Analysis

  • max time kernel
    202s
  • max time network
    230s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    07/01/2024, 19:20

General

  • Target

    a1221c43754f0bf8adfe72560dabb5e2.exe

  • Size

    10.2MB

  • MD5

    a1221c43754f0bf8adfe72560dabb5e2

  • SHA1

    d28d5ffec4c801eddf253cd8f6bc22909dee244e

  • SHA256

    c4edf15d1762c66cdd4fc361fc423ce59fe23b5bea8609f611bd0c0518f5f39c

  • SHA512

    8b0c60f1f5a028d5accdd48b88993d1581d785f1c035e81d0dee6420a6fb840883decdf6ff28b5c5a6d6c16b048b3fffad402844774ce9a338185b2682c60109

  • SSDEEP

    49152:8vVGWdbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbP:8vV

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

lazystax.ru

Signatures

  • Tofsee

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

  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

    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).

  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a1221c43754f0bf8adfe72560dabb5e2.exe
    "C:\Users\Admin\AppData\Local\Temp\a1221c43754f0bf8adfe72560dabb5e2.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2544
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cvczdxzt\
      2⤵
        PID:2512
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\agrcujdp.exe" C:\Windows\SysWOW64\cvczdxzt\
        2⤵
          PID:1556
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create cvczdxzt binPath= "C:\Windows\SysWOW64\cvczdxzt\agrcujdp.exe /d\"C:\Users\Admin\AppData\Local\Temp\a1221c43754f0bf8adfe72560dabb5e2.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1892
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description cvczdxzt "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2756
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start cvczdxzt
          2⤵
          • Launches sc.exe
          PID:1912
        • 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⤵
          • Modifies Windows Firewall
          PID:1904
      • C:\Windows\SysWOW64\cvczdxzt\agrcujdp.exe
        C:\Windows\SysWOW64\cvczdxzt\agrcujdp.exe /d"C:\Users\Admin\AppData\Local\Temp\a1221c43754f0bf8adfe72560dabb5e2.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:576
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:2344

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\agrcujdp.exe

              Filesize

              3.9MB

              MD5

              942896d9800fa71b399e4893a1211fe4

              SHA1

              bc4054f5b9f39e734d12c6aaf3bfa66925cd45d9

              SHA256

              1583698b26fe9e3bd95b0c367d580630aa645cb118dc7c774933c731e4c8d648

              SHA512

              239e12cb278881f2936e6b010bbdaa82114f33f8d0a8a109045c9d97d1478a5fe6eb2a24f07d3c800d1dd7541666386cb1ccd9a94c1c9a9a242dc9b379338f77

            • C:\Windows\SysWOW64\cvczdxzt\agrcujdp.exe

              Filesize

              13.1MB

              MD5

              9d460bd0337e45c16e8bcabce4bf9d52

              SHA1

              68fa7fe0e084c4106838d566c5259101b0c0fa6b

              SHA256

              403c04935731b773463663ac2e4dda52cb3d4d73cf6d43f086885482dceaaee7

              SHA512

              e10289b3ba577e09debe5ae74925dc89f0093c8c68befe8f3062715218a06511d2c1c188cf573a1c72222deee9e5d2e02e65c9dae63a020a03c4e70454206721

            • memory/576-12-0x0000000000DF0000-0x0000000000EF0000-memory.dmp

              Filesize

              1024KB

            • memory/576-18-0x0000000000400000-0x0000000000C17000-memory.dmp

              Filesize

              8.1MB

            • memory/576-13-0x0000000000400000-0x0000000000C17000-memory.dmp

              Filesize

              8.1MB

            • memory/2344-14-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2344-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2344-24-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2344-23-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2344-22-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2344-17-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2344-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2544-2-0x00000000002C0000-0x00000000002D3000-memory.dmp

              Filesize

              76KB

            • memory/2544-7-0x0000000000400000-0x0000000000C17000-memory.dmp

              Filesize

              8.1MB

            • memory/2544-4-0x0000000000400000-0x0000000000C17000-memory.dmp

              Filesize

              8.1MB

            • memory/2544-9-0x00000000002C0000-0x00000000002D3000-memory.dmp

              Filesize

              76KB

            • memory/2544-3-0x0000000000400000-0x0000000000C17000-memory.dmp

              Filesize

              8.1MB

            • memory/2544-1-0x0000000000C90000-0x0000000000D90000-memory.dmp

              Filesize

              1024KB

            • memory/2544-8-0x0000000000400000-0x0000000000C17000-memory.dmp

              Filesize

              8.1MB