Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:18

General

  • Target

    c9ba75c3c2b17dd64211ae2d9859ced46f797f4f25d867c63c813462a857b524.exe

  • Size

    203KB

  • MD5

    90d047019c018e2188352f9aeee97192

  • SHA1

    e0d7eee14e19ddb119760d4e15e387f285d82076

  • SHA256

    c9ba75c3c2b17dd64211ae2d9859ced46f797f4f25d867c63c813462a857b524

  • SHA512

    4aa2fa4f364a398cb763cbd317ea91dbac17e9e5ed44e5ebe09ba16e62cedb588d98ad807adb84127b00c757bcfef31f229aed5294a71ce682ef494da558b5a7

  • SSDEEP

    3072:DkIfnM3Jq/AmlEkJiAj1K/2sv1p6Ti/ZVqJnctmLoQCCRLQ+cmk:DkIzXlEh5VqKtm8CXcL

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\c9ba75c3c2b17dd64211ae2d9859ced46f797f4f25d867c63c813462a857b524.exe
    "C:\Users\Admin\AppData\Local\Temp\c9ba75c3c2b17dd64211ae2d9859ced46f797f4f25d867c63c813462a857b524.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2328
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hjfnqatz\
      2⤵
        PID:2600
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qcotqwvj.exe" C:\Windows\SysWOW64\hjfnqatz\
        2⤵
          PID:3068
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hjfnqatz binPath= "C:\Windows\SysWOW64\hjfnqatz\qcotqwvj.exe /d\"C:\Users\Admin\AppData\Local\Temp\c9ba75c3c2b17dd64211ae2d9859ced46f797f4f25d867c63c813462a857b524.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2628
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hjfnqatz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2540
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hjfnqatz
          2⤵
          • Launches sc.exe
          PID:2712
        • 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:2428
      • C:\Windows\SysWOW64\hjfnqatz\qcotqwvj.exe
        C:\Windows\SysWOW64\hjfnqatz\qcotqwvj.exe /d"C:\Users\Admin\AppData\Local\Temp\c9ba75c3c2b17dd64211ae2d9859ced46f797f4f25d867c63c813462a857b524.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1968
        • 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:112

      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\qcotqwvj.exe
        Filesize

        10.4MB

        MD5

        2cccb770e216b4baf3b4bf2ecb797b08

        SHA1

        f4bc47eaa8c9167768d49c2b4a383e3b96902f0c

        SHA256

        a30ca0b5ea446733367fc28b6de92dbad628f1088d223cb7495af0bb6d11153b

        SHA512

        b728798b692c3639d1f88f36f73552035bb037a88b36af059490b168882e5595771ea73b3ebea7bff8b70086a61654ac39f574a18bb152c276070f7df81c86b7

      • memory/112-44-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-42-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-61-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/112-56-0x0000000005A40000-0x0000000005E4B000-memory.dmp
        Filesize

        4.0MB

      • memory/112-57-0x0000000000160000-0x0000000000167000-memory.dmp
        Filesize

        28KB

      • memory/112-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/112-40-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-8-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/112-32-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-17-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/112-33-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-19-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/112-20-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/112-22-0x0000000001A70000-0x0000000001C7F000-memory.dmp
        Filesize

        2.1MB

      • memory/112-25-0x0000000001A70000-0x0000000001C7F000-memory.dmp
        Filesize

        2.1MB

      • memory/112-26-0x0000000000110000-0x0000000000116000-memory.dmp
        Filesize

        24KB

      • memory/112-29-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-49-0x0000000000150000-0x0000000000155000-memory.dmp
        Filesize

        20KB

      • memory/112-13-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/112-34-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-36-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-48-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-47-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-46-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-45-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-53-0x0000000005A40000-0x0000000005E4B000-memory.dmp
        Filesize

        4.0MB

      • memory/112-52-0x0000000000150000-0x0000000000155000-memory.dmp
        Filesize

        20KB

      • memory/112-43-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-35-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-41-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-39-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-38-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/112-37-0x0000000000140000-0x0000000000150000-memory.dmp
        Filesize

        64KB

      • memory/1968-15-0x0000000000400000-0x0000000000438000-memory.dmp
        Filesize

        224KB

      • memory/1968-11-0x0000000000400000-0x0000000000438000-memory.dmp
        Filesize

        224KB

      • memory/1968-9-0x0000000000570000-0x0000000000670000-memory.dmp
        Filesize

        1024KB

      • memory/2328-4-0x0000000000400000-0x0000000000438000-memory.dmp
        Filesize

        224KB

      • memory/2328-3-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2328-18-0x0000000000400000-0x0000000000438000-memory.dmp
        Filesize

        224KB

      • memory/2328-1-0x0000000000560000-0x0000000000660000-memory.dmp
        Filesize

        1024KB