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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, 18:32

General

  • Target

    2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe

  • Size

    14.1MB

  • MD5

    59add1cca37057d8d2bf397f9a6c0da7

  • SHA1

    240a0a464b6184b25b6a3b46f506f65b5545d824

  • SHA256

    360f1feceab5a16cd0a3a2d955380d613aee482172bcadc1a700248fb62f39c9

  • SHA512

    3f03f09e004f1698b4e4691388c44a2c7c0bcecc711f0b4fa0bb8b11a2c8da284cda4053ccffcaa9e0891beed2463f2e246c5d5e4867e29eaab96aa15422b88c

  • SSDEEP

    24576:rEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZR:4fot

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_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4988
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gobdynwb\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3388
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yavbuhr.exe" C:\Windows\SysWOW64\gobdynwb\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2824
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create gobdynwb binPath= "C:\Windows\SysWOW64\gobdynwb\yavbuhr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4344
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description gobdynwb "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:320
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start gobdynwb
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4116
    • 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:3536
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4988 -s 676
      2⤵
      • Program crash
      PID:4804
  • C:\Windows\SysWOW64\gobdynwb\yavbuhr.exe
    C:\Windows\SysWOW64\gobdynwb\yavbuhr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3260
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:3248
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3260 -s 512
      2⤵
      • Program crash
      PID:3716
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4988 -ip 4988
    1⤵
      PID:3300
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3260 -ip 3260
      1⤵
        PID:4068

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.4MB

        MD5

        a65d99d502048386b184dfa71319407e

        SHA1

        c48f51aabdf2955e5c8577c1836ab206647ed4b2

        SHA256

        a80e1082ab7f82c3689fafa518a702bb9c18300bbbef3bd044964fcf3b063908

        SHA512

        2d9e3c8e092b3ad2d8b3387bc962ee57bdda5543bbf20dd6067fcd69c79d0ab4d0357ad07d9cc69ca0fc9f870d7afedacf3a2847e474f00bfde3d51c69ca2ad7

      • memory/3248-14-0x0000000000BA0000-0x0000000000BB5000-memory.dmp

        Filesize

        84KB

      • memory/3248-17-0x0000000000BA0000-0x0000000000BB5000-memory.dmp

        Filesize

        84KB

      • memory/3248-16-0x0000000000BA0000-0x0000000000BB5000-memory.dmp

        Filesize

        84KB

      • memory/3260-13-0x0000000000400000-0x000000000044E000-memory.dmp

        Filesize

        312KB

      • memory/3260-11-0x0000000000400000-0x000000000044E000-memory.dmp

        Filesize

        312KB

      • memory/3260-12-0x0000000000400000-0x000000000044E000-memory.dmp

        Filesize

        312KB

      • memory/3260-18-0x0000000000400000-0x000000000044E000-memory.dmp

        Filesize

        312KB

      • memory/4988-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4988-8-0x0000000000490000-0x00000000004A3000-memory.dmp

        Filesize

        76KB

      • memory/4988-1-0x00000000006B0000-0x00000000007B0000-memory.dmp

        Filesize

        1024KB

      • memory/4988-7-0x0000000000400000-0x000000000044E000-memory.dmp

        Filesize

        312KB

      • memory/4988-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4988-2-0x0000000000490000-0x00000000004A3000-memory.dmp

        Filesize

        76KB