Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 14:14

General

  • Target

    43428294fd339a6c66b4ba9af723593f386808db747f2b2ba7a0dc0117379171.exe

  • Size

    235KB

  • MD5

    85899a98881db336949f636dfd6f3d5b

  • SHA1

    6b59c57d02a4fa9f503e064585e6dba562c63a8f

  • SHA256

    43428294fd339a6c66b4ba9af723593f386808db747f2b2ba7a0dc0117379171

  • SHA512

    df506d5fd86ae2c7c906b328e25d99d0362eda272eb0a4381449a836c69acf999d5942fabfc4960529482a98b8c71f6eadec1ca153de2e2d4f8042c50bfa69db

  • SSDEEP

    3072:j72kySmwWaXJVCadJizA1KSB2sxhXM3tl64C5ARvc:j7236qahM3tLc

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\43428294fd339a6c66b4ba9af723593f386808db747f2b2ba7a0dc0117379171.exe
    "C:\Users\Admin\AppData\Local\Temp\43428294fd339a6c66b4ba9af723593f386808db747f2b2ba7a0dc0117379171.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3060
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rohzxvhe\
      2⤵
        PID:1872
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pffcoaqo.exe" C:\Windows\SysWOW64\rohzxvhe\
        2⤵
          PID:2516
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rohzxvhe binPath= "C:\Windows\SysWOW64\rohzxvhe\pffcoaqo.exe /d\"C:\Users\Admin\AppData\Local\Temp\43428294fd339a6c66b4ba9af723593f386808db747f2b2ba7a0dc0117379171.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2616
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rohzxvhe "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2564
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rohzxvhe
          2⤵
          • Launches sc.exe
          PID:2712
        • 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:2432
      • C:\Windows\SysWOW64\rohzxvhe\pffcoaqo.exe
        C:\Windows\SysWOW64\rohzxvhe\pffcoaqo.exe /d"C:\Users\Admin\AppData\Local\Temp\43428294fd339a6c66b4ba9af723593f386808db747f2b2ba7a0dc0117379171.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2192
        • 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:2420

      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\pffcoaqo.exe
        Filesize

        13.0MB

        MD5

        8d6e66c231f8ee480d6271199d2e572c

        SHA1

        81473b62316a9e19d29a7cd46591e41de9d8664a

        SHA256

        9ea0f7f84ec6feac3bd003b127ab4553590feaaa7614a7322111daf04021b55e

        SHA512

        ab772452dff52be31bd405921d4c3366a3fd4c0b5e39a40c19e89f986dee4f8a8fb77ed090838d355f9a79c2633ccc44204cf62aff6fc86cb809c99e29f6ba07

      • memory/2192-15-0x00000000004D0000-0x00000000005D0000-memory.dmp
        Filesize

        1024KB

      • memory/2192-16-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/2420-32-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-57-0x0000000000130000-0x0000000000137000-memory.dmp
        Filesize

        28KB

      • memory/2420-61-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2420-36-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2420-10-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2420-37-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-56-0x0000000005A90000-0x0000000005E9B000-memory.dmp
        Filesize

        4.0MB

      • memory/2420-19-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2420-20-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2420-22-0x0000000001A40000-0x0000000001C4F000-memory.dmp
        Filesize

        2.1MB

      • memory/2420-25-0x0000000001A40000-0x0000000001C4F000-memory.dmp
        Filesize

        2.1MB

      • memory/2420-26-0x00000000000C0000-0x00000000000C6000-memory.dmp
        Filesize

        24KB

      • memory/2420-29-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-35-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-34-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-33-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-53-0x0000000005A90000-0x0000000005E9B000-memory.dmp
        Filesize

        4.0MB

      • memory/2420-13-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2420-38-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-48-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-49-0x0000000000120000-0x0000000000125000-memory.dmp
        Filesize

        20KB

      • memory/2420-47-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-46-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-45-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-44-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-43-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-42-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-52-0x0000000000120000-0x0000000000125000-memory.dmp
        Filesize

        20KB

      • memory/2420-41-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-40-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/2420-39-0x0000000000110000-0x0000000000120000-memory.dmp
        Filesize

        64KB

      • memory/3060-7-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/3060-2-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/3060-1-0x0000000000560000-0x0000000000660000-memory.dmp
        Filesize

        1024KB

      • memory/3060-4-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/3060-8-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB