Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:19

General

  • Target

    8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe

  • Size

    203KB

  • MD5

    6b7204c0cb219b7d01999025ccd85fdc

  • SHA1

    1f57fbfdcf6d71d0d5a36602e1e83bc9dee3ac7a

  • SHA256

    8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40

  • SHA512

    68a19f84eb4d73394a2bb2b7629f9582e91b54713b19e71722ba5359636ce36d9aa9951af7b729d65752a7aff916ee91abd87f34c2e4aad43cebef777800742b

  • SSDEEP

    3072:eSf/dfuraZJXENc8uCXJiXK1K2LS1G2B+vioyUSdUuD5BBNcRrxOJ+cmH:eSf/MQ15t1TB+PSHexLco

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.

  • 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
  • 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).

  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe
    "C:\Users\Admin\AppData\Local\Temp\8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2344
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iyxanbmv\
      2⤵
        PID:1672
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tahkzngq.exe" C:\Windows\SysWOW64\iyxanbmv\
        2⤵
          PID:2892
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create iyxanbmv binPath= "C:\Windows\SysWOW64\iyxanbmv\tahkzngq.exe /d\"C:\Users\Admin\AppData\Local\Temp\8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2304
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description iyxanbmv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2564
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start iyxanbmv
          2⤵
          • Launches sc.exe
          PID:2636
        • 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:2448
      • C:\Windows\SysWOW64\iyxanbmv\tahkzngq.exe
        C:\Windows\SysWOW64\iyxanbmv\tahkzngq.exe /d"C:\Users\Admin\AppData\Local\Temp\8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2620
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2680

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Persistence

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Privilege Escalation

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Defense Evasion

      Impair Defenses

      2
      T1562

      Disable or Modify Tools

      1
      T1562.001

      Disable or Modify System Firewall

      1
      T1562.004

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\tahkzngq.exe
        Filesize

        12.6MB

        MD5

        b3ec935e7dd40aeb2c32ab6213ffc892

        SHA1

        21db99814d066e7ebe591a6bcb8263f96850293c

        SHA256

        25505269df9d71213cdd95daf434055c164f323cc6455a683e1e3c533206a54f

        SHA512

        4a2c63b2347d1bc8953b8b292b9bc0384ee117b6aecb03321276d073b1d16614c2f47b70f2c0f6da862280e4a7c5164fe2ee0d136df512b3c39b82cd959b74ef

      • memory/2344-4-0x0000000000400000-0x0000000000438000-memory.dmp
        Filesize

        224KB

      • memory/2344-2-0x00000000005D0000-0x00000000006D0000-memory.dmp
        Filesize

        1024KB

      • memory/2344-3-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2344-18-0x0000000000400000-0x0000000000438000-memory.dmp
        Filesize

        224KB

      • memory/2620-14-0x0000000000400000-0x0000000000438000-memory.dmp
        Filesize

        224KB

      • memory/2620-12-0x0000000000520000-0x0000000000620000-memory.dmp
        Filesize

        1024KB

      • memory/2680-34-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-36-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-8-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2680-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2680-19-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2680-20-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2680-22-0x0000000001920000-0x0000000001B2F000-memory.dmp
        Filesize

        2.1MB

      • memory/2680-26-0x00000000000C0000-0x00000000000C6000-memory.dmp
        Filesize

        24KB

      • memory/2680-25-0x0000000001920000-0x0000000001B2F000-memory.dmp
        Filesize

        2.1MB

      • memory/2680-29-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-33-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-32-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-35-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-11-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2680-37-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-39-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-38-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-17-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2680-44-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-43-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-46-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-45-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-48-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-47-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-49-0x0000000000450000-0x0000000000455000-memory.dmp
        Filesize

        20KB

      • memory/2680-42-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-41-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-40-0x0000000000240000-0x0000000000250000-memory.dmp
        Filesize

        64KB

      • memory/2680-52-0x0000000000450000-0x0000000000455000-memory.dmp
        Filesize

        20KB

      • memory/2680-53-0x0000000005840000-0x0000000005C4B000-memory.dmp
        Filesize

        4.0MB

      • memory/2680-56-0x0000000005840000-0x0000000005C4B000-memory.dmp
        Filesize

        4.0MB

      • memory/2680-57-0x0000000000460000-0x0000000000467000-memory.dmp
        Filesize

        28KB

      • memory/2680-61-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB