Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05-10-2024 17:59

General

  • Target

    e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539N.exe

  • Size

    249KB

  • MD5

    35d94a64c3beb2bd39080b05fc763f70

  • SHA1

    5f08d3f5d0998b6eb80dd986b8efe628a5c58e19

  • SHA256

    e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539

  • SHA512

    5803cabffde0c2c62b94ce88d7243422badfc680522816d41e81b57ede4973132a3d3802b90e7dd379375409dd57d1232e796b541240819ade75b3ae2d39e2a4

  • SSDEEP

    3072:2GGHLMg57JJiSWbWkyYhnNh/RE/GtymuQ2fgu5NlssAxaxWT6Uf7J:RGHLMwlEBDxZY/Wmel

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\e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539N.exe
    "C:\Users\Admin\AppData\Local\Temp\e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539N.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2216
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mkyvlhhh\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2240
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dgdwnpjz.exe" C:\Windows\SysWOW64\mkyvlhhh\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2536
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create mkyvlhhh binPath= "C:\Windows\SysWOW64\mkyvlhhh\dgdwnpjz.exe /d\"C:\Users\Admin\AppData\Local\Temp\e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539N.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2300
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description mkyvlhhh "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2720
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start mkyvlhhh
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2868
    • 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:2740
  • C:\Windows\SysWOW64\mkyvlhhh\dgdwnpjz.exe
    C:\Windows\SysWOW64\mkyvlhhh\dgdwnpjz.exe /d"C:\Users\Admin\AppData\Local\Temp\e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539N.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2772
    • 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:2264

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    10.8MB

    MD5

    061776853f7ca56fdd846698abb7b9de

    SHA1

    e7187454fe1e3f711f3509cd2a2c92cadf8ec5b4

    SHA256

    7be65b4b5a854f431d32b1fb3d9bc4f71f8f6708543eb9c3305d86b5d1fce181

    SHA512

    e1fbe3790a12ca8aedad609d542da3fe24c81ce272cb7c897830f2d6fcdf73adf10ccbf05a46006037302477622544dd2bef3f88cffc2bcbe8a249eb048e80a2

  • memory/2216-1-0x0000000000650000-0x0000000000750000-memory.dmp

    Filesize

    1024KB

  • memory/2216-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2216-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2216-7-0x0000000000400000-0x000000000053A000-memory.dmp

    Filesize

    1.2MB

  • memory/2216-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2216-8-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2264-47-0x0000000000130000-0x0000000000135000-memory.dmp

    Filesize

    20KB

  • memory/2264-55-0x0000000000140000-0x0000000000147000-memory.dmp

    Filesize

    28KB

  • memory/2264-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2264-30-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2264-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2264-20-0x0000000001A20000-0x0000000001C2F000-memory.dmp

    Filesize

    2.1MB

  • memory/2264-27-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-24-0x0000000000110000-0x0000000000116000-memory.dmp

    Filesize

    24KB

  • memory/2264-23-0x0000000001A20000-0x0000000001C2F000-memory.dmp

    Filesize

    2.1MB

  • memory/2264-50-0x0000000000130000-0x0000000000135000-memory.dmp

    Filesize

    20KB

  • memory/2264-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2264-46-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-51-0x00000000056D0000-0x0000000005ADB000-memory.dmp

    Filesize

    4.0MB

  • memory/2264-54-0x00000000056D0000-0x0000000005ADB000-memory.dmp

    Filesize

    4.0MB

  • memory/2264-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2264-45-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-44-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-43-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-42-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-41-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-40-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-39-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-37-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-36-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-35-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-34-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-33-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-32-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-31-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2264-38-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2772-15-0x0000000000400000-0x000000000053A000-memory.dmp

    Filesize

    1.2MB