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Analysis

  • max time kernel
    146s
  • max time network
    157s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    03/09/2024, 16:58

General

  • Target

    qkkcfptf.exe

  • Size

    11.6MB

  • MD5

    fed6d9f141d4ac6b3388a2c90722bd62

  • SHA1

    3480f699c94d4a520c8d92dfd2f6c84d5bd9668b

  • SHA256

    b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf

  • SHA512

    f678216084e177bc51879d697f6e4201449874ed1c6f4c41fc1cb62aecf8ed5c3ab17784c1d30c481ee99c727fe0a29cd2854bdcaf554b3da425d59b5e957719

  • SSDEEP

    6144:rc6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:r1OZDisvwdaxO0PuG1R4CWs

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\qkkcfptf.exe
    "C:\Users\Admin\AppData\Local\Temp\qkkcfptf.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3360
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xqjatuwr\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:344
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mcyniayg.exe" C:\Windows\SysWOW64\xqjatuwr\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2700
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create xqjatuwr binPath= "C:\Windows\SysWOW64\xqjatuwr\mcyniayg.exe /d\"C:\Users\Admin\AppData\Local\Temp\qkkcfptf.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3232
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description xqjatuwr "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4868
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start xqjatuwr
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3532
    • 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:3108
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3360 -s 1100
      2⤵
      • Program crash
      PID:1476
  • C:\Windows\SysWOW64\xqjatuwr\mcyniayg.exe
    C:\Windows\SysWOW64\xqjatuwr\mcyniayg.exe /d"C:\Users\Admin\AppData\Local\Temp\qkkcfptf.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1912
    • 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:944
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1912 -s 472
      2⤵
      • Program crash
      PID:3568
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3360 -ip 3360
    1⤵
      PID:3800
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 1912 -ip 1912
      1⤵
        PID:780

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        14.2MB

        MD5

        fc8d105ba389117dd83d0f7fd70d1b4b

        SHA1

        60360ff539a7e3f6303e26e52c84e66b513065a6

        SHA256

        ee269ace847cacc1f380787857341ec7d5d90c4f9c63db85922f70236081685a

        SHA512

        6710f43cc35127aa1b8cd1a696eb5d93a712a5d5eb83a7048cd071d799766305ee8c7abb5003c4eeef403eee30f88d2c719614588e774ac32b981476b40d0f49

      • memory/944-37-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-45-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-24-0x0000000002130000-0x0000000002136000-memory.dmp

        Filesize

        24KB

      • memory/944-21-0x0000000002A00000-0x0000000002C0F000-memory.dmp

        Filesize

        2.1MB

      • memory/944-23-0x0000000002A00000-0x0000000002C0F000-memory.dmp

        Filesize

        2.1MB

      • memory/944-10-0x0000000000CC0000-0x0000000000CD5000-memory.dmp

        Filesize

        84KB

      • memory/944-27-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-30-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-31-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-44-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-17-0x0000000000CC0000-0x0000000000CD5000-memory.dmp

        Filesize

        84KB

      • memory/944-18-0x0000000000CC0000-0x0000000000CD5000-memory.dmp

        Filesize

        84KB

      • memory/944-38-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-50-0x00000000021D0000-0x00000000021D5000-memory.dmp

        Filesize

        20KB

      • memory/944-51-0x0000000007980000-0x0000000007D8B000-memory.dmp

        Filesize

        4.0MB

      • memory/944-55-0x00000000021E0000-0x00000000021E7000-memory.dmp

        Filesize

        28KB

      • memory/944-54-0x0000000007980000-0x0000000007D8B000-memory.dmp

        Filesize

        4.0MB

      • memory/944-47-0x00000000021D0000-0x00000000021D5000-memory.dmp

        Filesize

        20KB

      • memory/944-32-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-46-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-33-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-43-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-42-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-41-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-40-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-39-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-35-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-34-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/944-36-0x0000000002140000-0x0000000002150000-memory.dmp

        Filesize

        64KB

      • memory/1912-12-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/1912-9-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/1912-8-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/3360-1-0x0000000000810000-0x0000000000910000-memory.dmp

        Filesize

        1024KB

      • memory/3360-14-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/3360-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3360-15-0x0000000002440000-0x0000000002453000-memory.dmp

        Filesize

        76KB

      • memory/3360-16-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3360-2-0x0000000002440000-0x0000000002453000-memory.dmp

        Filesize

        76KB