Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:19

General

  • Target

    7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe

  • Size

    229KB

  • MD5

    ddb3205a92ff18ae17b3f9f93c7b197c

  • SHA1

    b77c666a2d7b1f63ba08316f9a221be6ac1f786a

  • SHA256

    7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8

  • SHA512

    db659ead4fd2ed186f221adf5bb9ab5b686253454eeb307ba247a99d8026c009d72ed11473d4622146c7b6cf59f445ad3b020ac3394d3f61af5bfd385b43c334

  • SSDEEP

    3072:lnUQviqZALXadUs0vEJimn1K29YbqYZgpLneYDR89fJ5j3UxS6MeILYS:lnUzPjflapLnsdT3U2eILY

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
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 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 3 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 1 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 WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe
    "C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1736
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tqlwowsp\
      2⤵
        PID:2308
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bebulnhx.exe" C:\Windows\SysWOW64\tqlwowsp\
        2⤵
          PID:1892
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tqlwowsp binPath= "C:\Windows\SysWOW64\tqlwowsp\bebulnhx.exe /d\"C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1884
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description tqlwowsp "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start tqlwowsp
          2⤵
          • Launches sc.exe
          PID:2572
        • 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:2548
      • C:\Windows\SysWOW64\tqlwowsp\bebulnhx.exe
        C:\Windows\SysWOW64\tqlwowsp\bebulnhx.exe /d"C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2632
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2588

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Persistence

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Privilege Escalation

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Defense Evasion

      Impair Defenses

      2
      T1562

      Disable or Modify Tools

      1
      T1562.001

      Disable or Modify System Firewall

      1
      T1562.004

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\bebulnhx.exe
        Filesize

        11.1MB

        MD5

        8e0708d65f9649b172ffeb9055e26fa9

        SHA1

        c136630b6d9c50114f6af9f2aae726a250f7ce08

        SHA256

        772ee1898a26f9785795fc3b8e0d6557b200b836f5e2e0deef6da855b49f7437

        SHA512

        00dcda01fcdf7de48849ed91d3049e055e6ee5165bc415e57fca4e9bdbcf494f4fbc870fc18984c43bbb442aff29784d8620fd56494ec2a9c881f0b4e460755a

      • memory/1736-18-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/1736-3-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1736-4-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/1736-1-0x0000000000540000-0x0000000000640000-memory.dmp
        Filesize

        1024KB

      • memory/2588-35-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-40-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-61-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2588-9-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2588-57-0x0000000000500000-0x0000000000507000-memory.dmp
        Filesize

        28KB

      • memory/2588-17-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2588-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2588-19-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2588-20-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2588-22-0x00000000018D0000-0x0000000001ADF000-memory.dmp
        Filesize

        2.1MB

      • memory/2588-25-0x00000000018D0000-0x0000000001ADF000-memory.dmp
        Filesize

        2.1MB

      • memory/2588-26-0x00000000001A0000-0x00000000001A6000-memory.dmp
        Filesize

        24KB

      • memory/2588-29-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-33-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-34-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-56-0x00000000058E0000-0x0000000005CEB000-memory.dmp
        Filesize

        4.0MB

      • memory/2588-32-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-13-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2588-39-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-38-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-44-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-45-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-46-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-47-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-48-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-43-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-49-0x0000000000470000-0x0000000000475000-memory.dmp
        Filesize

        20KB

      • memory/2588-42-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-52-0x0000000000470000-0x0000000000475000-memory.dmp
        Filesize

        20KB

      • memory/2588-41-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-37-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-36-0x00000000002E0000-0x00000000002F0000-memory.dmp
        Filesize

        64KB

      • memory/2588-53-0x00000000058E0000-0x0000000005CEB000-memory.dmp
        Filesize

        4.0MB

      • memory/2632-8-0x00000000002F0000-0x00000000003F0000-memory.dmp
        Filesize

        1024KB

      • memory/2632-15-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/2632-10-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB