Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:00

General

  • Target

    0becc5527aba7dc1a746846fc3a2b62f2e46568819b2259d4474eb16e96b9be4.exe

  • Size

    258KB

  • MD5

    c604511f8c117ca36984e8aa66ac0a71

  • SHA1

    7ce156eb70e31fbdf62c3d7e60e6eefff7b21c7d

  • SHA256

    0becc5527aba7dc1a746846fc3a2b62f2e46568819b2259d4474eb16e96b9be4

  • SHA512

    031ffc652bd29c52b8ea733fa6a9e37c9908798d4121d0452c2e0207d17086f43451c273b686ef4c086fc859fe6cf906e403bd09008b11cfc2498ec338ae3441

  • SSDEEP

    3072:xkh5eI/cSz90u2DEJClClQoyLwETsrw/eEOobr6e7AXa2jyQfEBw0coqY7IQPJUD:xkh+BEQ0SBTRVOobrPXYES0cWEQRER

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • 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).

  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0becc5527aba7dc1a746846fc3a2b62f2e46568819b2259d4474eb16e96b9be4.exe
    "C:\Users\Admin\AppData\Local\Temp\0becc5527aba7dc1a746846fc3a2b62f2e46568819b2259d4474eb16e96b9be4.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2300
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\myimqfda\
      2⤵
        PID:2688
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\igqrtpsy.exe" C:\Windows\SysWOW64\myimqfda\
        2⤵
          PID:2424
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create myimqfda binPath= "C:\Windows\SysWOW64\myimqfda\igqrtpsy.exe /d\"C:\Users\Admin\AppData\Local\Temp\0becc5527aba7dc1a746846fc3a2b62f2e46568819b2259d4474eb16e96b9be4.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2568
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description myimqfda "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2440
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start myimqfda
          2⤵
          • Launches sc.exe
          PID:2120
        • 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:2360
      • C:\Windows\SysWOW64\myimqfda\igqrtpsy.exe
        C:\Windows\SysWOW64\myimqfda\igqrtpsy.exe /d"C:\Users\Admin\AppData\Local\Temp\0becc5527aba7dc1a746846fc3a2b62f2e46568819b2259d4474eb16e96b9be4.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2612
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2012

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      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

      2
      T1562

      Disable or Modify Tools

      1
      T1562.001

      Disable or Modify System Firewall

      1
      T1562.004

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        12.6MB

        MD5

        5f9855d42c7bb43e39dc430c3a7e5be0

        SHA1

        a208e3adcdfa927c3129887286ccb64365695403

        SHA256

        eb940d37e6af2b81b54424d3cf106323abcbc18c0fb8a76a71032dd052eda8ac

        SHA512

        8fe4cad180f54323d3c327def21ca0a97d38bf4d25ae038e251e74e4bfce10fafbb347a859abb0a84337ba331059be2f369a649389a5217e745f09bef9de035c

      • memory/2012-39-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-34-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-61-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2012-49-0x0000000000320000-0x0000000000325000-memory.dmp
        Filesize

        20KB

      • memory/2012-29-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-32-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2012-11-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2012-14-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2012-33-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-19-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2012-20-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2012-22-0x0000000001A70000-0x0000000001C7F000-memory.dmp
        Filesize

        2.1MB

      • memory/2012-46-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-35-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-47-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-52-0x0000000000320000-0x0000000000325000-memory.dmp
        Filesize

        20KB

      • memory/2012-53-0x0000000005910000-0x0000000005D1B000-memory.dmp
        Filesize

        4.0MB

      • memory/2012-25-0x0000000001A70000-0x0000000001C7F000-memory.dmp
        Filesize

        2.1MB

      • memory/2012-48-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-26-0x0000000000110000-0x0000000000116000-memory.dmp
        Filesize

        24KB

      • memory/2012-56-0x0000000005910000-0x0000000005D1B000-memory.dmp
        Filesize

        4.0MB

      • memory/2012-45-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-44-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-43-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-57-0x0000000000330000-0x0000000000337000-memory.dmp
        Filesize

        28KB

      • memory/2012-42-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-41-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-40-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-36-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-38-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2012-37-0x00000000001D0000-0x00000000001E0000-memory.dmp
        Filesize

        64KB

      • memory/2300-2-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2300-1-0x00000000004E0000-0x00000000005E0000-memory.dmp
        Filesize

        1024KB

      • memory/2300-7-0x0000000000400000-0x0000000000446000-memory.dmp
        Filesize

        280KB

      • memory/2300-4-0x0000000000400000-0x0000000000446000-memory.dmp
        Filesize

        280KB

      • memory/2612-16-0x0000000000400000-0x0000000000446000-memory.dmp
        Filesize

        280KB

      • memory/2612-10-0x0000000000400000-0x0000000000446000-memory.dmp
        Filesize

        280KB

      • memory/2612-9-0x0000000000250000-0x0000000000350000-memory.dmp
        Filesize

        1024KB