Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 12:21

General

  • Target

    aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe

  • Size

    256KB

  • MD5

    11d6fdab8ce0a4462699d12d8cc6e181

  • SHA1

    f79dd773636fb0c46346f08e9a36bea666e34350

  • SHA256

    aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5

  • SHA512

    dd582a962bc9d3c50782a528a1c635d065530b96f7e1325d0c254f299b10b29218a8626b15f18b11aaf234b7393cea39d8025fa8d023fa9e79bdbdce2d6478a6

  • SSDEEP

    3072:DlrJL/wyRvNQG+FiOf5hqBNDo0Rpv01b8FbuW5hL4WeNH601:D3L/wUkFiOf5Ybon1gL4WeNa

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
  • 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\aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe
    "C:\Users\Admin\AppData\Local\Temp\aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2168
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ggummbya\
      2⤵
        PID:2912
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uxunegaq.exe" C:\Windows\SysWOW64\ggummbya\
        2⤵
          PID:1916
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ggummbya binPath= "C:\Windows\SysWOW64\ggummbya\uxunegaq.exe /d\"C:\Users\Admin\AppData\Local\Temp\aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2560
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ggummbya "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2540
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ggummbya
          2⤵
          • Launches sc.exe
          PID:2680
        • 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:2580
      • C:\Windows\SysWOW64\ggummbya\uxunegaq.exe
        C:\Windows\SysWOW64\ggummbya\uxunegaq.exe /d"C:\Users\Admin\AppData\Local\Temp\aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2432
        • 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:2832

      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\uxunegaq.exe
        Filesize

        11.7MB

        MD5

        9a742bf50814c23c99714c4c1d244ee7

        SHA1

        6966f62ba3b4f5ba9890e6305e438be8f924d236

        SHA256

        7a49de8120cc75fae1b1a59d7c711fcbba7cd35b4e93fbb2109aa7516e6515f3

        SHA512

        98cdbdefdd3519de924d0b1af4bb65827ecdf1fa2ee79469da90d16da6ba8f9485baad88a9dc4db4586aaba020ab471d847e3d0af80029435146ad27af3295f7

      • memory/2168-2-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2168-4-0x0000000000400000-0x0000000000862000-memory.dmp
        Filesize

        4.4MB

      • memory/2168-8-0x0000000000400000-0x0000000000862000-memory.dmp
        Filesize

        4.4MB

      • memory/2168-9-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2168-1-0x0000000000960000-0x0000000000A60000-memory.dmp
        Filesize

        1024KB

      • memory/2432-13-0x0000000000400000-0x0000000000862000-memory.dmp
        Filesize

        4.4MB

      • memory/2432-18-0x0000000000400000-0x0000000000862000-memory.dmp
        Filesize

        4.4MB

      • memory/2432-10-0x0000000000940000-0x0000000000A40000-memory.dmp
        Filesize

        1024KB

      • memory/2832-35-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-40-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2832-20-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2832-21-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2832-23-0x00000000019E0000-0x0000000001BEF000-memory.dmp
        Filesize

        2.1MB

      • memory/2832-26-0x00000000019E0000-0x0000000001BEF000-memory.dmp
        Filesize

        2.1MB

      • memory/2832-27-0x0000000000160000-0x0000000000166000-memory.dmp
        Filesize

        24KB

      • memory/2832-30-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-37-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-36-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-11-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2832-34-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-33-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-38-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-15-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2832-41-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-42-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-39-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-43-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-44-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-45-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-50-0x00000000001E0000-0x00000000001E5000-memory.dmp
        Filesize

        20KB

      • memory/2832-49-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-48-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-47-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-46-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2832-53-0x00000000001E0000-0x00000000001E5000-memory.dmp
        Filesize

        20KB

      • memory/2832-54-0x0000000005840000-0x0000000005C4B000-memory.dmp
        Filesize

        4.0MB

      • memory/2832-57-0x0000000005840000-0x0000000005C4B000-memory.dmp
        Filesize

        4.0MB

      • memory/2832-58-0x0000000000480000-0x0000000000487000-memory.dmp
        Filesize

        28KB

      • memory/2832-62-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB