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Analysis

  • max time kernel
    146s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20230621-en
  • resource tags

    arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
  • submitted
    03/07/2023, 16:01

General

  • Target

    file.exe

  • Size

    260KB

  • MD5

    f01168e4b610509f528bca4d244fa0a1

  • SHA1

    b617e4328af65e81135b77da92d6829f4dbc305f

  • SHA256

    0d10d157a9b1346c1f5c737e4912ce3738facda1e74fdd0a4a1fb2c36a6374ec

  • SHA512

    8717fbc01e6a67dc4a8a66cffbf8892ab883446831483a7b97c6260dded02b06e3bf3dbf24cc740dee607130e0204c9681e4b274369ac111692550b16ba67d72

  • SSDEEP

    3072:N9ksIUovdgSsy7mfeYqLez+wkNAf875or0FUzI6JrWPbB6jM:Q2Ssy7m1qKz+w4/7+RWzE

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:1396
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oidogyxj\
      2⤵
        PID:904
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\knkduwqg.exe" C:\Windows\SysWOW64\oidogyxj\
        2⤵
          PID:1500
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create oidogyxj binPath= "C:\Windows\SysWOW64\oidogyxj\knkduwqg.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:648
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description oidogyxj "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1724
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start oidogyxj
          2⤵
          • Launches sc.exe
          PID:1556
        • 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:1680
      • C:\Windows\SysWOW64\oidogyxj\knkduwqg.exe
        C:\Windows\SysWOW64\oidogyxj\knkduwqg.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:280
        • 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:568

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        13.6MB

        MD5

        4ff391053545e4dd2077d43a40be7c49

        SHA1

        2a05b9ae7af9110d5be9abf39e87dfb0b374ec66

        SHA256

        c277f4df72f97a23379e2e15b3563cd003db137aab59f5b3f56c2b417733da79

        SHA512

        7e6665cf992620a14ff34bcf4c09f5830024274ae07abaf164ea59b545939f87b9009d341fb332b548031df3646007869a526c4bd2c12ffb6ff7a0e3236cccb3

      • C:\Windows\SysWOW64\oidogyxj\knkduwqg.exe

        Filesize

        13.6MB

        MD5

        4ff391053545e4dd2077d43a40be7c49

        SHA1

        2a05b9ae7af9110d5be9abf39e87dfb0b374ec66

        SHA256

        c277f4df72f97a23379e2e15b3563cd003db137aab59f5b3f56c2b417733da79

        SHA512

        7e6665cf992620a14ff34bcf4c09f5830024274ae07abaf164ea59b545939f87b9009d341fb332b548031df3646007869a526c4bd2c12ffb6ff7a0e3236cccb3

      • memory/280-66-0x0000000000400000-0x0000000001B44000-memory.dmp

        Filesize

        23.3MB

      • memory/364-83-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-61-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/364-63-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

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

        Filesize

        84KB

      • memory/364-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • 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/364-71-0x00000000018F0000-0x0000000001AFF000-memory.dmp

        Filesize

        2.1MB

      • memory/364-74-0x00000000018F0000-0x0000000001AFF000-memory.dmp

        Filesize

        2.1MB

      • memory/364-75-0x0000000000210000-0x0000000000216000-memory.dmp

        Filesize

        24KB

      • memory/364-78-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-81-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-82-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-84-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-85-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-88-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-87-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-86-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-106-0x0000000000480000-0x0000000000487000-memory.dmp

        Filesize

        28KB

      • memory/364-93-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-90-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-91-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-94-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-96-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-98-0x0000000000370000-0x0000000000375000-memory.dmp

        Filesize

        20KB

      • memory/364-101-0x0000000000370000-0x0000000000375000-memory.dmp

        Filesize

        20KB

      • memory/364-102-0x0000000005400000-0x000000000580B000-memory.dmp

        Filesize

        4.0MB

      • memory/364-97-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-95-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-92-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-89-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/364-105-0x0000000005400000-0x000000000580B000-memory.dmp

        Filesize

        4.0MB

      • memory/568-112-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/568-111-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/568-116-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/568-120-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/568-119-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/568-121-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/568-122-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/568-123-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/568-124-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1396-56-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/1396-60-0x0000000000400000-0x0000000001B44000-memory.dmp

        Filesize

        23.3MB