Analysis

  • max time kernel
    144s
  • max time network
    129s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    26/03/2024, 17:25

General

  • Target

    dfb4e28eaefda8e7dd87cda8bc66d12c.exe

  • Size

    10.5MB

  • MD5

    dfb4e28eaefda8e7dd87cda8bc66d12c

  • SHA1

    01f793ffbddfedd0be3d9336431070985946aece

  • SHA256

    447be4372af7afa914f4cbeacbeb1e0c5a2df26e1730598f44e4ad0609399cd7

  • SHA512

    4996cc63e96be5ec785bb6df41c83898048005ceec75f701f439ebf82a744651575e86fd4c52c2c517c4c4c9e0c353eeaff0878a0db7ca4eae086444829e4454

  • SSDEEP

    24576:uj8tdiKEvdYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYw:6Kg

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 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\dfb4e28eaefda8e7dd87cda8bc66d12c.exe
    "C:\Users\Admin\AppData\Local\Temp\dfb4e28eaefda8e7dd87cda8bc66d12c.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2020
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sqjtlinn\
      2⤵
        PID:1152
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hwaeuhyy.exe" C:\Windows\SysWOW64\sqjtlinn\
        2⤵
          PID:2268
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create sqjtlinn binPath= "C:\Windows\SysWOW64\sqjtlinn\hwaeuhyy.exe /d\"C:\Users\Admin\AppData\Local\Temp\dfb4e28eaefda8e7dd87cda8bc66d12c.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2660
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description sqjtlinn "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2796
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start sqjtlinn
          2⤵
          • Launches sc.exe
          PID:2540
        • 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:2056
      • C:\Windows\SysWOW64\sqjtlinn\hwaeuhyy.exe
        C:\Windows\SysWOW64\sqjtlinn\hwaeuhyy.exe /d"C:\Users\Admin\AppData\Local\Temp\dfb4e28eaefda8e7dd87cda8bc66d12c.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2524
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          PID:2940

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        13.0MB

        MD5

        1dd0c78adbced433738d8f3092258da9

        SHA1

        f44d6ea34d86885ad791bd19dd05413582cd5cae

        SHA256

        b9ad79c65c50f6bdedbb0360de9b11b788692a3ff22df251d3a7a93e64cf49d8

        SHA512

        f7c8192b0bf84a8ecf1c20ba247ec67f31cc65c7330c80e6f4b230dd92648de5b8a4368f89d02eb8cbea58d9fcddc962664d3f8d53069700b8b61e0d997bae70

      • C:\Windows\SysWOW64\sqjtlinn\hwaeuhyy.exe

        Filesize

        5.9MB

        MD5

        2c4621426e0c64a8e0a66e3827037fd4

        SHA1

        98e9070a380abdeaaa649af2073aba248b82528b

        SHA256

        7201007943f6b82b561ac8c91dbb7d8a81573d3015d4ca492e14cb78a720b084

        SHA512

        449ffea02908ad50378b9227fa5aa448d0e8af46a1e1da3cc362230a29bf242d585cf1fc3364f64527f3f63ff21919c57f9bd6e92b358900057b2dfa00fe424b

      • memory/2020-1-0x00000000009A0000-0x0000000000AA0000-memory.dmp

        Filesize

        1024KB

      • memory/2020-2-0x0000000000230000-0x0000000000243000-memory.dmp

        Filesize

        76KB

      • memory/2020-4-0x0000000000400000-0x00000000008E9000-memory.dmp

        Filesize

        4.9MB

      • memory/2020-7-0x0000000000400000-0x00000000008E9000-memory.dmp

        Filesize

        4.9MB

      • memory/2020-8-0x0000000000230000-0x0000000000243000-memory.dmp

        Filesize

        76KB

      • memory/2524-11-0x0000000000400000-0x00000000008E9000-memory.dmp

        Filesize

        4.9MB

      • memory/2524-10-0x00000000002F0000-0x00000000003F0000-memory.dmp

        Filesize

        1024KB

      • memory/2524-18-0x0000000000400000-0x00000000008E9000-memory.dmp

        Filesize

        4.9MB

      • memory/2940-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2940-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2940-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2940-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2940-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2940-22-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB