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Analysis

  • max time kernel
    145s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    18/12/2022, 07:39

General

  • Target

    file.exe

  • Size

    214KB

  • MD5

    895e22225e211ab309f7e14c08024498

  • SHA1

    3a343faca4fcf4bf27322c7109fbba19a5f390c2

  • SHA256

    9f3615bc4f0403c7c3bd0b6ab6128cfe871cb228284922bbef62c5bda8e6caf0

  • SHA512

    beeca24d02de7cbe4db7146c650c42b59ac1a5824d7cad701a87c94845269d623eab78ca71a036fb7192a20f7979a0fc67c4b6beced8d2c56b78cf4d04fd8c26

  • SSDEEP

    3072:fyf2iATLGMZwR9vACR3vUbKQ9VaNnXiyqgjw8/g3xotY33mG3ERWR3LV:qf2vTLGM8YafULaJyyjFg3CtGnU0VB

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:1580
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sydyholo\
      2⤵
        PID:892
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gmetyri.exe" C:\Windows\SysWOW64\sydyholo\
        2⤵
          PID:268
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create sydyholo binPath= "C:\Windows\SysWOW64\sydyholo\gmetyri.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1872
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description sydyholo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1688
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start sydyholo
          2⤵
          • Launches sc.exe
          PID:1896
        • 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:368
      • C:\Windows\SysWOW64\sydyholo\gmetyri.exe
        C:\Windows\SysWOW64\sydyholo\gmetyri.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:568
        • 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:1888
          • 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:892

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        13.4MB

        MD5

        352d6f03dd918d157307f0f1d086f9ed

        SHA1

        75db8a13bb995f1f482d5095f78e91363e630e0f

        SHA256

        62f2e9a3b77909d99a44fc3f22a56967ad0dba1c88572201428ce53ed9fe3b30

        SHA512

        b27b3a6fba0941b91ced02936b68c4ca73fec4b1c1ddf3a7c5696f30d62b5d42fa10ace39f5b90026c7c2ce4f68110a800dbe0568bba01e25ec4c7a2b8371186

      • C:\Windows\SysWOW64\sydyholo\gmetyri.exe

        Filesize

        13.4MB

        MD5

        352d6f03dd918d157307f0f1d086f9ed

        SHA1

        75db8a13bb995f1f482d5095f78e91363e630e0f

        SHA256

        62f2e9a3b77909d99a44fc3f22a56967ad0dba1c88572201428ce53ed9fe3b30

        SHA512

        b27b3a6fba0941b91ced02936b68c4ca73fec4b1c1ddf3a7c5696f30d62b5d42fa10ace39f5b90026c7c2ce4f68110a800dbe0568bba01e25ec4c7a2b8371186

      • memory/568-76-0x0000000000538000-0x0000000000549000-memory.dmp

        Filesize

        68KB

      • memory/568-66-0x0000000000538000-0x0000000000549000-memory.dmp

        Filesize

        68KB

      • memory/568-78-0x0000000000400000-0x000000000045F000-memory.dmp

        Filesize

        380KB

      • memory/892-103-0x00000000002D0000-0x00000000003C1000-memory.dmp

        Filesize

        964KB

      • memory/892-101-0x00000000002D0000-0x00000000003C1000-memory.dmp

        Filesize

        964KB

      • memory/1580-57-0x00000000004F8000-0x0000000000509000-memory.dmp

        Filesize

        68KB

      • memory/1580-58-0x00000000002B0000-0x00000000002C3000-memory.dmp

        Filesize

        76KB

      • memory/1580-59-0x0000000000400000-0x000000000045F000-memory.dmp

        Filesize

        380KB

      • memory/1580-68-0x00000000004F8000-0x0000000000509000-memory.dmp

        Filesize

        68KB

      • memory/1580-69-0x0000000000400000-0x000000000045F000-memory.dmp

        Filesize

        380KB

      • memory/1580-54-0x00000000004F8000-0x0000000000509000-memory.dmp

        Filesize

        68KB

      • memory/1580-55-0x00000000757E1000-0x00000000757E3000-memory.dmp

        Filesize

        8KB

      • memory/1888-74-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1888-81-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1888-82-0x0000000001980000-0x0000000001B8F000-memory.dmp

        Filesize

        2.1MB

      • memory/1888-85-0x0000000000210000-0x0000000000216000-memory.dmp

        Filesize

        24KB

      • memory/1888-88-0x0000000000360000-0x0000000000370000-memory.dmp

        Filesize

        64KB

      • memory/1888-91-0x0000000000370000-0x0000000000375000-memory.dmp

        Filesize

        20KB

      • memory/1888-94-0x00000000054C0000-0x00000000058CB000-memory.dmp

        Filesize

        4.0MB

      • memory/1888-97-0x0000000000430000-0x0000000000437000-memory.dmp

        Filesize

        28KB

      • memory/1888-100-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1888-72-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB