Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20220718-en
  • resource tags

    arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system
  • submitted
    21-07-2022 19:36

General

  • Target

    e9da6f7d09227a19403a349a2252d2ed.exe

  • Size

    293KB

  • MD5

    e9da6f7d09227a19403a349a2252d2ed

  • SHA1

    fa94b24fc9a1357c3cf3c1c0ebac3ff1e6da8e81

  • SHA256

    e64afadba25eededfb3259f10671cf5551e53341e13702489a7c334fcf6514b0

  • SHA512

    501583258564f6f5ee722d6503503a4f56ec46ebd571e8ae8d671fb11462e0c02ff6c3bfd85e6ff709dc0f6d7d1c6d0aa89165c187d8e889efc2a41d2df92a27

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\e9da6f7d09227a19403a349a2252d2ed.exe
    "C:\Users\Admin\AppData\Local\Temp\e9da6f7d09227a19403a349a2252d2ed.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1044
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\flttfqps\
      2⤵
        PID:2032
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\emjagklw.exe" C:\Windows\SysWOW64\flttfqps\
        2⤵
          PID:984
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create flttfqps binPath= "C:\Windows\SysWOW64\flttfqps\emjagklw.exe /d\"C:\Users\Admin\AppData\Local\Temp\e9da6f7d09227a19403a349a2252d2ed.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1528
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description flttfqps "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1284
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start flttfqps
          2⤵
          • Launches sc.exe
          PID:1280
        • 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:1692
      • C:\Windows\SysWOW64\flttfqps\emjagklw.exe
        C:\Windows\SysWOW64\flttfqps\emjagklw.exe /d"C:\Users\Admin\AppData\Local\Temp\e9da6f7d09227a19403a349a2252d2ed.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:268
        • 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:1764
          • 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:692

      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\emjagklw.exe
        Filesize

        10.4MB

        MD5

        cc20e6bb305af4c30c150f16679ecae7

        SHA1

        ff51ff8c24fbbaac234aa13cc2d8f9ee8e8175e0

        SHA256

        f366ef73849a8a8b3fc9a6b194fc42a5cb3d03f816bf84b6d1268c1abcd2df00

        SHA512

        12ca17cac31164928f2effd4b3ebdfa7bcf9c4b957656e25d65eba3b0fe82bd68f47a799e3fcdd7da7f91a5cef898d69bf9c79f3947ee548db301a82d9435123

      • C:\Windows\SysWOW64\flttfqps\emjagklw.exe
        Filesize

        10.4MB

        MD5

        cc20e6bb305af4c30c150f16679ecae7

        SHA1

        ff51ff8c24fbbaac234aa13cc2d8f9ee8e8175e0

        SHA256

        f366ef73849a8a8b3fc9a6b194fc42a5cb3d03f816bf84b6d1268c1abcd2df00

        SHA512

        12ca17cac31164928f2effd4b3ebdfa7bcf9c4b957656e25d65eba3b0fe82bd68f47a799e3fcdd7da7f91a5cef898d69bf9c79f3947ee548db301a82d9435123

      • memory/268-77-0x0000000000400000-0x0000000000454000-memory.dmp
        Filesize

        336KB

      • memory/268-76-0x00000000005AE000-0x00000000005BE000-memory.dmp
        Filesize

        64KB

      • memory/692-94-0x000000000020259C-mapping.dmp
      • memory/692-89-0x0000000000170000-0x0000000000261000-memory.dmp
        Filesize

        964KB

      • memory/692-87-0x0000000000170000-0x0000000000261000-memory.dmp
        Filesize

        964KB

      • memory/984-59-0x0000000000000000-mapping.dmp
      • memory/1044-54-0x0000000075211000-0x0000000075213000-memory.dmp
        Filesize

        8KB

      • memory/1044-57-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1044-67-0x000000000060E000-0x000000000061E000-memory.dmp
        Filesize

        64KB

      • memory/1044-58-0x0000000000400000-0x0000000000454000-memory.dmp
        Filesize

        336KB

      • memory/1044-68-0x0000000000400000-0x0000000000454000-memory.dmp
        Filesize

        336KB

      • memory/1044-56-0x000000000060E000-0x000000000061E000-memory.dmp
        Filesize

        64KB

      • memory/1280-63-0x0000000000000000-mapping.dmp
      • memory/1284-62-0x0000000000000000-mapping.dmp
      • memory/1528-61-0x0000000000000000-mapping.dmp
      • memory/1692-66-0x0000000000000000-mapping.dmp
      • memory/1764-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1764-71-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1764-79-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1764-80-0x00000000020C0000-0x00000000022CF000-memory.dmp
        Filesize

        2.1MB

      • memory/1764-83-0x0000000000110000-0x0000000000116000-memory.dmp
        Filesize

        24KB

      • memory/1764-86-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1764-72-0x0000000000089A6B-mapping.dmp
      • memory/2032-55-0x0000000000000000-mapping.dmp