Analysis

  • max time kernel
    128s
  • max time network
    135s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    26/06/2021, 10:31

General

  • Target
    2dd214b7750c889a14bb6c1be4ff3b32e1bce2fba8d27.exe
  • Size 784KB
  • Sample210626-b2z23wd1ps
  • SHA256 2dd214b7750c889a14bb6c1be4ff3b32e1bce2fba8d274de69b36b442486a1c6
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • cryptbot

C2
  • cypvna62.top

  • morbai06.top

Attributes
  • payload_url

    http://dugzay09.top/download.php?file=lv.exe

Signatures

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

  • CryptBot Payload 2 IoCs
  • Blocklisted process makes network request 7 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 5 IoCs
  • Drops startup file 1 IoCs
  • 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 SetThreadContext 1 IoCs
  • Drops file in Program Files directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 23 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies registry class 1 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2dd214b7750c889a14bb6c1be4ff3b32e1bce2fba8d27.exe
    "C:\Users\Admin\AppData\Local\Temp\2dd214b7750c889a14bb6c1be4ff3b32e1bce2fba8d27.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:580
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\kOahaE.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4060
      • C:\Users\Admin\AppData\Local\Temp\kOahaE.exe
        "C:\Users\Admin\AppData\Local\Temp\kOahaE.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Drops file in Program Files directory
        • Suspicious use of WriteProcessMemory
        PID:1612
        • C:\Users\Admin\AppData\Local\Temp\New Feature\4.exe
          "C:\Users\Admin\AppData\Local\Temp\New Feature\4.exe"
          4⤵
          • Executes dropped EXE
          • Drops startup file
          • Suspicious use of WriteProcessMemory
          PID:3872
          • C:\Users\Admin\AppData\Roaming\Smart Clock\SmartClock.exe
            "C:\Users\Admin\AppData\Roaming\Smart Clock\SmartClock.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: AddClipboardFormatListener
            PID:2180
        • C:\Users\Admin\AppData\Local\Temp\New Feature\vpn.exe
          "C:\Users\Admin\AppData\Local\Temp\New Feature\vpn.exe"
          4⤵
          • Executes dropped EXE
          • Checks processor information in registry
          • Modifies registry class
          • Suspicious use of WriteProcessMemory
          PID:3852
          • C:\Users\Admin\AppData\Local\Temp\wgftism.exe
            "C:\Users\Admin\AppData\Local\Temp\wgftism.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:1820
            • C:\Windows\SysWOW64\rundll32.exe
              C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\WGFTIS~1.TMP,S C:\Users\Admin\AppData\Local\Temp\wgftism.exe
              6⤵
              • Blocklisted process makes network request
              • Loads dropped DLL
              • Drops file in Program Files directory
              • Suspicious use of WriteProcessMemory
              PID:1448
              • C:\Windows\SysWOW64\rundll32.exe
                C:\Windows\system32\rundll32.exe C:\PROGRA~3\BKLNGF~1\KGJOCB~1.TMP,Si8b C:\Users\Admin\AppData\Local\Temp\WGFTIS~1.TMP
                7⤵
                • Blocklisted process makes network request
                • Loads dropped DLL
                • Suspicious use of SetThreadContext
                • Checks processor information in registry
                • Modifies system certificate store
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of FindShellTrayWindow
                • Suspicious use of WriteProcessMemory
                PID:3584
                • C:\Windows\system32\rundll32.exe
                  C:\Windows\system32\rundll32.exe C:\Windows\system32\shell32.dll,#61 17894
                  8⤵
                    PID:2008
                  • 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\tmp99FF.tmp.ps1"
                    8⤵
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2216
                  • 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\tmpB1DE.tmp.ps1"
                    8⤵
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    PID:3132
                    • C:\Windows\SysWOW64\nslookup.exe
                      "C:\Windows\system32\nslookup.exe" -type=any localhost
                      9⤵
                        PID:2144
                    • C:\Windows\SysWOW64\schtasks.exe
                      schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
                      8⤵
                        PID:4052
                      • C:\Windows\SysWOW64\schtasks.exe
                        schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
                        8⤵
                          PID:3864
                  • C:\Windows\SysWOW64\WScript.exe
                    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\ufdpvvgy.vbs"
                    5⤵
                      PID:3796
                    • C:\Windows\SysWOW64\WScript.exe
                      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\cquroldixgbr.vbs"
                      5⤵
                      • Blocklisted process makes network request
                      • Modifies system certificate store
                      PID:2480
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\UaMiURaPHCW & timeout 3 & del /f /q "C:\Users\Admin\AppData\Local\Temp\2dd214b7750c889a14bb6c1be4ff3b32e1bce2fba8d27.exe"
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:1744
                • C:\Windows\SysWOW64\timeout.exe
                  timeout 3
                  3⤵
                  • Delays execution with timeout.exe
                  PID:2544

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  memory/580-115-0x0000000000400000-0x0000000000962000-memory.dmp

                  memory/580-114-0x0000000002840000-0x0000000002921000-memory.dmp

                  memory/1448-154-0x0000000004290000-0x00000000043D0000-memory.dmp

                  memory/1820-155-0x0000000000400000-0x00000000009C3000-memory.dmp

                  memory/1820-153-0x00000000027B0000-0x000000000289D000-memory.dmp

                  memory/2008-168-0x00000000009C0000-0x0000000000B60000-memory.dmp

                  memory/2008-169-0x000001DF5FC70000-0x000001DF5FE21000-memory.dmp

                  memory/2180-147-0x0000000000A50000-0x0000000000A76000-memory.dmp

                  memory/2180-148-0x0000000000400000-0x0000000000900000-memory.dmp

                  memory/2216-181-0x00000000080E0000-0x00000000080E1000-memory.dmp

                  memory/2216-185-0x0000000008570000-0x0000000008571000-memory.dmp

                  memory/2216-195-0x0000000004893000-0x0000000004894000-memory.dmp

                  memory/2216-192-0x00000000093F0000-0x00000000093F1000-memory.dmp

                  memory/2216-191-0x0000000009140000-0x0000000009141000-memory.dmp

                  memory/2216-190-0x0000000009BB0000-0x0000000009BB1000-memory.dmp

                  memory/2216-173-0x0000000004900000-0x0000000004901000-memory.dmp

                  memory/2216-174-0x00000000072D0000-0x00000000072D1000-memory.dmp

                  memory/2216-175-0x0000000004890000-0x0000000004891000-memory.dmp

                  memory/2216-177-0x00000000079E0000-0x00000000079E1000-memory.dmp

                  memory/2216-176-0x0000000004892000-0x0000000004893000-memory.dmp

                  memory/2216-178-0x0000000007C30000-0x0000000007C31000-memory.dmp

                  memory/2216-179-0x0000000007CA0000-0x0000000007CA1000-memory.dmp

                  memory/2216-180-0x0000000007D10000-0x0000000007D11000-memory.dmp

                  memory/2216-183-0x00000000084B0000-0x00000000084B1000-memory.dmp

                  memory/2216-182-0x0000000008100000-0x0000000008101000-memory.dmp

                  memory/3132-203-0x00000000047A0000-0x00000000047A1000-memory.dmp

                  memory/3132-222-0x00000000047A3000-0x00000000047A4000-memory.dmp

                  memory/3132-210-0x00000000080A0000-0x00000000080A1000-memory.dmp

                  memory/3132-207-0x0000000007C80000-0x0000000007C81000-memory.dmp

                  memory/3132-204-0x00000000047A2000-0x00000000047A3000-memory.dmp

                  memory/3584-167-0x00000000029C0000-0x00000000029C1000-memory.dmp

                  memory/3584-162-0x0000000002A00000-0x0000000002B40000-memory.dmp

                  memory/3852-138-0x0000000000400000-0x0000000000902000-memory.dmp

                  memory/3852-137-0x0000000000C90000-0x0000000000CB4000-memory.dmp

                  memory/3872-135-0x0000000000900000-0x0000000000A4A000-memory.dmp

                  memory/3872-136-0x0000000000400000-0x0000000000900000-memory.dmp