Analysis

  • max time kernel
    150s
  • max time network
    161s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    01-05-2023 18:57

General

  • Target

    file.exe

  • Size

    303KB

  • MD5

    dd18a455e9d700d656ce6965cee1a068

  • SHA1

    bb23d970e98a6a6ec178fc6c9c82689b3e92ee7c

  • SHA256

    18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207

  • SHA512

    71dc5ce080f2f95f2b68bcd135cfbbb9d020e10f58972b4f90ac98a3794f7791857139d45f417d127182bb26caca996a94c95008f2fc0ccc8a3c1b16dd07b531

  • SSDEEP

    3072:duhpDHOnUv1WfCBuL4IdkVDJNhA+GHRIBiSp5z5DT4zknffhd+OH:shpDH9vEfQQrdkB7Fi05ykn3v+y

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:1240
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gsyhdrdv\
      2⤵
        PID:1940
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ixpwbzew.exe" C:\Windows\SysWOW64\gsyhdrdv\
        2⤵
          PID:1444
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gsyhdrdv binPath= "C:\Windows\SysWOW64\gsyhdrdv\ixpwbzew.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1148
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description gsyhdrdv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:820
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start gsyhdrdv
          2⤵
          • Launches sc.exe
          PID:872
        • 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:1892
      • C:\Windows\SysWOW64\gsyhdrdv\ixpwbzew.exe
        C:\Windows\SysWOW64\gsyhdrdv\ixpwbzew.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:364
        • 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:1788
          • 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:1856

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        11.8MB

        MD5

        c26905a1aa0bbf43d23217371234314e

        SHA1

        b8ebef3c9f16ed8ee0e989763baa6cfb656ea89a

        SHA256

        48fd6244f0adc939736e014972c135486e784e3eb225c04ada8dcddddd3bfa32

        SHA512

        cf6f628282e27faae59f2a373a1adb2941c763498531f7f287ad7403820116ed08824210d10af3e408cc185e812e0f7a7fcd7109b392cbc317a1bb9c69095dff

      • C:\Windows\SysWOW64\gsyhdrdv\ixpwbzew.exe

        Filesize

        11.8MB

        MD5

        c26905a1aa0bbf43d23217371234314e

        SHA1

        b8ebef3c9f16ed8ee0e989763baa6cfb656ea89a

        SHA256

        48fd6244f0adc939736e014972c135486e784e3eb225c04ada8dcddddd3bfa32

        SHA512

        cf6f628282e27faae59f2a373a1adb2941c763498531f7f287ad7403820116ed08824210d10af3e408cc185e812e0f7a7fcd7109b392cbc317a1bb9c69095dff

      • memory/364-67-0x0000000000400000-0x0000000000A5C000-memory.dmp

        Filesize

        6.4MB

      • memory/1240-57-0x0000000000400000-0x0000000000A5C000-memory.dmp

        Filesize

        6.4MB

      • memory/1240-59-0x0000000000400000-0x0000000000A5C000-memory.dmp

        Filesize

        6.4MB

      • memory/1240-56-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/1788-90-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-93-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-68-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1788-63-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1788-69-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1788-70-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1788-72-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1788-73-0x0000000001930000-0x0000000001B3F000-memory.dmp

        Filesize

        2.1MB

      • memory/1788-76-0x0000000001930000-0x0000000001B3F000-memory.dmp

        Filesize

        2.1MB

      • memory/1788-77-0x0000000000190000-0x0000000000196000-memory.dmp

        Filesize

        24KB

      • memory/1788-80-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-83-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-84-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-85-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-86-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-87-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-88-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-89-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-62-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1788-91-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-92-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-64-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1788-94-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-95-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-96-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-97-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-98-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-99-0x00000000001A0000-0x00000000001B0000-memory.dmp

        Filesize

        64KB

      • memory/1788-100-0x00000000001B0000-0x00000000001B5000-memory.dmp

        Filesize

        20KB

      • memory/1788-103-0x00000000001B0000-0x00000000001B5000-memory.dmp

        Filesize

        20KB

      • memory/1788-104-0x0000000005520000-0x000000000592B000-memory.dmp

        Filesize

        4.0MB

      • memory/1788-107-0x0000000005520000-0x000000000592B000-memory.dmp

        Filesize

        4.0MB

      • memory/1788-108-0x00000000001D0000-0x00000000001D7000-memory.dmp

        Filesize

        28KB

      • memory/1856-112-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1856-113-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1856-117-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1856-120-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1856-121-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1856-122-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1856-123-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1856-124-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1856-125-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB