Analysis

  • max time kernel
    142s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/03/2024, 02:51

General

  • Target

    c1abfa29655f3cfb43177a79e2762990.exe

  • Size

    10.0MB

  • MD5

    c1abfa29655f3cfb43177a79e2762990

  • SHA1

    a3f011d09806bc9560a8584482a5f1f90303445a

  • SHA256

    05668b1f4a68a7148117cda757555dd79ec8c53a3f966c49623f3301f59ad05c

  • SHA512

    7487bc17c5ab14641388c6a60168f86fe55a44a23b8b695710e003a7bd02ac2f1808abe24bbbbca440782b7807a8ea721fb864c8dc48b9d114f917138cfacb77

  • SSDEEP

    98304:Tjhd88888888888888888888888888888888888888888888888888888888888c:T

Malware Config

Extracted

Family

tofsee

C2

176.111.174.19

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 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
  • 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\c1abfa29655f3cfb43177a79e2762990.exe
    "C:\Users\Admin\AppData\Local\Temp\c1abfa29655f3cfb43177a79e2762990.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2172
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ltvqcaha\
      2⤵
        PID:4644
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\idzgscqf.exe" C:\Windows\SysWOW64\ltvqcaha\
        2⤵
          PID:1488
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ltvqcaha binPath= "C:\Windows\SysWOW64\ltvqcaha\idzgscqf.exe /d\"C:\Users\Admin\AppData\Local\Temp\c1abfa29655f3cfb43177a79e2762990.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3532
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ltvqcaha "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3028
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ltvqcaha
          2⤵
          • Launches sc.exe
          PID:4284
        • 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:4240
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2172 -s 580
          2⤵
          • Program crash
          PID:5068
      • C:\Windows\SysWOW64\ltvqcaha\idzgscqf.exe
        C:\Windows\SysWOW64\ltvqcaha\idzgscqf.exe /d"C:\Users\Admin\AppData\Local\Temp\c1abfa29655f3cfb43177a79e2762990.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1212
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:2824
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1212 -s 516
          2⤵
          • Program crash
          PID:1784
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2172 -ip 2172
        1⤵
          PID:3232
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1212 -ip 1212
          1⤵
            PID:2780

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

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

                  Filesize

                  11.3MB

                  MD5

                  b6bbf527f5e5d14dfcf61457407752c5

                  SHA1

                  520a7513da102795fb9ecf99cc1e2740fd5cf061

                  SHA256

                  4a96dcedb9576739a5f0e64c949516fa2fbbf40c06350b490e4d7e7cfc77581e

                  SHA512

                  e9b7d607374eaf54108d6c6336edcbd563d6a2577f53a5a1598d7b6e1e930f5101b69ab0fb62dd8f680717abf1ef8748fce452d3965201eabe4ae9ef54e0be5f

                • memory/1212-10-0x0000000000590000-0x0000000000690000-memory.dmp

                  Filesize

                  1024KB

                • memory/1212-11-0x0000000000400000-0x000000000045D000-memory.dmp

                  Filesize

                  372KB

                • memory/1212-18-0x0000000000400000-0x000000000045D000-memory.dmp

                  Filesize

                  372KB

                • memory/2172-4-0x0000000000400000-0x000000000045D000-memory.dmp

                  Filesize

                  372KB

                • memory/2172-2-0x00000000005E0000-0x00000000005F3000-memory.dmp

                  Filesize

                  76KB

                • memory/2172-7-0x0000000000400000-0x000000000045D000-memory.dmp

                  Filesize

                  372KB

                • memory/2172-8-0x00000000005E0000-0x00000000005F3000-memory.dmp

                  Filesize

                  76KB

                • memory/2172-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

                  Filesize

                  1024KB

                • memory/2824-12-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

                  Filesize

                  84KB

                • memory/2824-15-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

                  Filesize

                  84KB

                • memory/2824-16-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

                  Filesize

                  84KB

                • memory/2824-17-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

                  Filesize

                  84KB

                • memory/2824-19-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

                  Filesize

                  84KB