Analysis

  • max time kernel
    125s
  • max time network
    125s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    02/12/2020, 14:46

General

  • Target
    c5a957af29dadb89d9411782ebd512a9.exe
  • Size 666KB
  • Sample201202-vt3mrbvnzx
  • SHA256 07cf6baf41520d0e97f2010bf76c2ed10509fbf599209ae4bc250eb375515114
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Blacklisted process makes network request 5 IoCs
  • Executes dropped EXE 7 IoCs
  • 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 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • 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.

  • 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
  • Drops file in Program Files directory 7 IoCs
  • Checks processor information in registry 2 TTPs 6 IoCs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 1 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 8 IoCs
  • Suspicious use of FindShellTrayWindow 6 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs
  • Suspicious use of WriteProcessMemory 63 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c5a957af29dadb89d9411782ebd512a9.exe
    "C:\Users\Admin\AppData\Local\Temp\c5a957af29dadb89d9411782ebd512a9.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:2868
    • C:\Users\Admin\AppData\Local\Temp\File2.exe
      "C:\Users\Admin\AppData\Local\Temp\File2.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:3516
      • C:\Program Files (x86)\solfer\boleroh\lvlar.exe
        "C:\Program Files (x86)\solfer\boleroh\lvlar.exe"
        3⤵
        • Executes dropped EXE
        • Checks BIOS information in registry
        • Identifies Wine through registry keys
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:3892
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\effayof.exe"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1172
          • C:\Users\Admin\AppData\Local\Temp\effayof.exe
            "C:\Users\Admin\AppData\Local\Temp\effayof.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:1324
            • C:\Windows\SysWOW64\rundll32.exe
              C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\EFFAYO~1.DLL,Z C:\Users\Admin\AppData\Local\Temp\effayof.exe
              6⤵
              • Loads dropped DLL
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:568
              • C:\Windows\SysWOW64\RUNDLL32.EXE
                C:\Windows\system32\RUNDLL32.EXE C:\Users\Admin\AppData\Local\Temp\EFFAYO~1.DLL,PxgnfI0g
                7⤵
                • Blacklisted 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:3956
                • 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\tmp956B.tmp.ps1"
                  8⤵
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3480
                • 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\tmpB6A1.tmp.ps1"
                  8⤵
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of WriteProcessMemory
                  PID:3176
                  • C:\Windows\SysWOW64\nslookup.exe
                    "C:\Windows\system32\nslookup.exe" -type=any localhost
                    9⤵
                      PID:2244
                  • C:\Windows\SysWOW64\schtasks.exe
                    schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
                    8⤵
                      PID:2580
                    • C:\Windows\SysWOW64\schtasks.exe
                      schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
                      8⤵
                        PID:3844
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\nfaqxdnow.vbs"
                4⤵
                • Modifies registry class
                • Suspicious use of WriteProcessMemory
                PID:3476
                • C:\Windows\SysWOW64\WScript.exe
                  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\nfaqxdnow.vbs"
                  5⤵
                  • Blacklisted process makes network request
                  • Modifies system certificate store
                  PID:1504
            • C:\Program Files (x86)\solfer\4pla.exe
              "C:\Program Files (x86)\solfer\4pla.exe"
              3⤵
              • 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:3840
              • C:\Users\Admin\AppData\Roaming\Smart Clock\SmartClock.exe
                "C:\Users\Admin\AppData\Roaming\Smart Clock\SmartClock.exe"
                4⤵
                • Executes dropped EXE
                • Checks BIOS information in registry
                • Identifies Wine through registry keys
                • Suspicious use of NtSetInformationThreadHideFromDebugger
                • Suspicious behavior: AddClipboardFormatListener
                • Suspicious behavior: EnumeratesProcesses
                PID:2744
            • C:\Program Files (x86)\solfer\startver.exe
              "C:\Program Files (x86)\solfer\startver.exe"
              3⤵
              • Executes dropped EXE
              • Checks BIOS information in registry
              • Identifies Wine through registry keys
              • Suspicious use of NtSetInformationThreadHideFromDebugger
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of FindShellTrayWindow
              • Suspicious use of SendNotifyMessage
              • Suspicious use of WriteProcessMemory
              PID:1292
              • C:\Users\Admin\AppData\Local\Temp\CL_Debug_Log.txt
                C:\Users\Admin\AppData\Local\Temp\CL_Debug_Log.txt e -p"JDQJndnqwdnqw2139dn21n3b312idDQDB" "C:\Users\Admin\AppData\Local\Temp\CR_Debug_Log.txt" -o"C:\Users\Admin\AppData\Local\Temp\"
                4⤵
                • Executes dropped EXE
                • Suspicious use of AdjustPrivilegeToken
                PID:1320
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /c schtasks.exe /Create /XML "C:\Users\Admin\AppData\Local\Temp\SystemCheck.xml" /TN "System\SystemCheck"
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:784
                • C:\Windows\SysWOW64\schtasks.exe
                  schtasks.exe /Create /XML "C:\Users\Admin\AppData\Local\Temp\SystemCheck.xml" /TN "System\SystemCheck"
                  5⤵
                  • Creates scheduled task(s)
                  PID:1336
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\w8qUWnmWI3 & timeout 2 & del /f /q "C:\Users\Admin\AppData\Local\Temp\c5a957af29dadb89d9411782ebd512a9.exe"
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1892
            • C:\Windows\SysWOW64\timeout.exe
              timeout 2
              3⤵
              • Delays execution with timeout.exe
              PID:2072

        Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              memory/568-58-0x0000000004AC0000-0x0000000005120000-memory.dmp

              memory/1292-28-0x000000000AD70000-0x000000000AD71000-memory.dmp

              memory/1292-29-0x000000000B570000-0x000000000B571000-memory.dmp

              memory/1324-53-0x0000000002FD0000-0x0000000002FD1000-memory.dmp

              memory/2744-36-0x00000000048E0000-0x00000000048E1000-memory.dmp

              memory/2744-34-0x00000000048E0000-0x00000000048E1000-memory.dmp

              memory/2744-35-0x00000000050E0000-0x00000000050E1000-memory.dmp

              memory/2868-2-0x0000000002A20000-0x0000000002A21000-memory.dmp

              memory/3176-93-0x00000000076E0000-0x00000000076E1000-memory.dmp

              memory/3176-87-0x0000000070900000-0x0000000070FEE000-memory.dmp

              memory/3176-96-0x0000000008060000-0x0000000008061000-memory.dmp

              memory/3480-74-0x0000000007E00000-0x0000000007E01000-memory.dmp

              memory/3480-69-0x0000000070F60000-0x000000007164E000-memory.dmp

              memory/3480-72-0x0000000007560000-0x0000000007561000-memory.dmp

              memory/3480-75-0x0000000007E70000-0x0000000007E71000-memory.dmp

              memory/3480-76-0x0000000008300000-0x0000000008301000-memory.dmp

              memory/3480-77-0x00000000087C0000-0x00000000087C1000-memory.dmp

              memory/3480-78-0x0000000008600000-0x0000000008601000-memory.dmp

              memory/3480-71-0x00000000077D0000-0x00000000077D1000-memory.dmp

              memory/3480-80-0x0000000008710000-0x0000000008711000-memory.dmp

              memory/3480-81-0x0000000009DD0000-0x0000000009DD1000-memory.dmp

              memory/3480-82-0x0000000009350000-0x0000000009351000-memory.dmp

              memory/3480-83-0x0000000007160000-0x0000000007161000-memory.dmp

              memory/3480-70-0x0000000004AF0000-0x0000000004AF1000-memory.dmp

              memory/3480-73-0x0000000007600000-0x0000000007601000-memory.dmp

              memory/3840-25-0x0000000004BC0000-0x0000000004BC1000-memory.dmp

              memory/3840-27-0x00000000053C0000-0x00000000053C1000-memory.dmp

              memory/3892-24-0x0000000004B90000-0x0000000004B91000-memory.dmp

              memory/3892-26-0x0000000005390000-0x0000000005391000-memory.dmp

              memory/3956-67-0x0000000004B50000-0x00000000051B0000-memory.dmp

              memory/3956-103-0x00000000060E0000-0x0000000006182000-memory.dmp