Analysis

  • max time kernel
    143s
  • max time network
    136s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    17/06/2021, 06:44

General

  • Target
    208e8dd08e5487af9ec875fef96c168a.exe
  • Size 752KB
  • Sample210617-2fplrncebx
  • SHA256 f2da7bd4dc5321e7097af00b886cae56e28818c72d9e37a1f1988665034026df
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • cryptbot

C2
  • kiykhd42.top

  • morzui04.top

Attributes
  • payload_url

    http://peoqba05.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 4 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\208e8dd08e5487af9ec875fef96c168a.exe
    "C:\Users\Admin\AppData\Local\Temp\208e8dd08e5487af9ec875fef96c168a.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:3680
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\nYIlBslV.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3308
      • C:\Users\Admin\AppData\Local\Temp\nYIlBslV.exe
        "C:\Users\Admin\AppData\Local\Temp\nYIlBslV.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Drops file in Program Files directory
        • Suspicious use of WriteProcessMemory
        PID:3348
        • 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:1300
          • 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:2172
        • 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:2108
          • C:\Users\Admin\AppData\Local\Temp\vawmlkil.exe
            "C:\Users\Admin\AppData\Local\Temp\vawmlkil.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:2000
            • C:\Windows\SysWOW64\rundll32.exe
              C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\VAWMLK~1.TMP,S C:\Users\Admin\AppData\Local\Temp\vawmlkil.exe
              6⤵
              • Blocklisted process makes network request
              • Loads dropped DLL
              • Drops file in Program Files directory
              • Suspicious use of WriteProcessMemory
              PID:3016
              • C:\Windows\SysWOW64\rundll32.exe
                C:\Windows\system32\rundll32.exe C:\PROGRA~3\LAUVHF~1\JHAKLD~1.TMP,UxY9VA== C:\Users\Admin\AppData\Local\Temp\VAWMLK~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:2932
                • C:\Windows\system32\rundll32.exe
                  C:\Windows\system32\rundll32.exe C:\Windows\system32\shell32.dll,#61 31801
                  8⤵
                    PID:1288
                  • 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\tmp49AC.tmp.ps1"
                    8⤵
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:3400
                  • 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\tmp5C7B.tmp.ps1"
                    8⤵
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    PID:3348
                    • C:\Windows\SysWOW64\nslookup.exe
                      "C:\Windows\system32\nslookup.exe" -type=any localhost
                      9⤵
                        PID:496
                    • C:\Windows\SysWOW64\schtasks.exe
                      schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
                      8⤵
                        PID:3484
                      • C:\Windows\SysWOW64\schtasks.exe
                        schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
                        8⤵
                          PID:2132
                  • C:\Windows\SysWOW64\WScript.exe
                    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\vvufyooigof.vbs"
                    5⤵
                      PID:2608
                    • C:\Windows\SysWOW64\WScript.exe
                      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\dnltegso.vbs"
                      5⤵
                      • Blocklisted process makes network request
                      • Modifies system certificate store
                      PID:412
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\CodpxWDVCLb & timeout 3 & del /f /q "C:\Users\Admin\AppData\Local\Temp\208e8dd08e5487af9ec875fef96c168a.exe"
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:2104
                • C:\Windows\SysWOW64\timeout.exe
                  timeout 3
                  3⤵
                  • Delays execution with timeout.exe
                  PID:2152

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  memory/1288-173-0x0000000000800000-0x00000000009A0000-memory.dmp

                  memory/1288-172-0x0000019F7DB00000-0x0000019F7DCB1000-memory.dmp

                  memory/1300-139-0x0000000000400000-0x00000000008F3000-memory.dmp

                  memory/1300-138-0x00000000023D0000-0x00000000023F6000-memory.dmp

                  memory/2000-151-0x0000000000400000-0x00000000009B7000-memory.dmp

                  memory/2000-150-0x00000000026D0000-0x00000000027BD000-memory.dmp

                  memory/2108-140-0x0000000000900000-0x0000000000A4A000-memory.dmp

                  memory/2108-141-0x0000000000400000-0x00000000008F4000-memory.dmp

                  memory/2172-147-0x0000000000900000-0x0000000000A4A000-memory.dmp

                  memory/2172-148-0x0000000000400000-0x00000000008F3000-memory.dmp

                  memory/2932-171-0x0000000006650000-0x0000000006651000-memory.dmp

                  memory/3016-155-0x0000000004110000-0x0000000004251000-memory.dmp

                  memory/3348-213-0x0000000006F30000-0x0000000006F31000-memory.dmp

                  memory/3348-212-0x00000000082A0000-0x00000000082A1000-memory.dmp

                  memory/3348-215-0x0000000006F32000-0x0000000006F33000-memory.dmp

                  memory/3348-209-0x0000000007E60000-0x0000000007E61000-memory.dmp

                  memory/3348-226-0x0000000006F33000-0x0000000006F34000-memory.dmp

                  memory/3400-181-0x00000000077D0000-0x00000000077D1000-memory.dmp

                  memory/3400-184-0x0000000007DF0000-0x0000000007DF1000-memory.dmp

                  memory/3400-194-0x0000000009710000-0x0000000009711000-memory.dmp

                  memory/3400-195-0x0000000008CA0000-0x0000000008CA1000-memory.dmp

                  memory/3400-196-0x0000000008F50000-0x0000000008F51000-memory.dmp

                  memory/3400-187-0x0000000007F80000-0x0000000007F81000-memory.dmp

                  memory/3400-199-0x0000000004523000-0x0000000004524000-memory.dmp

                  memory/3400-186-0x0000000004522000-0x0000000004523000-memory.dmp

                  memory/3400-185-0x0000000004520000-0x0000000004521000-memory.dmp

                  memory/3400-189-0x00000000080B0000-0x00000000080B1000-memory.dmp

                  memory/3400-183-0x0000000007710000-0x0000000007711000-memory.dmp

                  memory/3400-182-0x0000000007860000-0x0000000007861000-memory.dmp

                  memory/3400-180-0x0000000007760000-0x0000000007761000-memory.dmp

                  memory/3400-179-0x00000000074E0000-0x00000000074E1000-memory.dmp

                  memory/3400-178-0x0000000006EB0000-0x0000000006EB1000-memory.dmp

                  memory/3400-177-0x0000000004440000-0x0000000004441000-memory.dmp

                  memory/3680-114-0x0000000002630000-0x0000000002711000-memory.dmp

                  memory/3680-115-0x0000000000400000-0x000000000095A000-memory.dmp