Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    09/09/2024, 16:49

General

  • Target

    c36fbe6dd8f9632176f3927fca2c2e674a5929d33e7d245f1053bf69ec2b11a9.exe

  • Size

    379KB

  • MD5

    95b628b19f244451d5f69a864e24b260

  • SHA1

    a478f681098713f959d89361c09c14d02552e6ed

  • SHA256

    c36fbe6dd8f9632176f3927fca2c2e674a5929d33e7d245f1053bf69ec2b11a9

  • SHA512

    f2755be22ecdb5aa22ac741fd4bb4d1f1fded762106dd04e6926771ba2ceb19414228fab882b609504ece92583084634ff10b1febdcecd26ac70ac40a1aa7caa

  • SSDEEP

    3072:V8XBk++uc5jv/MfYABOMHfa80LxDtamgthsGiOTBILGvmYX0ZSZn0YTwsu9f:mBknHMfYAB1aLLMhsdOdILGmM92f

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

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

  • Creates new service(s) 2 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
  • Drops file in System32 directory 2 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.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c36fbe6dd8f9632176f3927fca2c2e674a5929d33e7d245f1053bf69ec2b11a9.exe
    "C:\Users\Admin\AppData\Local\Temp\c36fbe6dd8f9632176f3927fca2c2e674a5929d33e7d245f1053bf69ec2b11a9.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1824
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wlbipqos\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1456
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mtadsgzj.exe" C:\Windows\SysWOW64\wlbipqos\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3640
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create wlbipqos binPath= "C:\Windows\SysWOW64\wlbipqos\mtadsgzj.exe /d\"C:\Users\Admin\AppData\Local\Temp\c36fbe6dd8f9632176f3927fca2c2e674a5929d33e7d245f1053bf69ec2b11a9.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:656
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description wlbipqos "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2016
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start wlbipqos
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3888
    • 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:1912
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1824 -s 680
      2⤵
      • Program crash
      PID:3612
  • C:\Windows\SysWOW64\wlbipqos\mtadsgzj.exe
    C:\Windows\SysWOW64\wlbipqos\mtadsgzj.exe /d"C:\Users\Admin\AppData\Local\Temp\c36fbe6dd8f9632176f3927fca2c2e674a5929d33e7d245f1053bf69ec2b11a9.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2916
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:3684
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2916 -s 544
      2⤵
      • Program crash
      PID:976
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1824 -ip 1824
    1⤵
      PID:1832
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2916 -ip 2916
      1⤵
        PID:3392

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.6MB

        MD5

        2f955c65998947d7e371f04758c78205

        SHA1

        b0f68208b2e8a2b200e484ce7b5a68dc9c93c262

        SHA256

        6ac263593e458659ec720fb564f5f40bef46d7e791a480962bb3c8335c9f6ac5

        SHA512

        a2cf0156aac3fac4c6fa8ca2f8ec30362ec6ca109602100444359bae61c589482b2df5de92cc9738159a2951a6379f796d27e0b38f5799ed67dcc2c110b71e8d

      • memory/1824-1-0x0000000002570000-0x0000000002670000-memory.dmp

        Filesize

        1024KB

      • memory/1824-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/1824-2-0x00000000042C0000-0x00000000042D3000-memory.dmp

        Filesize

        76KB

      • memory/1824-12-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/1824-11-0x00000000042C0000-0x00000000042D3000-memory.dmp

        Filesize

        76KB

      • memory/1824-8-0x0000000000400000-0x0000000002477000-memory.dmp

        Filesize

        32.5MB

      • memory/2916-13-0x0000000000400000-0x0000000002477000-memory.dmp

        Filesize

        32.5MB

      • memory/3684-48-0x0000000007400000-0x000000000780B000-memory.dmp

        Filesize

        4.0MB

      • memory/3684-40-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-15-0x0000000000310000-0x0000000000325000-memory.dmp

        Filesize

        84KB

      • memory/3684-17-0x0000000002400000-0x000000000260F000-memory.dmp

        Filesize

        2.1MB

      • memory/3684-21-0x0000000002710000-0x0000000002716000-memory.dmp

        Filesize

        24KB

      • memory/3684-24-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-20-0x0000000002400000-0x000000000260F000-memory.dmp

        Filesize

        2.1MB

      • memory/3684-36-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-47-0x00000000029F0000-0x00000000029F5000-memory.dmp

        Filesize

        20KB

      • memory/3684-52-0x0000000007950000-0x0000000007957000-memory.dmp

        Filesize

        28KB

      • memory/3684-9-0x0000000000310000-0x0000000000325000-memory.dmp

        Filesize

        84KB

      • memory/3684-44-0x00000000029F0000-0x00000000029F5000-memory.dmp

        Filesize

        20KB

      • memory/3684-43-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-42-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-41-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-14-0x0000000000310000-0x0000000000325000-memory.dmp

        Filesize

        84KB

      • memory/3684-39-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-38-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-37-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-35-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-34-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-33-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-32-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-51-0x0000000007400000-0x000000000780B000-memory.dmp

        Filesize

        4.0MB

      • memory/3684-31-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-30-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-29-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-28-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB

      • memory/3684-27-0x0000000002720000-0x0000000002730000-memory.dmp

        Filesize

        64KB