Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-04-2024 13:32

General

  • Target

    3d24879020f71f37768efb2dcd3724477b190b9f0c7f87c72edb472f81123ec5.exe

  • Size

    238KB

  • MD5

    761915a4ae82207a72f8b60786d00a97

  • SHA1

    0892117051b95db0240247a83d9798c103b05897

  • SHA256

    3d24879020f71f37768efb2dcd3724477b190b9f0c7f87c72edb472f81123ec5

  • SHA512

    6dbb4dbf15d9c9f086394b6a52a2d59736b8454f525bdb39253b1a289f511edcd5fe33c43c1baf0cfa2aba186710d5442d111ce2343a6f2a26c82913c1eb2d4c

  • SSDEEP

    3072:d/PLinbwusnVoPhS6dxuUo6U4Gn0gDbsw6QeKWl+4zQ/ZwBV7VP:d/PLCbxuUYGgDbskkwg

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.

  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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).

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3d24879020f71f37768efb2dcd3724477b190b9f0c7f87c72edb472f81123ec5.exe
    "C:\Users\Admin\AppData\Local\Temp\3d24879020f71f37768efb2dcd3724477b190b9f0c7f87c72edb472f81123ec5.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4488
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ifagwlbd\
      2⤵
        PID:2384
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rdliobhf.exe" C:\Windows\SysWOW64\ifagwlbd\
        2⤵
          PID:2012
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ifagwlbd binPath= "C:\Windows\SysWOW64\ifagwlbd\rdliobhf.exe /d\"C:\Users\Admin\AppData\Local\Temp\3d24879020f71f37768efb2dcd3724477b190b9f0c7f87c72edb472f81123ec5.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3748
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ifagwlbd "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1140
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ifagwlbd
          2⤵
          • Launches sc.exe
          PID:2808
        • 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:456
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4488 -s 1040
          2⤵
          • Program crash
          PID:2636
      • C:\Windows\SysWOW64\ifagwlbd\rdliobhf.exe
        C:\Windows\SysWOW64\ifagwlbd\rdliobhf.exe /d"C:\Users\Admin\AppData\Local\Temp\3d24879020f71f37768efb2dcd3724477b190b9f0c7f87c72edb472f81123ec5.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:836
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2196
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 836 -s 508
          2⤵
          • Program crash
          PID:4048
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4488 -ip 4488
        1⤵
          PID:4636
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 836 -ip 836
          1⤵
            PID:2976

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            10.8MB

            MD5

            63a838fa7b38bf144142d1f6254b3906

            SHA1

            20db811ca42b8bc9a049c94d77f8721bf9e8fd5d

            SHA256

            3972544f8c6f8ab99efb00a3799118547727f15e4dd54aa5e40dd1bee54a54dd

            SHA512

            a1ff9258174447b56d2101d0c64c3877b836fa618331123aabcf62f36e4aadf66206072b9d589e0b7f7e942c97346ec9019865962c5f9b107ea6856447137df9

          • memory/836-14-0x0000000000400000-0x000000000085D000-memory.dmp
            Filesize

            4.4MB

          • memory/836-11-0x00000000009E0000-0x0000000000AE0000-memory.dmp
            Filesize

            1024KB

          • memory/2196-33-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-39-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-59-0x0000000000D10000-0x0000000000D25000-memory.dmp
            Filesize

            84KB

          • memory/2196-35-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-34-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-44-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-16-0x0000000000D10000-0x0000000000D25000-memory.dmp
            Filesize

            84KB

          • memory/2196-17-0x0000000000D10000-0x0000000000D25000-memory.dmp
            Filesize

            84KB

          • memory/2196-20-0x0000000002C00000-0x0000000002E0F000-memory.dmp
            Filesize

            2.1MB

          • memory/2196-23-0x0000000002C00000-0x0000000002E0F000-memory.dmp
            Filesize

            2.1MB

          • memory/2196-24-0x00000000023C0000-0x00000000023C6000-memory.dmp
            Filesize

            24KB

          • memory/2196-27-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-31-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-30-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-32-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-54-0x0000000007B00000-0x0000000007F0B000-memory.dmp
            Filesize

            4.0MB

          • memory/2196-55-0x00000000023F0000-0x00000000023F7000-memory.dmp
            Filesize

            28KB

          • memory/2196-51-0x0000000007B00000-0x0000000007F0B000-memory.dmp
            Filesize

            4.0MB

          • memory/2196-12-0x0000000000D10000-0x0000000000D25000-memory.dmp
            Filesize

            84KB

          • memory/2196-43-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-45-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-42-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-46-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-41-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-40-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-50-0x00000000023E0000-0x00000000023E5000-memory.dmp
            Filesize

            20KB

          • memory/2196-38-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-37-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-36-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/2196-47-0x00000000023E0000-0x00000000023E5000-memory.dmp
            Filesize

            20KB

          • memory/4488-9-0x0000000000400000-0x000000000085D000-memory.dmp
            Filesize

            4.4MB

          • memory/4488-4-0x0000000000400000-0x000000000085D000-memory.dmp
            Filesize

            4.4MB

          • memory/4488-1-0x0000000000B80000-0x0000000000C80000-memory.dmp
            Filesize

            1024KB

          • memory/4488-2-0x0000000000AD0000-0x0000000000AE3000-memory.dmp
            Filesize

            76KB

          • memory/4488-10-0x0000000000AD0000-0x0000000000AE3000-memory.dmp
            Filesize

            76KB