Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    05-09-2024 10:39

General

  • Target

    743e88ce351815e356e3605246222b8076c5ea5e79bc0a9c5304504a67818ac8.exe

  • Size

    424KB

  • MD5

    f50413dcad54999b078491cda8cc97eb

  • SHA1

    b9757f71c4c63cdfdcd4b4e7e81343d2140fb97b

  • SHA256

    743e88ce351815e356e3605246222b8076c5ea5e79bc0a9c5304504a67818ac8

  • SHA512

    2ea5bd66f9365d7dfd14fe1a03234e02c17353e0f8d94316d7c15bb533444e68132f3de3b48ca366d147f0a21d4665730f00c9ae5d6981330680f9d31b03e74a

  • SSDEEP

    6144:xb7/BJsZfVjljXIJLprKi7Skl1QoRXZYsoS7ZD17T4kXwA:xXBJsZfVjlrgLND7SG1QyvH7T4k

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) 2 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).

  • 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.

  • 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 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\743e88ce351815e356e3605246222b8076c5ea5e79bc0a9c5304504a67818ac8.exe
    "C:\Users\Admin\AppData\Local\Temp\743e88ce351815e356e3605246222b8076c5ea5e79bc0a9c5304504a67818ac8.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1656
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xzywgjan\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1480
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mygdjwca.exe" C:\Windows\SysWOW64\xzywgjan\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2752
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create xzywgjan binPath= "C:\Windows\SysWOW64\xzywgjan\mygdjwca.exe /d\"C:\Users\Admin\AppData\Local\Temp\743e88ce351815e356e3605246222b8076c5ea5e79bc0a9c5304504a67818ac8.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2760
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description xzywgjan "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2612
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start xzywgjan
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2724
    • 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:2608
  • C:\Windows\SysWOW64\xzywgjan\mygdjwca.exe
    C:\Windows\SysWOW64\xzywgjan\mygdjwca.exe /d"C:\Users\Admin\AppData\Local\Temp\743e88ce351815e356e3605246222b8076c5ea5e79bc0a9c5304504a67818ac8.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2908
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • 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:2800

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.6MB

    MD5

    588fc1ae78e317f10b08650cd88c305a

    SHA1

    871e1cb90e5f73ca9a4233abd28cd1701d408422

    SHA256

    93d6074449f153d9dfbe354853a4dc81f337ce2e1f96d82814a52ad8400aaaef

    SHA512

    32ec3eca89c6c195c6c4a4b4f60390e403eaeaa5d3686a38ed47452b6ccd4ee65db188bcd9a253b005a9a01954f90222e35c8589dcc2ae858491f952d090de5c

  • memory/1656-15-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1656-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1656-4-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/1656-14-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/1656-1-0x00000000007C0000-0x00000000008C0000-memory.dmp

    Filesize

    1024KB

  • memory/2800-45-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-42-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-9-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2800-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2800-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2800-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2800-19-0x00000000017B0000-0x00000000019BF000-memory.dmp

    Filesize

    2.1MB

  • memory/2800-54-0x0000000000280000-0x0000000000287000-memory.dmp

    Filesize

    28KB

  • memory/2800-50-0x0000000005360000-0x000000000576B000-memory.dmp

    Filesize

    4.0MB

  • memory/2800-53-0x0000000005360000-0x000000000576B000-memory.dmp

    Filesize

    4.0MB

  • memory/2800-49-0x0000000000230000-0x0000000000235000-memory.dmp

    Filesize

    20KB

  • memory/2800-46-0x0000000000230000-0x0000000000235000-memory.dmp

    Filesize

    20KB

  • memory/2800-22-0x00000000017B0000-0x00000000019BF000-memory.dmp

    Filesize

    2.1MB

  • memory/2800-44-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-43-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2800-41-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-40-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-39-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-38-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-37-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-36-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-35-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-34-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-33-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-32-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-31-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-30-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-29-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-26-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2800-23-0x00000000001D0000-0x00000000001D6000-memory.dmp

    Filesize

    24KB

  • memory/2908-13-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB