Analysis

  • max time kernel
    147s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-09-2024 16:05

General

  • Target

    2ceb7d489e52c22b3400be1033d415d48f46548940e9519bf23ce3053d8a0a07.exe

  • Size

    399KB

  • MD5

    0739f44be0a711a02242bd37e1794796

  • SHA1

    7bc1505e740bc2f926cd72ab55615b9dc070ac5b

  • SHA256

    2ceb7d489e52c22b3400be1033d415d48f46548940e9519bf23ce3053d8a0a07

  • SHA512

    f23776894833937c752c161033295450f5a0b7a01f4454e4e96bac05a09193b2a2facb0287f5f7ff8dd1bd49e7f8172311b8401cb9b1986aafb73c9730f337b0

  • SSDEEP

    6144:f89I3KfShUDe2hAI+WBO5sIBdwWBCA+HO3njSRw:f89I3KfShUDMIRBSCLHO+

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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2ceb7d489e52c22b3400be1033d415d48f46548940e9519bf23ce3053d8a0a07.exe
    "C:\Users\Admin\AppData\Local\Temp\2ceb7d489e52c22b3400be1033d415d48f46548940e9519bf23ce3053d8a0a07.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2836
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pfydmxmc\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2788
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eqgthgyc.exe" C:\Windows\SysWOW64\pfydmxmc\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2976
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create pfydmxmc binPath= "C:\Windows\SysWOW64\pfydmxmc\eqgthgyc.exe /d\"C:\Users\Admin\AppData\Local\Temp\2ceb7d489e52c22b3400be1033d415d48f46548940e9519bf23ce3053d8a0a07.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3480
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description pfydmxmc "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4904
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start pfydmxmc
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:652
    • 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
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:4424
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2836 -s 1032
      2⤵
      • Program crash
      PID:2572
  • C:\Windows\SysWOW64\pfydmxmc\eqgthgyc.exe
    C:\Windows\SysWOW64\pfydmxmc\eqgthgyc.exe /d"C:\Users\Admin\AppData\Local\Temp\2ceb7d489e52c22b3400be1033d415d48f46548940e9519bf23ce3053d8a0a07.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4732
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:2260
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4732 -s 512
      2⤵
      • Program crash
      PID:864
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2836 -ip 2836
    1⤵
      PID:1020
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4732 -ip 4732
      1⤵
        PID:4580

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        14.7MB

        MD5

        53a710d3911c5552bd60bbdecbcd1f12

        SHA1

        b9a01f9c795c69a4b5349ad877e685dedf72f722

        SHA256

        3a7d0a8e13426cdaeb43e1e7630c66facc9c4a87f59cabef1de28ae8eff85493

        SHA512

        e67ee98337895ca81dc5e15ea0d278a2fd6c378e3c2af256d4d3cc7a68bbb5f9453aa6aad969e378ca7e30baf0a15d2b8b59d821a4846cdae47defe1588f4ca9

      • memory/2260-46-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-36-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-21-0x0000000002C00000-0x0000000002E0F000-memory.dmp

        Filesize

        2.1MB

      • memory/2260-47-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-24-0x0000000002C00000-0x0000000002E0F000-memory.dmp

        Filesize

        2.1MB

      • memory/2260-25-0x0000000002F50000-0x0000000002F56000-memory.dmp

        Filesize

        24KB

      • memory/2260-28-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-32-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-16-0x00000000010A0000-0x00000000010B5000-memory.dmp

        Filesize

        84KB

      • memory/2260-14-0x00000000010A0000-0x00000000010B5000-memory.dmp

        Filesize

        84KB

      • memory/2260-33-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-17-0x00000000010A0000-0x00000000010B5000-memory.dmp

        Filesize

        84KB

      • memory/2260-34-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-45-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-52-0x0000000007C40000-0x000000000804B000-memory.dmp

        Filesize

        4.0MB

      • memory/2260-56-0x0000000008190000-0x0000000008197000-memory.dmp

        Filesize

        28KB

      • memory/2260-51-0x00000000031F0000-0x00000000031F5000-memory.dmp

        Filesize

        20KB

      • memory/2260-48-0x00000000031F0000-0x00000000031F5000-memory.dmp

        Filesize

        20KB

      • memory/2260-55-0x0000000007C40000-0x000000000804B000-memory.dmp

        Filesize

        4.0MB

      • memory/2260-31-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-40-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-44-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-43-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-42-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-41-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-39-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-38-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-37-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2260-35-0x0000000002F60000-0x0000000002F70000-memory.dmp

        Filesize

        64KB

      • memory/2836-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2836-1-0x0000000000900000-0x0000000000A00000-memory.dmp

        Filesize

        1024KB

      • memory/2836-8-0x0000000000850000-0x0000000000863000-memory.dmp

        Filesize

        76KB

      • memory/2836-7-0x0000000000400000-0x00000000005F8000-memory.dmp

        Filesize

        2.0MB

      • memory/2836-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2836-2-0x0000000000850000-0x0000000000863000-memory.dmp

        Filesize

        76KB

      • memory/4732-19-0x0000000000400000-0x00000000005F8000-memory.dmp

        Filesize

        2.0MB

      • memory/4732-12-0x0000000000400000-0x00000000005F8000-memory.dmp

        Filesize

        2.0MB

      • memory/4732-13-0x0000000000400000-0x00000000005F8000-memory.dmp

        Filesize

        2.0MB

      • memory/4732-11-0x0000000000400000-0x00000000005F8000-memory.dmp

        Filesize

        2.0MB