Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-05-2024 08:19

General

  • Target

    a078ee9114d1a84eebf3907da57c45688e9a83578a2c885ff828a1af190f5054.exe

  • Size

    11.9MB

  • MD5

    09f9db5d494ac551d4889428ab8bb152

  • SHA1

    85154b6284cfe04cf421c26c8f6fdb3fd0fca7b8

  • SHA256

    a078ee9114d1a84eebf3907da57c45688e9a83578a2c885ff828a1af190f5054

  • SHA512

    5f6b59b8bad754d6c9a545d9b73e04456258ad70395d9df9b97e1797749b8bdbaa18fbc4dd0e212ee17bbfd4b84687265a13671bc08b9ed44b336b58b425a52f

  • SSDEEP

    98304:BGWqJ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++e:R

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) 2 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\a078ee9114d1a84eebf3907da57c45688e9a83578a2c885ff828a1af190f5054.exe
    "C:\Users\Admin\AppData\Local\Temp\a078ee9114d1a84eebf3907da57c45688e9a83578a2c885ff828a1af190f5054.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3552
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zpgdfgwy\
      2⤵
        PID:4116
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gpvgetl.exe" C:\Windows\SysWOW64\zpgdfgwy\
        2⤵
          PID:4740
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zpgdfgwy binPath= "C:\Windows\SysWOW64\zpgdfgwy\gpvgetl.exe /d\"C:\Users\Admin\AppData\Local\Temp\a078ee9114d1a84eebf3907da57c45688e9a83578a2c885ff828a1af190f5054.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2728
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zpgdfgwy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4060
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zpgdfgwy
          2⤵
          • Launches sc.exe
          PID:2372
        • 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:1980
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3552 -s 1048
          2⤵
          • Program crash
          PID:1348
      • C:\Windows\SysWOW64\zpgdfgwy\gpvgetl.exe
        C:\Windows\SysWOW64\zpgdfgwy\gpvgetl.exe /d"C:\Users\Admin\AppData\Local\Temp\a078ee9114d1a84eebf3907da57c45688e9a83578a2c885ff828a1af190f5054.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2496
        • 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:2176
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2496 -s 524
          2⤵
          • Program crash
          PID:3636
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3552 -ip 3552
        1⤵
          PID:1772
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2496 -ip 2496
          1⤵
            PID:1656

          Network

          MITRE ATT&CK Matrix ATT&CK v13

          Execution

          System Services

          1
          T1569

          Service Execution

          1
          T1569.002

          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

          1
          T1562

          Disable or Modify System Firewall

          1
          T1562.004

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            13.0MB

            MD5

            7233e860e5558394a17f192e31e4efc6

            SHA1

            13970b3de25fe019e9fdb3f0cb06c649a42395ce

            SHA256

            c7409f347a1c3e9d1a8211abf4e3b1c537fc13a33b595e68d18719868aa47073

            SHA512

            56173b12cc3c0fd4bfe49eca2c5dbde522e59c61e23434b3372b51f1a23b6bdd821d2e2669e4abff4961bf310b51bb0bdae51ae053920cb58eb017b19543cce1

          • memory/2176-41-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-42-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-61-0x0000000000A60000-0x0000000000A75000-memory.dmp
            Filesize

            84KB

          • memory/2176-32-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-10-0x0000000000A60000-0x0000000000A75000-memory.dmp
            Filesize

            84KB

          • memory/2176-13-0x0000000000A60000-0x0000000000A75000-memory.dmp
            Filesize

            84KB

          • memory/2176-57-0x0000000002BD0000-0x0000000002BD7000-memory.dmp
            Filesize

            28KB

          • memory/2176-33-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-34-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-35-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-53-0x0000000007640000-0x0000000007A4B000-memory.dmp
            Filesize

            4.0MB

          • memory/2176-19-0x0000000000A60000-0x0000000000A75000-memory.dmp
            Filesize

            84KB

          • memory/2176-20-0x0000000000A60000-0x0000000000A75000-memory.dmp
            Filesize

            84KB

          • memory/2176-22-0x0000000002600000-0x000000000280F000-memory.dmp
            Filesize

            2.1MB

          • memory/2176-29-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-26-0x0000000000BF0000-0x0000000000BF6000-memory.dmp
            Filesize

            24KB

          • memory/2176-25-0x0000000002600000-0x000000000280F000-memory.dmp
            Filesize

            2.1MB

          • memory/2176-52-0x0000000001DF0000-0x0000000001DF5000-memory.dmp
            Filesize

            20KB

          • memory/2176-37-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-36-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-56-0x0000000007640000-0x0000000007A4B000-memory.dmp
            Filesize

            4.0MB

          • memory/2176-49-0x0000000001DF0000-0x0000000001DF5000-memory.dmp
            Filesize

            20KB

          • memory/2176-48-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-47-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-46-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-45-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-44-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-43-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-38-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-39-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2176-40-0x0000000001DE0000-0x0000000001DF0000-memory.dmp
            Filesize

            64KB

          • memory/2496-9-0x0000000000400000-0x00000000006DE000-memory.dmp
            Filesize

            2.9MB

          • memory/2496-15-0x0000000000400000-0x00000000006DE000-memory.dmp
            Filesize

            2.9MB

          • memory/2496-8-0x0000000000400000-0x00000000006DE000-memory.dmp
            Filesize

            2.9MB

          • memory/3552-1-0x0000000000A10000-0x0000000000B10000-memory.dmp
            Filesize

            1024KB

          • memory/3552-3-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/3552-16-0x0000000000400000-0x00000000006DE000-memory.dmp
            Filesize

            2.9MB

          • memory/3552-17-0x0000000000830000-0x0000000000843000-memory.dmp
            Filesize

            76KB

          • memory/3552-18-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/3552-2-0x0000000000830000-0x0000000000843000-memory.dmp
            Filesize

            76KB