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Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/01/2025, 18:34

General

  • Target

    2025-01-26_6dd13a57c6a06a93be7ae34d9cb92a6a_mafia.exe

  • Size

    10.3MB

  • MD5

    6dd13a57c6a06a93be7ae34d9cb92a6a

  • SHA1

    4a7551506dcd411a6385e2a985ba4429de2f63ea

  • SHA256

    103f257a6c4a8617124389d69bc1ae7315e8c0d773548b1eed2d4a4044bdd2be

  • SHA512

    8dfcb3439993a08c21330a926ef161ff0a81f05879a81baad13bfb025c414f161d18590717277ae0c34fd4113caa66cc524589ee919a572936273ad0fa105cc9

  • SSDEEP

    49152:RqE0YKr3fYPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPn:RqtYc3

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.

  • Tofsee family
  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2025-01-26_6dd13a57c6a06a93be7ae34d9cb92a6a_mafia.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-01-26_6dd13a57c6a06a93be7ae34d9cb92a6a_mafia.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3412
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\upuxeddm\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4948
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\arnulkos.exe" C:\Windows\SysWOW64\upuxeddm\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4228
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create upuxeddm binPath= "C:\Windows\SysWOW64\upuxeddm\arnulkos.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-26_6dd13a57c6a06a93be7ae34d9cb92a6a_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2624
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description upuxeddm "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3756
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start upuxeddm
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1496
    • 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
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:2552
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3412 -s 668
      2⤵
      • Program crash
      PID:3216
  • C:\Windows\SysWOW64\upuxeddm\arnulkos.exe
    C:\Windows\SysWOW64\upuxeddm\arnulkos.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-26_6dd13a57c6a06a93be7ae34d9cb92a6a_mafia.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5064
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2340
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5064 -s 516
      2⤵
      • Program crash
      PID:4560
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 5064 -ip 5064
    1⤵
      PID:5084
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3412 -ip 3412
      1⤵
        PID:2024

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.4MB

        MD5

        cf2e3c0be26450cbab80b728d8789650

        SHA1

        58f4d81c6127d6da8dfde18fdfaa433aba54af12

        SHA256

        dc7c95788c1c469180356c18a99f3ad1b71f609eabbd51a85966f83f245c252b

        SHA512

        3f8222faa36a11ab4d0344cc475902d5a482dd58ef4b2922cf536dcc62c076a678fa6ffc34ffbc3b3215709032c790d19ca613b138b09a174756dce656cb974c

      • memory/2340-8-0x0000000000990000-0x00000000009A5000-memory.dmp

        Filesize

        84KB

      • memory/2340-14-0x0000000000990000-0x00000000009A5000-memory.dmp

        Filesize

        84KB

      • memory/2340-15-0x0000000000990000-0x00000000009A5000-memory.dmp

        Filesize

        84KB

      • memory/3412-1-0x0000000002EB0000-0x0000000002FB0000-memory.dmp

        Filesize

        1024KB

      • memory/3412-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/3412-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3412-13-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3412-12-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/3412-11-0x0000000000400000-0x0000000002DC3000-memory.dmp

        Filesize

        41.8MB

      • memory/5064-10-0x0000000000400000-0x0000000002DC3000-memory.dmp

        Filesize

        41.8MB