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Analysis

  • max time kernel
    1798s
  • max time network
    1809s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    29/07/2021, 11:26

General

  • Target

    8 (2).exe

  • Size

    3.0MB

  • MD5

    bb072cad921aa5ce8b97706ce01bc570

  • SHA1

    18bf034906c1341b7817e7361ad27a4425d820bd

  • SHA256

    817a50d00909383bbef41e6f4e61b527d55f0873bcf745b29dbba75f52fe2e97

  • SHA512

    d40e5f77d882ed29bd9de5a6848072e2f81cd02176955e2b1a4aedcdf4eb687d77bebe33cef0c7d702bc828181755f86e2564523d476adbb785f396a5ce1d474

Malware Config

Extracted

Family

vidar

Version

39.6

Botnet

933

C2

https://sslamlssa1.tumblr.com/

Attributes
  • profile_id

    933

Signatures

  • Modifies Windows Defender Real-time Protection settings 3 TTPs
  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer 2 IoCs
  • ASPack v2.12-2.42 18 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Executes dropped EXE 10 IoCs
  • UPX packed file 6 IoCs

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

  • Loads dropped DLL 53 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Modifies system certificate store 2 TTPs 11 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8 (2).exe
    "C:\Users\Admin\AppData\Local\Temp\8 (2).exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1828
    • C:\Users\Admin\AppData\Local\Temp\setup_installer.exe
      "C:\Users\Admin\AppData\Local\Temp\setup_installer.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1412
      • C:\Users\Admin\AppData\Local\Temp\7zS4853AAB4\setup_install.exe
        "C:\Users\Admin\AppData\Local\Temp\7zS4853AAB4\setup_install.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:460
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c sonia_1.exe
          4⤵
            PID:1632
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c sonia_2.exe
            4⤵
              PID:1572
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /c sonia_3.exe
              4⤵
              • Loads dropped DLL
              • Suspicious use of WriteProcessMemory
              PID:996
              • C:\Users\Admin\AppData\Local\Temp\7zS4853AAB4\sonia_3.exe
                sonia_3.exe
                5⤵
                • Executes dropped EXE
                • Loads dropped DLL
                PID:1892
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 1892 -s 948
                  6⤵
                  • Loads dropped DLL
                  • Program crash
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious behavior: GetForegroundWindowSpam
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1240
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /c sonia_7.exe
              4⤵
                PID:1912
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /c sonia_6.exe
                4⤵
                • Loads dropped DLL
                PID:1732
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /c sonia_5.exe
                4⤵
                • Loads dropped DLL
                PID:1000
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /c sonia_4.exe
                4⤵
                • Loads dropped DLL
                PID:296
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 460 -s 412
                4⤵
                • Loads dropped DLL
                • Program crash
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious behavior: GetForegroundWindowSpam
                • Suspicious use of AdjustPrivilegeToken
                PID:1840
        • C:\Users\Admin\AppData\Local\Temp\7zS4853AAB4\sonia_4.exe
          sonia_4.exe
          1⤵
          • Executes dropped EXE
          • Modifies system certificate store
          • Suspicious use of AdjustPrivilegeToken
          PID:1656
        • C:\Users\Admin\AppData\Local\Temp\7zS4853AAB4\sonia_5.exe
          sonia_5.exe
          1⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1624
        • C:\Users\Admin\AppData\Local\Temp\7zS4853AAB4\sonia_6.exe
          sonia_6.exe
          1⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Adds Run key to start application
          • Modifies system certificate store
          PID:1640
          • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
            C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
            2⤵
            • Executes dropped EXE
            • Loads dropped DLL
            PID:1556
          • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
            C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
            2⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious behavior: EnumeratesProcesses
            PID:820
          • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
            C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
            2⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious behavior: EnumeratesProcesses
            PID:2008
          • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
            C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
            2⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious behavior: EnumeratesProcesses
            PID:964

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/460-91-0x000000006B280000-0x000000006B2A6000-memory.dmp

          Filesize

          152KB

        • memory/460-95-0x0000000064940000-0x0000000064959000-memory.dmp

          Filesize

          100KB

        • memory/460-98-0x000000006FE40000-0x000000006FFC6000-memory.dmp

          Filesize

          1.5MB

        • memory/460-89-0x000000006B440000-0x000000006B4CF000-memory.dmp

          Filesize

          572KB

        • memory/460-105-0x000000006B280000-0x000000006B2A6000-memory.dmp

          Filesize

          152KB

        • memory/460-97-0x000000006B440000-0x000000006B4CF000-memory.dmp

          Filesize

          572KB

        • memory/460-93-0x0000000064940000-0x0000000064959000-memory.dmp

          Filesize

          100KB

        • memory/460-90-0x000000006FE40000-0x000000006FFC6000-memory.dmp

          Filesize

          1.5MB

        • memory/460-96-0x0000000064940000-0x0000000064959000-memory.dmp

          Filesize

          100KB

        • memory/460-106-0x0000000000400000-0x000000000051D000-memory.dmp

          Filesize

          1.1MB

        • memory/460-92-0x0000000000400000-0x000000000051D000-memory.dmp

          Filesize

          1.1MB

        • memory/460-94-0x0000000064940000-0x0000000064959000-memory.dmp

          Filesize

          100KB

        • memory/1240-174-0x00000000003B0000-0x00000000003B1000-memory.dmp

          Filesize

          4KB

        • memory/1656-145-0x000000001B0F0000-0x000000001B0F2000-memory.dmp

          Filesize

          8KB

        • memory/1656-133-0x00000000001D0000-0x00000000001D1000-memory.dmp

          Filesize

          4KB

        • memory/1828-60-0x0000000075511000-0x0000000075513000-memory.dmp

          Filesize

          8KB

        • memory/1840-163-0x0000000000690000-0x0000000000691000-memory.dmp

          Filesize

          4KB

        • memory/1892-151-0x0000000000A70000-0x0000000000B0D000-memory.dmp

          Filesize

          628KB

        • memory/1892-152-0x0000000000400000-0x00000000008F2000-memory.dmp

          Filesize

          4.9MB