Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    06-02-2023 17:00

General

  • Target

    file.exe

  • Size

    321KB

  • MD5

    2a6d0dc80d852b76efe1488a0c4a38a6

  • SHA1

    5d22dca827854c071ac3387090d912648541c470

  • SHA256

    b2d8e0f8c89c4170394d3485ccab572e85704d7596e15f6cff784bf91ddeac1b

  • SHA512

    2e79b6c927582ddf3fb8a7e5b01a58177eb8f6732f2f16695b889ab557234687db9781f5d7f506937312c9466152b4794c1262578180fd53cdb14bb663a1ac21

  • SSDEEP

    3072:uB0fS/L4QgpR60YNPml6u0sYcRvIUX82QMycCKEuQjiMTE53516ag75:iRLrgS0YglyZ29ycCKEuQj9C516aM5

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
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 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:2040
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wynncxbo\
      2⤵
        PID:1628
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sliqhaur.exe" C:\Windows\SysWOW64\wynncxbo\
        2⤵
          PID:1380
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wynncxbo binPath= "C:\Windows\SysWOW64\wynncxbo\sliqhaur.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1612
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description wynncxbo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1444
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start wynncxbo
          2⤵
          • Launches sc.exe
          PID:1492
        • 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:576
      • C:\Windows\SysWOW64\wynncxbo\sliqhaur.exe
        C:\Windows\SysWOW64\wynncxbo\sliqhaur.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1408
        • 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:1908
          • 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:1472

      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\sliqhaur.exe
        Filesize

        11.3MB

        MD5

        26b1c5ed23b2dc296d7337d2308bc469

        SHA1

        d2865b82c88d8124f679bcc0750bccc70d74b5f2

        SHA256

        3ed9c7bce79cb1b1eb509dbffe41c5f4310ed7d7c96c772cf34263545375ca91

        SHA512

        735edec77dac51e722eb61372a3ee3f41c0a419246d62d7f6c794f785795f37477266c9a29ed0e34067a19f4484ff53a1bbb5f674a89c05b7b0de95f2b5abe90

      • C:\Windows\SysWOW64\wynncxbo\sliqhaur.exe
        Filesize

        11.3MB

        MD5

        26b1c5ed23b2dc296d7337d2308bc469

        SHA1

        d2865b82c88d8124f679bcc0750bccc70d74b5f2

        SHA256

        3ed9c7bce79cb1b1eb509dbffe41c5f4310ed7d7c96c772cf34263545375ca91

        SHA512

        735edec77dac51e722eb61372a3ee3f41c0a419246d62d7f6c794f785795f37477266c9a29ed0e34067a19f4484ff53a1bbb5f674a89c05b7b0de95f2b5abe90

      • memory/576-65-0x0000000000000000-mapping.dmp
      • memory/1380-59-0x0000000000000000-mapping.dmp
      • memory/1408-76-0x0000000000400000-0x000000000046C000-memory.dmp
        Filesize

        432KB

      • memory/1408-75-0x000000000064C000-0x0000000000661000-memory.dmp
        Filesize

        84KB

      • memory/1444-62-0x0000000000000000-mapping.dmp
      • memory/1472-101-0x0000000000110000-0x0000000000201000-memory.dmp
        Filesize

        964KB

      • memory/1472-99-0x0000000000110000-0x0000000000201000-memory.dmp
        Filesize

        964KB

      • memory/1472-106-0x00000000001A259C-mapping.dmp
      • memory/1492-63-0x0000000000000000-mapping.dmp
      • memory/1612-61-0x0000000000000000-mapping.dmp
      • memory/1628-55-0x0000000000000000-mapping.dmp
      • memory/1908-72-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1908-98-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1908-70-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1908-73-0x0000000000089A6B-mapping.dmp
      • memory/1908-95-0x00000000003E0000-0x00000000003E7000-memory.dmp
        Filesize

        28KB

      • memory/1908-92-0x0000000005920000-0x0000000005D2B000-memory.dmp
        Filesize

        4.0MB

      • memory/1908-79-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1908-80-0x0000000001A70000-0x0000000001C7F000-memory.dmp
        Filesize

        2.1MB

      • memory/1908-83-0x00000000000A0000-0x00000000000A6000-memory.dmp
        Filesize

        24KB

      • memory/1908-86-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1908-89-0x0000000000290000-0x0000000000295000-memory.dmp
        Filesize

        20KB

      • memory/2040-66-0x000000000065C000-0x0000000000671000-memory.dmp
        Filesize

        84KB

      • memory/2040-67-0x0000000000400000-0x000000000046C000-memory.dmp
        Filesize

        432KB

      • memory/2040-54-0x0000000076041000-0x0000000076043000-memory.dmp
        Filesize

        8KB

      • memory/2040-58-0x0000000000400000-0x000000000046C000-memory.dmp
        Filesize

        432KB

      • memory/2040-56-0x000000000065C000-0x0000000000671000-memory.dmp
        Filesize

        84KB

      • memory/2040-57-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB