Analysis

  • max time kernel
    158s
  • max time network
    172s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/01/2024, 19:20

General

  • Target

    a1221c43754f0bf8adfe72560dabb5e2.exe

  • Size

    10.2MB

  • MD5

    a1221c43754f0bf8adfe72560dabb5e2

  • SHA1

    d28d5ffec4c801eddf253cd8f6bc22909dee244e

  • SHA256

    c4edf15d1762c66cdd4fc361fc423ce59fe23b5bea8609f611bd0c0518f5f39c

  • SHA512

    8b0c60f1f5a028d5accdd48b88993d1581d785f1c035e81d0dee6420a6fb840883decdf6ff28b5c5a6d6c16b048b3fffad402844774ce9a338185b2682c60109

  • SSDEEP

    49152:8vVGWdbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbP:8vV

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

lazystax.ru

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
  • 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
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a1221c43754f0bf8adfe72560dabb5e2.exe
    "C:\Users\Admin\AppData\Local\Temp\a1221c43754f0bf8adfe72560dabb5e2.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3796
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zizhabjm\
      2⤵
        PID:2088
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jnuesfnd.exe" C:\Windows\SysWOW64\zizhabjm\
        2⤵
          PID:540
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zizhabjm binPath= "C:\Windows\SysWOW64\zizhabjm\jnuesfnd.exe /d\"C:\Users\Admin\AppData\Local\Temp\a1221c43754f0bf8adfe72560dabb5e2.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1904
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zizhabjm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3960
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zizhabjm
          2⤵
          • Launches sc.exe
          PID:3396
        • 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:4416
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3796 -s 1156
          2⤵
          • Program crash
          PID:4672
      • C:\Windows\SysWOW64\zizhabjm\jnuesfnd.exe
        C:\Windows\SysWOW64\zizhabjm\jnuesfnd.exe /d"C:\Users\Admin\AppData\Local\Temp\a1221c43754f0bf8adfe72560dabb5e2.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3236
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:4144
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3236 -s 512
          2⤵
          • Program crash
          PID:4604
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3796 -ip 3796
        1⤵
          PID:3520
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3236 -ip 3236
          1⤵
            PID:376

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

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

                  Filesize

                  1.5MB

                  MD5

                  fecc4e9436d9c5b3b4a0d93ed1253a8c

                  SHA1

                  b55e7bb44cec08479f89b359d5a9c337cadb3427

                  SHA256

                  fb948ef5f98b1bc2d918c304b5239112d05463469b837a9939d8ede3cc782f4f

                  SHA512

                  8d278e1d527565deabc94bc7f9be6a7b36cd3a7f1eacb3302d95a7eff7f659f3f8084fc82194d32c898bb573c0dd2d10b4bcaa2c9a8cdec9f4edebc9098d0ce8

                • C:\Windows\SysWOW64\zizhabjm\jnuesfnd.exe

                  Filesize

                  217KB

                  MD5

                  2785c4e847e54a0c04442c60d65e110e

                  SHA1

                  fc92411daa3417697e3eeb5bad517376946ca114

                  SHA256

                  999eb3c207ababc5d71cf7c726adf7ecd6ffeff98f98a9687c42684120848692

                  SHA512

                  1d4d7826f0d3f3bdc6b9077385a81d56c45a4e6c080fc09aa49e64495819d7dd0ced1050fbd6a0badef319943782b1c892984f5dfe71068c0695102972d39d14

                • memory/3236-17-0x0000000000400000-0x0000000000C17000-memory.dmp

                  Filesize

                  8.1MB

                • memory/3236-13-0x0000000000400000-0x0000000000C17000-memory.dmp

                  Filesize

                  8.1MB

                • memory/3236-10-0x0000000000EE0000-0x0000000000FE0000-memory.dmp

                  Filesize

                  1024KB

                • memory/3796-4-0x0000000000400000-0x0000000000C17000-memory.dmp

                  Filesize

                  8.1MB

                • memory/3796-2-0x0000000002820000-0x0000000002833000-memory.dmp

                  Filesize

                  76KB

                • memory/3796-7-0x0000000000400000-0x0000000000C17000-memory.dmp

                  Filesize

                  8.1MB

                • memory/3796-8-0x0000000002820000-0x0000000002833000-memory.dmp

                  Filesize

                  76KB

                • memory/3796-1-0x0000000000CA0000-0x0000000000DA0000-memory.dmp

                  Filesize

                  1024KB

                • memory/4144-15-0x0000000001000000-0x0000000001015000-memory.dmp

                  Filesize

                  84KB

                • memory/4144-18-0x0000000001000000-0x0000000001015000-memory.dmp

                  Filesize

                  84KB

                • memory/4144-16-0x0000000001000000-0x0000000001015000-memory.dmp

                  Filesize

                  84KB

                • memory/4144-11-0x0000000001000000-0x0000000001015000-memory.dmp

                  Filesize

                  84KB

                • memory/4144-19-0x0000000001000000-0x0000000001015000-memory.dmp

                  Filesize

                  84KB