  schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
                  6⤵
                    PID:196
            • C:\Windows\SysWOW64\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\llcosxs.vbs"
              3⤵
                PID:2040
              • C:\Windows\SysWOW64\WScript.exe
                "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\yonfuhhrwq.vbs"
                3⤵
                • Blocklisted process makes network request
                • Modifies system certificate store
                PID:4524

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                memory/2912-17-0x0000000005270000-0x0000000005271000-memory.dmp

                memory/2912-16-0x0000000004A70000-0x0000000004A71000-memory.dmp

                memory/3020-14-0x00000000048A0000-0x00000000048A1000-memory.dmp

                memory/3020-15-0x00000000050A0000-0x00000000050A1000-memory.dmp

                memory/3020-18-0x00000000048A0000-0x00000000048A1000-memory.dmp

                memory/3536-30-0x0000000006D30000-0x0000000006D31000-memory.dmp

                memory/3560-23-0x00000000055A0000-0x00000000055A1000-memory.dmp

                memory/3560-22-0x0000000004DA0000-0x0000000004DA1000-memory.dmp

                memory/3748-12-0x0000000004B30000-0x0000000004B31000-memory.dmp

                memory/3748-13-0x0000000005330000-0x0000000005331000-memory.dmp

                memory/4184-43-0x0000000004B70000-0x00000000051CF000-memory.dmp

                memory/4328-51-0x0000000004FC0000-0x000000000561F000-memory.dmp

                memory/4640-63-0x0000000008480000-0x0000000008481000-memory.dmp

                memory/4640-62-0x00000000082F0000-0x00000000082F1000-memory.dmp

                memory/4640-64-0x0000000008760000-0x0000000008761000-memory.dmp

                memory/4640-56-0x0000000004BE0000-0x0000000004BE1000-memory.dmp

                memory/4640-66-0x0000000008890000-0x0000000008891000-memory.dmp

                memory/4640-67-0x0000000009EE0000-0x0000000009EE1000-memory.dmp

                memory/4640-68-0x0000000009460000-0x0000000009461000-memory.dmp

                memory/4640-69-0x00000000072A0000-0x00000000072A1000-memory.dmp

                memory/4640-55-0x0000000070F50000-0x000000007163E000-memory.dmp

                memory/4640-58-0x0000000007680000-0x0000000007681000-memory.dmp

                memory/4640-59-0x0000000007720000-0x0000000007721000-memory.dmp

                memory/4640-60-0x0000000007ED0000-0x0000000007ED1000-memory.dmp

                memory/4640-57-0x00000000077A0000-0x00000000077A1000-memory.dmp

                memory/4640-61-0x0000000007F50000-0x0000000007F51000-memory.dmp

                memory/4924-82-0x00000000080B0000-0x00000000080B1000-memory.dmp

                memory/4924-79-0x0000000007BD0000-0x0000000007BD1000-memory.dmp

                memory/4924-73-0x0000000070B00000-0x00000000711EE000-memory.dmp