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Analysis

  • max time kernel
    298s
  • max time network
    309s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    20/11/2023, 04:49

General

  • Target

    799c987ad840fbd563a1bd09f694958c07be362104b88171b423f2af4c395dc4.exe

  • Size

    276KB

  • MD5

    579bef931c82955a57587da5bbb15866

  • SHA1

    49524805286b19afc22f227531bf64146c88ae48

  • SHA256

    799c987ad840fbd563a1bd09f694958c07be362104b88171b423f2af4c395dc4

  • SHA512

    f21dff5d462696a067aab843a06dfb7b0cb3e1fa931693046089f33dcb9011e331bd83a99b5c5666df2d7ed59b7af5b2c02f4138cb1280a1b0d4733a0aa0ca65

  • SSDEEP

    3072:X6qeH/j3LXZp9I+LmqGm1+0C+7Fys1/mQqeZApUn2/LhRXQLOPf7ovbeB4:AH3f9I+aJmYEhys1/mdDp5/TQOPTM

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).

  • GoLang User-Agent 1 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • Modifies data under HKEY_USERS 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\799c987ad840fbd563a1bd09f694958c07be362104b88171b423f2af4c395dc4.exe
    "C:\Users\Admin\AppData\Local\Temp\799c987ad840fbd563a1bd09f694958c07be362104b88171b423f2af4c395dc4.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2104
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vxlrjgol\
      2⤵
        PID:3028
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zlxczfes.exe" C:\Windows\SysWOW64\vxlrjgol\
        2⤵
          PID:2716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vxlrjgol binPath= "C:\Windows\SysWOW64\vxlrjgol\zlxczfes.exe /d\"C:\Users\Admin\AppData\Local\Temp\799c987ad840fbd563a1bd09f694958c07be362104b88171b423f2af4c395dc4.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2880
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vxlrjgol "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2720
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vxlrjgol
          2⤵
          • Launches sc.exe
          PID:2708
        • 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:2824
      • C:\Windows\SysWOW64\vxlrjgol\zlxczfes.exe
        C:\Windows\SysWOW64\vxlrjgol\zlxczfes.exe /d"C:\Users\Admin\AppData\Local\Temp\799c987ad840fbd563a1bd09f694958c07be362104b88171b423f2af4c395dc4.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2668
        • 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:2560
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2440

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.8MB

        MD5

        166bb071b1f3d5c5395b9a7e771b466a

        SHA1

        227aa48790acd451572d2b59b6ed0d5ff5e2bcce

        SHA256

        3621ab882d4d8448143fc2354bff5bae58b3efabf1322c86f1f5dbba46db3486

        SHA512

        f9db85d052c0bb753b5881770b65e088aa5a58466007bda62389f551bd1e4e200afbf27a4393957d53cbbf589a8fe5034435afcb3eb5cab780939f0dcbbb9ff9

      • C:\Windows\SysWOW64\vxlrjgol\zlxczfes.exe

        Filesize

        10.8MB

        MD5

        166bb071b1f3d5c5395b9a7e771b466a

        SHA1

        227aa48790acd451572d2b59b6ed0d5ff5e2bcce

        SHA256

        3621ab882d4d8448143fc2354bff5bae58b3efabf1322c86f1f5dbba46db3486

        SHA512

        f9db85d052c0bb753b5881770b65e088aa5a58466007bda62389f551bd1e4e200afbf27a4393957d53cbbf589a8fe5034435afcb3eb5cab780939f0dcbbb9ff9

      • memory/2104-3-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2104-4-0x0000000000400000-0x00000000004F8000-memory.dmp

        Filesize

        992KB

      • memory/2104-1-0x0000000000620000-0x0000000000720000-memory.dmp

        Filesize

        1024KB

      • memory/2104-7-0x0000000000400000-0x00000000004F8000-memory.dmp

        Filesize

        992KB

      • memory/2440-76-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2440-75-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2440-74-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2440-73-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2440-72-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2440-71-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2440-63-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2440-61-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2560-38-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-45-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-26-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/2560-29-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-32-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-33-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-34-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-35-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-36-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-37-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-22-0x0000000001850000-0x0000000001A5F000-memory.dmp

        Filesize

        2.1MB

      • memory/2560-39-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-40-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-41-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-42-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-43-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-44-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-25-0x0000000001850000-0x0000000001A5F000-memory.dmp

        Filesize

        2.1MB

      • memory/2560-46-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-47-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-48-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/2560-49-0x0000000000170000-0x0000000000175000-memory.dmp

        Filesize

        20KB

      • memory/2560-52-0x0000000000170000-0x0000000000175000-memory.dmp

        Filesize

        20KB

      • memory/2560-53-0x0000000005470000-0x000000000587B000-memory.dmp

        Filesize

        4.0MB

      • memory/2560-56-0x0000000005470000-0x000000000587B000-memory.dmp

        Filesize

        4.0MB

      • memory/2560-57-0x00000000001C0000-0x00000000001C7000-memory.dmp

        Filesize

        28KB

      • memory/2560-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2560-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2560-79-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2560-14-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2560-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2560-9-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2668-10-0x0000000000630000-0x0000000000730000-memory.dmp

        Filesize

        1024KB

      • memory/2668-12-0x0000000000400000-0x00000000004F8000-memory.dmp

        Filesize

        992KB

      • memory/2668-15-0x0000000000400000-0x00000000004F8000-memory.dmp

        Filesize

        992KB