Analysis

  • max time kernel
    119s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    07/01/2024, 19:21

General

  • Target

    a2adb7966f88e6c0e15a8f5a04404fcf.exe

  • Size

    12.5MB

  • MD5

    a2adb7966f88e6c0e15a8f5a04404fcf

  • SHA1

    b208879afed8bb3bfe5882891363bbed3d1d94af

  • SHA256

    3cb6cffbee2f03febb5c5ffc0e6b6f7d06e184ee69c6d873bc4619fe4ebfcce7

  • SHA512

    d19acf346d6433e2c1f500bb6ed8c1b021f299eea18ae987220f2ca6baa678cfb4a06e65df9c6136d9f0e41459557b52a73e34449f0d18e6b76d3762bf23c97f

  • SSDEEP

    98304:DNWUlllllllllllllllllllllllllllllllllllllllllllllllllllllllllllH:hW

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

  • Tofsee

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

  • Windows security bypass 2 TTPs 1 IoCs
  • 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\a2adb7966f88e6c0e15a8f5a04404fcf.exe
    "C:\Users\Admin\AppData\Local\Temp\a2adb7966f88e6c0e15a8f5a04404fcf.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2416
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ziyvzfpp\
      2⤵
        PID:1996
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ygvzmktt.exe" C:\Windows\SysWOW64\ziyvzfpp\
        2⤵
          PID:2764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ziyvzfpp binPath= "C:\Windows\SysWOW64\ziyvzfpp\ygvzmktt.exe /d\"C:\Users\Admin\AppData\Local\Temp\a2adb7966f88e6c0e15a8f5a04404fcf.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2260
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ziyvzfpp "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2532
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ziyvzfpp
          2⤵
          • Launches sc.exe
          PID:2632
        • 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:2636
      • C:\Windows\SysWOW64\ziyvzfpp\ygvzmktt.exe
        C:\Windows\SysWOW64\ziyvzfpp\ygvzmktt.exe /d"C:\Users\Admin\AppData\Local\Temp\a2adb7966f88e6c0e15a8f5a04404fcf.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2664
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          PID:2756

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              1024KB

              MD5

              ac6d1876a306a54c19def1c8e257a8b9

              SHA1

              d960ba60e7b55e263143df239ae9f7b42dab73cf

              SHA256

              66ee251bbcbaacdf9062897c83e38e02fe331631b041caf6c03379744a7dd8b0

              SHA512

              a7c87cacd14dd1184156b6f554c7793faf638b2dac471474d1651ea101ca53711950fa0bfe1bdb487704d29c9d1efb94119d99180ee2cc0ccb0697cfb22dcf2a

            • C:\Windows\SysWOW64\ziyvzfpp\ygvzmktt.exe

              Filesize

              93KB

              MD5

              ea96e0346a6397f0459f83ca458841a7

              SHA1

              a979ce56ca0dbde04e0ec77b94c143fc4e7c3872

              SHA256

              154fbfb86c78f728df08893f8dfaf0e866d15ece0e2f53f6dc54bee82097ddf2

              SHA512

              994fcdc9466110944f1404da13d6e6c62f26eb61567b0fe8b142d9e2a15cc10dc88e3776e5b51f0f85805460867a40ca7d385ae48f92c5902a093f7692fceaf1

            • memory/2416-2-0x00000000002A0000-0x00000000002B3000-memory.dmp

              Filesize

              76KB

            • memory/2416-1-0x0000000003740000-0x0000000003840000-memory.dmp

              Filesize

              1024KB

            • memory/2416-4-0x0000000000400000-0x00000000036CD000-memory.dmp

              Filesize

              50.8MB

            • memory/2416-7-0x0000000000400000-0x00000000036CD000-memory.dmp

              Filesize

              50.8MB

            • memory/2664-15-0x0000000000400000-0x00000000036CD000-memory.dmp

              Filesize

              50.8MB

            • memory/2664-17-0x0000000000400000-0x00000000036CD000-memory.dmp

              Filesize

              50.8MB

            • memory/2664-9-0x0000000000290000-0x0000000000390000-memory.dmp

              Filesize

              1024KB

            • memory/2756-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2756-13-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2756-10-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2756-18-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2756-19-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2756-20-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB

            • memory/2756-21-0x00000000000D0000-0x00000000000E5000-memory.dmp

              Filesize

              84KB