Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    08/10/2023, 20:30

General

  • Target

    file.exe

  • Size

    277KB

  • MD5

    fa1e97c7f20bf700a76427c1c6dd6970

  • SHA1

    1f6522235758eebaaf186be025246f967617ffb6

  • SHA256

    85b7b6cb61f1a5827c08243abd55022058e1dab967917ff39975dbdc0d93a542

  • SHA512

    22510b5ac557a347772815f36f1968340dd216f2670bb3d56dd30501ff4db1b97407d2a77b71b42a42b616c0a5b3f998a76308d6c1e3d3e91c0a46e073b72168

  • SSDEEP

    3072:Y0+mbRe4h3drmLf+xo52RM0W+xzWAip7eSzFhObhytiQYTQ8J/aT:2ueg3drsyo58M10WAipKSzFhOFkF

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
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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:3012
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\igaylut\
      2⤵
        PID:2084
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tadyxrrl.exe" C:\Windows\SysWOW64\igaylut\
        2⤵
          PID:2292
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create igaylut binPath= "C:\Windows\SysWOW64\igaylut\tadyxrrl.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1088
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description igaylut "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2728
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start igaylut
          2⤵
          • Launches sc.exe
          PID:2900
        • 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:2444
      • C:\Windows\SysWOW64\igaylut\tadyxrrl.exe
        C:\Windows\SysWOW64\igaylut\tadyxrrl.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2692
        • 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:2528
          • 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:596

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        14.8MB

        MD5

        f2d4cb516207c5db692a517dbffb99a4

        SHA1

        2fcecdc8a44901d73a728ea3fd382306ada9ad9c

        SHA256

        f8692ed81d82d0a6dcb3898fae13923f82a2622ec9e3b984dcab1103df0eafd6

        SHA512

        91e846585b9758a29ee6536c16164dd99688af0d5122ec5263da92abe4048532b20f6e6a2ca08301df9113ac69a950e871adbd8f6e0e020dd2d17b78dd9eac72

      • C:\Windows\SysWOW64\igaylut\tadyxrrl.exe

        Filesize

        14.8MB

        MD5

        f2d4cb516207c5db692a517dbffb99a4

        SHA1

        2fcecdc8a44901d73a728ea3fd382306ada9ad9c

        SHA256

        f8692ed81d82d0a6dcb3898fae13923f82a2622ec9e3b984dcab1103df0eafd6

        SHA512

        91e846585b9758a29ee6536c16164dd99688af0d5122ec5263da92abe4048532b20f6e6a2ca08301df9113ac69a950e871adbd8f6e0e020dd2d17b78dd9eac72

      • memory/596-63-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/596-78-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/596-77-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/596-76-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/596-74-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/596-75-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/596-73-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/596-65-0x0000000000230000-0x0000000000321000-memory.dmp

        Filesize

        964KB

      • memory/2528-50-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2528-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2528-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2528-23-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2528-24-0x0000000001A40000-0x0000000001C4F000-memory.dmp

        Filesize

        2.1MB

      • memory/2528-27-0x0000000001A40000-0x0000000001C4F000-memory.dmp

        Filesize

        2.1MB

      • memory/2528-28-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/2528-31-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2528-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-47-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-48-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-49-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2528-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2528-54-0x00000000000C0000-0x00000000000C5000-memory.dmp

        Filesize

        20KB

      • memory/2528-51-0x00000000000C0000-0x00000000000C5000-memory.dmp

        Filesize

        20KB

      • memory/2528-55-0x0000000005460000-0x000000000586B000-memory.dmp

        Filesize

        4.0MB

      • memory/2528-59-0x00000000000D0000-0x00000000000D7000-memory.dmp

        Filesize

        28KB

      • memory/2528-58-0x0000000005460000-0x000000000586B000-memory.dmp

        Filesize

        4.0MB

      • memory/2692-11-0x0000000000400000-0x0000000002282000-memory.dmp

        Filesize

        30.5MB

      • memory/2692-16-0x0000000000400000-0x0000000002282000-memory.dmp

        Filesize

        30.5MB

      • memory/2692-10-0x0000000000250000-0x0000000000350000-memory.dmp

        Filesize

        1024KB

      • memory/3012-1-0x0000000002450000-0x0000000002550000-memory.dmp

        Filesize

        1024KB

      • memory/3012-7-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/3012-6-0x0000000000400000-0x0000000002282000-memory.dmp

        Filesize

        30.5MB

      • memory/3012-4-0x0000000000400000-0x0000000002282000-memory.dmp

        Filesize

        30.5MB

      • memory/3012-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB