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Analysis

  • max time kernel
    152s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/01/2024, 15:17

General

  • Target

    SecuriteInfo.com.Win32.BotX-gen.31335.exe

  • Size

    203KB

  • MD5

    e80ed6ccb333b7fc33ffc98bca43b57d

  • SHA1

    170281a608fe94eee06a9f45466f6a47bd2272e3

  • SHA256

    3555ecd8bb270312994e03bf64695a3f1c0213a2abf85b890ebe2bb40a9648a3

  • SHA512

    3209c004cebb1e2f544f7d8457175a62da8a225bc08bcbb051c240eddc610ca8e1ddfe7f6d758d2e09517030afad689b6805fc2b8b801a1f182c04369191a30d

  • SSDEEP

    3072:eafjdfYraZJXENc8uCXJiXK1K2LEpzUCV+PaIh9bwdANblLNBNKRrxbU+cmH:eafjqQ15OCyLLkCVkxbDco

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 1 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\SecuriteInfo.com.Win32.BotX-gen.31335.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.BotX-gen.31335.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4148
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\moxlxjak\
      2⤵
        PID:2652
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pffcoaqo.exe" C:\Windows\SysWOW64\moxlxjak\
        2⤵
          PID:2144
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create moxlxjak binPath= "C:\Windows\SysWOW64\moxlxjak\pffcoaqo.exe /d\"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.BotX-gen.31335.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3796
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description moxlxjak "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4792
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start moxlxjak
          2⤵
          • Launches sc.exe
          PID:1084
        • 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:3992
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4148 -s 676
          2⤵
          • Program crash
          PID:2468
      • C:\Windows\SysWOW64\moxlxjak\pffcoaqo.exe
        C:\Windows\SysWOW64\moxlxjak\pffcoaqo.exe /d"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.BotX-gen.31335.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3532
        • 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:2460
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3532 -s 528
          2⤵
          • Program crash
          PID:4548
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3532 -ip 3532
        1⤵
          PID:484
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4148 -ip 4148
          1⤵
            PID:1724

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            14.1MB

            MD5

            a9e07b1c3f5027df704c4a20cfe23ae6

            SHA1

            b40074ba47f923c9088e32b74baa778dc12017b9

            SHA256

            3380502e940914c13ccdef2156b615e5a28d41c3087ac61d91b9f034a4daec5a

            SHA512

            2c4a9a8414fd8a32a0760e91301b3e26ae02f4bd68294700861c9ee065e859e672fc3e9abc787ec998e9f362739194dbe946c3fd7849426b64ba140a6ebb7483

          • C:\Windows\SysWOW64\moxlxjak\pffcoaqo.exe

            Filesize

            2.9MB

            MD5

            b5bf202b4081f82cecbd5242c282eedd

            SHA1

            3749c886b421bea92fa498459e32631af37a68de

            SHA256

            ef542e6fbe0e9884517633c3bdf19570170ae1732161907e7be25cca79eeebe7

            SHA512

            5ef036d3456f9c36a13be6effbe65ea168a882b64df63d58ad746e664695a819f46f76a57b8bc3ba20039177615a4cbec6b64c5591523d33ba686454ed1b6387

          • memory/2460-42-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-30-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-59-0x0000000001270000-0x0000000001285000-memory.dmp

            Filesize

            84KB

          • memory/2460-55-0x00000000033E0000-0x00000000033E7000-memory.dmp

            Filesize

            28KB

          • memory/2460-54-0x0000000007E40000-0x000000000824B000-memory.dmp

            Filesize

            4.0MB

          • memory/2460-10-0x0000000001270000-0x0000000001285000-memory.dmp

            Filesize

            84KB

          • memory/2460-13-0x0000000001270000-0x0000000001285000-memory.dmp

            Filesize

            84KB

          • memory/2460-51-0x0000000007E40000-0x000000000824B000-memory.dmp

            Filesize

            4.0MB

          • memory/2460-50-0x00000000033D0000-0x00000000033D5000-memory.dmp

            Filesize

            20KB

          • memory/2460-45-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-17-0x0000000001270000-0x0000000001285000-memory.dmp

            Filesize

            84KB

          • memory/2460-18-0x0000000001270000-0x0000000001285000-memory.dmp

            Filesize

            84KB

          • memory/2460-20-0x0000000002E00000-0x000000000300F000-memory.dmp

            Filesize

            2.1MB

          • memory/2460-23-0x0000000002E00000-0x000000000300F000-memory.dmp

            Filesize

            2.1MB

          • memory/2460-24-0x00000000025E0000-0x00000000025E6000-memory.dmp

            Filesize

            24KB

          • memory/2460-27-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-31-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-32-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-47-0x00000000033D0000-0x00000000033D5000-memory.dmp

            Filesize

            20KB

          • memory/2460-33-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-37-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-35-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-36-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-34-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-39-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-38-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-40-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-41-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-46-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-43-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/2460-44-0x00000000025F0000-0x0000000002600000-memory.dmp

            Filesize

            64KB

          • memory/3532-15-0x0000000000C00000-0x0000000000C13000-memory.dmp

            Filesize

            76KB

          • memory/3532-14-0x0000000000400000-0x0000000000438000-memory.dmp

            Filesize

            224KB

          • memory/3532-9-0x0000000000400000-0x0000000000438000-memory.dmp

            Filesize

            224KB

          • memory/3532-8-0x00000000007D0000-0x00000000008D0000-memory.dmp

            Filesize

            1024KB

          • memory/4148-1-0x00000000004F0000-0x00000000005F0000-memory.dmp

            Filesize

            1024KB

          • memory/4148-3-0x0000000000400000-0x0000000000438000-memory.dmp

            Filesize

            224KB

          • memory/4148-16-0x0000000000400000-0x0000000000438000-memory.dmp

            Filesize

            224KB

          • memory/4148-2-0x0000000002190000-0x00000000021A3000-memory.dmp

            Filesize

            76KB