Analysis

  • max time kernel
    158s
  • max time network
    165s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    26/07/2021, 13:42

General

  • Target
    61763efd92c56bd89787f9bd24ff509b.exe
  • Size 316KB
  • Sample210726-6yr2zekcw2
  • SHA256 7b608f567cdbb7a9ccce2a9937b34bb3b73e178efc3d2b9bc29e5fe905462bee
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • smokeloader

Version
  • 2020

C2
  • http://readinglistforjuly1.xyz/

  • http://readinglistforjuly2.xyz/

  • http://readinglistforjuly3.xyz/

  • http://readinglistforjuly4.xyz/

  • http://readinglistforjuly5.xyz/

  • http://readinglistforjuly6.xyz/

  • http://readinglistforjuly7.xyz/

  • http://readinglistforjuly8.xyz/

  • http://readinglistforjuly9.xyz/

  • http://readinglistforjuly10.xyz/

  • http://readinglistforjuly1.site/

  • http://readinglistforjuly2.site/

  • http://readinglistforjuly3.site/

  • http://readinglistforjuly4.site/

  • http://readinglistforjuly5.site/

  • http://readinglistforjuly6.site/

  • http://readinglistforjuly7.site/

  • http://readinglistforjuly8.site/

  • http://readinglistforjuly9.site/

  • http://readinglistforjuly10.site/

rc4.i32
rc4.i32
rc4.i32
rc4.i32

Extracted

Family
  • vidar

Version
  • 39.7

Botnet
  • 408

C2
  • https://shpak125.tumblr.com/

Attributes
  • profile_id

    408

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Vidar Stealer 2 IoCs
  • Creates new service(s) 1 TTPs
  • Downloads MZ/PE file
  • Executes dropped EXE 10 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Sets service image path in registry 2 TTPs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

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

  • Deletes itself 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.

  • Themida packer 4 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 6 IoCs

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

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 20 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\61763efd92c56bd89787f9bd24ff509b.exe
    "C:\Users\Admin\AppData\Local\Temp\61763efd92c56bd89787f9bd24ff509b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:872
    • C:\Users\Admin\AppData\Local\Temp\61763efd92c56bd89787f9bd24ff509b.exe
      "C:\Users\Admin\AppData\Local\Temp\61763efd92c56bd89787f9bd24ff509b.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:1932
  • C:\Users\Admin\AppData\Local\Temp\45E6.exe
    C:\Users\Admin\AppData\Local\Temp\45E6.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetWindowsHookEx
    PID:460
  • C:\Users\Admin\AppData\Local\Temp\55EE.exe
    C:\Users\Admin\AppData\Local\Temp\55EE.exe
    1⤵
    • Executes dropped EXE
    • Modifies system certificate store
    PID:556
  • C:\Users\Admin\AppData\Local\Temp\57D2.exe
    C:\Users\Admin\AppData\Local\Temp\57D2.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Modifies system certificate store
    PID:1120
  • C:\Users\Admin\AppData\Local\Temp\6184.exe
    C:\Users\Admin\AppData\Local\Temp\6184.exe
    1⤵
    • Executes dropped EXE
    PID:1608
  • C:\Users\Admin\AppData\Local\Temp\65E8.exe
    C:\Users\Admin\AppData\Local\Temp\65E8.exe
    1⤵
    • Executes dropped EXE
    PID:428
  • C:\Users\Admin\AppData\Local\Temp\7120.exe
    C:\Users\Admin\AppData\Local\Temp\7120.exe
    1⤵
    • Executes dropped EXE
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    PID:1724
  • C:\Users\Admin\AppData\Local\Temp\78DE.exe
    C:\Users\Admin\AppData\Local\Temp\78DE.exe
    1⤵
    • Executes dropped EXE
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    PID:824
  • C:\Users\Admin\AppData\Local\Temp\7B01.exe
    C:\Users\Admin\AppData\Local\Temp\7B01.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1588
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tocmyxdr\
      2⤵
        PID:1328
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nruqclie.exe" C:\Windows\SysWOW64\tocmyxdr\
        2⤵
          PID:288
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tocmyxdr binPath= "C:\Windows\SysWOW64\tocmyxdr\nruqclie.exe /d\"C:\Users\Admin\AppData\Local\Temp\7B01.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1712
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description tocmyxdr "wifi internet conection"
            2⤵
              PID:548
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start tocmyxdr
              2⤵
                PID:696
              • C:\Windows\SysWOW64\netsh.exe
                "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
                2⤵
                  PID:1084
              • C:\Users\Admin\AppData\Local\Temp\7E5C.exe
                C:\Users\Admin\AppData\Local\Temp\7E5C.exe
                1⤵
                • Executes dropped EXE
                • Loads dropped DLL
                • Checks SCSI registry key(s)
                • Suspicious behavior: MapViewOfSection
                PID:1504
              • C:\Windows\SysWOW64\explorer.exe
                C:\Windows\SysWOW64\explorer.exe
                1⤵
                  PID:1308
                • C:\Windows\explorer.exe
                  C:\Windows\explorer.exe
                  1⤵
                    PID:1960
                  • C:\Windows\SysWOW64\explorer.exe
                    C:\Windows\SysWOW64\explorer.exe
                    1⤵
                      PID:1916
                    • C:\Windows\explorer.exe
                      C:\Windows\explorer.exe
                      1⤵
                        PID:628
                      • C:\Windows\SysWOW64\explorer.exe
                        C:\Windows\SysWOW64\explorer.exe
                        1⤵
                          PID:1936
                        • C:\Windows\SysWOW64\tocmyxdr\nruqclie.exe
                          C:\Windows\SysWOW64\tocmyxdr\nruqclie.exe /d"C:\Users\Admin\AppData\Local\Temp\7B01.exe"
                          1⤵
                          • Executes dropped EXE
                          • Suspicious use of SetThreadContext
                          PID:948
                          • C:\Windows\SysWOW64\svchost.exe
                            svchost.exe
                            2⤵
                              PID:1224
                          • C:\Windows\explorer.exe
                            C:\Windows\explorer.exe
                            1⤵
                              PID:1764
                            • C:\Windows\SysWOW64\explorer.exe
                              C:\Windows\SysWOW64\explorer.exe
                              1⤵
                                PID:1816
                              • C:\Windows\explorer.exe
                                C:\Windows\explorer.exe
                                1⤵
                                  PID:1604
                                • C:\Windows\SysWOW64\explorer.exe
                                  C:\Windows\SysWOW64\explorer.exe
                                  1⤵
                                    PID:1908

                                  Network

                                        MITRE ATT&CK Enterprise v6

                                        Replay Monitor

                                        Loading Replay Monitor...

                                        Downloads

                                        memory/428-93-0x0000000000400000-0x00000000004AE000-memory.dmp

                                        memory/556-82-0x0000000000400000-0x00000000004C3000-memory.dmp

                                        memory/556-76-0x00000000004D0000-0x000000000056D000-memory.dmp

                                        memory/628-131-0x0000000000060000-0x000000000006F000-memory.dmp

                                        memory/628-130-0x0000000000070000-0x0000000000079000-memory.dmp

                                        memory/824-99-0x0000000001110000-0x0000000001111000-memory.dmp

                                        memory/872-63-0x00000000001C0000-0x00000000001CA000-memory.dmp

                                        memory/948-157-0x0000000000400000-0x000000000046E000-memory.dmp

                                        memory/1120-80-0x0000000000220000-0x00000000002B1000-memory.dmp

                                        memory/1120-86-0x0000000000400000-0x00000000004AE000-memory.dmp

                                        memory/1212-143-0x0000000002950000-0x0000000002966000-memory.dmp

                                        memory/1212-64-0x0000000002A00000-0x0000000002A16000-memory.dmp

                                        memory/1224-153-0x0000000000080000-0x0000000000095000-memory.dmp

                                        memory/1308-119-0x0000000000100000-0x000000000016B000-memory.dmp

                                        memory/1308-118-0x0000000000170000-0x00000000001E4000-memory.dmp

                                        memory/1308-112-0x0000000072231000-0x0000000072233000-memory.dmp

                                        memory/1504-109-0x0000000000220000-0x0000000000229000-memory.dmp

                                        memory/1504-111-0x0000000000400000-0x000000000046E000-memory.dmp

                                        memory/1588-110-0x0000000000400000-0x000000000046E000-memory.dmp

                                        memory/1588-107-0x00000000001B0000-0x00000000001C3000-memory.dmp

                                        memory/1604-154-0x00000000000E0000-0x00000000000E9000-memory.dmp

                                        memory/1604-152-0x00000000000F0000-0x00000000000F5000-memory.dmp

                                        memory/1608-87-0x0000000000400000-0x00000000004AE000-memory.dmp

                                        memory/1724-101-0x0000000000270000-0x0000000000271000-memory.dmp

                                        memory/1764-142-0x0000000000060000-0x000000000006C000-memory.dmp

                                        memory/1764-141-0x0000000000070000-0x0000000000076000-memory.dmp

                                        memory/1816-150-0x0000000000100000-0x0000000000109000-memory.dmp

                                        memory/1816-148-0x0000000000110000-0x0000000000114000-memory.dmp

                                        memory/1908-161-0x0000000000090000-0x0000000000095000-memory.dmp

                                        memory/1908-162-0x0000000000080000-0x0000000000089000-memory.dmp

                                        memory/1916-125-0x0000000000090000-0x0000000000097000-memory.dmp

                                        memory/1916-126-0x0000000000080000-0x000000000008B000-memory.dmp

                                        memory/1916-123-0x00000000720C1000-0x00000000720C3000-memory.dmp

                                        memory/1932-62-0x0000000075AF1000-0x0000000075AF3000-memory.dmp

                                        memory/1932-60-0x0000000000400000-0x0000000000409000-memory.dmp

                                        memory/1936-136-0x0000000000090000-0x0000000000095000-memory.dmp

                                        memory/1936-138-0x0000000000080000-0x0000000000089000-memory.dmp

                                        memory/1960-116-0x0000000000070000-0x0000000000077000-memory.dmp

                                        memory/1960-117-0x0000000000060000-0x000000000006C000-memory.dmp